Vendor import of clang trunk r178860:

http://llvm.org/svn/llvm-project/cfe/trunk@178860
author: dim <dim@FreeBSD.org> 2013-04-08 18:45:10 +0000
committer: dim <dim@FreeBSD.org> 2013-04-08 18:45:10 +0000
commit: c72c57c9e9b69944e3e009cd5e209634839581d3 (patch)
tree: 4fc2f184c499d106f29a386c452b49e5197bf63d /include/clang
parent: 5b20025c30d23d521e12c1f33ec8fa6b821952cd (diff)
download: FreeBSD-src-c72c57c9e9b69944e3e009cd5e209634839581d3.zip
FreeBSD-src-c72c57c9e9b69944e3e009cd5e209634839581d3.tar.gz
264 files changed, 10579 insertions, 4857 deletions
diff --git a/include/clang/ARCMigrate/ARCMT.h b/include/clang/ARCMigrate/ARCMT.h
index cce8661..c167d3c 100644
--- a/include/clang/ARCMigrate/ARCMT.h
+++ b/include/clang/ARCMigrate/ARCMT.h
@@ -11,8 +11,8 @@
 #define LLVM_CLANG_ARCMIGRATE_ARCMT_H
 
 #include "clang/ARCMigrate/FileRemapper.h"
-#include "clang/Frontend/CompilerInvocation.h"
 #include "clang/Basic/SourceLocation.h"
+#include "clang/Frontend/CompilerInvocation.h"
 
 namespace clang {
   class ASTContext;
diff --git a/include/clang/ARCMigrate/ARCMTActions.h b/include/clang/ARCMigrate/ARCMTActions.h
index e075252..2daaf73 100644
--- a/include/clang/ARCMigrate/ARCMTActions.h
+++ b/include/clang/ARCMigrate/ARCMTActions.h
@@ -10,8 +10,8 @@
 #ifndef LLVM_CLANG_ARCMIGRATE_ARCMT_ACTION_H
 #define LLVM_CLANG_ARCMIGRATE_ARCMT_ACTION_H
 
-#include "clang/Frontend/FrontendAction.h"
 #include "clang/ARCMigrate/FileRemapper.h"
+#include "clang/Frontend/FrontendAction.h"
 #include "llvm/ADT/OwningPtr.h"
 
 namespace clang {
diff --git a/include/clang/ARCMigrate/FileRemapper.h b/include/clang/ARCMigrate/FileRemapper.h
index fe7cfad..94c9e8f 100644
--- a/include/clang/ARCMigrate/FileRemapper.h
+++ b/include/clang/ARCMigrate/FileRemapper.h
@@ -11,9 +11,9 @@
 #define LLVM_CLANG_ARCMIGRATE_FILEREMAPPER_H
 
 #include "clang/Basic/LLVM.h"
+#include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/PointerUnion.h"
-#include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/StringRef.h"
 
 namespace llvm {
diff --git a/include/clang/AST/APValue.h b/include/clang/AST/APValue.h
index 1b6e90c..ec8faa4 100644
--- a/include/clang/AST/APValue.h
+++ b/include/clang/AST/APValue.h
@@ -15,8 +15,8 @@
 #define LLVM_CLANG_AST_APVALUE_H
 
 #include "clang/Basic/LLVM.h"
-#include "llvm/ADT/APSInt.h"
 #include "llvm/ADT/APFloat.h"
+#include "llvm/ADT/APSInt.h"
 #include "llvm/ADT/PointerIntPair.h"
 #include "llvm/ADT/PointerUnion.h"
 
diff --git a/include/clang/AST/AST.h b/include/clang/AST/AST.h
index 164c5fb..6db351d 100644
--- a/include/clang/AST/AST.h
+++ b/include/clang/AST/AST.h
@@ -22,7 +22,7 @@
 #include "clang/AST/DeclTemplate.h"
 #include "clang/AST/Expr.h"
 #include "clang/AST/ExprObjC.h"
-#include "clang/AST/Type.h"
 #include "clang/AST/StmtVisitor.h"
+#include "clang/AST/Type.h"
 
 #endif
diff --git a/include/clang/AST/ASTConsumer.h b/include/clang/AST/ASTConsumer.h
index 37b0740..ae77943 100644
--- a/include/clang/AST/ASTConsumer.h
+++ b/include/clang/AST/ASTConsumer.h
@@ -17,9 +17,9 @@
 namespace clang {
   class ASTContext;
   class CXXRecordDecl;
+  class Decl;
   class DeclGroupRef;
   class HandleTagDeclDefinition;
-  class PPMutationListener;
   class ASTMutationListener;
   class ASTDeserializationListener; // layering violation because void* is ugly
   class SemaConsumer; // layering violation required for safe SemaConsumer
@@ -112,11 +112,6 @@ public:
   /// it was actually used.
   virtual void HandleVTable(CXXRecordDecl *RD, bool DefinitionRequired) {}
 
-  /// \brief If the consumer is interested in preprocessor entities getting
-  /// modified after their initial creation, it should return a pointer to
-  /// a PPMutationListener here.
-  virtual PPMutationListener *GetPPMutationListener() { return 0; }
-
   /// \brief If the consumer is interested in entities getting modified after
   /// their initial creation, it should return a pointer to
   /// an ASTMutationListener here.
@@ -130,6 +125,14 @@ public:
 
   /// PrintStats - If desired, print any statistics.
   virtual void PrintStats() {}
+
+  /// \brief This callback is called for each function if the Parser was
+  /// initialized with \c SkipFunctionBodies set to \c true.
+  ///
+  /// \return \c true if the function's body should be skipped. The function
+  /// body may be parsed anyway if it is needed (for instance, if it contains
+  /// the code completion point or is constexpr).
+  virtual bool shouldSkipFunctionBody(Decl *D) { return true; }
 };
 
 } // end namespace clang.
diff --git a/include/clang/AST/ASTContext.h b/include/clang/AST/ASTContext.h
index f0934b7..d4878a9 100644
--- a/include/clang/AST/ASTContext.h
+++ b/include/clang/AST/ASTContext.h
@@ -15,21 +15,23 @@
 #ifndef LLVM_CLANG_AST_ASTCONTEXT_H
 #define LLVM_CLANG_AST_ASTCONTEXT_H
 
-#include "clang/Basic/AddressSpaces.h"
-#include "clang/Basic/IdentifierTable.h"
-#include "clang/Basic/LangOptions.h"
-#include "clang/Basic/OperatorKinds.h"
-#include "clang/Basic/PartialDiagnostic.h"
-#include "clang/Basic/VersionTuple.h"
+#include "clang/AST/ASTTypeTraits.h"
+#include "clang/AST/CanonicalType.h"
+#include "clang/AST/CommentCommandTraits.h"
 #include "clang/AST/Decl.h"
 #include "clang/AST/LambdaMangleContext.h"
 #include "clang/AST/NestedNameSpecifier.h"
 #include "clang/AST/PrettyPrinter.h"
+#include "clang/AST/RawCommentList.h"
+#include "clang/AST/RecursiveASTVisitor.h"
 #include "clang/AST/TemplateName.h"
 #include "clang/AST/Type.h"
-#include "clang/AST/CanonicalType.h"
-#include "clang/AST/RawCommentList.h"
-#include "clang/AST/CommentCommandTraits.h"
+#include "clang/Basic/AddressSpaces.h"
+#include "clang/Basic/IdentifierTable.h"
+#include "clang/Basic/LangOptions.h"
+#include "clang/Basic/OperatorKinds.h"
+#include "clang/Basic/PartialDiagnostic.h"
+#include "clang/Basic/VersionTuple.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
@@ -57,28 +59,12 @@ namespace clang {
   class TargetInfo;
   class CXXABI;
   // Decls
-  class DeclContext;
-  class CXXConversionDecl;
-  class CXXMethodDecl;
-  class CXXRecordDecl;
-  class Decl;
-  class FieldDecl;
   class MangleContext;
   class ObjCIvarDecl;
-  class ObjCIvarRefExpr;
   class ObjCPropertyDecl;
-  class ParmVarDecl;
-  class RecordDecl;
-  class StoredDeclsMap;
-  class TagDecl;
-  class TemplateTemplateParmDecl;
-  class TemplateTypeParmDecl;
-  class TranslationUnitDecl;
-  class TypeDecl;
-  class TypedefNameDecl;
+  class UnresolvedSetIterator;
   class UsingDecl;
   class UsingShadowDecl;
-  class UnresolvedSetIterator;
 
   namespace Builtin { class Context; }
 
@@ -91,7 +77,7 @@ namespace clang {
 class ASTContext : public RefCountedBase<ASTContext> {
   ASTContext &this_() { return *this; }
 
-  mutable std::vector<Type*> Types;
+  mutable SmallVector<Type *, 0> Types;
   mutable llvm::FoldingSet<ExtQuals> ExtQualNodes;
   mutable llvm::FoldingSet<ComplexType> ComplexTypes;
   mutable llvm::FoldingSet<PointerType> PointerTypes;
@@ -233,6 +219,8 @@ class ASTContext : public RefCountedBase<ASTContext> {
   QualType ObjCConstantStringType;
   mutable RecordDecl *CFConstantStringTypeDecl;
   
+  mutable QualType ObjCSuperType;
+  
   QualType ObjCNSStringType;
 
   /// \brief The typedef declaration for the Objective-C "instancetype" type.
@@ -343,7 +331,10 @@ class ASTContext : public RefCountedBase<ASTContext> {
   /// \brief Mapping from each declaration context to its corresponding lambda 
   /// mangling context.
   llvm::DenseMap<const DeclContext *, LambdaMangleContext> LambdaMangleContexts;
-  
+
+  llvm::DenseMap<const DeclContext *, unsigned> UnnamedMangleContexts;
+  llvm::DenseMap<const TagDecl *, unsigned> UnnamedMangleNumbers;
+
   /// \brief Mapping that stores parameterIndex values for ParmVarDecls when
   /// that value exceeds the bitfield size of ParmVarDeclBits.ParameterIndex.
   typedef llvm::DenseMap<const VarDecl *, unsigned> ParameterIndexTable;
@@ -393,6 +384,58 @@ public:
   OwningPtr<ExternalASTSource> ExternalSource;
   ASTMutationListener *Listener;
 
+  /// \brief Contains parents of a node.
+  typedef llvm::SmallVector<ast_type_traits::DynTypedNode, 1> ParentVector;
+
+  /// \brief Maps from a node to its parents.
+  typedef llvm::DenseMap<const void *, ParentVector> ParentMap;
+
+  /// \brief Returns the parents of the given node.
+  ///
+  /// Note that this will lazily compute the parents of all nodes
+  /// and store them for later retrieval. Thus, the first call is O(n)
+  /// in the number of AST nodes.
+  ///
+  /// Caveats and FIXMEs:
+  /// Calculating the parent map over all AST nodes will need to load the
+  /// full AST. This can be undesirable in the case where the full AST is
+  /// expensive to create (for example, when using precompiled header
+  /// preambles). Thus, there are good opportunities for optimization here.
+  /// One idea is to walk the given node downwards, looking for references
+  /// to declaration contexts - once a declaration context is found, compute
+  /// the parent map for the declaration context; if that can satisfy the
+  /// request, loading the whole AST can be avoided. Note that this is made
+  /// more complex by statements in templates having multiple parents - those
+  /// problems can be solved by building closure over the templated parts of
+  /// the AST, which also avoids touching large parts of the AST.
+  /// Additionally, we will want to add an interface to already give a hint
+  /// where to search for the parents, for example when looking at a statement
+  /// inside a certain function.
+  ///
+  /// 'NodeT' can be one of Decl, Stmt, Type, TypeLoc,
+  /// NestedNameSpecifier or NestedNameSpecifierLoc.
+  template <typename NodeT>
+  ParentVector getParents(const NodeT &Node) {
+    return getParents(ast_type_traits::DynTypedNode::create(Node));
+  }
+
+  ParentVector getParents(const ast_type_traits::DynTypedNode &Node) {
+    assert(Node.getMemoizationData() &&
+           "Invariant broken: only nodes that support memoization may be "
+           "used in the parent map.");
+    if (!AllParents) {
+      // We always need to run over the whole translation unit, as
+      // hasAncestor can escape any subtree.
+      AllParents.reset(
+          ParentMapASTVisitor::buildMap(*getTranslationUnitDecl()));
+    }
+    ParentMap::const_iterator I = AllParents->find(Node.getMemoizationData());
+    if (I == AllParents->end()) {
+      return ParentVector();
+    }
+    return I->second;
+  }
+
   const clang::PrintingPolicy &getPrintingPolicy() const {
     return PrintingPolicy;
   }
@@ -713,6 +756,10 @@ public:
   CanQualType PseudoObjectTy, ARCUnbridgedCastTy;
   CanQualType ObjCBuiltinIdTy, ObjCBuiltinClassTy, ObjCBuiltinSelTy;
   CanQualType ObjCBuiltinBoolTy;
+  CanQualType OCLImage1dTy, OCLImage1dArrayTy, OCLImage1dBufferTy;
+  CanQualType OCLImage2dTy, OCLImage2dArrayTy;
+  CanQualType OCLImage3dTy;
+  CanQualType OCLSamplerTy, OCLEventTy;
 
   // Types for deductions in C++0x [stmt.ranged]'s desugaring. Built on demand.
   mutable QualType AutoDeductTy;     // Deduction against 'auto'.
@@ -755,7 +802,7 @@ public:
   ASTMutationListener *getASTMutationListener() const { return Listener; }
 
   void PrintStats() const;
-  const std::vector<Type*>& getTypes() const { return Types; }
+  const SmallVectorImpl<Type *>& getTypes() const { return Types; }
 
   /// \brief Retrieve the declaration for the 128-bit signed integer type.
   TypedefDecl *getInt128Decl() const;
@@ -857,12 +904,17 @@ public:
     return cudaConfigureCallDecl;
   }
 
-  /// Builds the struct used for __block variables.
-  QualType BuildByRefType(StringRef DeclName, QualType Ty) const;
-
   /// Returns true iff we need copy/dispose helpers for the given type.
-  bool BlockRequiresCopying(QualType Ty) const;
-
+  bool BlockRequiresCopying(QualType Ty, const VarDecl *D);
+  
+  
+  /// Returns true, if given type has a known lifetime. HasByrefExtendedLayout is set
+  /// to false in this case. If HasByrefExtendedLayout returns true, byref variable
+  /// has extended lifetime. 
+  bool getByrefLifetime(QualType Ty,
+                        Qualifiers::ObjCLifetime &Lifetime,
+                        bool &HasByrefExtendedLayout) const;
+  
   /// \brief Return the uniqued reference to the type for an lvalue reference
   /// to the specified type.
   QualType getLValueReferenceType(QualType T, bool SpelledAsLValue = true)
@@ -941,8 +993,7 @@ public:
   }
 
   /// \brief Return a normal function type with a typed argument list.
-  QualType getFunctionType(QualType ResultTy,
-                           const QualType *Args, unsigned NumArgs,
+  QualType getFunctionType(QualType ResultTy, ArrayRef<QualType> Args,
                            const FunctionProtoType::ExtProtoInfo &EPI) const;
 
   /// \brief Return the unique reference to the type for the specified type
@@ -1025,7 +1076,7 @@ public:
                                             const TemplateArgument *Args) const;
 
   QualType getPackExpansionType(QualType Pattern,
-                                llvm::Optional<unsigned> NumExpansions);
+                                Optional<unsigned> NumExpansions);
 
   QualType getObjCInterfaceType(const ObjCInterfaceDecl *Decl,
                                 ObjCInterfaceDecl *PrevDecl = 0) const;
@@ -1094,6 +1145,14 @@ public:
   /// defined in <stddef.h> as defined by the target.
   QualType getWIntType() const { return WIntTy; }
 
+  /// \brief Return a type compatible with "intptr_t" (C99 7.18.1.4),
+  /// as defined by the target.
+  QualType getIntPtrType() const;
+
+  /// \brief Return a type compatible with "uintptr_t" (C99 7.18.1.4),
+  /// as defined by the target.
+  QualType getUIntPtrType() const;
+
   /// \brief Return the unique type for "ptrdiff_t" (C99 7.17) defined in
   /// <stddef.h>. Pointer - pointer requires this (C99 6.5.6p9).
   QualType getPointerDiffType() const;
@@ -1104,7 +1163,11 @@ public:
 
   /// \brief Return the C structure type used to represent constant CFStrings.
   QualType getCFConstantStringType() const;
-
+  
+  /// \brief Returns the C struct type for objc_super
+  QualType getObjCSuperType() const;
+  void setObjCSuperType(QualType ST) { ObjCSuperType = ST; }
+  
   /// Get the structure type used to representation CFStrings, or NULL
   /// if it hasn't yet been built.
   QualType getRawCFConstantStringType() const {
@@ -1545,14 +1608,27 @@ public:
   const ASTRecordLayout &
   getASTObjCImplementationLayout(const ObjCImplementationDecl *D) const;
 
-  /// \brief Get the key function for the given record decl, or NULL if there
-  /// isn't one.
+  /// \brief Get our current best idea for the key function of the
+  /// given record decl, or NULL if there isn't one.
   ///
   /// The key function is, according to the Itanium C++ ABI section 5.2.3:
+  ///   ...the first non-pure virtual function that is not inline at the
+  ///   point of class definition.
   ///
-  /// ...the first non-pure virtual function that is not inline at the point
-  /// of class definition.
-  const CXXMethodDecl *getKeyFunction(const CXXRecordDecl *RD);
+  /// Other ABIs use the same idea.  However, the ARM C++ ABI ignores
+  /// virtual functions that are defined 'inline', which means that
+  /// the result of this computation can change.
+  const CXXMethodDecl *getCurrentKeyFunction(const CXXRecordDecl *RD);
+
+  /// \brief Observe that the given method cannot be a key function.
+  /// Checks the key-function cache for the method's class and clears it
+  /// if matches the given declaration.
+  ///
+  /// This is used in ABIs where out-of-line definitions marked
+  /// inline are not considered to be key functions.
+  ///
+  /// \param method should be the declaration from the class definition
+  void setNonKeyFunction(const CXXMethodDecl *method);
 
   /// Get the offset of a FieldDecl or IndirectFieldDecl, in bits.
   uint64_t getFieldOffset(const ValueDecl *FD) const;
@@ -1885,8 +1961,8 @@ public:
   //                    Type Iterators.
   //===--------------------------------------------------------------------===//
 
-  typedef std::vector<Type*>::iterator       type_iterator;
-  typedef std::vector<Type*>::const_iterator const_type_iterator;
+  typedef SmallVectorImpl<Type *>::iterator       type_iterator;
+  typedef SmallVectorImpl<Type *>::const_iterator const_type_iterator;
 
   type_iterator types_begin() { return Types.begin(); }
   type_iterator types_end() { return Types.end(); }
@@ -1943,7 +2019,7 @@ public:
   /// \brief Returns the Objective-C interface that \p ND belongs to if it is
   /// an Objective-C method/property/ivar etc. that is part of an interface,
   /// otherwise returns null.
-  ObjCInterfaceDecl *getObjContainingInterface(NamedDecl *ND) const;
+  const ObjCInterfaceDecl *getObjContainingInterface(const NamedDecl *ND) const;
   
   /// \brief Set the copy inialization expression of a block var decl.
   void setBlockVarCopyInits(VarDecl*VD, Expr* Init);
@@ -1993,6 +2069,9 @@ public:
   /// it is not used.
   bool DeclMustBeEmitted(const Decl *D);
 
+  void addUnnamedTag(const TagDecl *Tag);
+  int getUnnamedTagManglingNumber(const TagDecl *Tag) const;
+
   /// \brief Retrieve the lambda mangling number for a lambda expression.
   unsigned getLambdaManglingNumber(CXXMethodDecl *CallOperator);
   
@@ -2077,7 +2156,8 @@ private:
                                   bool EncodingProperty = false,
                                   bool StructField = false,
                                   bool EncodeBlockParameters = false,
-                                  bool EncodeClassNames = false) const;
+                                  bool EncodeClassNames = false,
+                                  bool EncodePointerToObjCTypedef = false) const;
 
   // Adds the encoding of the structure's members.
   void getObjCEncodingForStructureImpl(RecordDecl *RD, std::string &S,
@@ -2109,8 +2189,81 @@ private:
   friend class DeclContext;
   friend class DeclarationNameTable;
   void ReleaseDeclContextMaps();
+
+  /// \brief A \c RecursiveASTVisitor that builds a map from nodes to their
+  /// parents as defined by the \c RecursiveASTVisitor.
+  ///
+  /// Note that the relationship described here is purely in terms of AST
+  /// traversal - there are other relationships (for example declaration context)
+  /// in the AST that are better modeled by special matchers.
+  ///
+  /// FIXME: Currently only builds up the map using \c Stmt and \c Decl nodes.
+  class ParentMapASTVisitor : public RecursiveASTVisitor<ParentMapASTVisitor> {
+  public:
+    /// \brief Builds and returns the translation unit's parent map.
+    ///
+    ///  The caller takes ownership of the returned \c ParentMap.
+    static ParentMap *buildMap(TranslationUnitDecl &TU) {
+      ParentMapASTVisitor Visitor(new ParentMap);
+      Visitor.TraverseDecl(&TU);
+      return Visitor.Parents;
+    }
+
+  private:
+    typedef RecursiveASTVisitor<ParentMapASTVisitor> VisitorBase;
+
+    ParentMapASTVisitor(ParentMap *Parents) : Parents(Parents) {
+    }
+
+    bool shouldVisitTemplateInstantiations() const {
+      return true;
+    }
+    bool shouldVisitImplicitCode() const {
+      return true;
+    }
+    // Disables data recursion. We intercept Traverse* methods in the RAV, which
+    // are not triggered during data recursion.
+    bool shouldUseDataRecursionFor(clang::Stmt *S) const {
+      return false;
+    }
+
+    template <typename T>
+    bool TraverseNode(T *Node, bool(VisitorBase:: *traverse) (T *)) {
+      if (Node == NULL)
+        return true;
+      if (ParentStack.size() > 0)
+        // FIXME: Currently we add the same parent multiple times, for example
+        // when we visit all subexpressions of template instantiations; this is
+        // suboptimal, bug benign: the only way to visit those is with
+        // hasAncestor / hasParent, and those do not create new matches.
+        // The plan is to enable DynTypedNode to be storable in a map or hash
+        // map. The main problem there is to implement hash functions /
+        // comparison operators for all types that DynTypedNode supports that
+        // do not have pointer identity.
+        (*Parents)[Node].push_back(ParentStack.back());
+      ParentStack.push_back(ast_type_traits::DynTypedNode::create(*Node));
+      bool Result = (this ->* traverse) (Node);
+      ParentStack.pop_back();
+      return Result;
+    }
+
+    bool TraverseDecl(Decl *DeclNode) {
+      return TraverseNode(DeclNode, &VisitorBase::TraverseDecl);
+    }
+
+    bool TraverseStmt(Stmt *StmtNode) {
+      return TraverseNode(StmtNode, &VisitorBase::TraverseStmt);
+    }
+
+    ParentMap *Parents;
+    llvm::SmallVector<ast_type_traits::DynTypedNode, 16> ParentStack;
+
+    friend class RecursiveASTVisitor<ParentMapASTVisitor>;
+  };
+
+  llvm::OwningPtr<ParentMap> AllParents;
 };
-  
+
 /// \brief Utility function for constructing a nullary selector.
 static inline Selector GetNullarySelector(StringRef name, ASTContext& Ctx) {
   IdentifierInfo* II = &Ctx.Idents.get(name);
@@ -2132,8 +2285,8 @@ static inline Selector GetUnarySelector(StringRef name, ASTContext& Ctx) {
 /// This placement form of operator new uses the ASTContext's allocator for
 /// obtaining memory.
 ///
-/// IMPORTANT: These are also declared in clang/AST/Attr.h! Any changes here
-/// need to also be made there.
+/// IMPORTANT: These are also declared in clang/AST/AttrIterator.h! Any changes
+/// here need to also be made there.
 ///
 /// We intentionally avoid using a nothrow specification here so that the calls
 /// to this operator will not perform a null check on the result -- the
diff --git a/include/clang/AST/ASTImporter.h b/include/clang/AST/ASTImporter.h
index 46a9881..1672ab2 100644
--- a/include/clang/AST/ASTImporter.h
+++ b/include/clang/AST/ASTImporter.h
@@ -48,6 +48,9 @@ namespace clang {
 
     /// \brief Whether to perform a minimal import.
     bool Minimal;
+
+    /// \brief Whether the last diagnostic came from the "from" context.
+    bool LastDiagFromFrom;
     
     /// \brief Mapping from the already-imported types in the "from" context
     /// to the corresponding types in the "to" context.
diff --git a/include/clang/AST/ASTMutationListener.h b/include/clang/AST/ASTMutationListener.h
index 56d1526..6b70285 100644
--- a/include/clang/AST/ASTMutationListener.h
+++ b/include/clang/AST/ASTMutationListener.h
@@ -16,18 +16,19 @@
 #include "clang/Basic/SourceLocation.h"
 
 namespace clang {
-  class Decl;
-  class DeclContext;
-  class TagDecl;
   class CXXRecordDecl;
   class ClassTemplateDecl;
   class ClassTemplateSpecializationDecl;
+  class Decl;
+  class DeclContext;
   class FunctionDecl;
   class FunctionTemplateDecl;
   class ObjCCategoryDecl;
-  class ObjCInterfaceDecl;
   class ObjCContainerDecl;
+  class ObjCInterfaceDecl;
   class ObjCPropertyDecl;
+  class TagDecl;
+  class VarDecl;
 
 /// \brief An abstract interface that should be implemented by listeners
 /// that want to be notified when an AST entity gets modified after its
diff --git a/include/clang/ASTMatchers/ASTTypeTraits.h b/include/clang/AST/ASTTypeTraits.h
index bda53ea..4688b12 100644
--- a/include/clang/ASTMatchers/ASTTypeTraits.h
+++ b/include/clang/AST/ASTTypeTraits.h
@@ -1,4 +1,4 @@
-//===--- ASTMatchersTypeTraits.h --------------------------------*- C++ -*-===//
+//===--- ASTTypeTraits.h ----------------------------------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
@@ -12,11 +12,12 @@
 //
 //===----------------------------------------------------------------------===//
 
-#ifndef LLVM_CLANG_AST_MATCHERS_AST_TYPE_TRAITS_H
-#define LLVM_CLANG_AST_MATCHERS_AST_TYPE_TRAITS_H
+#ifndef LLVM_CLANG_AST_AST_TYPE_TRAITS_H
+#define LLVM_CLANG_AST_AST_TYPE_TRAITS_H
 
 #include "clang/AST/Decl.h"
 #include "clang/AST/Stmt.h"
+#include "clang/AST/TypeLoc.h"
 #include "llvm/Support/AlignOf.h"
 
 namespace clang {
@@ -87,8 +88,9 @@ private:
   /// guaranteed to be unique pointers pointing to dedicated storage in the
   /// AST. \c QualTypes on the other hand do not have storage or unique
   /// pointers and thus need to be stored by value.
-  llvm::AlignedCharArrayUnion<Decl*, QualType, TypeLoc, NestedNameSpecifierLoc>
-    Storage;
+  llvm::AlignedCharArrayUnion<Decl *, Stmt *, NestedNameSpecifier,
+                              NestedNameSpecifierLoc, QualType, Type,
+                              TypeLoc> Storage;
 };
 
 // FIXME: Pull out abstraction for the following.
@@ -206,4 +208,4 @@ inline const void *DynTypedNode::getMemoizationData() const {
 } // end namespace ast_type_traits
 } // end namespace clang
 
-#endif // LLVM_CLANG_AST_MATCHERS_AST_TYPE_TRAITS_H
+#endif // LLVM_CLANG_AST_AST_TYPE_TRAITS_H
diff --git a/include/clang/AST/ASTUnresolvedSet.h b/include/clang/AST/ASTUnresolvedSet.h
new file mode 100644
index 0000000..c709895
--- /dev/null
+++ b/include/clang/AST/ASTUnresolvedSet.h
@@ -0,0 +1,86 @@
+//===-- ASTUnresolvedSet.h - Unresolved sets of declarations  ---*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file provides an UnresolvedSet-like class, whose contents are
+//  allocated using the allocator associated with an ASTContext.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_AST_ASTUNRESOLVEDSET_H
+#define LLVM_CLANG_AST_ASTUNRESOLVEDSET_H
+
+#include "clang/AST/ASTVector.h"
+#include "clang/AST/UnresolvedSet.h"
+
+namespace clang {
+
+/// \brief An UnresolvedSet-like class which uses the ASTContext's allocator.
+class ASTUnresolvedSet {
+  typedef ASTVector<DeclAccessPair> DeclsTy;
+  DeclsTy Decls;
+
+  ASTUnresolvedSet(const ASTUnresolvedSet &) LLVM_DELETED_FUNCTION;
+  void operator=(const ASTUnresolvedSet &) LLVM_DELETED_FUNCTION;
+
+public:
+  ASTUnresolvedSet() {}
+  ASTUnresolvedSet(ASTContext &C, unsigned N) : Decls(C, N) {}
+
+  typedef UnresolvedSetIterator iterator;
+  typedef UnresolvedSetIterator const_iterator;
+
+  iterator begin() { return iterator(Decls.begin()); }
+  iterator end() { return iterator(Decls.end()); }
+
+  const_iterator begin() const { return const_iterator(Decls.begin()); }
+  const_iterator end() const { return const_iterator(Decls.end()); }
+
+  void addDecl(ASTContext &C, NamedDecl *D) {
+    addDecl(C, D, AS_none);
+  }
+
+  void addDecl(ASTContext &C, NamedDecl *D, AccessSpecifier AS) {
+    Decls.push_back(DeclAccessPair::make(D, AS), C);
+  }
+
+  /// Replaces the given declaration with the new one, once.
+  ///
+  /// \return true if the set changed
+  bool replace(const NamedDecl* Old, NamedDecl *New) {
+    for (DeclsTy::iterator I = Decls.begin(), E = Decls.end(); I != E; ++I)
+      if (I->getDecl() == Old)
+        return (I->setDecl(New), true);
+    return false;
+  }
+
+  void erase(unsigned I) {
+    Decls[I] = Decls.back();
+    Decls.pop_back();
+  }
+
+  void clear() { Decls.clear(); }
+
+  bool empty() const { return Decls.empty(); }
+  unsigned size() const { return Decls.size(); }
+
+  void reserve(ASTContext &C, unsigned N) {
+    Decls.reserve(C, N);
+  }
+
+  void append(ASTContext &C, iterator I, iterator E) {
+    Decls.append(C, I.ir, E.ir);
+  }
+
+  DeclAccessPair &operator[](unsigned I) { return Decls[I]; }
+  const DeclAccessPair &operator[](unsigned I) const { return Decls[I]; }
+};
+  
+} // namespace clang
+
+#endif
diff --git a/include/clang/AST/ASTVector.h b/include/clang/AST/ASTVector.h
index 4ff5ea3..669e50d 100644
--- a/include/clang/AST/ASTVector.h
+++ b/include/clang/AST/ASTVector.h
@@ -18,12 +18,13 @@
 #ifndef LLVM_CLANG_AST_VECTOR
 #define LLVM_CLANG_AST_VECTOR
 
-#include "llvm/Support/type_traits.h"
-#include "llvm/Support/Allocator.h"
+#include "clang/AST/AttrIterator.h"
 #include "llvm/ADT/PointerIntPair.h"
+#include "llvm/Support/Allocator.h"
+#include "llvm/Support/type_traits.h"
 #include <algorithm>
-#include <memory>
 #include <cstring>
+#include <memory>
 
 #ifdef _MSC_VER
 namespace std {
@@ -50,6 +51,7 @@ namespace std {
 #endif
 
 namespace clang {
+  class ASTContext;
 
 template<typename T>
 class ASTVector {
@@ -59,7 +61,9 @@ class ASTVector {
 
 public:
   // Default ctor - Initialize to empty.
-  explicit ASTVector(ASTContext &C, unsigned N = 0)
+  ASTVector() : Begin(NULL), End(NULL), Capacity(NULL) { }
+
+  ASTVector(ASTContext &C, unsigned N)
   : Begin(NULL), End(NULL), Capacity(NULL) {
     reserve(C, N);
   }
diff --git a/include/clang/AST/Attr.h b/include/clang/AST/Attr.h
index 12a9855..27dcef2 100644
--- a/include/clang/AST/Attr.h
+++ b/include/clang/AST/Attr.h
@@ -14,9 +14,10 @@
 #ifndef LLVM_CLANG_AST_ATTR_H
 #define LLVM_CLANG_AST_ATTR_H
 
-#include "clang/Basic/LLVM.h"
-#include "clang/Basic/AttrKinds.h"
+#include "clang/AST/AttrIterator.h"
 #include "clang/AST/Type.h"
+#include "clang/Basic/AttrKinds.h"
+#include "clang/Basic/LLVM.h"
 #include "clang/Basic/SourceLocation.h"
 #include "clang/Basic/VersionTuple.h"
 #include "llvm/ADT/SmallVector.h"
@@ -26,7 +27,6 @@
 #include "llvm/Support/raw_ostream.h"
 #include <cassert>
 #include <cstring>
-#include <algorithm>
 
 namespace clang {
   class ASTContext;
@@ -36,23 +36,6 @@ namespace clang {
   class QualType;
   class FunctionDecl;
   class TypeSourceInfo;
-}
-
-// Defined in ASTContext.h
-void *operator new(size_t Bytes, const clang::ASTContext &C,
-                   size_t Alignment = 16);
-// FIXME: Being forced to not have a default argument here due to redeclaration
-//        rules on default arguments sucks
-void *operator new[](size_t Bytes, const clang::ASTContext &C,
-                     size_t Alignment);
-
-// It is good practice to pair new/delete operators.  Also, MSVC gives many
-// warnings if a matching delete overload is not declared, even though the
-// throw() spec guarantees it will not be implicitly called.
-void operator delete(void *Ptr, const clang::ASTContext &C, size_t);
-void operator delete[](void *Ptr, const clang::ASTContext &C, size_t);
-
-namespace clang {
 
 /// Attr - This represents one attribute.
 class Attr {
@@ -61,10 +44,16 @@ private:
   unsigned AttrKind : 16;
 
 protected:
+  /// An index into the spelling list of an
+  /// attribute defined in Attr.td file.
+  unsigned SpellingListIndex : 4;
+
   bool Inherited : 1;
 
+  bool IsPackExpansion : 1;
+
   virtual ~Attr();
-  
+
   void* operator new(size_t bytes) throw() {
     llvm_unreachable("Attrs cannot be allocated with regular 'new'.");
   }
@@ -84,14 +73,17 @@ public:
   }
 
 protected:
-  Attr(attr::Kind AK, SourceRange R)
-    : Range(R), AttrKind(AK), Inherited(false) {}
+  Attr(attr::Kind AK, SourceRange R, unsigned SpellingListIndex = 0)
+    : Range(R), AttrKind(AK), SpellingListIndex(SpellingListIndex),
+      Inherited(false), IsPackExpansion(false) {}
 
 public:
 
   attr::Kind getKind() const {
     return static_cast<attr::Kind>(AttrKind);
   }
+  
+  unsigned getSpellingListIndex() const { return SpellingListIndex; }
 
   SourceLocation getLocation() const { return Range.getBegin(); }
   SourceRange getRange() const { return Range; }
@@ -99,21 +91,24 @@ public:
 
   bool isInherited() const { return Inherited; }
 
+  void setPackExpansion(bool PE) { IsPackExpansion = PE; }
+  bool isPackExpansion() const { return IsPackExpansion; }
+
   // Clone this attribute.
-  virtual Attr* clone(ASTContext &C) const = 0;
+  virtual Attr *clone(ASTContext &C) const = 0;
 
   virtual bool isLateParsed() const { return false; }
 
   // Pretty print this attribute.
-  virtual void printPretty(llvm::raw_ostream &OS,
+  virtual void printPretty(raw_ostream &OS,
                            const PrintingPolicy &Policy) const = 0;
 };
 
 class InheritableAttr : public Attr {
   virtual void anchor();
 protected:
-  InheritableAttr(attr::Kind AK, SourceRange R)
-    : Attr(AK, R) {}
+  InheritableAttr(attr::Kind AK, SourceRange R, unsigned SpellingListIndex = 0)
+    : Attr(AK, R, SpellingListIndex) {}
 
 public:
   void setInherited(bool I) { Inherited = I; }
@@ -127,125 +122,35 @@ public:
 class InheritableParamAttr : public InheritableAttr {
   virtual void anchor();
 protected:
-  InheritableParamAttr(attr::Kind AK, SourceRange R)
-    : InheritableAttr(AK, R) {}
+  InheritableParamAttr(attr::Kind AK, SourceRange R,
+                       unsigned SpellingListIndex = 0)
+    : InheritableAttr(AK, R, SpellingListIndex) {}
 
 public:
   // Implement isa/cast/dyncast/etc.
   static bool classof(const Attr *A) {
+    // Relies on relative order of enum emission with respect to MS inheritance
+    // attrs.
     return A->getKind() <= attr::LAST_INHERITABLE_PARAM;
   }
 };
 
-#include "clang/AST/Attrs.inc"
-
-/// AttrVec - A vector of Attr, which is how they are stored on the AST.
-typedef SmallVector<Attr*, 2> AttrVec;
-typedef SmallVector<const Attr*, 2> ConstAttrVec;
-
-/// specific_attr_iterator - Iterates over a subrange of an AttrVec, only
-/// providing attributes that are of a specifc type.
-template <typename SpecificAttr, typename Container = AttrVec>
-class specific_attr_iterator {
-  typedef typename Container::const_iterator Iterator;
-
-  /// Current - The current, underlying iterator.
-  /// In order to ensure we don't dereference an invalid iterator unless
-  /// specifically requested, we don't necessarily advance this all the
-  /// way. Instead, we advance it when an operation is requested; if the
-  /// operation is acting on what should be a past-the-end iterator,
-  /// then we offer no guarantees, but this way we do not dererence a
-  /// past-the-end iterator when we move to a past-the-end position.
-  mutable Iterator Current;
-
-  void AdvanceToNext() const {
-    while (!isa<SpecificAttr>(*Current))
-      ++Current;
-  }
-
-  void AdvanceToNext(Iterator I) const {
-    while (Current != I && !isa<SpecificAttr>(*Current))
-      ++Current;
-  }
+class MSInheritanceAttr : public InheritableAttr {
+  virtual void anchor();
+protected:
+  MSInheritanceAttr(attr::Kind AK, SourceRange R, unsigned SpellingListIndex = 0)
+    : InheritableAttr(AK, R, SpellingListIndex) {}
 
 public:
-  typedef SpecificAttr*             value_type;
-  typedef SpecificAttr*             reference;
-  typedef SpecificAttr*             pointer;
-  typedef std::forward_iterator_tag iterator_category;
-  typedef std::ptrdiff_t            difference_type;
-
-  specific_attr_iterator() : Current() { }
-  explicit specific_attr_iterator(Iterator i) : Current(i) { }
-
-  reference operator*() const {
-    AdvanceToNext();
-    return cast<SpecificAttr>(*Current);
-  }
-  pointer operator->() const {
-    AdvanceToNext();
-    return cast<SpecificAttr>(*Current);
-  }
-
-  specific_attr_iterator& operator++() {
-    ++Current;
-    return *this;
-  }
-  specific_attr_iterator operator++(int) {
-    specific_attr_iterator Tmp(*this);
-    ++(*this);
-    return Tmp;
-  }
-
-  friend bool operator==(specific_attr_iterator Left,
-                         specific_attr_iterator Right) {
-    if (Left.Current < Right.Current)
-      Left.AdvanceToNext(Right.Current); 
-    else
-      Right.AdvanceToNext(Left.Current);
-    return Left.Current == Right.Current;
-  }
-  friend bool operator!=(specific_attr_iterator Left,
-                         specific_attr_iterator Right) {
-    return !(Left == Right);
+  // Implement isa/cast/dyncast/etc.
+  static bool classof(const Attr *A) {
+    // Relies on relative order of enum emission with respect to param attrs.
+    return (A->getKind() <= attr::LAST_MS_INHERITABLE &&
+            A->getKind() > attr::LAST_INHERITABLE_PARAM);
   }
 };
 
-template <typename SpecificAttr, typename Container>
-inline specific_attr_iterator<SpecificAttr, Container>
-          specific_attr_begin(const Container& container) {
-  return specific_attr_iterator<SpecificAttr, Container>(container.begin());
-}
-template <typename SpecificAttr, typename Container>
-inline specific_attr_iterator<SpecificAttr, Container>
-          specific_attr_end(const Container& container) {
-  return specific_attr_iterator<SpecificAttr, Container>(container.end());
-}
-
-template <typename SpecificAttr, typename Container>
-inline bool hasSpecificAttr(const Container& container) {
-  return specific_attr_begin<SpecificAttr>(container) !=
-          specific_attr_end<SpecificAttr>(container);
-}
-template <typename SpecificAttr, typename Container>
-inline SpecificAttr *getSpecificAttr(const Container& container) {
-  specific_attr_iterator<SpecificAttr, Container> i =
-      specific_attr_begin<SpecificAttr>(container);
-  if (i != specific_attr_end<SpecificAttr>(container))
-    return *i;
-  else
-    return 0;
-}
-
-/// getMaxAlignment - Returns the highest alignment value found among
-/// AlignedAttrs in an AttrVec, or 0 if there are none.
-inline unsigned getMaxAttrAlignment(const AttrVec& V, ASTContext &Ctx) {
-  unsigned Align = 0;
-  specific_attr_iterator<AlignedAttr> i(V.begin()), e(V.end());
-  for(; i != e; ++i)
-    Align = std::max(Align, i->getAlignment(Ctx));
-  return Align;
-}
+#include "clang/AST/Attrs.inc"
 
 }  // end namespace clang
 
diff --git a/include/clang/AST/AttrIterator.h b/include/clang/AST/AttrIterator.h
new file mode 100644
index 0000000..8bd8fbe
--- /dev/null
+++ b/include/clang/AST/AttrIterator.h
@@ -0,0 +1,142 @@
+//===--- AttrIterator.h - Classes for attribute iteration -------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file defines the Attr vector and specific_attr_iterator interfaces.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_AST_ATTRITERATOR_H
+#define LLVM_CLANG_AST_ATTRITERATOR_H
+
+#include "clang/Basic/LLVM.h"
+#include <iterator>
+
+namespace clang {
+  class ASTContext;
+  class Attr;
+}
+
+// Defined in ASTContext.h
+void *operator new(size_t Bytes, const clang::ASTContext &C,
+                   size_t Alignment = 16);
+// FIXME: Being forced to not have a default argument here due to redeclaration
+//        rules on default arguments sucks
+void *operator new[](size_t Bytes, const clang::ASTContext &C,
+                     size_t Alignment);
+
+// It is good practice to pair new/delete operators.  Also, MSVC gives many
+// warnings if a matching delete overload is not declared, even though the
+// throw() spec guarantees it will not be implicitly called.
+void operator delete(void *Ptr, const clang::ASTContext &C, size_t);
+void operator delete[](void *Ptr, const clang::ASTContext &C, size_t);
+
+namespace clang {
+
+/// AttrVec - A vector of Attr, which is how they are stored on the AST.
+typedef SmallVector<Attr*, 2> AttrVec;
+typedef SmallVector<const Attr*, 2> ConstAttrVec;
+
+/// specific_attr_iterator - Iterates over a subrange of an AttrVec, only
+/// providing attributes that are of a specifc type.
+template <typename SpecificAttr, typename Container = AttrVec>
+class specific_attr_iterator {
+  typedef typename Container::const_iterator Iterator;
+
+  /// Current - The current, underlying iterator.
+  /// In order to ensure we don't dereference an invalid iterator unless
+  /// specifically requested, we don't necessarily advance this all the
+  /// way. Instead, we advance it when an operation is requested; if the
+  /// operation is acting on what should be a past-the-end iterator,
+  /// then we offer no guarantees, but this way we do not dererence a
+  /// past-the-end iterator when we move to a past-the-end position.
+  mutable Iterator Current;
+
+  void AdvanceToNext() const {
+    while (!isa<SpecificAttr>(*Current))
+      ++Current;
+  }
+
+  void AdvanceToNext(Iterator I) const {
+    while (Current != I && !isa<SpecificAttr>(*Current))
+      ++Current;
+  }
+
+public:
+  typedef SpecificAttr*             value_type;
+  typedef SpecificAttr*             reference;
+  typedef SpecificAttr*             pointer;
+  typedef std::forward_iterator_tag iterator_category;
+  typedef std::ptrdiff_t            difference_type;
+
+  specific_attr_iterator() : Current() { }
+  explicit specific_attr_iterator(Iterator i) : Current(i) { }
+
+  reference operator*() const {
+    AdvanceToNext();
+    return cast<SpecificAttr>(*Current);
+  }
+  pointer operator->() const {
+    AdvanceToNext();
+    return cast<SpecificAttr>(*Current);
+  }
+
+  specific_attr_iterator& operator++() {
+    ++Current;
+    return *this;
+  }
+  specific_attr_iterator operator++(int) {
+    specific_attr_iterator Tmp(*this);
+    ++(*this);
+    return Tmp;
+  }
+
+  friend bool operator==(specific_attr_iterator Left,
+                         specific_attr_iterator Right) {
+    assert((Left.Current == 0) == (Right.Current == 0));
+    if (Left.Current < Right.Current)
+      Left.AdvanceToNext(Right.Current); 
+    else
+      Right.AdvanceToNext(Left.Current);
+    return Left.Current == Right.Current;
+  }
+  friend bool operator!=(specific_attr_iterator Left,
+                         specific_attr_iterator Right) {
+    return !(Left == Right);
+  }
+};
+
+template <typename SpecificAttr, typename Container>
+inline specific_attr_iterator<SpecificAttr, Container>
+          specific_attr_begin(const Container& container) {
+  return specific_attr_iterator<SpecificAttr, Container>(container.begin());
+}
+template <typename SpecificAttr, typename Container>
+inline specific_attr_iterator<SpecificAttr, Container>
+          specific_attr_end(const Container& container) {
+  return specific_attr_iterator<SpecificAttr, Container>(container.end());
+}
+
+template <typename SpecificAttr, typename Container>
+inline bool hasSpecificAttr(const Container& container) {
+  return specific_attr_begin<SpecificAttr>(container) !=
+          specific_attr_end<SpecificAttr>(container);
+}
+template <typename SpecificAttr, typename Container>
+inline SpecificAttr *getSpecificAttr(const Container& container) {
+  specific_attr_iterator<SpecificAttr, Container> i =
+      specific_attr_begin<SpecificAttr>(container);
+  if (i != specific_attr_end<SpecificAttr>(container))
+    return *i;
+  else
+    return 0;
+}
+
+}  // end namespace clang
+
+#endif
diff --git a/include/clang/AST/BuiltinTypes.def b/include/clang/AST/BuiltinTypes.def
index ba322fb..488cace 100644
--- a/include/clang/AST/BuiltinTypes.def
+++ b/include/clang/AST/BuiltinTypes.def
@@ -154,6 +154,20 @@ BUILTIN_TYPE(ObjCClass, ObjCBuiltinClassTy)
 // type is a typedef of a PointerType to this.
 BUILTIN_TYPE(ObjCSel, ObjCBuiltinSelTy)
 
+// OpenCL image types.
+BUILTIN_TYPE(OCLImage1d, OCLImage1dTy)
+BUILTIN_TYPE(OCLImage1dArray, OCLImage1dArrayTy)
+BUILTIN_TYPE(OCLImage1dBuffer, OCLImage1dBufferTy)
+BUILTIN_TYPE(OCLImage2d, OCLImage2dTy)
+BUILTIN_TYPE(OCLImage2dArray, OCLImage2dArrayTy)
+BUILTIN_TYPE(OCLImage3d, OCLImage3dTy)
+
+// OpenCL sampler_t.
+BUILTIN_TYPE(OCLSampler, OCLSamplerTy)
+
+// OpenCL event_t.
+BUILTIN_TYPE(OCLEvent, OCLEventTy)
+
 // This represents the type of an expression whose type is
 // totally unknown, e.g. 'T::foo'.  It is permitted for this to
 // appear in situations where the structure of the type is
diff --git a/include/clang/AST/CMakeLists.txt b/include/clang/AST/CMakeLists.txt
index 4c4c0fb..ba54fa2 100644
--- a/include/clang/AST/CMakeLists.txt
+++ b/include/clang/AST/CMakeLists.txt
@@ -8,6 +8,11 @@ clang_tablegen(AttrImpl.inc -gen-clang-attr-impl
   SOURCE ../Basic/Attr.td
   TARGET ClangAttrImpl)
 
+clang_tablegen(AttrDump.inc -gen-clang-attr-dump
+  -I ${CMAKE_CURRENT_SOURCE_DIR}/../../
+  SOURCE ../Basic/Attr.td
+  TARGET ClangAttrDump)
+
 clang_tablegen(StmtNodes.inc -gen-clang-stmt-nodes
   SOURCE ../Basic/StmtNodes.td
   TARGET ClangStmtNodes)
@@ -28,7 +33,15 @@ clang_tablegen(CommentHTMLTagsProperties.inc -gen-clang-comment-html-tags-proper
   SOURCE CommentHTMLTags.td
   TARGET ClangCommentHTMLTagsProperties)
 
+clang_tablegen(CommentHTMLNamedCharacterReferences.inc -gen-clang-comment-html-named-character-references
+  SOURCE CommentHTMLNamedCharacterReferences.td
+  TARGET ClangCommentHTMLNamedCharacterReferences)
+
 clang_tablegen(CommentCommandInfo.inc -gen-clang-comment-command-info
   SOURCE CommentCommands.td
   TARGET ClangCommentCommandInfo)
 
+clang_tablegen(CommentCommandList.inc -gen-clang-comment-command-list
+  SOURCE CommentCommands.td
+  TARGET ClangCommentCommandList)
+
diff --git a/include/clang/AST/CXXInheritance.h b/include/clang/AST/CXXInheritance.h
index 87bdbe0..2983e04 100644
--- a/include/clang/AST/CXXInheritance.h
+++ b/include/clang/AST/CXXInheritance.h
@@ -14,17 +14,17 @@
 #ifndef LLVM_CLANG_AST_CXXINHERITANCE_H
 #define LLVM_CLANG_AST_CXXINHERITANCE_H
 
-#include "clang/AST/DeclarationName.h"
 #include "clang/AST/DeclBase.h"
 #include "clang/AST/DeclCXX.h"
+#include "clang/AST/DeclarationName.h"
 #include "clang/AST/Type.h"
 #include "clang/AST/TypeOrdering.h"
 #include "llvm/ADT/MapVector.h"
 #include "llvm/ADT/SmallSet.h"
 #include "llvm/ADT/SmallVector.h"
+#include <cassert>
 #include <list>
 #include <map>
-#include <cassert>
 
 namespace clang {
   
diff --git a/include/clang/AST/CanonicalType.h b/include/clang/AST/CanonicalType.h
index ea307bf..9460757 100644
--- a/include/clang/AST/CanonicalType.h
+++ b/include/clang/AST/CanonicalType.h
@@ -351,15 +351,12 @@ namespace llvm {
 /// CanQual<T> to a specific Type class. We're prefer isa/dyn_cast/cast/etc.
 /// to return smart pointer (proxies?).
 template<typename T>
-struct simplify_type<const ::clang::CanQual<T> > {
+struct simplify_type< ::clang::CanQual<T> > {
   typedef const T *SimpleType;
-  static SimpleType getSimplifiedValue(const ::clang::CanQual<T> &Val) {
+  static SimpleType getSimplifiedValue(::clang::CanQual<T> Val) {
     return Val.getTypePtr();
   }
 };
-template<typename T>
-struct simplify_type< ::clang::CanQual<T> >
-: public simplify_type<const ::clang::CanQual<T> > {};
 
 // Teach SmallPtrSet that CanQual<T> is "basically a pointer".
 template<typename T>
@@ -514,55 +511,13 @@ struct CanProxyAdaptor<MemberPointerType>
   LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(const Type *, getClass)
 };
 
-template<>
-struct CanProxyAdaptor<ArrayType> : public CanProxyBase<ArrayType> {
-  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getElementType)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(ArrayType::ArraySizeModifier,
-                                      getSizeModifier)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(Qualifiers, getIndexTypeQualifiers)
-};
-
-template<>
-struct CanProxyAdaptor<ConstantArrayType>
-  : public CanProxyBase<ConstantArrayType> {
-  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getElementType)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(ArrayType::ArraySizeModifier,
-                                      getSizeModifier)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(Qualifiers, getIndexTypeQualifiers)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(const llvm::APInt &, getSize)
-};
-
-template<>
-struct CanProxyAdaptor<IncompleteArrayType>
-  : public CanProxyBase<IncompleteArrayType> {
-  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getElementType)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(ArrayType::ArraySizeModifier,
-                                      getSizeModifier)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(Qualifiers, getIndexTypeQualifiers)
-};
-
-template<>
-struct CanProxyAdaptor<VariableArrayType>
-  : public CanProxyBase<VariableArrayType> {
-  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getElementType)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(ArrayType::ArraySizeModifier,
-                                      getSizeModifier)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(Qualifiers, getIndexTypeQualifiers)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(Expr *, getSizeExpr)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(SourceRange, getBracketsRange)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(SourceLocation, getLBracketLoc)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(SourceLocation, getRBracketLoc)
-};
-
-template<>
-struct CanProxyAdaptor<DependentSizedArrayType>
-  : public CanProxyBase<DependentSizedArrayType> {
-  LLVM_CLANG_CANPROXY_TYPE_ACCESSOR(getElementType)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(Expr *, getSizeExpr)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(SourceRange, getBracketsRange)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(SourceLocation, getLBracketLoc)
-  LLVM_CLANG_CANPROXY_SIMPLE_ACCESSOR(SourceLocation, getRBracketLoc)
-};
+// CanProxyAdaptors for arrays are intentionally unimplemented because
+// they are not safe.
+template<> struct CanProxyAdaptor<ArrayType>;
+template<> struct CanProxyAdaptor<ConstantArrayType>;
+template<> struct CanProxyAdaptor<IncompleteArrayType>;
+template<> struct CanProxyAdaptor<VariableArrayType>;
+template<> struct CanProxyAdaptor<DependentSizedArrayType>;
 
 template<>
 struct CanProxyAdaptor<DependentSizedExtVectorType>
@@ -746,6 +701,9 @@ CanQual<T> CanQual<T>::CreateUnsafe(QualType Other) {
 template<typename T>
 template<typename U>
 CanProxy<U> CanQual<T>::getAs() const {
+  ArrayType_cannot_be_used_with_getAs<U> at;
+  (void)at;
+
   if (Stored.isNull())
     return CanProxy<U>();
 
@@ -758,6 +716,9 @@ CanProxy<U> CanQual<T>::getAs() const {
 template<typename T>
 template<typename U>
 CanProxy<U> CanQual<T>::castAs() const {
+  ArrayType_cannot_be_used_with_getAs<U> at;
+  (void)at;
+
   assert(!Stored.isNull() && isa<U>(Stored.getTypePtr()));
   return CanQual<U>::CreateUnsafe(Stored);
 }
diff --git a/include/clang/AST/CharUnits.h b/include/clang/AST/CharUnits.h
index 12e74b3..082c672 100644
--- a/include/clang/AST/CharUnits.h
+++ b/include/clang/AST/CharUnits.h
@@ -171,6 +171,17 @@ namespace clang {
                                                   Align.Quantity));
       }
 
+      /// Given that this is a non-zero alignment value, what is the
+      /// alignment at the given offset?
+      CharUnits alignmentAtOffset(CharUnits offset) {
+        // alignment: 0010000
+        // offset:    1011100
+        // lowBits:   0001011
+        // result:    0000100
+        QuantityType lowBits = (Quantity-1) & (offset.Quantity-1);
+        return CharUnits((lowBits + 1) & ~lowBits);
+      }
+
 
   }; // class CharUnit
 } // namespace clang
diff --git a/include/clang/AST/Comment.h b/include/clang/AST/Comment.h
index 316a180..c02a82f 100644
--- a/include/clang/AST/Comment.h
+++ b/include/clang/AST/Comment.h
@@ -14,10 +14,10 @@
 #ifndef LLVM_CLANG_AST_COMMENT_H
 #define LLVM_CLANG_AST_COMMENT_H
 
-#include "clang/Basic/SourceLocation.h"
-#include "clang/AST/Type.h"
 #include "clang/AST/CommentCommandTraits.h"
 #include "clang/AST/DeclObjC.h"
+#include "clang/AST/Type.h"
+#include "clang/Basic/SourceLocation.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/StringRef.h"
 
@@ -28,6 +28,26 @@ class TemplateParameterList;
 
 namespace comments {
 class FullComment;
+
+/// Describes the syntax that was used in a documentation command.
+///
+/// Exact values of this enumeration are important because they used to select
+/// parts of diagnostic messages.  Audit diagnostics before changing or adding
+/// a new value.
+enum CommandMarkerKind {
+  /// Command started with a backslash character:
+  /// \code
+  ///   \foo
+  /// \endcode
+  CMK_Backslash = 0,
+
+  /// Command started with an 'at' character:
+  /// \code
+  ///   @foo
+  /// \endcode
+  CMK_At = 1
+};
+
 /// Any part of the comment.
 /// Abstract class.
 class Comment {
@@ -110,8 +130,12 @@ protected:
     unsigned : NumCommentBits;
 
     unsigned CommandID : 8;
+
+    /// Describes the syntax that was used in a documentation command.
+    /// Contains values from CommandMarkerKind enum.
+    unsigned CommandMarker : 1;
   };
-  enum { NumBlockCommandCommentBits = NumCommentBits + 8 };
+  enum { NumBlockCommandCommentBits = NumCommentBits + 9 };
 
   class ParamCommandCommentBitfields {
     friend class ParamCommandComment;
@@ -171,8 +195,9 @@ public:
   const char *getCommentKindName() const;
 
   LLVM_ATTRIBUTE_USED void dump() const;
+  LLVM_ATTRIBUTE_USED void dumpColor() const;
   LLVM_ATTRIBUTE_USED void dump(const ASTContext &Context) const;
-  void dump(llvm::raw_ostream &OS, const CommandTraits *Traits,
+  void dump(raw_ostream &OS, const CommandTraits *Traits,
             const SourceManager *SM) const;
 
   SourceRange getSourceRange() const LLVM_READONLY { return Range; }
@@ -282,14 +307,14 @@ public:
 
 protected:
   /// Command arguments.
-  llvm::ArrayRef<Argument> Args;
+  ArrayRef<Argument> Args;
 
 public:
   InlineCommandComment(SourceLocation LocBegin,
                        SourceLocation LocEnd,
                        unsigned CommandID,
                        RenderKind RK,
-                       llvm::ArrayRef<Argument> Args) :
+                       ArrayRef<Argument> Args) :
       InlineContentComment(InlineCommandCommentKind, LocBegin, LocEnd),
       Args(Args) {
     InlineCommandCommentBits.RenderKind = RK;
@@ -504,10 +529,10 @@ public:
 
 /// A single paragraph that contains inline content.
 class ParagraphComment : public BlockContentComment {
-  llvm::ArrayRef<InlineContentComment *> Content;
+  ArrayRef<InlineContentComment *> Content;
 
 public:
-  ParagraphComment(llvm::ArrayRef<InlineContentComment *> Content) :
+  ParagraphComment(ArrayRef<InlineContentComment *> Content) :
       BlockContentComment(ParagraphCommentKind,
                           SourceLocation(),
                           SourceLocation()),
@@ -565,7 +590,7 @@ public:
 
 protected:
   /// Word-like arguments.
-  llvm::ArrayRef<Argument> Args;
+  ArrayRef<Argument> Args;
 
   /// Paragraph argument.
   ParagraphComment *Paragraph;
@@ -573,21 +598,25 @@ protected:
   BlockCommandComment(CommentKind K,
                       SourceLocation LocBegin,
                       SourceLocation LocEnd,
-                      unsigned CommandID) :
+                      unsigned CommandID,
+                      CommandMarkerKind CommandMarker) :
       BlockContentComment(K, LocBegin, LocEnd),
       Paragraph(NULL) {
     setLocation(getCommandNameBeginLoc());
     BlockCommandCommentBits.CommandID = CommandID;
+    BlockCommandCommentBits.CommandMarker = CommandMarker;
   }
 
 public:
   BlockCommandComment(SourceLocation LocBegin,
                       SourceLocation LocEnd,
-                      unsigned CommandID) :
+                      unsigned CommandID,
+                      CommandMarkerKind CommandMarker) :
       BlockContentComment(BlockCommandCommentKind, LocBegin, LocEnd),
       Paragraph(NULL) {
     setLocation(getCommandNameBeginLoc());
     BlockCommandCommentBits.CommandID = CommandID;
+    BlockCommandCommentBits.CommandMarker = CommandMarker;
   }
 
   static bool classof(const Comment *C) {
@@ -633,7 +662,7 @@ public:
     return Args[Idx].Range;
   }
 
-  void setArgs(llvm::ArrayRef<Argument> A) {
+  void setArgs(ArrayRef<Argument> A) {
     Args = A;
     if (Args.size() > 0) {
       SourceLocation NewLocEnd = Args.back().Range.getEnd();
@@ -656,6 +685,11 @@ public:
     if (NewLocEnd.isValid())
       setSourceRange(SourceRange(getLocStart(), NewLocEnd));
   }
+
+  CommandMarkerKind getCommandMarker() const LLVM_READONLY {
+    return static_cast<CommandMarkerKind>(
+        BlockCommandCommentBits.CommandMarker);
+  }
 };
 
 /// Doxygen \\param command.
@@ -669,9 +703,10 @@ public:
 
   ParamCommandComment(SourceLocation LocBegin,
                       SourceLocation LocEnd,
-                      unsigned CommandID) :
+                      unsigned CommandID,
+                      CommandMarkerKind CommandMarker) :
       BlockCommandComment(ParamCommandCommentKind, LocBegin, LocEnd,
-                          CommandID),
+                          CommandID, CommandMarker),
       ParamIndex(InvalidParamIndex) {
     ParamCommandCommentBits.Direction = In;
     ParamCommandCommentBits.IsDirectionExplicit = false;
@@ -746,13 +781,15 @@ private:
   /// For C:  Position = { 0 }
   /// For TT: Position = { 1 }
   /// For T:  Position = { 1, 0 }
-  llvm::ArrayRef<unsigned> Position;
+  ArrayRef<unsigned> Position;
 
 public:
   TParamCommandComment(SourceLocation LocBegin,
                        SourceLocation LocEnd,
-                       unsigned CommandID) :
-      BlockCommandComment(TParamCommandCommentKind, LocBegin, LocEnd, CommandID)
+                       unsigned CommandID,
+                       CommandMarkerKind CommandMarker) :
+      BlockCommandComment(TParamCommandCommentKind, LocBegin, LocEnd, CommandID,
+                          CommandMarker)
   { }
 
   static bool classof(const Comment *C) {
@@ -826,14 +863,15 @@ class VerbatimBlockComment : public BlockCommandComment {
 protected:
   StringRef CloseName;
   SourceLocation CloseNameLocBegin;
-  llvm::ArrayRef<VerbatimBlockLineComment *> Lines;
+  ArrayRef<VerbatimBlockLineComment *> Lines;
 
 public:
   VerbatimBlockComment(SourceLocation LocBegin,
                        SourceLocation LocEnd,
                        unsigned CommandID) :
       BlockCommandComment(VerbatimBlockCommentKind,
-                          LocBegin, LocEnd, CommandID)
+                          LocBegin, LocEnd, CommandID,
+                          CMK_At) // FIXME: improve source fidelity.
   { }
 
   static bool classof(const Comment *C) {
@@ -853,7 +891,7 @@ public:
     CloseNameLocBegin = LocBegin;
   }
 
-  void setLines(llvm::ArrayRef<VerbatimBlockLineComment *> L) {
+  void setLines(ArrayRef<VerbatimBlockLineComment *> L) {
     Lines = L;
   }
 
@@ -886,7 +924,8 @@ public:
                       StringRef Text) :
       BlockCommandComment(VerbatimLineCommentKind,
                           LocBegin, LocEnd,
-                          CommandID),
+                          CommandID,
+                          CMK_At), // FIXME: improve source fidelity.
       Text(Text),
       TextBegin(TextBegin)
   { }
@@ -1021,11 +1060,11 @@ struct DeclInfo {
 
 /// A full comment attached to a declaration, contains block content.
 class FullComment : public Comment {
-  llvm::ArrayRef<BlockContentComment *> Blocks;
+  ArrayRef<BlockContentComment *> Blocks;
   DeclInfo *ThisDeclInfo;
 
 public:
-  FullComment(llvm::ArrayRef<BlockContentComment *> Blocks, DeclInfo *D) :
+  FullComment(ArrayRef<BlockContentComment *> Blocks, DeclInfo *D) :
       Comment(FullCommentKind, SourceLocation(), SourceLocation()),
       Blocks(Blocks), ThisDeclInfo(D) {
     if (Blocks.empty())
@@ -1062,7 +1101,7 @@ public:
     return ThisDeclInfo;
   }
   
-  llvm::ArrayRef<BlockContentComment *> getBlocks() const { return Blocks; }
+  ArrayRef<BlockContentComment *> getBlocks() const { return Blocks; }
   
 };
 } // end namespace comments
diff --git a/include/clang/AST/CommentCommandTraits.h b/include/clang/AST/CommentCommandTraits.h
index 6d44c70..d1f5209 100644
--- a/include/clang/AST/CommentCommandTraits.h
+++ b/include/clang/AST/CommentCommandTraits.h
@@ -16,9 +16,10 @@
 #ifndef LLVM_CLANG_AST_COMMENT_COMMAND_TRAITS_H
 #define LLVM_CLANG_AST_COMMENT_COMMAND_TRAITS_H
 
+#include "clang/Basic/CommentOptions.h"
 #include "clang/Basic/LLVM.h"
-#include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
 #include "llvm/Support/Allocator.h"
 #include "llvm/Support/ErrorHandling.h"
 
@@ -69,6 +70,9 @@ struct CommandInfo {
   /// True if this command is \\deprecated or an alias.
   unsigned IsDeprecatedCommand : 1;
 
+  /// \brief True if this is a \\headerfile-like command.
+  unsigned IsHeaderfileCommand : 1;
+
   /// True if we don't want to warn about this command being passed an empty
   /// paragraph.  Meaningful only for block commands.
   unsigned IsEmptyParagraphAllowed : 1;
@@ -96,7 +100,17 @@ struct CommandInfo {
   ///   \fn void f(int a);
   /// \endcode
   unsigned IsDeclarationCommand : 1;
-
+  
+  /// \brief True if verbatim-like line command is a function declaration.
+  unsigned IsFunctionDeclarationCommand : 1;
+
+  /// \brief True if block command is further describing a container API; such
+  /// as \@coclass, \@classdesign, etc.
+  unsigned IsRecordLikeDetailCommand : 1;
+  
+  /// \brief True if block command is a container API; such as \@interface.
+  unsigned IsRecordLikeDeclarationCommand : 1;
+  
   /// \brief True if this command is unknown.  This \c CommandInfo object was
   /// created during parsing.
   unsigned IsUnknownCommand : 1;
@@ -106,7 +120,17 @@ struct CommandInfo {
 /// in comments.
 class CommandTraits {
 public:
-  CommandTraits(llvm::BumpPtrAllocator &Allocator);
+  enum KnownCommandIDs {
+#define COMMENT_COMMAND(NAME) KCI_##NAME,
+#include "clang/AST/CommentCommandList.inc"
+#undef COMMENT_COMMAND
+    KCI_Last
+  };
+
+  CommandTraits(llvm::BumpPtrAllocator &Allocator,
+                const CommentOptions &CommentOptions);
+
+  void registerCommentOptions(const CommentOptions &CommentOptions);
 
   /// \returns a CommandInfo object for a given command name or
   /// NULL if no CommandInfo object exists for this command.
@@ -122,6 +146,8 @@ public:
 
   const CommandInfo *registerUnknownCommand(StringRef CommandName);
 
+  const CommandInfo *registerBlockCommand(StringRef CommandName);
+
   /// \returns a CommandInfo object for a given command name or
   /// NULL if \c Name is not a builtin command.
   static const CommandInfo *getBuiltinCommandInfo(StringRef Name);
@@ -137,6 +163,8 @@ private:
   const CommandInfo *getRegisteredCommandInfo(StringRef Name) const;
   const CommandInfo *getRegisteredCommandInfo(unsigned CommandID) const;
 
+  CommandInfo *createCommandInfoWithName(StringRef CommandName);
+
   unsigned NextID;
 
   /// Allocator for CommandInfo objects.
diff --git a/include/clang/AST/CommentCommands.td b/include/clang/AST/CommentCommands.td
index 3d8bad8..9587ace 100644
--- a/include/clang/AST/CommentCommands.td
+++ b/include/clang/AST/CommentCommands.td
@@ -1,3 +1,7 @@
+//===----------------------------------------------------------------------===//
+// Define command classes.
+//===----------------------------------------------------------------------===//
+
 class Command<string name> {
   string Name = name;
   string EndCommandName = "";
@@ -12,6 +16,7 @@ class Command<string name> {
   bit IsParamCommand = 0;
   bit IsTParamCommand = 0;
   bit IsDeprecatedCommand = 0;
+  bit IsHeaderfileCommand = 0;
 
   bit IsEmptyParagraphAllowed = 0;
 
@@ -19,6 +24,9 @@ class Command<string name> {
   bit IsVerbatimBlockEndCommand = 0;
   bit IsVerbatimLineCommand = 0;
   bit IsDeclarationCommand = 0;
+  bit IsFunctionDeclarationCommand = 0;
+  bit IsRecordLikeDetailCommand = 0;
+  bit IsRecordLikeDeclarationCommand = 0;
 }
 
 class InlineCommand<string name> : Command<name> {
@@ -29,6 +37,10 @@ class BlockCommand<string name> : Command<name> {
   let IsBlockCommand = 1;
 }
 
+class RecordLikeDetailCommand<string name> : BlockCommand<name> {
+  let IsRecordLikeDetailCommand = 1;
+}
+
 class VerbatimBlockCommand<string name> : Command<name> {
   let EndCommandName = name;
   let IsVerbatimBlockCommand = 1;
@@ -54,6 +66,22 @@ class DeclarationVerbatimLineCommand<string name> :
   let IsDeclarationCommand = 1;
 }
 
+class FunctionDeclarationVerbatimLineCommand<string name> :
+      VerbatimLineCommand<name> {
+  let IsDeclarationCommand = 1;
+  let IsFunctionDeclarationCommand = 1;
+}
+
+class RecordLikeDeclarationVerbatimLineCommand<string name> :
+      VerbatimLineCommand<name> {
+  let IsDeclarationCommand = 1;
+  let IsRecordLikeDeclarationCommand = 1;
+}
+
+//===----------------------------------------------------------------------===//
+// InlineCommand
+//===----------------------------------------------------------------------===//
+
 def B  : InlineCommand<"b">;
 def C  : InlineCommand<"c">;
 def P  : InlineCommand<"p">;
@@ -61,19 +89,26 @@ def A  : InlineCommand<"a">;
 def E  : InlineCommand<"e">;
 def Em : InlineCommand<"em">;
 
+//===----------------------------------------------------------------------===//
+// BlockCommand
+//===----------------------------------------------------------------------===//
+
 def Brief : BlockCommand<"brief"> { let IsBriefCommand = 1; }
 def Short : BlockCommand<"short"> { let IsBriefCommand = 1; }
 
+// Opposite of \brief, it is the default in our implementation.
+def Details : BlockCommand<"details">;
+
 def Returns : BlockCommand<"returns"> { let IsReturnsCommand = 1; }
 def Return  : BlockCommand<"return"> { let IsReturnsCommand = 1; }
 def Result  : BlockCommand<"result"> { let IsReturnsCommand = 1; }
 
 def Param : BlockCommand<"param"> { let IsParamCommand = 1; }
 
-// Doxygen
+// Doxygen command for template parameter documentation.
 def Tparam : BlockCommand<"tparam"> { let IsTParamCommand = 1; }
 
-// HeaderDoc
+// HeaderDoc command for template parameter documentation.
 def Templatefield : BlockCommand<"templatefield"> { let IsTParamCommand = 1; }
 
 def Deprecated : BlockCommand<"deprecated"> {
@@ -81,12 +116,17 @@ def Deprecated : BlockCommand<"deprecated"> {
   let IsDeprecatedCommand = 1;
 }
 
+def Headerfile : BlockCommand<"headerfile"> { let IsHeaderfileCommand = 1; }
+
+// We don't do any additional semantic analysis for the following
+// BlockCommands.  It might be a good idea to do something extra for them, but
+// for now we model them as plain BlockCommands.
+def Attention  : BlockCommand<"attention">;
 def Author     : BlockCommand<"author">;
 def Authors    : BlockCommand<"authors">;
 def Bug        : BlockCommand<"bug">;
 def Copyright  : BlockCommand<"copyright">;
 def Date       : BlockCommand<"date">;
-def Details    : BlockCommand<"details">;
 def Invariant  : BlockCommand<"invariant">;
 def Note       : BlockCommand<"note">;
 def Post       : BlockCommand<"post">;
@@ -99,6 +139,22 @@ def Since      : BlockCommand<"since">;
 def Todo       : BlockCommand<"todo">;
 def Version    : BlockCommand<"version">;
 def Warning    : BlockCommand<"warning">;
+// HeaderDoc commands
+def ClassDesign   : RecordLikeDetailCommand<"classdesign">;
+def CoClass       : RecordLikeDetailCommand<"coclass">;
+def Dependency    : RecordLikeDetailCommand<"dependency">;
+def Helper        : RecordLikeDetailCommand<"helper">;
+def HelperClass   : RecordLikeDetailCommand<"helperclass">;
+def Helps         : RecordLikeDetailCommand<"helps">;
+def InstanceSize  : RecordLikeDetailCommand<"instancesize">;
+def Ownership     : RecordLikeDetailCommand<"ownership">;
+def Performance   : RecordLikeDetailCommand<"performance">;
+def Security      : RecordLikeDetailCommand<"security">;
+def SuperClass    : RecordLikeDetailCommand<"superclass">;
+
+//===----------------------------------------------------------------------===//
+// VerbatimBlockCommand
+//===----------------------------------------------------------------------===//
 
 defm Code      : VerbatimBlockCommand<"code", "endcode">;
 defm Verbatim  : VerbatimBlockCommand<"verbatim", "endverbatim">;
@@ -111,11 +167,16 @@ defm Rtfonly   : VerbatimBlockCommand<"rtfonly", "endrtfonly">;
 defm Dot : VerbatimBlockCommand<"dot", "enddot">;
 defm Msc : VerbatimBlockCommand<"msc", "endmsc">;
 
-// These commands have special support in lexer.
+// These three commands have special support in CommentLexer to recognize their
+// names.
 def  FDollar  : VerbatimBlockCommand<"f$">; // Inline LaTeX formula
 defm FBracket : VerbatimBlockCommand<"f[", "f]">; // Displayed LaTeX formula
 defm FBrace   : VerbatimBlockCommand<"f{", "f}">; // LaTeX environment
 
+//===----------------------------------------------------------------------===//
+// VerbatimLineCommand
+//===----------------------------------------------------------------------===//
+
 def Defgroup   : VerbatimLineCommand<"defgroup">;
 def Ingroup    : VerbatimLineCommand<"ingroup">;
 def Addtogroup : VerbatimLineCommand<"addtogroup">;
@@ -131,6 +192,10 @@ def Mainpage : VerbatimLineCommand<"mainpage">;
 def Subpage  : VerbatimLineCommand<"subpage">;
 def Ref      : VerbatimLineCommand<"ref">;
 
+//===----------------------------------------------------------------------===//
+// DeclarationVerbatimLineCommand
+//===----------------------------------------------------------------------===//
+
 // Doxygen commands.
 def Fn        : DeclarationVerbatimLineCommand<"fn">;
 def Namespace : DeclarationVerbatimLineCommand<"namespace">;
@@ -140,17 +205,18 @@ def Typedef   : DeclarationVerbatimLineCommand<"typedef">;
 def Var       : DeclarationVerbatimLineCommand<"var">;
 
 // HeaderDoc commands.
-def Class     : DeclarationVerbatimLineCommand<"class">;
-def Interface : DeclarationVerbatimLineCommand<"interface">;
-def Protocol  : DeclarationVerbatimLineCommand<"protocol">;
+def Class     : RecordLikeDeclarationVerbatimLineCommand<"class">;
+def Interface : RecordLikeDeclarationVerbatimLineCommand<"interface">;
+def Protocol  : RecordLikeDeclarationVerbatimLineCommand<"protocol">;
+def Struct    : RecordLikeDeclarationVerbatimLineCommand<"struct">;
+def Union     : RecordLikeDeclarationVerbatimLineCommand<"union">;
 def Category  : DeclarationVerbatimLineCommand<"category">;
 def Template  : DeclarationVerbatimLineCommand<"template">;
-def Function  : DeclarationVerbatimLineCommand<"function">;
-def Method    : DeclarationVerbatimLineCommand<"method">;
-def Callback  : DeclarationVerbatimLineCommand<"callback">;
+def Function  : FunctionDeclarationVerbatimLineCommand<"function">;
+def FunctionGroup  : FunctionDeclarationVerbatimLineCommand<"functiongroup">;
+def Method    : FunctionDeclarationVerbatimLineCommand<"method">;
+def MethodGroup    : FunctionDeclarationVerbatimLineCommand<"methodgroup">;
+def Callback  : FunctionDeclarationVerbatimLineCommand<"callback">;
 def Const     : DeclarationVerbatimLineCommand<"const">;
 def Constant  : DeclarationVerbatimLineCommand<"constant">;
-def Struct    : DeclarationVerbatimLineCommand<"struct">;
-def Union     : DeclarationVerbatimLineCommand<"union">;
 def Enum      : DeclarationVerbatimLineCommand<"enum">;
-
diff --git a/include/clang/AST/CommentHTMLNamedCharacterReferences.td b/include/clang/AST/CommentHTMLNamedCharacterReferences.td
new file mode 100644
index 0000000..4493108
--- /dev/null
+++ b/include/clang/AST/CommentHTMLNamedCharacterReferences.td
@@ -0,0 +1,177 @@
+// HTML Named Character Reference
+class NCR<string spelling, int codePoint> {
+  string Spelling = spelling;
+  int CodePoint = codePoint;
+}
+
+// The list below includes named character references supported by Doxygen:
+// http://www.stack.nl/~dimitri/doxygen/manual/htmlcmds.html
+//
+// It does not include all HTML 5 named character references.
+//
+// Corresponding code point values can be found here:
+// http://www.w3.org/TR/2011/WD-html5-20110113/named-character-references.html
+
+def : NCR<"copy",  0x000A9>;
+def : NCR<"COPY",  0x000A9>;
+def : NCR<"trade", 0x02122>;
+def : NCR<"TRADE", 0x02122>;
+def : NCR<"reg",   0x000AE>;
+def : NCR<"REG",   0x000AE>;
+def : NCR<"lt",    0x0003C>;
+def : NCR<"Lt",    0x0003C>;
+def : NCR<"LT",    0x0003C>;
+def : NCR<"gt",    0x0003E>;
+def : NCR<"Gt",    0x0003E>;
+def : NCR<"GT",    0x0003E>;
+def : NCR<"amp",   0x00026>;
+def : NCR<"AMP",   0x00026>;
+def : NCR<"apos",  0x00027>;
+def : NCR<"quot",  0x00022>;
+def : NCR<"QUOT",  0x00022>;
+def : NCR<"lsquo", 0x02018>;
+def : NCR<"rsquo", 0x02019>;
+def : NCR<"ldquo", 0x0201C>;
+def : NCR<"rdquo", 0x0201D>;
+def : NCR<"ndash", 0x02013>;
+def : NCR<"mdash", 0x02014>;
+
+def : NCR<"Auml", 0x000C4>;
+def : NCR<"Euml", 0x000CB>;
+def : NCR<"Iuml", 0x000CF>;
+def : NCR<"Ouml", 0x000D6>;
+def : NCR<"Uuml", 0x000DC>;
+def : NCR<"Yuml", 0x00178>;
+def : NCR<"auml", 0x000E4>;
+def : NCR<"euml", 0x000EB>;
+def : NCR<"iuml", 0x000EF>;
+def : NCR<"ouml", 0x000F6>;
+def : NCR<"uuml", 0x000FC>;
+def : NCR<"yuml", 0x000FF>;
+
+def : NCR<"Aacute", 0x000C1>;
+def : NCR<"Eacute", 0x000C9>;
+def : NCR<"Iacute", 0x000CD>;
+def : NCR<"Oacute", 0x000D3>;
+def : NCR<"Uacute", 0x000DA>;
+def : NCR<"Yacute", 0x000DD>;
+def : NCR<"aacute", 0x000E1>;
+def : NCR<"eacute", 0x000E9>;
+def : NCR<"iacute", 0x000ED>;
+def : NCR<"oacute", 0x000F3>;
+def : NCR<"uacute", 0x000FA>;
+def : NCR<"yacute", 0x000FD>;
+
+def : NCR<"Agrave", 0x000C0>;
+def : NCR<"Egrave", 0x000C8>;
+def : NCR<"Igrave", 0x000CC>;
+def : NCR<"Ograve", 0x000D2>;
+def : NCR<"Ugrave", 0x000D9>;
+// def : NCR<"Ygrave", 0x01EF2>; // Defined neither in Doxygen, nor in HTML5.
+def : NCR<"agrave", 0x000E0>;
+def : NCR<"egrave", 0x000E8>;
+def : NCR<"igrave", 0x000EC>;
+def : NCR<"ograve", 0x000F2>;
+def : NCR<"ugrave", 0x000F9>;
+def : NCR<"ygrave", 0x01EF3>; // Defined in Doxygen, not defined in HTML5.
+
+def : NCR<"Acirc", 0x000C2>;
+def : NCR<"Ecirc", 0x000CA>;
+def : NCR<"Icirc", 0x000CE>;
+def : NCR<"Ocirc", 0x000D4>;
+def : NCR<"Ucirc", 0x000DB>;
+def : NCR<"Ycirc", 0x00176>; // Not defined in Doxygen, defined in HTML5.
+def : NCR<"acirc", 0x000E2>;
+def : NCR<"ecirc", 0x000EA>;
+def : NCR<"icirc", 0x000EE>;
+def : NCR<"ocirc", 0x000F4>;
+def : NCR<"ucirc", 0x000FB>;
+def : NCR<"ycirc", 0x00177>;
+
+def : NCR<"Atilde", 0x000C3>;
+def : NCR<"Ntilde", 0x000D1>;
+def : NCR<"Otilde", 0x000D5>;
+def : NCR<"atilde", 0x000E3>;
+def : NCR<"ntilde", 0x000F1>;
+def : NCR<"otilde", 0x000F5>;
+
+def : NCR<"szlig", 0x000DF>;
+
+def : NCR<"ccedil", 0x000E7>;
+def : NCR<"Ccedil", 0x000C7>;
+
+def : NCR<"aring", 0x000E5>;
+def : NCR<"Aring", 0x000C5>;
+
+def : NCR<"nbsp", 0x000A0>;
+
+def : NCR<"Gamma",   0x00393>;
+def : NCR<"Delta",   0x00394>;
+def : NCR<"Theta",   0x00398>;
+def : NCR<"Lambda",  0x0039B>;
+def : NCR<"Xi",      0x0039E>;
+def : NCR<"Pi",      0x003A0>;
+def : NCR<"Sigma",   0x003A3>;
+def : NCR<"Upsilon", 0x003A5>;
+def : NCR<"Phi",     0x003A6>;
+def : NCR<"Psi",     0x003A8>;
+def : NCR<"Omega",   0x003A9>;
+
+def : NCR<"alpha",   0x003B1>;
+def : NCR<"beta",    0x003B2>;
+def : NCR<"gamma",   0x003B3>;
+def : NCR<"delta",   0x003B4>;
+def : NCR<"epsilon", 0x003B5>;
+def : NCR<"zeta",    0x003B6>;
+def : NCR<"eta",     0x003B7>;
+def : NCR<"theta",   0x003B8>;
+def : NCR<"iota",    0x003B9>;
+def : NCR<"kappa",   0x003BA>;
+def : NCR<"lambda",  0x003BB>;
+def : NCR<"mu",      0x003BC>;
+def : NCR<"nu",      0x003BD>;
+def : NCR<"xi",      0x003BE>;
+def : NCR<"pi",      0x003C0>;
+def : NCR<"rho",     0x003C1>;
+def : NCR<"sigma",   0x003C3>;
+def : NCR<"tau",     0x003C4>;
+def : NCR<"upsilon", 0x003C5>;
+def : NCR<"phi",     0x003C6>;
+def : NCR<"chi",     0x003C7>;
+def : NCR<"psi",     0x003C8>;
+def : NCR<"omega",   0x003C9>;
+def : NCR<"sigmaf",  0x003C2>;
+
+def : NCR<"sect",   0x000A7>;
+def : NCR<"deg",    0x000B0>;
+def : NCR<"prime",  0x02032>;
+def : NCR<"Prime",  0x02033>;
+def : NCR<"infin",  0x0221E>;
+def : NCR<"empty",  0x02205>;
+def : NCR<"plusmn", 0x000B1>;
+def : NCR<"times",  0x000D7>;
+def : NCR<"minus",  0x02212>;
+def : NCR<"sdot",   0x022C5>;
+def : NCR<"part",   0x02202>;
+def : NCR<"nabla",  0x02207>;
+def : NCR<"radic",  0x0221A>;
+def : NCR<"perp",   0x022A5>;
+def : NCR<"sum",    0x02211>;
+def : NCR<"int",    0x0222B>;
+def : NCR<"prod",   0x0220F>;
+def : NCR<"sim",    0x0223C>;
+def : NCR<"asymp",  0x02248>;
+def : NCR<"ne",     0x02260>;
+def : NCR<"equiv",  0x02261>;
+def : NCR<"prop",   0x0221D>;
+def : NCR<"le",     0x02264>;
+def : NCR<"ge",     0x02265>;
+def : NCR<"larr",   0x02190>;
+def : NCR<"rarr",   0x02192>;
+def : NCR<"isin",   0x02208>;
+def : NCR<"notin",  0x02209>;
+def : NCR<"lceil",  0x02308>;
+def : NCR<"rceil",  0x02309>;
+def : NCR<"lfloor", 0x0230A>;
+def : NCR<"rfloor", 0x0230B>;
+
diff --git a/include/clang/AST/CommentLexer.h b/include/clang/AST/CommentLexer.h
index f263697..4179f45 100644
--- a/include/clang/AST/CommentLexer.h
+++ b/include/clang/AST/CommentLexer.h
@@ -15,9 +15,9 @@
 #define LLVM_CLANG_AST_COMMENT_LEXER_H
 
 #include "clang/Basic/SourceManager.h"
-#include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
 #include "llvm/Support/Allocator.h"
 #include "llvm/Support/raw_ostream.h"
 
@@ -34,8 +34,9 @@ enum TokenKind {
   eof,
   newline,
   text,
-  unknown_command, // Command that does not have an ID.
-  command,         // Command with an ID.
+  unknown_command,   // Command that does not have an ID.
+  backslash_command, // Command with an ID, that used backslash marker.
+  at_command,        // Command with an ID, that used 'at' marker.
   verbatim_block_begin,
   verbatim_block_line,
   verbatim_block_end,
@@ -75,7 +76,7 @@ class Token {
   /// unused (command spelling can be found with CommandTraits).  Otherwise,
   /// contains the length of the string that starts at TextPtr.
   unsigned IntVal;
-
+  
 public:
   SourceLocation getLocation() const LLVM_READONLY { return Loc; }
   void setLocation(SourceLocation SL) { Loc = SL; }
@@ -118,12 +119,12 @@ public:
   }
 
   unsigned getCommandID() const LLVM_READONLY {
-    assert(is(tok::command));
+    assert(is(tok::backslash_command) || is(tok::at_command));
     return IntVal;
   }
 
   void setCommandID(unsigned ID) {
-    assert(is(tok::command));
+    assert(is(tok::backslash_command) || is(tok::at_command));
     IntVal = ID;
   }
 
diff --git a/include/clang/AST/CommentParser.h b/include/clang/AST/CommentParser.h
index 19e1d57..d6a1072 100644
--- a/include/clang/AST/CommentParser.h
+++ b/include/clang/AST/CommentParser.h
@@ -14,10 +14,10 @@
 #ifndef LLVM_CLANG_AST_COMMENT_PARSER_H
 #define LLVM_CLANG_AST_COMMENT_PARSER_H
 
-#include "clang/Basic/Diagnostic.h"
-#include "clang/AST/CommentLexer.h"
 #include "clang/AST/Comment.h"
+#include "clang/AST/CommentLexer.h"
 #include "clang/AST/CommentSema.h"
+#include "clang/Basic/Diagnostic.h"
 #include "llvm/Support/Allocator.h"
 
 namespace clang {
@@ -86,6 +86,11 @@ class Parser {
     Tok = Toks[0];
   }
 
+  bool isTokBlockCommand() {
+    return (Tok.is(tok::backslash_command) || Tok.is(tok::at_command)) &&
+           Traits.getCommandInfo(Tok.getCommandID())->IsBlockCommand;
+  }
+
 public:
   Parser(Lexer &L, Sema &S, llvm::BumpPtrAllocator &Allocator,
          const SourceManager &SourceMgr, DiagnosticsEngine &Diags,
diff --git a/include/clang/AST/CommentSema.h b/include/clang/AST/CommentSema.h
index 0340b3c..15e454d 100644
--- a/include/clang/AST/CommentSema.h
+++ b/include/clang/AST/CommentSema.h
@@ -14,12 +14,12 @@
 #ifndef LLVM_CLANG_AST_COMMENT_SEMA_H
 #define LLVM_CLANG_AST_COMMENT_SEMA_H
 
+#include "clang/AST/Comment.h"
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/SourceLocation.h"
-#include "clang/AST/Comment.h"
 #include "llvm/ADT/ArrayRef.h"
-#include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
 #include "llvm/Support/Allocator.h"
 
 namespace clang {
@@ -60,6 +60,9 @@ class Sema {
 
   /// AST node for the \\returns command and its aliases.
   const BlockCommandComment *ReturnsCommand;
+  
+  /// AST node for the \\headerfile command.
+  const BlockCommandComment *HeaderfileCommand;
 
   DiagnosticBuilder Diag(SourceLocation Loc, unsigned DiagID) {
     return Diags.Report(Loc, DiagID);
@@ -93,7 +96,8 @@ public:
 
   BlockCommandComment *actOnBlockCommandStart(SourceLocation LocBegin,
                                               SourceLocation LocEnd,
-                                              unsigned CommandID);
+                                              unsigned CommandID,
+                                              CommandMarkerKind CommandMarker);
 
   void actOnBlockCommandArgs(BlockCommandComment *Command,
                              ArrayRef<BlockCommandComment::Argument> Args);
@@ -103,7 +107,8 @@ public:
 
   ParamCommandComment *actOnParamCommandStart(SourceLocation LocBegin,
                                               SourceLocation LocEnd,
-                                              unsigned CommandID);
+                                              unsigned CommandID,
+                                              CommandMarkerKind CommandMarker);
 
   void actOnParamCommandDirectionArg(ParamCommandComment *Command,
                                      SourceLocation ArgLocBegin,
@@ -120,7 +125,8 @@ public:
 
   TParamCommandComment *actOnTParamCommandStart(SourceLocation LocBegin,
                                                 SourceLocation LocEnd,
-                                                unsigned CommandID);
+                                                unsigned CommandID,
+                                                CommandMarkerKind CommandMarker);
 
   void actOnTParamCommandParamNameArg(TParamCommandComment *Command,
                                       SourceLocation ArgLocBegin,
@@ -192,13 +198,28 @@ public:
   void checkBlockCommandDuplicate(const BlockCommandComment *Command);
 
   void checkDeprecatedCommand(const BlockCommandComment *Comment);
+  
+  void checkFunctionDeclVerbatimLine(const BlockCommandComment *Comment);
+  
+  void checkContainerDeclVerbatimLine(const BlockCommandComment *Comment);
+  
+  void checkContainerDecl(const BlockCommandComment *Comment);
 
   /// Resolve parameter names to parameter indexes in function declaration.
   /// Emit diagnostics about unknown parametrs.
   void resolveParamCommandIndexes(const FullComment *FC);
 
   bool isFunctionDecl();
+  bool isAnyFunctionDecl();
+  bool isFunctionPointerVarDecl();
+  bool isObjCMethodDecl();
+  bool isObjCPropertyDecl();
   bool isTemplateOrSpecialization();
+  bool isRecordLikeDecl();
+  bool isClassOrStructDecl();
+  bool isUnionDecl();
+  bool isObjCInterfaceDecl();
+  bool isObjCProtocolDecl();
 
   ArrayRef<const ParmVarDecl *> getParamVars();
 
diff --git a/include/clang/AST/CommentVisitor.h b/include/clang/AST/CommentVisitor.h
index 47867a6..21641bf 100644
--- a/include/clang/AST/CommentVisitor.h
+++ b/include/clang/AST/CommentVisitor.h
@@ -7,6 +7,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef LLVM_CLANG_AST_COMMENTVISITOR_H
+#define LLVM_CLANG_AST_COMMENTVISITOR_H
+
 #include "clang/AST/Comment.h"
 #include "llvm/Support/ErrorHandling.h"
 
@@ -64,3 +67,4 @@ class ConstCommentVisitor :
 } // end namespace comments
 } // end namespace clang
 
+#endif
diff --git a/include/clang/AST/Decl.h b/include/clang/AST/Decl.h
index 087a585..7927279 100644
--- a/include/clang/AST/Decl.h
+++ b/include/clang/AST/Decl.h
@@ -16,33 +16,34 @@
 
 #include "clang/AST/APValue.h"
 #include "clang/AST/DeclBase.h"
-#include "clang/AST/Redeclarable.h"
 #include "clang/AST/DeclarationName.h"
 #include "clang/AST/ExternalASTSource.h"
+#include "clang/AST/Redeclarable.h"
+#include "clang/AST/Type.h"
 #include "clang/Basic/Linkage.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/Optional.h"
 #include "llvm/Support/Compiler.h"
 
 namespace clang {
+struct ASTTemplateArgumentListInfo;
 class CXXTemporary;
+class CompoundStmt;
+class DependentFunctionTemplateSpecializationInfo;
 class Expr;
 class FunctionTemplateDecl;
+class FunctionTemplateSpecializationInfo;
+class LabelStmt;
+class MemberSpecializationInfo;
+class Module;
+class NestedNameSpecifier;
 class Stmt;
-class CompoundStmt;
 class StringLiteral;
-class NestedNameSpecifier;
-class TemplateParameterList;
 class TemplateArgumentList;
-struct ASTTemplateArgumentListInfo;
-class MemberSpecializationInfo;
-class FunctionTemplateSpecializationInfo;
-class DependentFunctionTemplateSpecializationInfo;
+class TemplateParameterList;
 class TypeLoc;
 class UnresolvedSetImpl;
-class LabelStmt;
-class Module;
-  
+
 /// \brief A container of type source information.
 ///
 /// A client can read the relevant info using TypeLoc wrappers, e.g:
@@ -108,6 +109,7 @@ class NamedDecl : public Decl {
 
 private:
   NamedDecl *getUnderlyingDeclImpl();
+  void verifyLinkage() const;
 
 protected:
   NamedDecl(Kind DK, DeclContext *DC, SourceLocation L, DeclarationName N)
@@ -149,32 +151,29 @@ public:
   /// \brief Set the name of this declaration.
   void setDeclName(DeclarationName N) { Name = N; }
 
-  /// getQualifiedNameAsString - Returns human-readable qualified name for
+  /// printQualifiedName - Returns human-readable qualified name for
   /// declaration, like A::B::i, for i being member of namespace A::B.
   /// If declaration is not member of context which can be named (record,
-  /// namespace), it will return same result as getNameAsString().
+  /// namespace), it will return same result as printName().
   /// Creating this name is expensive, so it should be called only when
   /// performance doesn't matter.
+  void printQualifiedName(raw_ostream &OS) const;
+  void printQualifiedName(raw_ostream &OS, const PrintingPolicy &Policy) const;
+
+  // FIXME: Remove string versions.
   std::string getQualifiedNameAsString() const;
   std::string getQualifiedNameAsString(const PrintingPolicy &Policy) const;
 
   /// getNameForDiagnostic - Appends a human-readable name for this
-  /// declaration into the given string.
+  /// declaration into the given stream.
   ///
   /// This is the method invoked by Sema when displaying a NamedDecl
   /// in a diagnostic.  It does not necessarily produce the same
-  /// result as getNameAsString(); for example, class template
+  /// result as printName(); for example, class template
   /// specializations are printed with their template arguments.
-  ///
-  /// TODO: use an API that doesn't require so many temporary strings
-  virtual void getNameForDiagnostic(std::string &S,
+  virtual void getNameForDiagnostic(raw_ostream &OS,
                                     const PrintingPolicy &Policy,
-                                    bool Qualified) const {
-    if (Qualified)
-      S += getQualifiedNameAsString(Policy);
-    else
-      S += getNameAsString();
-  }
+                                    bool Qualified) const;
 
   /// declarationReplaces - Determine whether this declaration, if
   /// known to be well-formed within its context, will replace the
@@ -212,117 +211,40 @@ public:
   /// a C++ class.
   bool isCXXInstanceMember() const;
 
-  class LinkageInfo {
-    uint8_t linkage_    : 2;
-    uint8_t visibility_ : 2;
-    uint8_t explicit_   : 1;
-
-    void setVisibility(Visibility V, bool E) { visibility_ = V; explicit_ = E; }
-  public:
-    LinkageInfo() : linkage_(ExternalLinkage), visibility_(DefaultVisibility),
-                    explicit_(false) {}
-    LinkageInfo(Linkage L, Visibility V, bool E)
-      : linkage_(L), visibility_(V), explicit_(E) {
-      assert(linkage() == L && visibility() == V && visibilityExplicit() == E &&
-             "Enum truncated!");
-    }
-
-    static LinkageInfo external() {
-      return LinkageInfo();
-    }
-    static LinkageInfo internal() {
-      return LinkageInfo(InternalLinkage, DefaultVisibility, false);
-    }
-    static LinkageInfo uniqueExternal() {
-      return LinkageInfo(UniqueExternalLinkage, DefaultVisibility, false);
-    }
-    static LinkageInfo none() {
-      return LinkageInfo(NoLinkage, DefaultVisibility, false);
-    }
-
-    Linkage linkage() const { return (Linkage)linkage_; }
-    Visibility visibility() const { return (Visibility)visibility_; }
-    bool visibilityExplicit() const { return explicit_; }
-
-    void setLinkage(Linkage L) { linkage_ = L; }
-    void mergeLinkage(Linkage L) {
-      setLinkage(minLinkage(linkage(), L));
-    }
-    void mergeLinkage(LinkageInfo Other) {
-      mergeLinkage(Other.linkage());
-    }
-
-    // Merge the visibility V giving preference to explicit ones.
-    // This is used, for example, when merging the visibility of a class
-    // down to one of its members. If the member has no explicit visibility,
-    // the class visibility wins.
-    void mergeVisibility(Visibility V, bool E = false) {
-      // Never increase the visibility
-      if (visibility() < V)
-        return;
-
-      // If we have an explicit visibility, keep it
-      if (visibilityExplicit())
-        return;
-
-      setVisibility(V, E);
-    }
-    // Merge the visibility V, keeping the most restrictive one.
-    // This is used for cases like merging the visibility of a template
-    // argument to an instantiation. If we already have a hidden class,
-    // no argument should give it default visibility.
-    void mergeVisibilityWithMin(Visibility V, bool E = false) {
-      // Never increase the visibility
-      if (visibility() < V)
-        return;
-
-      // FIXME: this
-      // If this visibility is explicit, keep it.
-      if (visibilityExplicit() && !E)
-        return;
-
-      // should be replaced with this
-      // Don't lose the explicit bit for nothing
-      //      if (visibility() == V && visibilityExplicit())
-      //        return;
-
-      setVisibility(V, E);
-    }
-    void mergeVisibility(LinkageInfo Other) {
-      mergeVisibility(Other.visibility(), Other.visibilityExplicit());
-    }
-    void mergeVisibilityWithMin(LinkageInfo Other) {
-      mergeVisibilityWithMin(Other.visibility(), Other.visibilityExplicit());
-    }
-
-    void merge(LinkageInfo Other) {
-      mergeLinkage(Other);
-      mergeVisibility(Other);
-    }
-    void mergeWithMin(LinkageInfo Other) {
-      mergeLinkage(Other);
-      mergeVisibilityWithMin(Other);
-    }
-  };
-
   /// \brief Determine what kind of linkage this entity has.
   Linkage getLinkage() const;
 
+  /// \brief True if this decl has external linkage.
+  bool hasExternalLinkage() const {
+    return getLinkage() == ExternalLinkage;
+  }
+
+  /// \brief True if this decl has external linkage. Don't cache the linkage,
+  /// because we are not finished setting up the redecl chain for the decl.
+  bool hasExternalLinkageUncached() const;
+
   /// \brief Determines the visibility of this entity.
   Visibility getVisibility() const {
-    return getLinkageAndVisibility().visibility();
+    return getLinkageAndVisibility().getVisibility();
   }
 
   /// \brief Determines the linkage and visibility of this entity.
   LinkageInfo getLinkageAndVisibility() const;
 
+  /// Kinds of explicit visibility.
+  enum ExplicitVisibilityKind {
+    VisibilityForType,
+    VisibilityForValue
+  };
+
   /// \brief If visibility was explicitly specified for this
   /// declaration, return that visibility.
-  llvm::Optional<Visibility> getExplicitVisibility() const;
+  Optional<Visibility>
+  getExplicitVisibility(ExplicitVisibilityKind kind) const;
 
-  /// \brief Clear the linkage cache in response to a change
-  /// to the declaration.
-  void ClearLinkageCache();
+  /// \brief True if the computed linkage is valid. Used for consistency
+  /// checking. Should always return true.
+  bool isLinkageValid() const;
 
   /// \brief Looks through UsingDecls and ObjCCompatibleAliasDecls for
   /// the underlying named decl.
@@ -538,9 +460,7 @@ public:
 
   /// \brief Determine whether this symbol is weakly-imported,
   ///        or declared with the weak or weak-ref attr.
-  bool isWeak() const {
-    return hasAttr<WeakAttr>() || hasAttr<WeakRefAttr>() || isWeakImported();
-  }
+  bool isWeak() const;
 
   // Implement isa/cast/dyncast/etc.
   static bool classof(const Decl *D) { return classofKind(D->getKind()); }
@@ -744,7 +664,6 @@ private:
     friend class ASTDeclReader;
 
     unsigned SClass : 3;
-    unsigned SClassAsWritten : 3;
     unsigned ThreadSpecified : 1;
     unsigned InitStyle : 2;
 
@@ -811,14 +730,12 @@ protected:
 
   VarDecl(Kind DK, DeclContext *DC, SourceLocation StartLoc,
           SourceLocation IdLoc, IdentifierInfo *Id,
-          QualType T, TypeSourceInfo *TInfo, StorageClass SC,
-          StorageClass SCAsWritten)
+          QualType T, TypeSourceInfo *TInfo, StorageClass SC)
     : DeclaratorDecl(DK, DC, IdLoc, Id, T, TInfo, StartLoc), Init() {
     assert(sizeof(VarDeclBitfields) <= sizeof(unsigned));
     assert(sizeof(ParmVarDeclBitfields) <= sizeof(unsigned));
     AllBits = 0;
     VarDeclBits.SClass = SC;
-    VarDeclBits.SClassAsWritten = SCAsWritten;
     // Everything else is implicitly initialized to false.
   }
 
@@ -841,23 +758,18 @@ public:
   static VarDecl *Create(ASTContext &C, DeclContext *DC,
                          SourceLocation StartLoc, SourceLocation IdLoc,
                          IdentifierInfo *Id, QualType T, TypeSourceInfo *TInfo,
-                         StorageClass S, StorageClass SCAsWritten);
+                         StorageClass S);
 
   static VarDecl *CreateDeserialized(ASTContext &C, unsigned ID);
   
   virtual SourceRange getSourceRange() const LLVM_READONLY;
 
+  /// \brief Returns the storage class as written in the source. For the
+  /// computed linkage of symbol, see getLinkage.
   StorageClass getStorageClass() const {
     return (StorageClass) VarDeclBits.SClass;
   }
-  StorageClass getStorageClassAsWritten() const {
-    return (StorageClass) VarDeclBits.SClassAsWritten;
-  }
   void setStorageClass(StorageClass SC);
-  void setStorageClassAsWritten(StorageClass SC) {
-    assert(isLegalForVariable(SC));
-    VarDeclBits.SClassAsWritten = SC;
-  }
 
   void setThreadSpecified(bool T) { VarDeclBits.ThreadSpecified = T; }
   bool isThreadSpecified() const {
@@ -882,8 +794,8 @@ public:
     return getStorageClass() == SC_Static && !isFileVarDecl();
   }
 
-  /// hasExternStorage - Returns true if a variable has extern or
-  /// __private_extern__ storage.
+  /// \brief Returns true if a variable has extern or __private_extern__
+  /// storage.
   bool hasExternalStorage() const {
     return getStorageClass() == SC_Extern ||
            getStorageClass() == SC_PrivateExtern;
@@ -894,6 +806,9 @@ public:
   ///  as static variables declared within a function.
   bool hasGlobalStorage() const { return !hasLocalStorage(); }
 
+  /// Compute the language linkage.
+  LanguageLinkage getLanguageLinkage() const;
+
   /// \brief Determines whether this variable is a variable with
   /// external, C linkage.
   bool isExternC() const;
@@ -1087,8 +1002,7 @@ public:
   /// not a constant expression. Returns a pointer to the value if evaluation
   /// succeeded, 0 otherwise.
   APValue *evaluateValue() const;
-  APValue *evaluateValue(
-    llvm::SmallVectorImpl<PartialDiagnosticAt> &Notes) const;
+  APValue *evaluateValue(SmallVectorImpl<PartialDiagnosticAt> &Notes) const;
 
   /// \brief Return the already-evaluated value of this variable's
   /// initializer, or NULL if the value is not yet known. Returns pointer
@@ -1220,7 +1134,7 @@ public:
   ImplicitParamDecl(DeclContext *DC, SourceLocation IdLoc,
                     IdentifierInfo *Id, QualType Type)
     : VarDecl(ImplicitParam, DC, IdLoc, IdLoc, Id, Type,
-              /*tinfo*/ 0, SC_None, SC_None) {
+              /*tinfo*/ 0, SC_None) {
     setImplicit();
   }
 
@@ -1239,8 +1153,8 @@ protected:
   ParmVarDecl(Kind DK, DeclContext *DC, SourceLocation StartLoc,
               SourceLocation IdLoc, IdentifierInfo *Id,
               QualType T, TypeSourceInfo *TInfo,
-              StorageClass S, StorageClass SCAsWritten, Expr *DefArg)
-    : VarDecl(DK, DC, StartLoc, IdLoc, Id, T, TInfo, S, SCAsWritten) {
+              StorageClass S, Expr *DefArg)
+    : VarDecl(DK, DC, StartLoc, IdLoc, Id, T, TInfo, S) {
     assert(ParmVarDeclBits.HasInheritedDefaultArg == false);
     assert(ParmVarDeclBits.IsKNRPromoted == false);
     assert(ParmVarDeclBits.IsObjCMethodParam == false);
@@ -1252,8 +1166,7 @@ public:
                              SourceLocation StartLoc,
                              SourceLocation IdLoc, IdentifierInfo *Id,
                              QualType T, TypeSourceInfo *TInfo,
-                             StorageClass S, StorageClass SCAsWritten,
-                             Expr *DefArg);
+                             StorageClass S, Expr *DefArg);
 
   static ParmVarDecl *CreateDeserialized(ASTContext &C, unsigned ID);
   
@@ -1451,14 +1364,13 @@ private:
   /// DeclsInPrototypeScope - Array of pointers to NamedDecls for
   /// decls defined in the function prototype that are not parameters. E.g.
   /// 'enum Y' in 'void f(enum Y {AA} x) {}'.
-  llvm::ArrayRef<NamedDecl*> DeclsInPrototypeScope;
+  ArrayRef<NamedDecl *> DeclsInPrototypeScope;
 
   LazyDeclStmtPtr Body;
 
   // FIXME: This can be packed into the bitfields in Decl.
   // NOTE: VC++ treats enums as signed, avoid using the StorageClass enum
   unsigned SClass : 2;
-  unsigned SClassAsWritten : 2;
   bool IsInline : 1;
   bool IsInlineSpecified : 1;
   bool IsVirtualAsWritten : 1;
@@ -1473,6 +1385,10 @@ private:
   bool IsLateTemplateParsed : 1;
   bool IsConstexpr : 1;
 
+  /// \brief Indicates if the function was a definition but its body was
+  /// skipped.
+  unsigned HasSkippedBody : 1;
+
   /// \brief End part of this FunctionDecl's source range.
   ///
   /// We could compute the full range in getSourceRange(). However, when we're
@@ -1538,25 +1454,26 @@ private:
   void setInstantiationOfMemberFunction(ASTContext &C, FunctionDecl *FD,
                                         TemplateSpecializationKind TSK);
 
-  void setParams(ASTContext &C, llvm::ArrayRef<ParmVarDecl *> NewParamInfo);
+  void setParams(ASTContext &C, ArrayRef<ParmVarDecl *> NewParamInfo);
 
 protected:
   FunctionDecl(Kind DK, DeclContext *DC, SourceLocation StartLoc,
                const DeclarationNameInfo &NameInfo,
                QualType T, TypeSourceInfo *TInfo,
-               StorageClass S, StorageClass SCAsWritten, bool isInlineSpecified,
+               StorageClass S, bool isInlineSpecified,
                bool isConstexprSpecified)
     : DeclaratorDecl(DK, DC, NameInfo.getLoc(), NameInfo.getName(), T, TInfo,
                      StartLoc),
       DeclContext(DK),
       ParamInfo(0), Body(),
-      SClass(S), SClassAsWritten(SCAsWritten),
+      SClass(S),
       IsInline(isInlineSpecified), IsInlineSpecified(isInlineSpecified),
       IsVirtualAsWritten(false), IsPure(false), HasInheritedPrototype(false),
       HasWrittenPrototype(true), IsDeleted(false), IsTrivial(false),
       IsDefaulted(false), IsExplicitlyDefaulted(false),
       HasImplicitReturnZero(false), IsLateTemplateParsed(false),
-      IsConstexpr(isConstexprSpecified), EndRangeLoc(NameInfo.getEndLoc()),
+      IsConstexpr(isConstexprSpecified), HasSkippedBody(false),
+      EndRangeLoc(NameInfo.getEndLoc()),
       TemplateOrSpecialization(),
       DNLoc(NameInfo.getInfo()) {}
 
@@ -1580,14 +1497,13 @@ public:
                               SourceLocation StartLoc, SourceLocation NLoc,
                               DeclarationName N, QualType T,
                               TypeSourceInfo *TInfo,
-                              StorageClass SC = SC_None,
-                              StorageClass SCAsWritten = SC_None,
+                              StorageClass SC,
                               bool isInlineSpecified = false,
                               bool hasWrittenPrototype = true,
                               bool isConstexprSpecified = false) {
     DeclarationNameInfo NameInfo(N, NLoc);
     return FunctionDecl::Create(C, DC, StartLoc, NameInfo, T, TInfo,
-                                SC, SCAsWritten,
+                                SC,
                                 isInlineSpecified, hasWrittenPrototype,
                                 isConstexprSpecified);
   }
@@ -1596,10 +1512,9 @@ public:
                               SourceLocation StartLoc,
                               const DeclarationNameInfo &NameInfo,
                               QualType T, TypeSourceInfo *TInfo,
-                              StorageClass SC = SC_None,
-                              StorageClass SCAsWritten = SC_None,
-                              bool isInlineSpecified = false,
-                              bool hasWrittenPrototype = true,
+                              StorageClass SC,
+                              bool isInlineSpecified,
+                              bool hasWrittenPrototype,
                               bool isConstexprSpecified = false);
 
   static FunctionDecl *CreateDeserialized(ASTContext &C, unsigned ID);
@@ -1608,7 +1523,7 @@ public:
     return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc);
   }
 
-  virtual void getNameForDiagnostic(std::string &S,
+  virtual void getNameForDiagnostic(raw_ostream &OS,
                                     const PrintingPolicy &Policy,
                                     bool Qualified) const;
 
@@ -1732,7 +1647,7 @@ public:
 
   /// Whether this is a (C++11) constexpr function or constexpr constructor.
   bool isConstexpr() const { return IsConstexpr; }
-  void setConstexpr(bool IC);
+  void setConstexpr(bool IC) { IsConstexpr = IC; }
 
   /// \brief Whether this function has been deleted.
   ///
@@ -1776,6 +1691,9 @@ public:
   /// This function must be an allocation or deallocation function.
   bool isReservedGlobalPlacementOperator() const;
 
+  /// Compute the language linkage.
+  LanguageLinkage getLanguageLinkage() const;
+
   /// \brief Determines whether this function is a function with
   /// external, C linkage.
   bool isExternC() const;
@@ -1783,6 +1701,14 @@ public:
   /// \brief Determines whether this is a global function.
   bool isGlobal() const;
 
+  /// \brief Determines whether this function is known to be 'noreturn', through
+  /// an attribute on its declaration or its type.
+  bool isNoReturn() const;
+
+  /// \brief True if the function was a definition but its body was skipped.
+  bool hasSkippedBody() const { return HasSkippedBody; }
+  void setHasSkippedBody(bool Skipped = true) { HasSkippedBody = Skipped; }
+
   void setPreviousDeclaration(FunctionDecl * PrevDecl);
 
   virtual const FunctionDecl *getCanonicalDecl() const;
@@ -1814,14 +1740,14 @@ public:
     assert(i < getNumParams() && "Illegal param #");
     return ParamInfo[i];
   }
-  void setParams(llvm::ArrayRef<ParmVarDecl *> NewParamInfo) {
+  void setParams(ArrayRef<ParmVarDecl *> NewParamInfo) {
     setParams(getASTContext(), NewParamInfo);
   }
 
-  const llvm::ArrayRef<NamedDecl*> &getDeclsInPrototypeScope() const {
+  const ArrayRef<NamedDecl *> &getDeclsInPrototypeScope() const {
     return DeclsInPrototypeScope;
   }
-  void setDeclsInPrototypeScope(llvm::ArrayRef<NamedDecl *> NewDecls);
+  void setDeclsInPrototypeScope(ArrayRef<NamedDecl *> NewDecls);
 
   /// getMinRequiredArguments - Returns the minimum number of arguments
   /// needed to call this function. This may be fewer than the number of
@@ -1838,12 +1764,9 @@ public:
     return getType()->getAs<FunctionType>()->getCallResultType(getASTContext());
   }
 
+  /// \brief Returns the storage class as written in the source. For the
+  /// computed linkage of symbol, see getLinkage.
   StorageClass getStorageClass() const { return StorageClass(SClass); }
-  void setStorageClass(StorageClass SC);
-
-  StorageClass getStorageClassAsWritten() const {
-    return StorageClass(SClassAsWritten);
-  }
 
   /// \brief Determine whether the "inline" keyword was specified for this
   /// function.
@@ -1863,7 +1786,7 @@ public:
   /// \brief Determine whether this function should be inlined, because it is
   /// either marked "inline" or "constexpr" or is a member function of a class
   /// that was defined in the class body.
-  bool isInlined() const;
+  bool isInlined() const { return IsInline; }
 
   bool isInlineDefinitionExternallyVisible() const;
 
@@ -1908,7 +1831,9 @@ public:
   /// \brief If this function is an instantiation of a member function of a
   /// class template specialization, retrieves the member specialization
   /// information.
-  MemberSpecializationInfo *getMemberSpecializationInfo() const;
+  MemberSpecializationInfo *getMemberSpecializationInfo() const {
+    return TemplateOrSpecialization.dyn_cast<MemberSpecializationInfo*>();
+  }
 
   /// \brief Specify that this record is an instantiation of the
   /// member function FD.
@@ -2472,6 +2397,12 @@ protected:
   /// possible in C++11 or Microsoft extensions mode.
   bool IsFixed : 1;
 
+  /// \brief Indicates whether it is possible for declarations of this kind
+  /// to have an out-of-date definition.
+  ///
+  /// This option is only enabled when modules are enabled.
+  bool MayHaveOutOfDateDef : 1;
+
 private:
   SourceLocation RBraceLoc;
 
@@ -2616,6 +2547,25 @@ public:
   bool isUnion()  const { return getTagKind() == TTK_Union; }
   bool isEnum()   const { return getTagKind() == TTK_Enum; }
 
+  /// Is this tag type named, either directly or via being defined in
+  /// a typedef of this type?
+  ///
+  /// C++11 [basic.link]p8:
+  ///   A type is said to have linkage if and only if:
+  ///     - it is a class or enumeration type that is named (or has a
+  ///       name for linkage purposes) and the name has linkage; ...
+  /// C++11 [dcl.typedef]p9:
+  ///   If the typedef declaration defines an unnamed class (or enum),
+  ///   the first typedef-name declared by the declaration to be that
+  ///   class type (or enum type) is used to denote the class type (or
+  ///   enum type) for linkage purposes only.
+  ///
+  /// C does not have an analogous rule, but the same concept is
+  /// nonetheless useful in some places.
+  bool hasNameForLinkage() const {
+    return (getDeclName() || getTypedefNameForAnonDecl());
+  }
+
   TypedefNameDecl *getTypedefNameForAnonDecl() const {
     return hasExtInfo() ? 0 :
            TypedefNameDeclOrQualifier.get<TypedefNameDecl*>();
@@ -2906,6 +2856,10 @@ class RecordDecl : public TagDecl {
   /// HasObjectMember - This is true if this struct has at least one member
   /// containing an Objective-C object pointer type.
   bool HasObjectMember : 1;
+  
+  /// HasVolatileMember - This is true if struct has at least one member of
+  /// 'volatile' type.
+  bool HasVolatileMember : 1;
 
   /// \brief Whether the field declarations of this record have been loaded
   /// from external storage. To avoid unnecessary deserialization of
@@ -2962,6 +2916,9 @@ public:
   bool hasObjectMember() const { return HasObjectMember; }
   void setHasObjectMember (bool val) { HasObjectMember = val; }
 
+  bool hasVolatileMember() const { return HasVolatileMember; }
+  void setHasVolatileMember (bool val) { HasVolatileMember = val; }
+  
   /// \brief Determines whether this declaration represents the
   /// injected class name.
   ///
@@ -3161,7 +3118,7 @@ public:
     assert(i < getNumParams() && "Illegal param #");
     return ParamInfo[i];
   }
-  void setParams(llvm::ArrayRef<ParmVarDecl *> NewParamInfo);
+  void setParams(ArrayRef<ParmVarDecl *> NewParamInfo);
 
   /// hasCaptures - True if this block (or its nested blocks) captures
   /// anything of local storage from its enclosing scopes.
@@ -3210,7 +3167,7 @@ public:
 ///
 /// An import declaration imports the named module (or submodule). For example:
 /// \code
-///   @__experimental_modules_import std.vector;
+///   @import std.vector;
 /// \endcode
 ///
 /// Import declarations can also be implicitly generated from
@@ -3271,7 +3228,21 @@ public:
   static bool classof(const Decl *D) { return classofKind(D->getKind()); }
   static bool classofKind(Kind K) { return K == Import; }
 };
-  
+
+/// \brief Represents an empty-declaration.
+class EmptyDecl : public Decl {
+  virtual void anchor();
+  EmptyDecl(DeclContext *DC, SourceLocation L)
+    : Decl(Empty, DC, L) { }
+
+public:
+  static EmptyDecl *Create(ASTContext &C, DeclContext *DC,
+                           SourceLocation L);
+  static EmptyDecl *CreateDeserialized(ASTContext &C, unsigned ID);
+
+  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
+  static bool classofKind(Kind K) { return K == Empty; }
+};
 
 /// Insertion operator for diagnostics.  This allows sending NamedDecl's
 /// into a diagnostic with <<.
@@ -3299,10 +3270,10 @@ void Redeclarable<decl_type>::setPreviousDeclaration(decl_type *PrevDecl) {
     // Point to previous. Make sure that this is actually the most recent
     // redeclaration, or we can build invalid chains. If the most recent
     // redeclaration is invalid, it won't be PrevDecl, but we want it anyway.
-    RedeclLink = PreviousDeclLink(
-                   llvm::cast<decl_type>(PrevDecl->getMostRecentDecl()));
     First = PrevDecl->getFirstDeclaration();
     assert(First->RedeclLink.NextIsLatest() && "Expected first");
+    decl_type *MostRecent = First->RedeclLink.getNext();
+    RedeclLink = PreviousDeclLink(cast<decl_type>(MostRecent));
   } else {
     // Make this first.
     First = static_cast<decl_type*>(this);
@@ -3310,8 +3281,8 @@ void Redeclarable<decl_type>::setPreviousDeclaration(decl_type *PrevDecl) {
 
   // First one will point to this one as latest.
   First->RedeclLink = LatestDeclLink(static_cast<decl_type*>(this));
-  if (NamedDecl *ND = dyn_cast<NamedDecl>(static_cast<decl_type*>(this)))
-    ND->ClearLinkageCache();
+  assert(!isa<NamedDecl>(static_cast<decl_type*>(this)) ||
+         cast<NamedDecl>(static_cast<decl_type*>(this))->isLinkageValid());
 }
 
 // Inline function definitions.
diff --git a/include/clang/AST/DeclAccessPair.h b/include/clang/AST/DeclAccessPair.h
index 7ecd8f8..5731308 100644
--- a/include/clang/AST/DeclAccessPair.h
+++ b/include/clang/AST/DeclAccessPair.h
@@ -19,6 +19,7 @@
 #define LLVM_CLANG_AST_DECLACCESSPAIR_H
 
 #include "clang/Basic/Specifiers.h"
+#include "llvm/Support/DataTypes.h"
 
 namespace clang {
 
diff --git a/include/clang/AST/DeclBase.h b/include/clang/AST/DeclBase.h
index 50e2027..852bb9a 100644
--- a/include/clang/AST/DeclBase.h
+++ b/include/clang/AST/DeclBase.h
@@ -14,38 +14,40 @@
 #ifndef LLVM_CLANG_AST_DECLBASE_H
 #define LLVM_CLANG_AST_DECLBASE_H
 
-#include "clang/AST/Attr.h"
+#include "clang/AST/AttrIterator.h"
 #include "clang/AST/DeclarationName.h"
-#include "clang/AST/Type.h"
 #include "clang/Basic/Specifiers.h"
 #include "llvm/ADT/PointerUnion.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/PrettyStackTrace.h"
 
 namespace clang {
-class DeclContext;
-class TranslationUnitDecl;
-class NamespaceDecl;
-class UsingDirectiveDecl;
-class NamedDecl;
-class FunctionDecl;
+class ASTMutationListener;
+class BlockDecl;
 class CXXRecordDecl;
+class CompoundStmt;
+class DeclContext;
+class DeclarationName;
+class DependentDiagnostic;
 class EnumDecl;
-class ObjCMethodDecl;
-class ObjCContainerDecl;
-class ObjCInterfaceDecl;
+class FunctionDecl;
+class LinkageSpecDecl;
+class Module;
+class NamedDecl;
+class NamespaceDecl;
 class ObjCCategoryDecl;
-class ObjCProtocolDecl;
-class ObjCImplementationDecl;
 class ObjCCategoryImplDecl;
+class ObjCContainerDecl;
 class ObjCImplDecl;
-class LinkageSpecDecl;
-class BlockDecl;
-class DeclarationName;
-class CompoundStmt;
+class ObjCImplementationDecl;
+class ObjCInterfaceDecl;
+class ObjCMethodDecl;
+class ObjCProtocolDecl;
+struct PrintingPolicy;
+class Stmt;
 class StoredDeclsMap;
-class DependentDiagnostic;
-class ASTMutationListener;
+class TranslationUnitDecl;
+class UsingDirectiveDecl;
 }
 
 namespace llvm {
@@ -133,7 +135,7 @@ public:
     /// or member ends up here.
     IDNS_Ordinary            = 0x0020,
 
-    /// Objective C @protocol.
+    /// Objective C \@protocol.
     IDNS_ObjCProtocol        = 0x0040,
 
     /// This declaration is a friend function.  A friend function
@@ -335,7 +337,10 @@ protected:
   static void *AllocateDeserializedDecl(const ASTContext &Context,
                                         unsigned ID,
                                         unsigned Size);
-  
+
+  /// \brief Update a potentially out-of-date declaration.
+  void updateOutOfDate(IdentifierInfo &II) const;
+
 public:
 
   /// \brief Source range that this declaration covers.
@@ -455,9 +460,7 @@ public:
 
   /// getMaxAlignment - return the maximum alignment specified by attributes
   /// on this decl, 0 if there are none.
-  unsigned getMaxAlignment() const {
-    return hasAttrs() ? getMaxAttrAlignment(getAttrs(), getASTContext()) : 0;
-  }
+  unsigned getMaxAlignment() const;
 
   /// setInvalidDecl - Indicates the Decl had a semantic error. This
   /// allows for graceful error recovery.
@@ -593,7 +596,18 @@ public:
     
     return 0;
   }
-  
+
+private:
+  Module *getOwningModuleSlow() const;
+
+public:
+  Module *getOwningModule() const {
+    if (!isFromASTFile())
+      return 0;
+
+    return getOwningModuleSlow();
+  }
+
   unsigned getIdentifierNamespace() const {
     return IdentifierNamespace;
   }
@@ -851,6 +865,8 @@ public:
                          unsigned Indentation = 0);
   // Debuggers don't usually respect default arguments.
   LLVM_ATTRIBUTE_USED void dump() const;
+  // Same as dump(), but forces color printing.
+  LLVM_ATTRIBUTE_USED void dumpColor() const;
   void dump(raw_ostream &Out) const;
   // Debuggers don't usually respect default arguments.
   LLVM_ATTRIBUTE_USED void dumpXML() const;
@@ -891,29 +907,9 @@ public:
   virtual void print(raw_ostream &OS) const;
 };
 
-class DeclContextLookupResult
-  : public std::pair<NamedDecl**,NamedDecl**> {
-public:
-  DeclContextLookupResult(NamedDecl **I, NamedDecl **E)
-    : std::pair<NamedDecl**,NamedDecl**>(I, E) {}
-  DeclContextLookupResult()
-    : std::pair<NamedDecl**,NamedDecl**>() {}
+typedef llvm::MutableArrayRef<NamedDecl*> DeclContextLookupResult;
 
-  using std::pair<NamedDecl**,NamedDecl**>::operator=;
-};
-
-class DeclContextLookupConstResult
-  : public std::pair<NamedDecl*const*, NamedDecl*const*> {
-public:
-  DeclContextLookupConstResult(std::pair<NamedDecl**,NamedDecl**> R)
-    : std::pair<NamedDecl*const*, NamedDecl*const*>(R) {}
-  DeclContextLookupConstResult(NamedDecl * const *I, NamedDecl * const *E)
-    : std::pair<NamedDecl*const*, NamedDecl*const*>(I, E) {}
-  DeclContextLookupConstResult()
-    : std::pair<NamedDecl*const*, NamedDecl*const*>() {}
-
-  using std::pair<NamedDecl*const*,NamedDecl*const*>::operator=;
-};
+typedef ArrayRef<NamedDecl *> DeclContextLookupConstResult;
 
 /// DeclContext - This is used only as base class of specific decl types that
 /// can act as declaration contexts. These decls are (only the top classes
@@ -935,19 +931,26 @@ class DeclContext {
   /// \brief Whether this declaration context also has some external
   /// storage that contains additional declarations that are lexically
   /// part of this context.
-  mutable unsigned ExternalLexicalStorage : 1;
+  mutable bool ExternalLexicalStorage : 1;
 
   /// \brief Whether this declaration context also has some external
   /// storage that contains additional declarations that are visible
   /// in this context.
-  mutable unsigned ExternalVisibleStorage : 1;
+  mutable bool ExternalVisibleStorage : 1;
+
+  /// \brief Whether this declaration context has had external visible
+  /// storage added since the last lookup. In this case, \c LookupPtr's
+  /// invariant may not hold and needs to be fixed before we perform
+  /// another lookup.
+  mutable bool NeedToReconcileExternalVisibleStorage : 1;
 
   /// \brief Pointer to the data structure used to lookup declarations
   /// within this context (or a DependentStoredDeclsMap if this is a
   /// dependent context), and a bool indicating whether we have lazily
   /// omitted any declarations from the map. We maintain the invariant
-  /// that, if the map contains an entry for a DeclarationName, then it
-  /// contains all relevant entries for that name.
+  /// that, if the map contains an entry for a DeclarationName (and we
+  /// haven't lazily omitted anything), then it contains all relevant
+  /// entries for that name.
   mutable llvm::PointerIntPair<StoredDeclsMap*, 1, bool> LookupPtr;
 
 protected:
@@ -970,10 +973,11 @@ protected:
   static std::pair<Decl *, Decl *>
   BuildDeclChain(ArrayRef<Decl*> Decls, bool FieldsAlreadyLoaded);
 
-   DeclContext(Decl::Kind K)
-     : DeclKind(K), ExternalLexicalStorage(false),
-       ExternalVisibleStorage(false), LookupPtr(0, false), FirstDecl(0),
-       LastDecl(0) { }
+  DeclContext(Decl::Kind K)
+      : DeclKind(K), ExternalLexicalStorage(false),
+        ExternalVisibleStorage(false),
+        NeedToReconcileExternalVisibleStorage(false), LookupPtr(0, false),
+        FirstDecl(0), LastDecl(0) {}
 
 public:
   ~DeclContext();
@@ -1086,6 +1090,10 @@ public:
   /// a C++ extern "C" linkage spec.
   bool isExternCContext() const;
 
+  /// \brief Determines whether this context is, or is nested within,
+  /// a C++ extern "C++" linkage spec.
+  bool isExternCXXContext() const;
+
   /// \brief Determine whether this declaration context is equivalent
   /// to the declaration context DC.
   bool Equals(const DeclContext *DC) const {
@@ -1160,7 +1168,7 @@ public:
   /// contexts that are semanticaly connected to this declaration context,
   /// in source order, including this context (which may be the only result,
   /// for non-namespace contexts).
-  void collectAllContexts(llvm::SmallVectorImpl<DeclContext *> &Contexts);
+  void collectAllContexts(SmallVectorImpl<DeclContext *> &Contexts);
 
   /// decl_iterator - Iterates through the declarations stored
   /// within this context.
@@ -1423,7 +1431,7 @@ public:
   /// usual relationship between a DeclContext and the external source.
   /// See the ASTImporter for the (few, but important) use cases.
   void localUncachedLookup(DeclarationName Name,
-                           llvm::SmallVectorImpl<NamedDecl *> &Results);
+                           SmallVectorImpl<NamedDecl *> &Results);
 
   /// @brief Makes a declaration visible within this context.
   ///
@@ -1473,9 +1481,9 @@ public:
   // Low-level accessors
     
   /// \brief Mark the lookup table as needing to be built.  This should be
-  /// used only if setHasExternalLexicalStorage() has been called.
+  /// used only if setHasExternalLexicalStorage() has been called on any
+  /// decl context for which this is the primary context.
   void setMustBuildLookupTable() {
-    assert(ExternalLexicalStorage && "Requires external lexical storage");
     LookupPtr.setInt(true);
   }
 
@@ -1504,6 +1512,8 @@ public:
   /// declarations visible in this context.
   void setHasExternalVisibleStorage(bool ES = true) {
     ExternalVisibleStorage = ES;
+    if (ES && LookupPtr.getPointer())
+      NeedToReconcileExternalVisibleStorage = true;
   }
 
   /// \brief Determine whether the given declaration is stored in the list of
@@ -1519,6 +1529,7 @@ public:
   LLVM_ATTRIBUTE_USED void dumpDeclContext() const;
 
 private:
+  void reconcileExternalVisibleStorage();
   void LoadLexicalDeclsFromExternalStorage() const;
 
   /// @brief Makes a declaration visible within this context, but
diff --git a/include/clang/AST/DeclCXX.h b/include/clang/AST/DeclCXX.h
index 9cb56e2..05ff49c 100644
--- a/include/clang/AST/DeclCXX.h
+++ b/include/clang/AST/DeclCXX.h
@@ -15,11 +15,11 @@
 #ifndef LLVM_CLANG_AST_DECLCXX_H
 #define LLVM_CLANG_AST_DECLCXX_H
 
+#include "clang/AST/ASTUnresolvedSet.h"
+#include "clang/AST/Decl.h"
 #include "clang/AST/Expr.h"
 #include "clang/AST/ExprCXX.h"
-#include "clang/AST/Decl.h"
 #include "clang/AST/TypeLoc.h"
-#include "clang/AST/UnresolvedSet.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/PointerIntPair.h"
 #include "llvm/ADT/SmallPtrSet.h"
@@ -69,17 +69,6 @@ public:
 } // end namespace clang
 
 namespace llvm {
-  /// Implement simplify_type for AnyFunctionDecl, so that we can dyn_cast from
-  /// AnyFunctionDecl to any function or function template declaration.
-  template<> struct simplify_type<const ::clang::AnyFunctionDecl> {
-    typedef ::clang::NamedDecl* SimpleType;
-    static SimpleType getSimplifiedValue(const ::clang::AnyFunctionDecl &Val) {
-      return Val;
-    }
-  };
-  template<> struct simplify_type< ::clang::AnyFunctionDecl>
-  : public simplify_type<const ::clang::AnyFunctionDecl> {};
-
   // Provide PointerLikeTypeTraits for non-cvr pointers.
   template<>
   class PointerLikeTypeTraits< ::clang::AnyFunctionDecl> {
@@ -272,32 +261,25 @@ class CXXRecordDecl : public RecordDecl {
 
   friend void TagDecl::startDefinition();
 
+  /// Values used in DefinitionData fields to represent special members.
+  enum SpecialMemberFlags {
+    SMF_DefaultConstructor = 0x1,
+    SMF_CopyConstructor = 0x2,
+    SMF_MoveConstructor = 0x4,
+    SMF_CopyAssignment = 0x8,
+    SMF_MoveAssignment = 0x10,
+    SMF_Destructor = 0x20,
+    SMF_All = 0x3f
+  };
+
   struct DefinitionData {
     DefinitionData(CXXRecordDecl *D);
 
-    /// UserDeclaredConstructor - True when this class has a
-    /// user-declared constructor.
+    /// \brief True if this class has any user-declared constructors.
     bool UserDeclaredConstructor : 1;
 
-    /// UserDeclaredCopyConstructor - True when this class has a
-    /// user-declared copy constructor.
-    bool UserDeclaredCopyConstructor : 1;
-
-    /// UserDeclareMoveConstructor - True when this class has a
-    /// user-declared move constructor.
-    bool UserDeclaredMoveConstructor : 1;
-
-    /// UserDeclaredCopyAssignment - True when this class has a
-    /// user-declared copy assignment operator.
-    bool UserDeclaredCopyAssignment : 1;
-
-    /// UserDeclareMoveAssignment - True when this class has a
-    /// user-declared move assignment.
-    bool UserDeclaredMoveAssignment : 1;
-
-    /// UserDeclaredDestructor - True when this class has a
-    /// user-declared destructor.
-    bool UserDeclaredDestructor : 1;
+    /// The user-declared special members which this class has.
+    unsigned UserDeclaredSpecialMembers : 6;
 
     /// Aggregate - True when this class is an aggregate.
     bool Aggregate : 1;
@@ -360,21 +342,46 @@ class CXXRecordDecl : public RecordDecl {
     /// \brief True if any field has an in-class initializer.
     bool HasInClassInitializer : 1;
 
-    /// HasTrivialDefaultConstructor - True when, if this class has a default
-    /// constructor, this default constructor is trivial.
+    /// \brief True if any field is of reference type, and does not have an
+    /// in-class initializer. In this case, value-initialization of this class
+    /// is illegal in C++98 even if the class has a trivial default constructor.
+    bool HasUninitializedReferenceMember : 1;
+
+    /// \brief These flags are \c true if a defaulted corresponding special
+    /// member can't be fully analyzed without performing overload resolution.
+    /// @{
+    bool NeedOverloadResolutionForMoveConstructor : 1;
+    bool NeedOverloadResolutionForMoveAssignment : 1;
+    bool NeedOverloadResolutionForDestructor : 1;
+    /// @}
+
+    /// \brief These flags are \c true if an implicit defaulted corresponding
+    /// special member would be defined as deleted.
+    /// @{
+    bool DefaultedMoveConstructorIsDeleted : 1;
+    bool DefaultedMoveAssignmentIsDeleted : 1;
+    bool DefaultedDestructorIsDeleted : 1;
+    /// @}
+
+    /// \brief The trivial special members which this class has, per
+    /// C++11 [class.ctor]p5, C++11 [class.copy]p12, C++11 [class.copy]p25,
+    /// C++11 [class.dtor]p5, or would have if the member were not suppressed.
+    ///
+    /// This excludes any user-declared but not user-provided special members
+    /// which have been declared but not yet defined.
+    unsigned HasTrivialSpecialMembers : 6;
+
+    /// \brief The declared special members of this class which are known to be
+    /// non-trivial.
     ///
-    /// C++0x [class.ctor]p5
-    ///    A default constructor is trivial if it is not user-provided and if
-    ///     -- its class has no virtual functions and no virtual base classes,
-    ///        and
-    ///     -- no non-static data member of its class has a
-    ///        brace-or-equal-initializer, and
-    ///     -- all the direct base classes of its class have trivial
-    ///        default constructors, and
-    ///     -- for all the nonstatic data members of its class that are of class
-    ///        type (or array thereof), each such class has a trivial
-    ///        default constructor.
-    bool HasTrivialDefaultConstructor : 1;
+    /// This excludes any user-declared but not user-provided special members
+    /// which have been declared but not yet defined, and any implicit special
+    /// members which have not yet been declared.
+    unsigned DeclaredNonTrivialSpecialMembers : 6;
+
+    /// HasIrrelevantDestructor - True when this class has a destructor with no
+    /// semantic effect.
+    bool HasIrrelevantDestructor : 1;
 
     /// HasConstexprNonCopyMoveConstructor - True when this class has at least
     /// one user-declared constexpr constructor which is neither the copy nor
@@ -389,80 +396,6 @@ class CXXRecordDecl : public RecordDecl {
     /// default constructor (either user-declared or implicitly declared).
     bool HasConstexprDefaultConstructor : 1;
 
-    /// HasTrivialCopyConstructor - True when this class has a trivial copy
-    /// constructor.
-    ///
-    /// C++0x [class.copy]p13:
-    ///   A copy/move constructor for class X is trivial if it is neither
-    ///   user-provided and if
-    ///    -- class X has no virtual functions and no virtual base classes, and
-    ///    -- the constructor selected to copy/move each direct base class
-    ///       subobject is trivial, and
-    ///    -- for each non-static data member of X that is of class type (or an
-    ///       array thereof), the constructor selected to copy/move that member
-    ///       is trivial;
-    ///   otherwise the copy/move constructor is non-trivial.
-    bool HasTrivialCopyConstructor : 1;
-
-    /// HasTrivialMoveConstructor - True when this class has a trivial move
-    /// constructor.
-    ///
-    /// C++0x [class.copy]p13:
-    ///   A copy/move constructor for class X is trivial if it is neither
-    ///   user-provided and if
-    ///    -- class X has no virtual functions and no virtual base classes, and
-    ///    -- the constructor selected to copy/move each direct base class
-    ///       subobject is trivial, and
-    ///    -- for each non-static data member of X that is of class type (or an
-    ///       array thereof), the constructor selected to copy/move that member
-    ///       is trivial;
-    ///   otherwise the copy/move constructor is non-trivial.
-    bool HasTrivialMoveConstructor : 1;
-
-    /// HasTrivialCopyAssignment - True when this class has a trivial copy
-    /// assignment operator.
-    ///
-    /// C++0x [class.copy]p27:
-    ///   A copy/move assignment operator for class X is trivial if it is
-    ///   neither user-provided nor deleted and if
-    ///    -- class X has no virtual functions and no virtual base classes, and
-    ///    -- the assignment operator selected to copy/move each direct base
-    ///       class subobject is trivial, and
-    ///    -- for each non-static data member of X that is of class type (or an
-    ///       array thereof), the assignment operator selected to copy/move
-    ///       that member is trivial;
-    ///   otherwise the copy/move assignment operator is non-trivial.
-    bool HasTrivialCopyAssignment : 1;
-
-    /// HasTrivialMoveAssignment - True when this class has a trivial move
-    /// assignment operator.
-    ///
-    /// C++0x [class.copy]p27:
-    ///   A copy/move assignment operator for class X is trivial if it is
-    ///   neither user-provided nor deleted and if
-    ///    -- class X has no virtual functions and no virtual base classes, and
-    ///    -- the assignment operator selected to copy/move each direct base
-    ///       class subobject is trivial, and
-    ///    -- for each non-static data member of X that is of class type (or an
-    ///       array thereof), the assignment operator selected to copy/move
-    ///       that member is trivial;
-    ///   otherwise the copy/move assignment operator is non-trivial.
-    bool HasTrivialMoveAssignment : 1;
-
-    /// HasTrivialDestructor - True when this class has a trivial destructor.
-    ///
-    /// C++ [class.dtor]p3.  A destructor is trivial if it is an
-    /// implicitly-declared destructor and if:
-    /// * all of the direct base classes of its class have trivial destructors
-    ///   and
-    /// * for all of the non-static data members of its class that are of class
-    ///   type (or array thereof), each such class has a trivial destructor.
-    bool HasTrivialDestructor : 1;
-
-    /// HasIrrelevantDestructor - True when this class has a destructor with no
-    /// semantic effect.
-    bool HasIrrelevantDestructor : 1;
-
     /// HasNonLiteralTypeFieldsOrBases - True when this class contains at least
     /// one non-static data member or base class of non-literal or volatile
     /// type.
@@ -472,27 +405,29 @@ class CXXRecordDecl : public RecordDecl {
     /// already computed and are available.
     bool ComputedVisibleConversions : 1;
 
-    /// \brief Whether we have a C++0x user-provided default constructor (not
+    /// \brief Whether we have a C++11 user-provided default constructor (not
     /// explicitly deleted or defaulted).
     bool UserProvidedDefaultConstructor : 1;
 
-    /// \brief Whether we have already declared the default constructor.
-    bool DeclaredDefaultConstructor : 1;
+    /// \brief The special members which have been declared for this class,
+    /// either by the user or implicitly.
+    unsigned DeclaredSpecialMembers : 6;
 
-    /// \brief Whether we have already declared the copy constructor.
-    bool DeclaredCopyConstructor : 1;
+    /// \brief Whether an implicit copy constructor would have a const-qualified
+    /// parameter.
+    bool ImplicitCopyConstructorHasConstParam : 1;
 
-    /// \brief Whether we have already declared the move constructor.
-    bool DeclaredMoveConstructor : 1;
+    /// \brief Whether an implicit copy assignment operator would have a
+    /// const-qualified parameter.
+    bool ImplicitCopyAssignmentHasConstParam : 1;
 
-    /// \brief Whether we have already declared the copy-assignment operator.
-    bool DeclaredCopyAssignment : 1;
+    /// \brief Whether any declared copy constructor has a const-qualified
+    /// parameter.
+    bool HasDeclaredCopyConstructorWithConstParam : 1;
 
-    /// \brief Whether we have already declared the move-assignment operator.
-    bool DeclaredMoveAssignment : 1;
-
-    /// \brief Whether we have already declared a destructor within the class.
-    bool DeclaredDestructor : 1;
+    /// \brief Whether any declared copy assignment operator has either a
+    /// const-qualified reference parameter or a non-reference parameter.
+    bool HasDeclaredCopyAssignmentWithConstParam : 1;
 
     /// \brief Whether an implicit move constructor was attempted to be declared
     /// but would have been deleted.
@@ -522,14 +457,14 @@ class CXXRecordDecl : public RecordDecl {
     /// of this C++ class (but not its inherited conversion
     /// functions). Each of the entries in this overload set is a
     /// CXXConversionDecl.
-    UnresolvedSet<4> Conversions;
+    ASTUnresolvedSet Conversions;
 
     /// VisibleConversions - Overload set containing the conversion
     /// functions of this C++ class and all those inherited conversion
     /// functions that are visible in this class. Each of the entries
     /// in this overload set is a CXXConversionDecl or a
     /// FunctionTemplateDecl.
-    UnresolvedSet<4> VisibleConversions;
+    ASTUnresolvedSet VisibleConversions;
 
     /// Definition - The declaration which defines this record.
     CXXRecordDecl *Definition;
@@ -636,6 +571,10 @@ class CXXRecordDecl : public RecordDecl {
   friend class DeclContext;
   friend class LambdaExpr;
 
+  /// \brief Called from setBases and addedMember to notify the class that a
+  /// direct or virtual base class or a member of class type has been added.
+  void addedClassSubobject(CXXRecordDecl *Base);
+
   /// \brief Notify the class that member has been added.
   ///
   /// This routine helps maintain information about the class based on which
@@ -646,9 +585,6 @@ class CXXRecordDecl : public RecordDecl {
   void markedVirtualFunctionPure();
   friend void FunctionDecl::setPure(bool);
 
-  void markedConstructorConstexpr(CXXConstructorDecl *CD);
-  friend void FunctionDecl::setConstexpr(bool);
-
   friend class ASTNodeImporter;
 
 protected:
@@ -765,7 +701,8 @@ public:
     return reverse_base_class_const_iterator(vbases_begin());
  }
 
-  /// \brief Determine whether this class has any dependent base classes.
+  /// \brief Determine whether this class has any dependent base classes which
+  /// are not the current instantiation.
   bool hasAnyDependentBases() const;
 
   /// Iterator access to method members.  The method iterator visits
@@ -805,47 +742,38 @@ public:
     return data().FirstFriend != 0;
   }
 
+  /// \brief \c true if we know for sure that this class has a single,
+  /// accessible, unambiguous move constructor that is not deleted.
+  bool hasSimpleMoveConstructor() const {
+    return !hasUserDeclaredMoveConstructor() && hasMoveConstructor();
+  }
+  /// \brief \c true if we know for sure that this class has a single,
+  /// accessible, unambiguous move assignment operator that is not deleted.
+  bool hasSimpleMoveAssignment() const {
+    return !hasUserDeclaredMoveAssignment() && hasMoveAssignment();
+  }
+  /// \brief \c true if we know for sure that this class has an accessible
+  /// destructor that is not deleted.
+  bool hasSimpleDestructor() const {
+    return !hasUserDeclaredDestructor() &&
+           !data().DefaultedDestructorIsDeleted;
+  }
+
+  /// \brief Determine whether this class has any default constructors.
+  bool hasDefaultConstructor() const {
+    return (data().DeclaredSpecialMembers & SMF_DefaultConstructor) ||
+           needsImplicitDefaultConstructor();
+  }
+
   /// \brief Determine if we need to declare a default constructor for
   /// this class.
   ///
   /// This value is used for lazy creation of default constructors.
   bool needsImplicitDefaultConstructor() const {
     return !data().UserDeclaredConstructor &&
-           !data().DeclaredDefaultConstructor;
-  }
-
-  /// hasDeclaredDefaultConstructor - Whether this class's default constructor
-  /// has been declared (either explicitly or implicitly).
-  bool hasDeclaredDefaultConstructor() const {
-    return data().DeclaredDefaultConstructor;
+           !(data().DeclaredSpecialMembers & SMF_DefaultConstructor);
   }
 
-  /// hasConstCopyConstructor - Determines whether this class has a
-  /// copy constructor that accepts a const-qualified argument.
-  bool hasConstCopyConstructor() const;
-
-  /// getCopyConstructor - Returns the copy constructor for this class
-  CXXConstructorDecl *getCopyConstructor(unsigned TypeQuals) const;
-
-  /// getMoveConstructor - Returns the move constructor for this class
-  CXXConstructorDecl *getMoveConstructor() const;
-
-  /// \brief Retrieve the copy-assignment operator for this class, if available.
-  ///
-  /// This routine attempts to find the copy-assignment operator for this
-  /// class, using a simplistic form of overload resolution.
-  ///
-  /// \param ArgIsConst Whether the argument to the copy-assignment operator
-  /// is const-qualified.
-  ///
-  /// \returns The copy-assignment operator that can be invoked, or NULL if
-  /// a unique copy-assignment operator could not be found.
-  CXXMethodDecl *getCopyAssignmentOperator(bool ArgIsConst) const;
-
-  /// getMoveAssignmentOperator - Returns the move assignment operator for this
-  /// class
-  CXXMethodDecl *getMoveAssignmentOperator() const;
-
   /// hasUserDeclaredConstructor - Whether this class has any
   /// user-declared constructors. When true, a default constructor
   /// will not be implicitly declared.
@@ -863,35 +791,53 @@ public:
   /// user-declared copy constructor. When false, a copy constructor
   /// will be implicitly declared.
   bool hasUserDeclaredCopyConstructor() const {
-    return data().UserDeclaredCopyConstructor;
+    return data().UserDeclaredSpecialMembers & SMF_CopyConstructor;
   }
 
-  /// \brief Determine whether this class has had its copy constructor
-  /// declared, either via the user or via an implicit declaration.
-  ///
-  /// This value is used for lazy creation of copy constructors.
-  bool hasDeclaredCopyConstructor() const {
-    return data().DeclaredCopyConstructor;
+  /// \brief Determine whether this class needs an implicit copy
+  /// constructor to be lazily declared.
+  bool needsImplicitCopyConstructor() const {
+    return !(data().DeclaredSpecialMembers & SMF_CopyConstructor);
+  }
+
+  /// \brief Determine whether we need to eagerly declare a defaulted copy
+  /// constructor for this class.
+  bool needsOverloadResolutionForCopyConstructor() const {
+    return data().HasMutableFields;
+  }
+
+  /// \brief Determine whether an implicit copy constructor for this type
+  /// would have a parameter with a const-qualified reference type.
+  bool implicitCopyConstructorHasConstParam() const {
+    return data().ImplicitCopyConstructorHasConstParam;
+  }
+
+  /// \brief Determine whether this class has a copy constructor with
+  /// a parameter type which is a reference to a const-qualified type.
+  bool hasCopyConstructorWithConstParam() const {
+    return data().HasDeclaredCopyConstructorWithConstParam ||
+           (needsImplicitCopyConstructor() &&
+            implicitCopyConstructorHasConstParam());
   }
 
   /// hasUserDeclaredMoveOperation - Whether this class has a user-
   /// declared move constructor or assignment operator. When false, a
   /// move constructor and assignment operator may be implicitly declared.
   bool hasUserDeclaredMoveOperation() const {
-    return data().UserDeclaredMoveConstructor ||
-           data().UserDeclaredMoveAssignment;
+    return data().UserDeclaredSpecialMembers &
+             (SMF_MoveConstructor | SMF_MoveAssignment);
   }
 
   /// \brief Determine whether this class has had a move constructor
   /// declared by the user.
   bool hasUserDeclaredMoveConstructor() const {
-    return data().UserDeclaredMoveConstructor;
+    return data().UserDeclaredSpecialMembers & SMF_MoveConstructor;
   }
 
-  /// \brief Determine whether this class has had a move constructor
-  /// declared.
-  bool hasDeclaredMoveConstructor() const {
-    return data().DeclaredMoveConstructor;
+  /// \brief Determine whether this class has a move constructor.
+  bool hasMoveConstructor() const {
+    return (data().DeclaredSpecialMembers & SMF_MoveConstructor) ||
+           needsImplicitMoveConstructor();
   }
 
   /// \brief Determine whether implicit move constructor generation for this
@@ -908,44 +854,66 @@ public:
 
   /// \brief Determine whether this class should get an implicit move
   /// constructor or if any existing special member function inhibits this.
-  ///
-  /// Covers all bullets of C++0x [class.copy]p9 except the last, that the
-  /// constructor wouldn't be deleted, which is only looked up from a cached
-  /// result.
   bool needsImplicitMoveConstructor() const {
     return !hasFailedImplicitMoveConstructor() &&
-           !hasDeclaredMoveConstructor() &&
+           !(data().DeclaredSpecialMembers & SMF_MoveConstructor) &&
            !hasUserDeclaredCopyConstructor() &&
            !hasUserDeclaredCopyAssignment() &&
            !hasUserDeclaredMoveAssignment() &&
-           !hasUserDeclaredDestructor();
+           !hasUserDeclaredDestructor() &&
+           !data().DefaultedMoveConstructorIsDeleted;
+  }
+
+  /// \brief Determine whether we need to eagerly declare a defaulted move
+  /// constructor for this class.
+  bool needsOverloadResolutionForMoveConstructor() const {
+    return data().NeedOverloadResolutionForMoveConstructor;
   }
 
   /// hasUserDeclaredCopyAssignment - Whether this class has a
   /// user-declared copy assignment operator. When false, a copy
   /// assigment operator will be implicitly declared.
   bool hasUserDeclaredCopyAssignment() const {
-    return data().UserDeclaredCopyAssignment;
+    return data().UserDeclaredSpecialMembers & SMF_CopyAssignment;
   }
 
-  /// \brief Determine whether this class has had its copy assignment operator
-  /// declared, either via the user or via an implicit declaration.
-  ///
-  /// This value is used for lazy creation of copy assignment operators.
-  bool hasDeclaredCopyAssignment() const {
-    return data().DeclaredCopyAssignment;
+  /// \brief Determine whether this class needs an implicit copy
+  /// assignment operator to be lazily declared.
+  bool needsImplicitCopyAssignment() const {
+    return !(data().DeclaredSpecialMembers & SMF_CopyAssignment);
+  }
+
+  /// \brief Determine whether we need to eagerly declare a defaulted copy
+  /// assignment operator for this class.
+  bool needsOverloadResolutionForCopyAssignment() const {
+    return data().HasMutableFields;
+  }
+
+  /// \brief Determine whether an implicit copy assignment operator for this
+  /// type would have a parameter with a const-qualified reference type.
+  bool implicitCopyAssignmentHasConstParam() const {
+    return data().ImplicitCopyAssignmentHasConstParam;
+  }
+
+  /// \brief Determine whether this class has a copy assignment operator with
+  /// a parameter type which is a reference to a const-qualified type or is not
+  /// a reference..
+  bool hasCopyAssignmentWithConstParam() const {
+    return data().HasDeclaredCopyAssignmentWithConstParam ||
+           (needsImplicitCopyAssignment() &&
+            implicitCopyAssignmentHasConstParam());
   }
 
   /// \brief Determine whether this class has had a move assignment
   /// declared by the user.
   bool hasUserDeclaredMoveAssignment() const {
-    return data().UserDeclaredMoveAssignment;
+    return data().UserDeclaredSpecialMembers & SMF_MoveAssignment;
   }
 
-  /// hasDeclaredMoveAssignment - Whether this class has a
-  /// declared move assignment operator.
-  bool hasDeclaredMoveAssignment() const {
-    return data().DeclaredMoveAssignment;
+  /// \brief Determine whether this class has a move assignment operator.
+  bool hasMoveAssignment() const {
+    return (data().DeclaredSpecialMembers & SMF_MoveAssignment) ||
+           needsImplicitMoveAssignment();
   }
 
   /// \brief Determine whether implicit move assignment generation for this
@@ -963,34 +931,44 @@ public:
   /// \brief Determine whether this class should get an implicit move
   /// assignment operator or if any existing special member function inhibits
   /// this.
-  ///
-  /// Covers all bullets of C++0x [class.copy]p20 except the last, that the
-  /// constructor wouldn't be deleted.
   bool needsImplicitMoveAssignment() const {
     return !hasFailedImplicitMoveAssignment() &&
-           !hasDeclaredMoveAssignment() &&
+           !(data().DeclaredSpecialMembers & SMF_MoveAssignment) &&
            !hasUserDeclaredCopyConstructor() &&
            !hasUserDeclaredCopyAssignment() &&
            !hasUserDeclaredMoveConstructor() &&
-           !hasUserDeclaredDestructor();
+           !hasUserDeclaredDestructor() &&
+           !data().DefaultedMoveAssignmentIsDeleted;
+  }
+
+  /// \brief Determine whether we need to eagerly declare a move assignment
+  /// operator for this class.
+  bool needsOverloadResolutionForMoveAssignment() const {
+    return data().NeedOverloadResolutionForMoveAssignment;
   }
 
   /// hasUserDeclaredDestructor - Whether this class has a
   /// user-declared destructor. When false, a destructor will be
   /// implicitly declared.
   bool hasUserDeclaredDestructor() const {
-    return data().UserDeclaredDestructor;
+    return data().UserDeclaredSpecialMembers & SMF_Destructor;
   }
 
-  /// \brief Determine whether this class has had its destructor declared,
-  /// either via the user or via an implicit declaration.
-  ///
-  /// This value is used for lazy creation of destructors.
-  bool hasDeclaredDestructor() const { return data().DeclaredDestructor; }
+  /// \brief Determine whether this class needs an implicit destructor to
+  /// be lazily declared.
+  bool needsImplicitDestructor() const {
+    return !(data().DeclaredSpecialMembers & SMF_Destructor);
+  }
+
+  /// \brief Determine whether we need to eagerly declare a destructor for this
+  /// class.
+  bool needsOverloadResolutionForDestructor() const {
+    return data().NeedOverloadResolutionForDestructor;
+  }
 
   /// \brief Determine whether this class describes a lambda function object.
   bool isLambda() const { return hasDefinition() && data().IsLambda; }
-  
+
   /// \brief For a closure type, retrieve the mapping from captured
   /// variables and this to the non-static data members that store the
   /// values or references of the captures.
@@ -1011,21 +989,12 @@ public:
     return isLambda() ? captures_begin() + getLambdaData().NumCaptures : NULL;
   }
 
-  /// getConversions - Retrieve the overload set containing all of the
-  /// conversion functions in this class.
-  UnresolvedSetImpl *getConversionFunctions() {
-    return &data().Conversions;
-  }
-  const UnresolvedSetImpl *getConversionFunctions() const {
-    return &data().Conversions;
-  }
-
-  typedef UnresolvedSetImpl::iterator conversion_iterator;
+  typedef UnresolvedSetIterator conversion_iterator;
   conversion_iterator conversion_begin() const {
-    return getConversionFunctions()->begin();
+    return data().Conversions.begin();
   }
   conversion_iterator conversion_end() const {
-    return getConversionFunctions()->end();
+    return data().Conversions.end();
   }
 
   /// Removes a conversion function from this class.  The conversion
@@ -1035,7 +1004,8 @@ public:
 
   /// getVisibleConversionFunctions - get all conversion functions visible
   /// in current class; including conversion function templates.
-  const UnresolvedSetImpl *getVisibleConversionFunctions();
+  std::pair<conversion_iterator, conversion_iterator>
+    getVisibleConversionFunctions();
 
   /// isAggregate - Whether this class is an aggregate (C++
   /// [dcl.init.aggr]), which is a class with no user-declared
@@ -1047,10 +1017,26 @@ public:
   /// for non-static data members.
   bool hasInClassInitializer() const { return data().HasInClassInitializer; }
 
+  /// \brief Whether this class or any of its subobjects has any members of
+  /// reference type which would make value-initialization ill-formed, per
+  /// C++03 [dcl.init]p5:
+  ///  -- if T is a non-union class type without a user-declared constructor,
+  ///     then every non-static data member and base-class component of T is
+  ///     value-initialized
+  /// [...]
+  /// A program that calls for [...] value-initialization of an entity of
+  /// reference type is ill-formed.
+  bool hasUninitializedReferenceMember() const {
+    return !isUnion() && !hasUserDeclaredConstructor() &&
+           data().HasUninitializedReferenceMember;
+  }
+
   /// isPOD - Whether this class is a POD-type (C++ [class]p4), which is a class
   /// that is an aggregate that has no non-static non-POD data members, no
   /// reference data members, no user-defined copy assignment operator and no
   /// user-defined destructor.
+  ///
+  /// Note that this is the C++ TR1 definition of POD.
   bool isPOD() const { return data().PlainOldData; }
 
   /// \brief True if this class is C-like, without C++-specific features, e.g.
@@ -1079,64 +1065,110 @@ public:
   /// mutable field.
   bool hasMutableFields() const { return data().HasMutableFields; }
 
-  /// hasTrivialDefaultConstructor - Whether this class has a trivial default
-  /// constructor (C++11 [class.ctor]p5).
+  /// \brief Determine whether this class has a trivial default constructor
+  /// (C++11 [class.ctor]p5).
   bool hasTrivialDefaultConstructor() const {
-    return data().HasTrivialDefaultConstructor &&
-           (!data().UserDeclaredConstructor ||
-             data().DeclaredDefaultConstructor);
+    return hasDefaultConstructor() &&
+           (data().HasTrivialSpecialMembers & SMF_DefaultConstructor);
+  }
+
+  /// \brief Determine whether this class has a non-trivial default constructor
+  /// (C++11 [class.ctor]p5).
+  bool hasNonTrivialDefaultConstructor() const {
+    return (data().DeclaredNonTrivialSpecialMembers & SMF_DefaultConstructor) ||
+           (needsImplicitDefaultConstructor() &&
+            !(data().HasTrivialSpecialMembers & SMF_DefaultConstructor));
   }
 
-  /// hasConstexprNonCopyMoveConstructor - Whether this class has at least one
-  /// constexpr constructor other than the copy or move constructors.
+  /// \brief Determine whether this class has at least one constexpr constructor
+  /// other than the copy or move constructors.
   bool hasConstexprNonCopyMoveConstructor() const {
     return data().HasConstexprNonCopyMoveConstructor ||
-           (!hasUserDeclaredConstructor() &&
+           (needsImplicitDefaultConstructor() &&
             defaultedDefaultConstructorIsConstexpr());
   }
 
-  /// defaultedDefaultConstructorIsConstexpr - Whether a defaulted default
-  /// constructor for this class would be constexpr.
+  /// \brief Determine whether a defaulted default constructor for this class
+  /// would be constexpr.
   bool defaultedDefaultConstructorIsConstexpr() const {
     return data().DefaultedDefaultConstructorIsConstexpr &&
            (!isUnion() || hasInClassInitializer());
   }
 
-  /// hasConstexprDefaultConstructor - Whether this class has a constexpr
-  /// default constructor.
+  /// \brief Determine whether this class has a constexpr default constructor.
   bool hasConstexprDefaultConstructor() const {
     return data().HasConstexprDefaultConstructor ||
-           (!data().UserDeclaredConstructor &&
+           (needsImplicitDefaultConstructor() &&
             defaultedDefaultConstructorIsConstexpr());
   }
 
-  // hasTrivialCopyConstructor - Whether this class has a trivial copy
-  // constructor (C++ [class.copy]p6, C++0x [class.copy]p13)
+  /// \brief Determine whether this class has a trivial copy constructor
+  /// (C++ [class.copy]p6, C++11 [class.copy]p12)
   bool hasTrivialCopyConstructor() const {
-    return data().HasTrivialCopyConstructor;
+    return data().HasTrivialSpecialMembers & SMF_CopyConstructor;
+  }
+
+  /// \brief Determine whether this class has a non-trivial copy constructor
+  /// (C++ [class.copy]p6, C++11 [class.copy]p12)
+  bool hasNonTrivialCopyConstructor() const {
+    return data().DeclaredNonTrivialSpecialMembers & SMF_CopyConstructor ||
+           !hasTrivialCopyConstructor();
   }
 
-  // hasTrivialMoveConstructor - Whether this class has a trivial move
-  // constructor (C++0x [class.copy]p13)
+  /// \brief Determine whether this class has a trivial move constructor
+  /// (C++11 [class.copy]p12)
   bool hasTrivialMoveConstructor() const {
-    return data().HasTrivialMoveConstructor;
+    return hasMoveConstructor() &&
+           (data().HasTrivialSpecialMembers & SMF_MoveConstructor);
   }
 
-  // hasTrivialCopyAssignment - Whether this class has a trivial copy
-  // assignment operator (C++ [class.copy]p11, C++0x [class.copy]p27)
+  /// \brief Determine whether this class has a non-trivial move constructor
+  /// (C++11 [class.copy]p12)
+  bool hasNonTrivialMoveConstructor() const {
+    return (data().DeclaredNonTrivialSpecialMembers & SMF_MoveConstructor) ||
+           (needsImplicitMoveConstructor() &&
+            !(data().HasTrivialSpecialMembers & SMF_MoveConstructor));
+  }
+
+  /// \brief Determine whether this class has a trivial copy assignment operator
+  /// (C++ [class.copy]p11, C++11 [class.copy]p25)
   bool hasTrivialCopyAssignment() const {
-    return data().HasTrivialCopyAssignment;
+    return data().HasTrivialSpecialMembers & SMF_CopyAssignment;
+  }
+
+  /// \brief Determine whether this class has a non-trivial copy assignment
+  /// operator (C++ [class.copy]p11, C++11 [class.copy]p25)
+  bool hasNonTrivialCopyAssignment() const {
+    return data().DeclaredNonTrivialSpecialMembers & SMF_CopyAssignment ||
+           !hasTrivialCopyAssignment();
   }
 
-  // hasTrivialMoveAssignment - Whether this class has a trivial move
-  // assignment operator (C++0x [class.copy]p27)
+  /// \brief Determine whether this class has a trivial move assignment operator
+  /// (C++11 [class.copy]p25)
   bool hasTrivialMoveAssignment() const {
-    return data().HasTrivialMoveAssignment;
+    return hasMoveAssignment() &&
+           (data().HasTrivialSpecialMembers & SMF_MoveAssignment);
+  }
+
+  /// \brief Determine whether this class has a non-trivial move assignment
+  /// operator (C++11 [class.copy]p25)
+  bool hasNonTrivialMoveAssignment() const {
+    return (data().DeclaredNonTrivialSpecialMembers & SMF_MoveAssignment) ||
+           (needsImplicitMoveAssignment() &&
+            !(data().HasTrivialSpecialMembers & SMF_MoveAssignment));
   }
 
-  // hasTrivialDestructor - Whether this class has a trivial destructor
-  // (C++ [class.dtor]p3)
-  bool hasTrivialDestructor() const { return data().HasTrivialDestructor; }
+  /// \brief Determine whether this class has a trivial destructor
+  /// (C++ [class.dtor]p3)
+  bool hasTrivialDestructor() const {
+    return data().HasTrivialSpecialMembers & SMF_Destructor;
+  }
+
+  /// \brief Determine whether this class has a non-trivial destructor
+  /// (C++ [class.dtor]p3)
+  bool hasNonTrivialDestructor() const {
+    return !(data().HasTrivialSpecialMembers & SMF_Destructor);
+  }
 
   // hasIrrelevantDestructor - Whether this class has a destructor which has no
   // semantic effect. Any such destructor will be trivial, public, defaulted
@@ -1210,7 +1242,9 @@ public:
   /// \brief If this class is an instantiation of a member class of a
   /// class template specialization, retrieves the member specialization
   /// information.
-  MemberSpecializationInfo *getMemberSpecializationInfo() const;
+  MemberSpecializationInfo *getMemberSpecializationInfo() const {
+    return TemplateOrInstantiation.dyn_cast<MemberSpecializationInfo *>();
+  }
 
   /// \brief Specify that this record is an instantiation of the
   /// member class RD.
@@ -1256,6 +1290,10 @@ public:
     return dyn_cast<FunctionDecl>(getDeclContext());
   }
 
+  /// \brief Determine whether this dependent class is a current instantiation,
+  /// when viewed from within the given context.
+  bool isCurrentInstantiation(const DeclContext *CurContext) const;
+
   /// \brief Determine whether this class is derived from the class \p Base.
   ///
   /// This routine only determines whether this class is derived from \p Base,
@@ -1437,6 +1475,10 @@ public:
     return (PathAccess > DeclAccess ? PathAccess : DeclAccess);
   }
 
+  /// \brief Indicates that the declaration of a defaulted or deleted special
+  /// member function is now complete.
+  void finishedDefaultedOrDeletedMember(CXXMethodDecl *MD);
+
   /// \brief Indicates that the definition of this class is now complete.
   virtual void completeDefinition();
 
@@ -1490,6 +1532,9 @@ public:
     getLambdaData().ContextDecl = ContextDecl;
   }
 
+  /// \brief Returns the inheritance model used for this record.
+  MSInheritanceModel getMSInheritanceModel() const;
+
   /// \brief Determine whether this lambda expression was known to be dependent
   /// at the time it was created, even if its context does not appear to be
   /// dependent.
@@ -1528,11 +1573,10 @@ protected:
   CXXMethodDecl(Kind DK, CXXRecordDecl *RD, SourceLocation StartLoc,
                 const DeclarationNameInfo &NameInfo,
                 QualType T, TypeSourceInfo *TInfo,
-                bool isStatic, StorageClass SCAsWritten, bool isInline,
+                StorageClass SC, bool isInline,
                 bool isConstexpr, SourceLocation EndLocation)
     : FunctionDecl(DK, RD, StartLoc, NameInfo, T, TInfo,
-                   (isStatic ? SC_Static : SC_None),
-                   SCAsWritten, isInline, isConstexpr) {
+                   SC, isInline, isConstexpr) {
     if (EndLocation.isValid())
       setRangeEnd(EndLocation);
   }
@@ -1542,15 +1586,14 @@ public:
                                SourceLocation StartLoc,
                                const DeclarationNameInfo &NameInfo,
                                QualType T, TypeSourceInfo *TInfo,
-                               bool isStatic,
-                               StorageClass SCAsWritten,
+                               StorageClass SC,
                                bool isInline,
                                bool isConstexpr,
                                SourceLocation EndLocation);
 
   static CXXMethodDecl *CreateDeserialized(ASTContext &C, unsigned ID);
-  
-  bool isStatic() const { return getStorageClass() == SC_Static; }
+
+  bool isStatic() const;
   bool isInstance() const { return !isStatic(); }
 
   bool isConst() const { return getType()->castAs<FunctionType>()->isConst(); }
@@ -1958,7 +2001,7 @@ class CXXConstructorDecl : public CXXMethodDecl {
                      QualType T, TypeSourceInfo *TInfo,
                      bool isExplicitSpecified, bool isInline,
                      bool isImplicitlyDeclared, bool isConstexpr)
-    : CXXMethodDecl(CXXConstructor, RD, StartLoc, NameInfo, T, TInfo, false,
+    : CXXMethodDecl(CXXConstructor, RD, StartLoc, NameInfo, T, TInfo,
                     SC_None, isInline, isConstexpr, SourceLocation()),
       IsExplicitSpecified(isExplicitSpecified), ImplicitlyDefined(false),
       CtorInitializers(0), NumCtorInitializers(0) {
@@ -2077,7 +2120,7 @@ public:
   /// constructor (C++ [class.copy]p2, which can be used to copy the
   /// class. @p TypeQuals will be set to the qualifiers on the
   /// argument type. For example, @p TypeQuals would be set to @c
-  /// QualType::Const for the following copy constructor:
+  /// Qualifiers::Const for the following copy constructor:
   ///
   /// @code
   /// class X {
@@ -2177,7 +2220,7 @@ class CXXDestructorDecl : public CXXMethodDecl {
                     const DeclarationNameInfo &NameInfo,
                     QualType T, TypeSourceInfo *TInfo,
                     bool isInline, bool isImplicitlyDeclared)
-    : CXXMethodDecl(CXXDestructor, RD, StartLoc, NameInfo, T, TInfo, false,
+    : CXXMethodDecl(CXXDestructor, RD, StartLoc, NameInfo, T, TInfo,
                     SC_None, isInline, /*isConstexpr=*/false, SourceLocation()),
       ImplicitlyDefined(false), OperatorDelete(0) {
     setImplicit(isImplicitlyDeclared);
@@ -2244,7 +2287,7 @@ class CXXConversionDecl : public CXXMethodDecl {
                     QualType T, TypeSourceInfo *TInfo,
                     bool isInline, bool isExplicitSpecified,
                     bool isConstexpr, SourceLocation EndLocation)
-    : CXXMethodDecl(CXXConversion, RD, StartLoc, NameInfo, T, TInfo, false,
+    : CXXMethodDecl(CXXConversion, RD, StartLoc, NameInfo, T, TInfo,
                     SC_None, isInline, isConstexpr, EndLocation),
       IsExplicitSpecified(isExplicitSpecified) { }
 
diff --git a/include/clang/AST/DeclContextInternals.h b/include/clang/AST/DeclContextInternals.h
index 39f04c6..84f3698 100644
--- a/include/clang/AST/DeclContextInternals.h
+++ b/include/clang/AST/DeclContextInternals.h
@@ -15,10 +15,10 @@
 #define LLVM_CLANG_AST_DECLCONTEXTINTERNALS_H
 
 #include "clang/AST/Decl.h"
-#include "clang/AST/DeclarationName.h"
 #include "clang/AST/DeclCXX.h"
-#include "llvm/ADT/PointerUnion.h"
+#include "clang/AST/DeclarationName.h"
 #include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/PointerUnion.h"
 #include "llvm/ADT/SmallVector.h"
 #include <algorithm>
 
@@ -97,6 +97,22 @@ public:
              == Vec.end() && "list still contains decl");
   }
 
+  /// \brief Remove any declarations which were imported from an external
+  /// AST source.
+  void removeExternalDecls() {
+    if (isNull()) {
+      // Nothing to do.
+    } else if (NamedDecl *Singleton = getAsDecl()) {
+      if (Singleton->isFromASTFile())
+        *this = StoredDeclsList();
+    } else {
+      DeclsTy &Vec = *getAsVector();
+      Vec.erase(std::remove_if(Vec.begin(), Vec.end(),
+                               std::mem_fun(&Decl::isFromASTFile)),
+                Vec.end());
+    }
+  }
+
   /// getLookupResult - Return an array of all the decls that this list
   /// represents.
   DeclContext::lookup_result getLookupResult() {
@@ -117,7 +133,7 @@ public:
     DeclsTy &Vector = *getAsVector();
 
     // Otherwise, we have a range result.
-    return DeclContext::lookup_result(&Vector[0], &Vector[0]+Vector.size());
+    return DeclContext::lookup_result(Vector.begin(), Vector.end());
   }
 
   /// HandleRedeclaration - If this is a redeclaration of an existing decl,
@@ -186,7 +202,7 @@ public:
     // All other declarations go at the end of the list, but before any
     // tag declarations.  But we can be clever about tag declarations
     // because there can only ever be one in a scope.
-    } else if (Vec.back()->hasTagIdentifierNamespace()) {
+    } else if (!Vec.empty() && Vec.back()->hasTagIdentifierNamespace()) {
       NamedDecl *TagD = Vec.back();
       Vec.back() = D;
       Vec.push_back(TagD);
diff --git a/include/clang/AST/DeclFriend.h b/include/clang/AST/DeclFriend.h
index 37e4586..253c23c 100644
--- a/include/clang/AST/DeclFriend.h
+++ b/include/clang/AST/DeclFriend.h
@@ -54,22 +54,40 @@ private:
   /// True if this 'friend' declaration is unsupported.  Eventually we
   /// will support every possible friend declaration, but for now we
   /// silently ignore some and set this flag to authorize all access.
-  bool UnsupportedFriend;
+  bool UnsupportedFriend : 1;
+
+  // The number of "outer" template parameter lists in non-templatic
+  // (currently unsupported) friend type declarations, such as
+  //     template <class T> friend class A<T>::B;
+  unsigned NumTPLists : 31;
+
+  // The tail-allocated friend type template parameter lists (if any).
+  TemplateParameterList* const *getTPLists() const {
+    return reinterpret_cast<TemplateParameterList* const *>(this + 1);
+  }
+  TemplateParameterList **getTPLists() {
+    return reinterpret_cast<TemplateParameterList**>(this + 1);
+  }
 
   friend class CXXRecordDecl::friend_iterator;
   friend class CXXRecordDecl;
 
   FriendDecl(DeclContext *DC, SourceLocation L, FriendUnion Friend,
-             SourceLocation FriendL)
+             SourceLocation FriendL,
+             ArrayRef<TemplateParameterList*> FriendTypeTPLists)
     : Decl(Decl::Friend, DC, L),
       Friend(Friend),
       NextFriend(),
       FriendLoc(FriendL),
-      UnsupportedFriend(false) {
+      UnsupportedFriend(false),
+      NumTPLists(FriendTypeTPLists.size()) {
+    for (unsigned i = 0; i < NumTPLists; ++i)
+      getTPLists()[i] = FriendTypeTPLists[i];
   }
 
-  explicit FriendDecl(EmptyShell Empty)
-    : Decl(Decl::Friend, Empty), NextFriend() { }
+  FriendDecl(EmptyShell Empty, unsigned NumFriendTypeTPLists)
+    : Decl(Decl::Friend, Empty), NextFriend(),
+      NumTPLists(NumFriendTypeTPLists) { }
 
   FriendDecl *getNextFriend() {
     if (!NextFriend.isOffset())
@@ -81,8 +99,11 @@ private:
 public:
   static FriendDecl *Create(ASTContext &C, DeclContext *DC,
                             SourceLocation L, FriendUnion Friend_,
-                            SourceLocation FriendL);
-  static FriendDecl *CreateDeserialized(ASTContext &C, unsigned ID);
+                            SourceLocation FriendL,
+                            ArrayRef<TemplateParameterList*> FriendTypeTPLists
+                            = ArrayRef<TemplateParameterList*>());
+  static FriendDecl *CreateDeserialized(ASTContext &C, unsigned ID,
+                                        unsigned FriendTypeNumTPLists);
 
   /// If this friend declaration names an (untemplated but possibly
   /// dependent) type, return the type; otherwise return null.  This
@@ -91,6 +112,13 @@ public:
   TypeSourceInfo *getFriendType() const {
     return Friend.dyn_cast<TypeSourceInfo*>();
   }
+  unsigned getFriendTypeNumTemplateParameterLists() const {
+    return NumTPLists;
+  }
+  TemplateParameterList *getFriendTypeTemplateParameterList(unsigned N) const {
+    assert(N < NumTPLists);
+    return getTPLists()[N];
+  }
 
   /// If this friend declaration doesn't name a type, return the inner
   /// declaration.
@@ -114,8 +142,12 @@ public:
       }
       return SourceRange(getFriendLoc(), ND->getLocEnd());
     }
-    else if (TypeSourceInfo *TInfo = getFriendType())
-      return SourceRange(getFriendLoc(), TInfo->getTypeLoc().getEndLoc());
+    else if (TypeSourceInfo *TInfo = getFriendType()) {
+      SourceLocation StartL = (NumTPLists == 0)
+        ? getFriendLoc()
+        : getTPLists()[0]->getTemplateLoc();
+      return SourceRange(StartL, TInfo->getTypeLoc().getEndLoc());
+    }
     else
       return SourceRange(getFriendLoc(), getLocation());
   }
diff --git a/include/clang/AST/DeclLookups.h b/include/clang/AST/DeclLookups.h
index 867b465..4477c25 100644
--- a/include/clang/AST/DeclLookups.h
+++ b/include/clang/AST/DeclLookups.h
@@ -14,6 +14,7 @@
 #ifndef LLVM_CLANG_AST_DECLLOOKUPS_H
 #define LLVM_CLANG_AST_DECLLOOKUPS_H
 
+#include "clang/AST/ASTContext.h"
 #include "clang/AST/DeclBase.h"
 #include "clang/AST/DeclContextInternals.h"
 #include "clang/AST/DeclarationName.h"
diff --git a/include/clang/AST/DeclObjC.h b/include/clang/AST/DeclObjC.h
index 8b27dd8..c294922 100644
--- a/include/clang/AST/DeclObjC.h
+++ b/include/clang/AST/DeclObjC.h
@@ -159,6 +159,9 @@ private:
   /// method in the interface or its categories.
   unsigned IsOverriding : 1;
 
+  /// \brief Indicates if the method was a definition but its body was skipped.
+  unsigned HasSkippedBody : 1;
+
   // Result type of this method.
   QualType MethodDeclType;
 
@@ -238,7 +241,7 @@ private:
     IsDefined(isDefined), IsRedeclaration(0), HasRedeclaration(0),
     DeclImplementation(impControl), objcDeclQualifier(OBJC_TQ_None),
     RelatedResultType(HasRelatedResultType),
-    SelLocsKind(SelLoc_StandardNoSpace), IsOverriding(0),
+    SelLocsKind(SelLoc_StandardNoSpace), IsOverriding(0), HasSkippedBody(0),
     MethodDeclType(T), ResultTInfo(ResultTInfo),
     ParamsAndSelLocs(0), NumParams(0),
     DeclEndLoc(endLoc), Body(), SelfDecl(0), CmdDecl(0) {
@@ -429,6 +432,10 @@ public:
   void getOverriddenMethods(
                      SmallVectorImpl<const ObjCMethodDecl *> &Overridden) const;
 
+  /// \brief True if the method was a definition but its body was skipped.
+  bool hasSkippedBody() const { return HasSkippedBody; }
+  void setHasSkippedBody(bool Skipped = true) { HasSkippedBody = Skipped; }
+
   /// \brief Returns the property associated with this method's selector.
   ///
   /// Note that even if this particular method is not marked as a property
@@ -530,23 +537,29 @@ public:
   }
 
   // Get the local instance/class method declared in this interface.
-  ObjCMethodDecl *getMethod(Selector Sel, bool isInstance) const;
-  ObjCMethodDecl *getInstanceMethod(Selector Sel) const {
-    return getMethod(Sel, true/*isInstance*/);
+  ObjCMethodDecl *getMethod(Selector Sel, bool isInstance,
+                            bool AllowHidden = false) const;
+  ObjCMethodDecl *getInstanceMethod(Selector Sel,
+                                    bool AllowHidden = false) const {
+    return getMethod(Sel, true/*isInstance*/, AllowHidden);
   }
-  ObjCMethodDecl *getClassMethod(Selector Sel) const {
-    return getMethod(Sel, false/*isInstance*/);
+  ObjCMethodDecl *getClassMethod(Selector Sel, bool AllowHidden = false) const {
+    return getMethod(Sel, false/*isInstance*/, AllowHidden);
   }
+  bool HasUserDeclaredSetterMethod(const ObjCPropertyDecl *P) const;
   ObjCIvarDecl *getIvarDecl(IdentifierInfo *Id) const;
 
   ObjCPropertyDecl *FindPropertyDeclaration(IdentifierInfo *PropertyId) const;
 
   typedef llvm::DenseMap<IdentifierInfo*, ObjCPropertyDecl*> PropertyMap;
-
+  
+  typedef llvm::SmallVector<ObjCPropertyDecl*, 8> PropertyDeclOrder;
+  
   /// This routine collects list of properties to be implemented in the class.
   /// This includes, class's and its conforming protocols' properties.
   /// Note, the superclass's properties are not included in the list.
-  virtual void collectPropertiesToImplement(PropertyMap &PM) const {}
+  virtual void collectPropertiesToImplement(PropertyMap &PM,
+                                            PropertyDeclOrder &PO) const {}
 
   SourceLocation getAtStartLoc() const { return AtStart; }
   void setAtStartLoc(SourceLocation Loc) { AtStart = Loc; }
@@ -641,6 +654,10 @@ class ObjCInterfaceDecl : public ObjCContainerDecl
     /// completed by the external AST source when required.
     mutable bool ExternallyCompleted : 1;
 
+    /// \brief Indicates that the ivar cache does not yet include ivars
+    /// declared in the implementation.
+    mutable bool IvarListMissingImplementation : 1;
+
     /// \brief The location of the superclass, if any.
     SourceLocation SuperClassLoc;
     
@@ -650,7 +667,8 @@ class ObjCInterfaceDecl : public ObjCContainerDecl
     SourceLocation EndLoc; 
 
     DefinitionData() : Definition(), SuperClass(), CategoryList(), IvarList(), 
-                       ExternallyCompleted() { }
+                       ExternallyCompleted(),
+                       IvarListMissingImplementation(true) { }
   };
 
   ObjCInterfaceDecl(DeclContext *DC, SourceLocation atLoc, IdentifierInfo *Id,
@@ -661,11 +679,14 @@ class ObjCInterfaceDecl : public ObjCContainerDecl
 
   /// \brief Contains a pointer to the data associated with this class,
   /// which will be NULL if this class has not yet been defined.
-  DefinitionData *Data;
+  ///
+  /// The bit indicates when we don't need to check for out-of-date
+  /// declarations. It will be set unless modules are enabled.
+  llvm::PointerIntPair<DefinitionData *, 1, bool> Data;
 
   DefinitionData &data() const {
-    assert(Data != 0 && "Declaration has no definition!");
-    return *Data;
+    assert(Data.getPointer() && "Declaration has no definition!");
+    return *Data.getPointer();
   }
 
   /// \brief Allocate the definition data for this class.
@@ -673,7 +694,7 @@ class ObjCInterfaceDecl : public ObjCContainerDecl
   
   typedef Redeclarable<ObjCInterfaceDecl> redeclarable_base;
   virtual ObjCInterfaceDecl *getNextRedeclaration() { 
-    return RedeclLink.getNext(); 
+    return RedeclLink.getNext();
   }
   virtual ObjCInterfaceDecl *getPreviousDeclImpl() {
     return getPreviousDecl();
@@ -846,24 +867,38 @@ public:
   /// \brief Determine whether this particular declaration of this class is
   /// actually also a definition.
   bool isThisDeclarationADefinition() const { 
-    return Data && Data->Definition == this;
+    return getDefinition() == this;
   }
                           
   /// \brief Determine whether this class has been defined.
-  bool hasDefinition() const { return Data; }
+  bool hasDefinition() const {
+    // If the name of this class is out-of-date, bring it up-to-date, which
+    // might bring in a definition.
+    // Note: a null value indicates that we don't have a definition and that
+    // modules are enabled.
+    if (!Data.getOpaqueValue()) {
+      if (IdentifierInfo *II = getIdentifier()) {
+        if (II->isOutOfDate()) {
+          updateOutOfDate(*II);
+        }
+      }
+    }
+
+    return Data.getPointer();
+  }
                         
   /// \brief Retrieve the definition of this class, or NULL if this class 
   /// has been forward-declared (with \@class) but not yet defined (with 
   /// \@interface).
   ObjCInterfaceDecl *getDefinition() {
-    return hasDefinition()? Data->Definition : 0;
+    return hasDefinition()? Data.getPointer()->Definition : 0;
   }
 
   /// \brief Retrieve the definition of this class, or NULL if this class 
   /// has been forward-declared (with \@class) but not yet defined (with 
   /// \@interface).
   const ObjCInterfaceDecl *getDefinition() const {
-    return hasDefinition()? Data->Definition : 0;
+    return hasDefinition()? Data.getPointer()->Definition : 0;
   }
 
   /// \brief Starts the definition of this Objective-C class, taking it from
@@ -887,7 +922,166 @@ public:
                                               : superCls; 
   }
 
-  ObjCCategoryDecl* getCategoryList() const {
+  /// \brief Iterator that walks over the list of categories, filtering out
+  /// those that do not meet specific criteria.
+  ///
+  /// This class template is used for the various permutations of category
+  /// and extension iterators.
+  template<bool (*Filter)(ObjCCategoryDecl *)>
+  class filtered_category_iterator {
+    ObjCCategoryDecl *Current;
+
+    void findAcceptableCategory();
+    
+  public:
+    typedef ObjCCategoryDecl *      value_type;
+    typedef value_type              reference;
+    typedef value_type              pointer;
+    typedef std::ptrdiff_t          difference_type;
+    typedef std::input_iterator_tag iterator_category;
+
+    filtered_category_iterator() : Current(0) { }
+    explicit filtered_category_iterator(ObjCCategoryDecl *Current)
+      : Current(Current)
+    {
+      findAcceptableCategory();
+    }
+
+    reference operator*() const { return Current; }
+    pointer operator->() const { return Current; }
+
+    filtered_category_iterator &operator++();
+
+    filtered_category_iterator operator++(int) {
+      filtered_category_iterator Tmp = *this;
+      ++(*this);
+      return Tmp;
+    }
+
+    friend bool operator==(filtered_category_iterator X,
+                           filtered_category_iterator Y) {
+      return X.Current == Y.Current;
+    }
+
+    friend bool operator!=(filtered_category_iterator X,
+                           filtered_category_iterator Y) {
+      return X.Current != Y.Current;
+    }
+  };
+
+private:
+  /// \brief Test whether the given category is visible.
+  ///
+  /// Used in the \c visible_categories_iterator.
+  static bool isVisibleCategory(ObjCCategoryDecl *Cat);
+                        
+public:
+  /// \brief Iterator that walks over the list of categories and extensions
+  /// that are visible, i.e., not hidden in a non-imported submodule.
+  typedef filtered_category_iterator<isVisibleCategory>
+    visible_categories_iterator;
+
+  /// \brief Retrieve an iterator to the beginning of the visible-categories
+  /// list.
+  visible_categories_iterator visible_categories_begin() const {
+    return visible_categories_iterator(getCategoryListRaw());
+  }
+
+  /// \brief Retrieve an iterator to the end of the visible-categories list.
+  visible_categories_iterator visible_categories_end() const {
+    return visible_categories_iterator();
+  }
+
+  /// \brief Determine whether the visible-categories list is empty.
+  bool visible_categories_empty() const {
+    return visible_categories_begin() == visible_categories_end();
+  }
+
+private:
+  /// \brief Test whether the given category... is a category.
+  ///
+  /// Used in the \c known_categories_iterator.
+  static bool isKnownCategory(ObjCCategoryDecl *) { return true; }
+
+public:
+  /// \brief Iterator that walks over all of the known categories and
+  /// extensions, including those that are hidden.
+  typedef filtered_category_iterator<isKnownCategory> known_categories_iterator;
+
+  /// \brief Retrieve an iterator to the beginning of the known-categories
+  /// list.
+  known_categories_iterator known_categories_begin() const {
+    return known_categories_iterator(getCategoryListRaw());
+  }
+
+  /// \brief Retrieve an iterator to the end of the known-categories list.
+  known_categories_iterator known_categories_end() const {
+    return known_categories_iterator();
+  }
+
+  /// \brief Determine whether the known-categories list is empty.
+  bool known_categories_empty() const {
+    return known_categories_begin() == known_categories_end();
+  }
+
+private:
+  /// \brief Test whether the given category is a visible extension.
+  ///
+  /// Used in the \c visible_extensions_iterator.
+  static bool isVisibleExtension(ObjCCategoryDecl *Cat);
+
+public:
+  /// \brief Iterator that walks over all of the visible extensions, skipping
+  /// any that are known but hidden.
+  typedef filtered_category_iterator<isVisibleExtension>
+    visible_extensions_iterator;
+
+  /// \brief Retrieve an iterator to the beginning of the visible-extensions
+  /// list.
+  visible_extensions_iterator visible_extensions_begin() const {
+    return visible_extensions_iterator(getCategoryListRaw());
+  }
+
+  /// \brief Retrieve an iterator to the end of the visible-extensions list.
+  visible_extensions_iterator visible_extensions_end() const {
+    return visible_extensions_iterator();
+  }
+
+  /// \brief Determine whether the visible-extensions list is empty.
+  bool visible_extensions_empty() const {
+    return visible_extensions_begin() == visible_extensions_end();
+  }
+
+private:
+  /// \brief Test whether the given category is an extension.
+  ///
+  /// Used in the \c known_extensions_iterator.
+  static bool isKnownExtension(ObjCCategoryDecl *Cat);
+  
+public:
+  /// \brief Iterator that walks over all of the known extensions.
+  typedef filtered_category_iterator<isKnownExtension>
+    known_extensions_iterator;
+
+  /// \brief Retrieve an iterator to the beginning of the known-extensions
+  /// list.
+  known_extensions_iterator known_extensions_begin() const {
+    return known_extensions_iterator(getCategoryListRaw());
+  }
+  
+  /// \brief Retrieve an iterator to the end of the known-extensions list.
+  known_extensions_iterator known_extensions_end() const {
+    return known_extensions_iterator();
+  }
+
+  /// \brief Determine whether the known-extensions list is empty.
+  bool known_extensions_empty() const {
+    return known_extensions_begin() == known_extensions_end();
+  }
+
+  /// \brief Retrieve the raw pointer to the start of the category/extension
+  /// list.
+  ObjCCategoryDecl* getCategoryListRaw() const {
     // FIXME: Should make sure no callers ever do this.
     if (!hasDefinition())
       return 0;
@@ -898,16 +1092,17 @@ public:
     return data().CategoryList;
   }
 
-  void setCategoryList(ObjCCategoryDecl *category) {
+  /// \brief Set the raw pointer to the start of the category/extension
+  /// list.
+  void setCategoryListRaw(ObjCCategoryDecl *category) {
     data().CategoryList = category;
   }
 
-  ObjCCategoryDecl* getFirstClassExtension() const;
-
   ObjCPropertyDecl
     *FindPropertyVisibleInPrimaryClass(IdentifierInfo *PropertyId) const;
 
-  virtual void collectPropertiesToImplement(PropertyMap &PM) const;
+  virtual void collectPropertiesToImplement(PropertyMap &PM,
+                                            PropertyDeclOrder &PO) const;
 
   /// isSuperClassOf - Return true if this class is the specified class or is a
   /// super class of the specified interface class.
@@ -924,28 +1119,12 @@ public:
 
   /// isArcWeakrefUnavailable - Checks for a class or one of its super classes
   /// to be incompatible with __weak references. Returns true if it is.
-  bool isArcWeakrefUnavailable() const {
-    const ObjCInterfaceDecl *Class = this;
-    while (Class) {
-      if (Class->hasAttr<ArcWeakrefUnavailableAttr>())
-        return true;
-      Class = Class->getSuperClass();
-   }
-   return false;
-  }
+  bool isArcWeakrefUnavailable() const;
 
   /// isObjCRequiresPropertyDefs - Checks that a class or one of its super 
   /// classes must not be auto-synthesized. Returns class decl. if it must not
   /// be; 0, otherwise.
-  const ObjCInterfaceDecl *isObjCRequiresPropertyDefs() const {
-    const ObjCInterfaceDecl *Class = this;
-    while (Class) {
-      if (Class->hasAttr<ObjCRequiresPropertyDefsAttr>())
-        return Class;
-      Class = Class->getSuperClass();
-   }
-   return 0;
-  }
+  const ObjCInterfaceDecl *isObjCRequiresPropertyDefs() const;
 
   ObjCIvarDecl *lookupInstanceVariable(IdentifierInfo *IVarName,
                                        ObjCInterfaceDecl *&ClassDeclared);
@@ -992,7 +1171,7 @@ public:
   /// ObjCInterfaceDecl node. This is for legacy objective-c \@implementation
   /// declaration without an \@interface declaration.
   bool isImplicitInterfaceDecl() const { 
-    return hasDefinition() ? Data->Definition->isImplicit() : isImplicit(); 
+    return hasDefinition() ? data().Definition->isImplicit() : isImplicit();
   }
 
   /// ClassImplementsProtocol - Checks that 'lProto' protocol
@@ -1169,12 +1348,17 @@ class ObjCProtocolDecl : public ObjCContainerDecl,
     /// \brief Referenced protocols
     ObjCProtocolList ReferencedProtocols;    
   };
-  
-  DefinitionData *Data;
+
+  /// \brief Contains a pointer to the data associated with this class,
+  /// which will be NULL if this class has not yet been defined.
+  ///
+  /// The bit indicates when we don't need to check for out-of-date
+  /// declarations. It will be set unless modules are enabled.
+  llvm::PointerIntPair<DefinitionData *, 1, bool> Data;
 
   DefinitionData &data() const {
-    assert(Data && "Objective-C protocol has no definition!");
-    return *Data;
+    assert(Data.getPointer() && "Objective-C protocol has no definition!");
+    return *Data.getPointer();
   }
   
   ObjCProtocolDecl(DeclContext *DC, IdentifierInfo *Id,
@@ -1193,7 +1377,7 @@ class ObjCProtocolDecl : public ObjCContainerDecl,
   virtual ObjCProtocolDecl *getMostRecentDeclImpl() {
     return getMostRecentDecl();
   }
-                           
+
 public:
   static ObjCProtocolDecl *Create(ASTContext &C, DeclContext *DC,
                                   IdentifierInfo *Id,
@@ -1244,7 +1428,7 @@ public:
   /// implements.
   void setProtocolList(ObjCProtocolDecl *const*List, unsigned Num,
                        const SourceLocation *Locs, ASTContext &C) {
-    assert(Data && "Protocol is not defined");
+    assert(hasDefinition() && "Protocol is not defined");
     data().ReferencedProtocols.set(List, Num, Locs, C);
   }
 
@@ -1261,16 +1445,30 @@ public:
   }
 
   /// \brief Determine whether this protocol has a definition.
-  bool hasDefinition() const { return Data != 0; }
+  bool hasDefinition() const {
+    // If the name of this protocol is out-of-date, bring it up-to-date, which
+    // might bring in a definition.
+    // Note: a null value indicates that we don't have a definition and that
+    // modules are enabled.
+    if (!Data.getOpaqueValue()) {
+      if (IdentifierInfo *II = getIdentifier()) {
+        if (II->isOutOfDate()) {
+          updateOutOfDate(*II);
+        }
+      }
+    }
+
+    return Data.getPointer();
+  }
 
   /// \brief Retrieve the definition of this protocol, if any.
   ObjCProtocolDecl *getDefinition() {
-    return Data? Data->Definition : 0;
+    return hasDefinition()? Data.getPointer()->Definition : 0;
   }
 
   /// \brief Retrieve the definition of this protocol, if any.
   const ObjCProtocolDecl *getDefinition() const {
-    return Data? Data->Definition : 0;
+    return hasDefinition()? Data.getPointer()->Definition : 0;
   }
 
   /// \brief Determine whether this particular declaration is also the 
@@ -1303,7 +1501,8 @@ public:
     return getFirstDeclaration();
   }
 
-  virtual void collectPropertiesToImplement(PropertyMap &PM) const;
+  virtual void collectPropertiesToImplement(PropertyMap &PM,
+                                            PropertyDeclOrder &PO) const;
 
   static bool classof(const Decl *D) { return classofKind(D->getKind()); }
   static bool classofKind(Kind K) { return K == ObjCProtocol; }
@@ -1360,6 +1559,7 @@ class ObjCCategoryDecl : public ObjCContainerDecl {
       CategoryNameLoc(CategoryNameLoc),
       IvarLBraceLoc(IvarLBraceLoc), IvarRBraceLoc(IvarRBraceLoc) {
   }
+
 public:
 
   static ObjCCategoryDecl *Create(ASTContext &C, DeclContext *DC,
@@ -1403,8 +1603,13 @@ public:
 
   ObjCCategoryDecl *getNextClassCategory() const { return NextClassCategory; }
 
+  /// \brief Retrieve the pointer to the next stored category (or extension),
+  /// which may be hidden.
+  ObjCCategoryDecl *getNextClassCategoryRaw() const {
+    return NextClassCategory;
+  }
+
   bool IsClassExtension() const { return getIdentifier() == 0; }
-  const ObjCCategoryDecl *getNextClassExtension() const;
 
   typedef specific_decl_iterator<ObjCIvarDecl> ivar_iterator;
   ivar_iterator ivar_begin() const {
@@ -1847,7 +2052,7 @@ public:
     PropertyAttributesAsWritten = PRVal;
   }
 
- void makeitReadWriteAttribute(void) {
+ void makeitReadWriteAttribute() {
     PropertyAttributes &= ~OBJC_PR_readonly;
     PropertyAttributes |= OBJC_PR_readwrite;
  }
@@ -2039,5 +2244,33 @@ public:
   friend class ASTDeclReader;
 };
 
+template<bool (*Filter)(ObjCCategoryDecl *)>
+void
+ObjCInterfaceDecl::filtered_category_iterator<Filter>::
+findAcceptableCategory() {
+  while (Current && !Filter(Current))
+    Current = Current->getNextClassCategoryRaw();
+}
+
+template<bool (*Filter)(ObjCCategoryDecl *)>
+inline ObjCInterfaceDecl::filtered_category_iterator<Filter> &
+ObjCInterfaceDecl::filtered_category_iterator<Filter>::operator++() {
+  Current = Current->getNextClassCategoryRaw();
+  findAcceptableCategory();
+  return *this;
+}
+
+inline bool ObjCInterfaceDecl::isVisibleCategory(ObjCCategoryDecl *Cat) {
+  return !Cat->isHidden();
+}
+
+inline bool ObjCInterfaceDecl::isVisibleExtension(ObjCCategoryDecl *Cat) {
+  return Cat->IsClassExtension() && !Cat->isHidden();
+}
+
+inline bool ObjCInterfaceDecl::isKnownExtension(ObjCCategoryDecl *Cat) {
+  return Cat->IsClassExtension();
+}
+
 }  // end namespace clang
 #endif
diff --git a/include/clang/AST/DeclOpenMP.h b/include/clang/AST/DeclOpenMP.h
new file mode 100644
index 0000000..ca92040
--- /dev/null
+++ b/include/clang/AST/DeclOpenMP.h
@@ -0,0 +1,83 @@
+//===--- OpenMP.h - Classes for representing OpenMP directives ---*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief This file defines OpenMP nodes.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_AST_OPENMP_H
+#define LLVM_CLANG_AST_OPENMP_H
+
+#include "clang/AST/DeclBase.h"
+#include "llvm/ADT/ArrayRef.h"
+
+namespace clang {
+
+class DeclRefExpr;
+
+/// \brief This represents '#pragma omp threadprivate ...' directive.
+/// For example, in the following, both 'a' and 'A::b' are threadprivate:
+///
+/// \code
+/// int a;
+/// #pragma omp threadprivate(a)
+/// struct A {
+///   static int b;
+/// #pragma omp threadprivate(b)
+/// };
+/// \endcode
+///
+class OMPThreadPrivateDecl : public Decl {
+  friend class ASTDeclReader;
+  unsigned NumVars;
+
+  virtual void anchor();
+
+  OMPThreadPrivateDecl(Kind DK, DeclContext *DC, SourceLocation L) :
+    Decl(DK, DC, L), NumVars(0) { }
+
+  ArrayRef<const DeclRefExpr *> getVars() const {
+    return ArrayRef<const DeclRefExpr *>(
+                   reinterpret_cast<const DeclRefExpr * const *>(this + 1),
+                   NumVars);
+  }
+
+  llvm::MutableArrayRef<DeclRefExpr *> getVars() {
+    return llvm::MutableArrayRef<DeclRefExpr *>(
+                                 reinterpret_cast<DeclRefExpr **>(this + 1),
+                                 NumVars);
+  }
+
+  void setVars(ArrayRef<DeclRefExpr *> VL);
+
+public:
+  static OMPThreadPrivateDecl *Create(ASTContext &C, DeclContext *DC,
+                                      SourceLocation L,
+                                      ArrayRef<DeclRefExpr *> VL);
+  static OMPThreadPrivateDecl *CreateDeserialized(ASTContext &C,
+                                                  unsigned ID, unsigned N);
+
+  typedef llvm::MutableArrayRef<DeclRefExpr *>::iterator varlist_iterator;
+  typedef ArrayRef<const DeclRefExpr *>::iterator varlist_const_iterator;
+
+  unsigned varlist_size() const { return NumVars; }
+  bool varlist_empty() const { return NumVars == 0; }
+  varlist_iterator varlist_begin() { return getVars().begin(); }
+  varlist_iterator varlist_end() { return getVars().end(); }
+  varlist_const_iterator varlist_begin() const { return getVars().begin(); }
+  varlist_const_iterator varlist_end() const { return getVars().end(); }
+
+  static bool classof(const Decl *D) { return classofKind(D->getKind()); }
+  static bool classofKind(Kind K) { return K == OMPThreadPrivate; }
+};
+
+}  // end namespace clang
+
+#endif
diff --git a/include/clang/AST/DeclTemplate.h b/include/clang/AST/DeclTemplate.h
index 8620116..425a617 100644
--- a/include/clang/AST/DeclTemplate.h
+++ b/include/clang/AST/DeclTemplate.h
@@ -84,6 +84,13 @@ public:
 
   unsigned size() const { return NumParams; }
 
+  llvm::ArrayRef<NamedDecl*> asArray() {
+    return llvm::ArrayRef<NamedDecl*>(begin(), size());
+  }
+  llvm::ArrayRef<const NamedDecl*> asArray() const {
+    return llvm::ArrayRef<const NamedDecl*>(begin(), size());
+  }
+
   NamedDecl* getParam(unsigned Idx) {
     assert(Idx < size() && "Template parameter index out-of-range");
     return begin()[Idx];
@@ -193,6 +200,11 @@ public:
   /// \brief Retrieve the template argument at a given index.
   const TemplateArgument &operator[](unsigned Idx) const { return get(Idx); }
 
+  /// \brief Produce this as an array ref.
+  llvm::ArrayRef<TemplateArgument> asArray() const {
+    return llvm::ArrayRef<TemplateArgument>(data(), size());
+  }
+
   /// \brief Retrieve the number of template arguments in this
   /// template argument list.
   unsigned size() const { return NumArguments; }
@@ -324,6 +336,23 @@ public:
     return getTemplateSpecializationKind() == TSK_ExplicitSpecialization;
   }
 
+  /// \brief True if this declaration is an explicit specialization,
+  /// explicit instantiation declaration, or explicit instantiation
+  /// definition.
+  bool isExplicitInstantiationOrSpecialization() const {
+    switch (getTemplateSpecializationKind()) {
+    case TSK_ExplicitSpecialization:
+    case TSK_ExplicitInstantiationDeclaration:
+    case TSK_ExplicitInstantiationDefinition:
+      return true;
+
+    case TSK_Undeclared:
+    case TSK_ImplicitInstantiation:
+      return false;
+    }
+    llvm_unreachable("bad template specialization kind");
+  }
+
   /// \brief Set the template specialization kind.
   void setTemplateSpecializationKind(TemplateSpecializationKind TSK) {
     assert(TSK != TSK_Undeclared &&
@@ -390,6 +419,10 @@ public:
     return (TemplateSpecializationKind)(MemberAndTSK.getInt() + 1);
   }
 
+  bool isExplicitSpecialization() const {
+    return getTemplateSpecializationKind() == TSK_ExplicitSpecialization;
+  }
+
   /// \brief Set the template specialization kind.
   void setTemplateSpecializationKind(TemplateSpecializationKind TSK) {
     assert(TSK != TSK_Undeclared &&
@@ -425,18 +458,19 @@ public:
 ///   };
 /// \endcode
 class DependentFunctionTemplateSpecializationInfo {
+  struct CA {
+    /// The number of potential template candidates.
+    unsigned NumTemplates;
+
+    /// The number of template arguments.
+    unsigned NumArgs;
+  };
+
   union {
     // Force sizeof to be a multiple of sizeof(void*) so that the
     // trailing data is aligned.
     void *Aligner;
-
-    struct {
-      /// The number of potential template candidates.
-      unsigned NumTemplates;
-
-      /// The number of template arguments.
-      unsigned NumArgs;
-    } d;
+    struct CA d;
   };
 
   /// The locations of the left and right angle brackets.
@@ -552,7 +586,7 @@ protected:
   };
 
   template <typename EntryType>
-  SpecIterator<EntryType>
+  static SpecIterator<EntryType>
   makeSpecIterator(llvm::FoldingSetVector<EntryType> &Specs, bool isEnd) {
     return SpecIterator<EntryType>(isEnd ? Specs.end() : Specs.begin());
   }
@@ -576,14 +610,14 @@ protected:
 
   /// \brief Pointer to the common data shared by all declarations of this
   /// template.
-  CommonBase *Common;
+  mutable CommonBase *Common;
   
   /// \brief Retrieves the "common" pointer shared by all (re-)declarations of
   /// the same template. Calling this routine may implicitly allocate memory
   /// for the common pointer.
-  CommonBase *getCommonPtr();
+  CommonBase *getCommonPtr() const;
 
-  virtual CommonBase *newCommon(ASTContext &C) = 0;
+  virtual CommonBase *newCommon(ASTContext &C) const = 0;
 
   // Construct a template decl with name, parameters, and templated element.
   RedeclarableTemplateDecl(Kind DK, DeclContext *DC, SourceLocation L,
@@ -618,7 +652,7 @@ public:
   /// template<> template<typename T>
   /// struct X<int>::Inner { /* ... */ };
   /// \endcode
-  bool isMemberSpecialization() {
+  bool isMemberSpecialization() const {
     return getCommonPtr()->InstantiatedFromMember.getInt();
   }
 
@@ -665,7 +699,7 @@ public:
   /// template<typename U>
   /// void X<T>::f(T, U);
   /// \endcode
-  RedeclarableTemplateDecl *getInstantiatedFromMemberTemplate() {
+  RedeclarableTemplateDecl *getInstantiatedFromMemberTemplate() const {
     return getCommonPtr()->InstantiatedFromMember.getPointer();
   }
 
@@ -729,9 +763,9 @@ protected:
                        TemplateParameterList *Params, NamedDecl *Decl)
     : RedeclarableTemplateDecl(FunctionTemplate, DC, L, Name, Params, Decl) { }
 
-  CommonBase *newCommon(ASTContext &C);
+  CommonBase *newCommon(ASTContext &C) const;
 
-  Common *getCommonPtr() {
+  Common *getCommonPtr() const {
     return static_cast<Common *>(RedeclarableTemplateDecl::getCommonPtr());
   }
 
@@ -740,7 +774,7 @@ protected:
   /// \brief Retrieve the set of function template specializations of this
   /// function template.
   llvm::FoldingSetVector<FunctionTemplateSpecializationInfo> &
-  getSpecializations() {
+  getSpecializations() const {
     return getCommonPtr()->Specializations;
   }
 
@@ -798,11 +832,11 @@ public:
 
   typedef SpecIterator<FunctionTemplateSpecializationInfo> spec_iterator;
 
-  spec_iterator spec_begin() {
+  spec_iterator spec_begin() const {
     return makeSpecIterator(getSpecializations(), false);
   }
 
-  spec_iterator spec_end() {
+  spec_iterator spec_end() const {
     return makeSpecIterator(getSpecializations(), true);
   }
 
@@ -1205,7 +1239,7 @@ public:
                                           unsigned P,
                                           IdentifierInfo *Id,
                                           TemplateParameterList *Params,
-                             llvm::ArrayRef<TemplateParameterList*> Expansions);
+                                 ArrayRef<TemplateParameterList *> Expansions);
 
   static TemplateTemplateParmDecl *CreateDeserialized(ASTContext &C,
                                                       unsigned ID);
@@ -1399,7 +1433,7 @@ public:
   static ClassTemplateSpecializationDecl *
   CreateDeserialized(ASTContext &C, unsigned ID);
 
-  virtual void getNameForDiagnostic(std::string &S,
+  virtual void getNameForDiagnostic(raw_ostream &OS,
                                     const PrintingPolicy &Policy,
                                     bool Qualified) const;
 
@@ -1433,6 +1467,23 @@ public:
     return getSpecializationKind() == TSK_ExplicitSpecialization;
   }
 
+  /// \brief True if this declaration is an explicit specialization,
+  /// explicit instantiation declaration, or explicit instantiation
+  /// definition.
+  bool isExplicitInstantiationOrSpecialization() const {
+    switch (getTemplateSpecializationKind()) {
+    case TSK_ExplicitSpecialization:
+    case TSK_ExplicitInstantiationDeclaration:
+    case TSK_ExplicitInstantiationDefinition:
+      return true;
+
+    case TSK_Undeclared:
+    case TSK_ImplicitInstantiation:
+      return false;
+    }
+    llvm_unreachable("bad template specialization kind");
+  }
+
   void setSpecializationKind(TemplateSpecializationKind TSK) {
     SpecializationKind = TSK;
   }
@@ -1464,8 +1515,7 @@ public:
           = SpecializedTemplate.dyn_cast<SpecializedPartialSpecialization*>())
       return PartialSpec->PartialSpecialization;
 
-    return const_cast<ClassTemplateDecl*>(
-                             SpecializedTemplate.get<ClassTemplateDecl*>());
+    return SpecializedTemplate.get<ClassTemplateDecl*>();
   }
 
   /// \brief Retrieve the class template or class template partial
@@ -1477,8 +1527,7 @@ public:
           = SpecializedTemplate.dyn_cast<SpecializedPartialSpecialization*>())
       return PartialSpec->PartialSpecialization;
 
-    return const_cast<ClassTemplateDecl*>(
-                             SpecializedTemplate.get<ClassTemplateDecl*>());
+    return SpecializedTemplate.get<ClassTemplateDecl*>();
   }
 
   /// \brief Retrieve the set of template arguments that should be used
@@ -1780,10 +1829,11 @@ protected:
   };
 
   /// \brief Load any lazily-loaded specializations from the external source.
-  void LoadLazySpecializations();
+  void LoadLazySpecializations() const;
 
   /// \brief Retrieve the set of specializations of this class template.
-  llvm::FoldingSetVector<ClassTemplateSpecializationDecl> &getSpecializations();
+  llvm::FoldingSetVector<ClassTemplateSpecializationDecl> &
+  getSpecializations() const;
 
   /// \brief Retrieve the set of partial specializations of this class
   /// template.
@@ -1798,9 +1848,9 @@ protected:
     : RedeclarableTemplateDecl(ClassTemplate, 0, SourceLocation(),
                                DeclarationName(), 0, 0) { }
 
-  CommonBase *newCommon(ASTContext &C);
+  CommonBase *newCommon(ASTContext &C) const;
 
-  Common *getCommonPtr() {
+  Common *getCommonPtr() const {
     return static_cast<Common *>(RedeclarableTemplateDecl::getCommonPtr());
   }
 
@@ -1925,11 +1975,11 @@ public:
 
   typedef SpecIterator<ClassTemplateSpecializationDecl> spec_iterator;
 
-  spec_iterator spec_begin() {
+  spec_iterator spec_begin() const {
     return makeSpecIterator(getSpecializations(), false);
   }
 
-  spec_iterator spec_end() {
+  spec_iterator spec_end() const {
     return makeSpecIterator(getSpecializations(), true);
   }
 
@@ -2063,7 +2113,7 @@ protected:
                         TemplateParameterList *Params, NamedDecl *Decl)
     : RedeclarableTemplateDecl(TypeAliasTemplate, DC, L, Name, Params, Decl) { }
 
-  CommonBase *newCommon(ASTContext &C);
+  CommonBase *newCommon(ASTContext &C) const;
 
   Common *getCommonPtr() {
     return static_cast<Common *>(RedeclarableTemplateDecl::getCommonPtr());
diff --git a/include/clang/AST/DeclVisitor.h b/include/clang/AST/DeclVisitor.h
index 62654b8..4eaae35 100644
--- a/include/clang/AST/DeclVisitor.h
+++ b/include/clang/AST/DeclVisitor.h
@@ -14,21 +14,28 @@
 #define LLVM_CLANG_AST_DECLVISITOR_H
 
 #include "clang/AST/Decl.h"
-#include "clang/AST/DeclObjC.h"
 #include "clang/AST/DeclCXX.h"
 #include "clang/AST/DeclFriend.h"
+#include "clang/AST/DeclObjC.h"
+#include "clang/AST/DeclOpenMP.h"
 #include "clang/AST/DeclTemplate.h"
 
 namespace clang {
+namespace declvisitor {
 
-#define DISPATCH(NAME, CLASS) \
-  return static_cast<ImplClass*>(this)-> Visit##NAME(static_cast<CLASS*>(D))
+template <typename T> struct make_ptr       { typedef       T *type; };
+template <typename T> struct make_const_ptr { typedef const T *type; };
 
 /// \brief A simple visitor class that helps create declaration visitors.
-template<typename ImplClass, typename RetTy=void>
-class DeclVisitor {
+template<template <typename> class Ptr, typename ImplClass, typename RetTy=void>
+class Base {
 public:
-  RetTy Visit(Decl *D) {
+
+#define PTR(CLASS) typename Ptr<CLASS>::type
+#define DISPATCH(NAME, CLASS) \
+  return static_cast<ImplClass*>(this)->Visit##NAME(static_cast<PTR(CLASS)>(D))
+
+  RetTy Visit(PTR(Decl) D) {
     switch (D->getKind()) {
 #define DECL(DERIVED, BASE) \
       case Decl::DERIVED: DISPATCH(DERIVED##Decl, DERIVED##Decl);
@@ -41,13 +48,31 @@ public:
   // If the implementation chooses not to implement a certain visit
   // method, fall back to the parent.
 #define DECL(DERIVED, BASE) \
-  RetTy Visit##DERIVED##Decl(DERIVED##Decl *D) { DISPATCH(BASE, BASE); }
+  RetTy Visit##DERIVED##Decl(PTR(DERIVED##Decl) D) { DISPATCH(BASE, BASE); }
 #include "clang/AST/DeclNodes.inc"
 
-  RetTy VisitDecl(Decl *D) { return RetTy(); }
-};
+  RetTy VisitDecl(PTR(Decl) D) { return RetTy(); }
 
+#undef PTR
 #undef DISPATCH
+};
+
+} // end namespace declvisitor
+
+/// \brief A simple visitor class that helps create declaration visitors.
+///
+/// This class does not preserve constness of Decl pointers (see also
+/// ConstDeclVisitor).
+template<typename ImplClass, typename RetTy=void>
+class DeclVisitor
+ : public declvisitor::Base<declvisitor::make_ptr, ImplClass, RetTy> {};
+
+/// \brief A simple visitor class that helps create declaration visitors.
+///
+/// This class preserves constness of Decl pointers (see also DeclVisitor).
+template<typename ImplClass, typename RetTy=void>
+class ConstDeclVisitor
+ : public declvisitor::Base<declvisitor::make_const_ptr, ImplClass, RetTy> {};
 
 }  // end namespace clang
 
diff --git a/include/clang/AST/DeclarationName.h b/include/clang/AST/DeclarationName.h
index d991c73..f28882b 100644
--- a/include/clang/AST/DeclarationName.h
+++ b/include/clang/AST/DeclarationName.h
@@ -14,8 +14,6 @@
 #define LLVM_CLANG_AST_DECLARATIONNAME_H
 
 #include "clang/Basic/IdentifierTable.h"
-#include "clang/AST/Type.h"
-#include "clang/AST/CanonicalType.h"
 #include "clang/Basic/PartialDiagnostic.h"
 #include "llvm/Support/Compiler.h"
 
@@ -24,14 +22,20 @@ namespace llvm {
 }
 
 namespace clang {
-  class CXXSpecialName;
-  class CXXOperatorIdName;
+  class ASTContext;
   class CXXLiteralOperatorIdName;
+  class CXXOperatorIdName;
+  class CXXSpecialName;
   class DeclarationNameExtra;
   class IdentifierInfo;
   class MultiKeywordSelector;
-  class UsingDirectiveDecl;
+  class QualType;
+  class Type;
   class TypeSourceInfo;
+  class UsingDirectiveDecl;
+
+  template <typename> class CanQual;
+  typedef CanQual<Type> CanQualType;
 
 /// DeclarationName - The name of a declaration. In the common case,
 /// this just stores an IdentifierInfo pointer to a normal
@@ -349,23 +353,15 @@ public:
 
   /// getCXXConstructorName - Returns the name of a C++ constructor
   /// for the given Type.
-  DeclarationName getCXXConstructorName(CanQualType Ty) {
-    return getCXXSpecialName(DeclarationName::CXXConstructorName, 
-                             Ty.getUnqualifiedType());
-  }
+  DeclarationName getCXXConstructorName(CanQualType Ty);
 
   /// getCXXDestructorName - Returns the name of a C++ destructor
   /// for the given Type.
-  DeclarationName getCXXDestructorName(CanQualType Ty) {
-    return getCXXSpecialName(DeclarationName::CXXDestructorName, 
-                             Ty.getUnqualifiedType());
-  }
+  DeclarationName getCXXDestructorName(CanQualType Ty);
 
   /// getCXXConversionFunctionName - Returns the name of a C++
   /// conversion function for the given Type.
-  DeclarationName getCXXConversionFunctionName(CanQualType Ty) {
-    return getCXXSpecialName(DeclarationName::CXXConversionFunctionName, Ty);
-  }
+  DeclarationName getCXXConversionFunctionName(CanQualType Ty);
 
   /// getCXXSpecialName - Returns a declaration name for special kind
   /// of C++ name, e.g., for a constructor, destructor, or conversion
@@ -386,32 +382,35 @@ public:
 /// for a declaration name. Needs a DeclarationName in order
 /// to be interpreted correctly.
 struct DeclarationNameLoc {
+  // The source location for identifier stored elsewhere.
+  // struct {} Identifier;
+
+  // Type info for constructors, destructors and conversion functions.
+  // Locations (if any) for the tilde (destructor) or operator keyword
+  // (conversion) are stored elsewhere.
+  struct NT {
+    TypeSourceInfo* TInfo;
+  };
+
+  // The location (if any) of the operator keyword is stored elsewhere.
+  struct CXXOpName {
+    unsigned BeginOpNameLoc;
+    unsigned EndOpNameLoc;
+  };
+
+  // The location (if any) of the operator keyword is stored elsewhere.
+  struct CXXLitOpName {
+    unsigned OpNameLoc;
+  };
+
+  // struct {} CXXUsingDirective;
+  // struct {} ObjCZeroArgSelector;
+  // struct {} ObjCOneArgSelector;
+  // struct {} ObjCMultiArgSelector;
   union {
-    // The source location for identifier stored elsewhere.
-    // struct {} Identifier;
-
-    // Type info for constructors, destructors and conversion functions.
-    // Locations (if any) for the tilde (destructor) or operator keyword
-    // (conversion) are stored elsewhere.
-    struct {
-      TypeSourceInfo* TInfo;
-    } NamedType;
-
-    // The location (if any) of the operator keyword is stored elsewhere.
-    struct {
-      unsigned BeginOpNameLoc;
-      unsigned EndOpNameLoc;
-    } CXXOperatorName;
-
-    // The location (if any) of the operator keyword is stored elsewhere.
-    struct {
-      unsigned OpNameLoc;
-    } CXXLiteralOperatorName;
-
-    // struct {} CXXUsingDirective;
-    // struct {} ObjCZeroArgSelector;
-    // struct {} ObjCOneArgSelector;
-    // struct {} ObjCMultiArgSelector;
+    struct NT NamedType;
+    struct CXXOpName CXXOperatorName;
+    struct CXXLitOpName CXXLiteralOperatorName;
   };
 
   DeclarationNameLoc(DeclarationName Name);
@@ -525,9 +524,7 @@ public:
   SourceLocation getEndLoc() const;
   /// getSourceRange - The range of the declaration name.
   SourceRange getSourceRange() const LLVM_READONLY {
-    SourceLocation BeginLoc = getBeginLoc();
-    SourceLocation EndLoc = getEndLoc();
-    return SourceRange(BeginLoc, EndLoc.isValid() ? EndLoc : BeginLoc);
+    return SourceRange(getLocStart(), getLocEnd());
   }
   SourceLocation getLocStart() const LLVM_READONLY {
     return getBeginLoc();
diff --git a/include/clang/AST/DependentDiagnostic.h b/include/clang/AST/DependentDiagnostic.h
index 948dcb4..004b45d 100644
--- a/include/clang/AST/DependentDiagnostic.h
+++ b/include/clang/AST/DependentDiagnostic.h
@@ -18,11 +18,11 @@
 #ifndef LLVM_CLANG_AST_DEPENDENT_DIAGNOSTIC_H
 #define LLVM_CLANG_AST_DEPENDENT_DIAGNOSTIC_H
 
-#include "clang/Basic/PartialDiagnostic.h"
-#include "clang/Basic/SourceLocation.h"
 #include "clang/AST/DeclBase.h"
 #include "clang/AST/DeclContextInternals.h"
 #include "clang/AST/Type.h"
+#include "clang/Basic/PartialDiagnostic.h"
+#include "clang/Basic/SourceLocation.h"
 
 namespace clang {
 
@@ -108,16 +108,14 @@ private:
 
   PartialDiagnostic Diag;
 
-  union {
-    struct {
-      unsigned Loc;
-      unsigned Access : 2;
-      unsigned IsMember : 1;
-      NamedDecl *TargetDecl;
-      CXXRecordDecl *NamingClass;
-      void *BaseObjectType;
-    } AccessData;
-  };
+  struct {
+    unsigned Loc;
+    unsigned Access : 2;
+    unsigned IsMember : 1;
+    NamedDecl *TargetDecl;
+    CXXRecordDecl *NamingClass;
+    void *BaseObjectType;
+  } AccessData;
 };
 
 /// 
diff --git a/include/clang/AST/EvaluatedExprVisitor.h b/include/clang/AST/EvaluatedExprVisitor.h
index d5e9c8c..eb186c2 100644
--- a/include/clang/AST/EvaluatedExprVisitor.h
+++ b/include/clang/AST/EvaluatedExprVisitor.h
@@ -15,10 +15,10 @@
 #ifndef LLVM_CLANG_AST_EVALUATEDEXPRVISITOR_H
 #define LLVM_CLANG_AST_EVALUATEDEXPRVISITOR_H
 
-#include "clang/AST/StmtVisitor.h"
 #include "clang/AST/DeclCXX.h"
 #include "clang/AST/Expr.h"
 #include "clang/AST/ExprCXX.h"
+#include "clang/AST/StmtVisitor.h"
 
 namespace clang {
   
@@ -49,6 +49,9 @@ public:
   }
   
   void VisitChooseExpr(ChooseExpr *E) {
+    // Don't visit either child expression if the condition is dependent.
+    if (E->getCond()->isValueDependent())
+      return;
     // Only the selected subexpression matters; the other one is not evaluated.
     return this->Visit(E->getChosenSubExpr(Context));
   }
@@ -58,17 +61,17 @@ public:
     // expressions.
     return this->Visit(E->getInit());
   }
-  
+
   void VisitCXXTypeidExpr(CXXTypeidExpr *E) {
-    // typeid(expression) is potentially evaluated when the argument is
-    // a glvalue of polymorphic type. (C++ 5.2.8p2-3)
-    if (!E->isTypeOperand() && E->Classify(Context).isGLValue())
-      if (const RecordType *Record 
-                 = E->getExprOperand()->getType()->template getAs<RecordType>())
-        if (cast<CXXRecordDecl>(Record->getDecl())->isPolymorphic())
-          return this->Visit(E->getExprOperand());
+    if (E->isPotentiallyEvaluated())
+      return this->Visit(E->getExprOperand());
   }
-  
+
+  void VisitCallExpr(CallExpr *CE) {
+    if (!CE->isUnevaluatedBuiltinCall(Context))
+      return static_cast<ImplClass*>(this)->VisitExpr(CE);
+  }
+
   /// \brief The basis case walks all of the children of the statement or
   /// expression, assuming they are all potentially evaluated.
   void VisitStmt(Stmt *S) {
diff --git a/include/clang/AST/Expr.h b/include/clang/AST/Expr.h
index dc83654..36d70d8 100644
--- a/include/clang/AST/Expr.h
+++ b/include/clang/AST/Expr.h
@@ -15,38 +15,38 @@
 #define LLVM_CLANG_AST_EXPR_H
 
 #include "clang/AST/APValue.h"
+#include "clang/AST/ASTVector.h"
 #include "clang/AST/Decl.h"
-#include "clang/AST/Stmt.h"
-#include "clang/AST/Type.h"
 #include "clang/AST/DeclAccessPair.h"
 #include "clang/AST/OperationKinds.h"
-#include "clang/AST/ASTVector.h"
+#include "clang/AST/Stmt.h"
 #include "clang/AST/TemplateBase.h"
-#include "clang/Basic/TargetInfo.h"
+#include "clang/AST/Type.h"
+#include "clang/Basic/CharInfo.h"
 #include "clang/Basic/TypeTraits.h"
-#include "llvm/ADT/APSInt.h"
 #include "llvm/ADT/APFloat.h"
+#include "llvm/ADT/APSInt.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/Compiler.h"
-#include <cctype>
 
 namespace clang {
-  class ASTContext;
   class APValue;
-  class CastExpr;
-  class Decl;
-  class IdentifierInfo;
-  class ParmVarDecl;
-  class NamedDecl;
-  class ValueDecl;
+  class ASTContext;
   class BlockDecl;
   class CXXBaseSpecifier;
+  class CXXMemberCallExpr;
   class CXXOperatorCallExpr;
+  class CastExpr;
+  class Decl;
+  class IdentifierInfo;
   class MaterializeTemporaryExpr;
-  class CXXMemberCallExpr;
+  class NamedDecl;
   class ObjCPropertyRefExpr;
   class OpaqueValueExpr;
+  class ParmVarDecl;
+  class TargetInfo;
+  class ValueDecl;
 
 /// \brief A simple array of base specifiers.
 typedef SmallVector<CXXBaseSpecifier*, 4> CXXCastPath;
@@ -60,18 +60,21 @@ struct SubobjectAdjustment {
     MemberPointerAdjustment
   } Kind;
 
-   union {
-    struct {
-      const CastExpr *BasePath;
-      const CXXRecordDecl *DerivedClass;
-    } DerivedToBase;
 
-    FieldDecl *Field;
+  struct DTB {
+    const CastExpr *BasePath;
+    const CXXRecordDecl *DerivedClass;
+  };
 
-    struct {
-      const MemberPointerType *MPT;
-      Expr *RHS;
-    } Ptr;
+  struct P {
+    const MemberPointerType *MPT;
+    Expr *RHS;
+  };
+
+  union {
+    struct DTB DerivedToBase;
+    FieldDecl *Field;
+    struct P Ptr;
   };
 
   SubobjectAdjustment(const CastExpr *BasePath,
@@ -196,7 +199,7 @@ public:
   }
 
   /// \brief Whether this expression contains an unexpanded parameter
-  /// pack (for C++0x variadic templates).
+  /// pack (for C++11 variadic templates).
   ///
   /// Given the following function template:
   ///
@@ -238,7 +241,7 @@ public:
   /// result of an r-value expression is a value detached from any
   /// specific storage.
   ///
-  /// C++0x divides the concept of "r-value" into pure r-values
+  /// C++11 divides the concept of "r-value" into pure r-values
   /// ("pr-values") and so-called expiring values ("x-values"), which
   /// identify specific objects that can be safely cannibalized for
   /// their resources.  This is an unfortunate abuse of terminology on
@@ -294,7 +297,7 @@ public:
   isModifiableLvalueResult isModifiableLvalue(ASTContext &Ctx,
                                               SourceLocation *Loc = 0) const;
 
-  /// \brief The return type of classify(). Represents the C++0x expression
+  /// \brief The return type of classify(). Represents the C++11 expression
   ///        taxonomy.
   class Classification {
   public:
@@ -357,10 +360,10 @@ public:
     }
 
   };
-  /// \brief Classify - Classify this expression according to the C++0x
+  /// \brief Classify - Classify this expression according to the C++11
   ///        expression taxonomy.
   ///
-  /// C++0x defines ([basic.lval]) a new taxonomy of expressions to replace the
+  /// C++11 defines ([basic.lval]) a new taxonomy of expressions to replace the
   /// old lvalue vs rvalue. This function determines the type of expression this
   /// is. There are three expression types:
   /// - lvalues are classical lvalues as in C++03.
@@ -374,7 +377,7 @@ public:
   }
 
   /// \brief ClassifyModifiable - Classify this expression according to the
-  ///        C++0x expression taxonomy, and see if it is valid on the left side
+  ///        C++11 expression taxonomy, and see if it is valid on the left side
   ///        of an assignment.
   ///
   /// This function extends classify in that it also tests whether the
@@ -490,7 +493,7 @@ public:
   /// constexpr. Return false if the function can never produce a constant
   /// expression, along with diagnostics describing why not.
   static bool isPotentialConstantExpr(const FunctionDecl *FD,
-                                      llvm::SmallVectorImpl<
+                                      SmallVectorImpl<
                                         PartialDiagnosticAt> &Diags);
 
   /// isConstantInitializer - Returns true if this expression can be emitted to
@@ -510,7 +513,7 @@ public:
     /// foldable. If the expression is foldable, but not a constant expression,
     /// the notes will describes why it isn't a constant expression. If the
     /// expression *is* a constant expression, no notes will be produced.
-    llvm::SmallVectorImpl<PartialDiagnosticAt> *Diag;
+    SmallVectorImpl<PartialDiagnosticAt> *Diag;
 
     EvalStatus() : HasSideEffects(false), Diag(0) {}
 
@@ -568,7 +571,11 @@ public:
   /// EvaluateKnownConstInt - Call EvaluateAsRValue and return the folded
   /// integer. This must be called on an expression that constant folds to an
   /// integer.
-  llvm::APSInt EvaluateKnownConstInt(const ASTContext &Ctx) const;
+  llvm::APSInt EvaluateKnownConstInt(const ASTContext &Ctx,
+                          SmallVectorImpl<PartialDiagnosticAt> *Diag=0) const;
+  
+  void EvaluateForOverflow(const ASTContext &Ctx,
+                           SmallVectorImpl<PartialDiagnosticAt> *Diag) const;
 
   /// EvaluateAsLValue - Evaluate an expression to see if we can fold it to an
   /// lvalue with link time known address, with no side-effects.
@@ -580,7 +587,7 @@ public:
   /// notes will be produced if the expression is not a constant expression.
   bool EvaluateAsInitializer(APValue &Result, const ASTContext &Ctx,
                              const VarDecl *VD,
-                       llvm::SmallVectorImpl<PartialDiagnosticAt> &Notes) const;
+                             SmallVectorImpl<PartialDiagnosticAt> &Notes) const;
 
   /// \brief Enumeration used to describe the kind of Null pointer constant
   /// returned from \c isNullPointerConstant().
@@ -598,8 +605,8 @@ public:
     /// \brief Expression is a Null pointer constant built from a literal zero.
     NPCK_ZeroLiteral,
 
-    /// \brief Expression is a C++0X nullptr.
-    NPCK_CXX0X_nullptr,
+    /// \brief Expression is a C++11 nullptr.
+    NPCK_CXX11_nullptr,
 
     /// \brief Expression is a GNU-style __null constant.
     NPCK_GNUNull
@@ -728,7 +735,7 @@ public:
     return const_cast<Expr*>(this)->IgnoreParenNoopCasts(Ctx);
   }
 
-  static bool hasAnyTypeDependentArguments(llvm::ArrayRef<Expr *> Exprs);
+  static bool hasAnyTypeDependentArguments(ArrayRef<Expr *> Exprs);
 
   /// \brief For an expression of class type or pointer to class type,
   /// return the most derived class decl the expression is known to refer to.
@@ -796,9 +803,11 @@ public:
   /// \brief Retrieve the location of this expression.
   SourceLocation getLocation() const { return Loc; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    if (SourceExpr) return SourceExpr->getSourceRange();
-    return Loc;
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return SourceExpr ? SourceExpr->getLocStart() : Loc;
+  }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return SourceExpr ? SourceExpr->getLocEnd() : Loc;
   }
   SourceLocation getExprLoc() const LLVM_READONLY {
     if (SourceExpr) return SourceExpr->getExprLoc();
@@ -954,7 +963,6 @@ public:
 
   SourceLocation getLocation() const { return Loc; }
   void setLocation(SourceLocation L) { Loc = L; }
-  SourceRange getSourceRange() const LLVM_READONLY;
   SourceLocation getLocStart() const LLVM_READONLY;
   SourceLocation getLocEnd() const LLVM_READONLY;
 
@@ -1160,7 +1168,8 @@ public:
 
   static std::string ComputeName(IdentType IT, const Decl *CurrentDecl);
 
-  SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(Loc); }
+  SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Loc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == PredefinedExprClass;
@@ -1211,8 +1220,8 @@ public:
 
 class APFloatStorage : private APNumericStorage {
 public:
-  llvm::APFloat getValue(bool IsIEEE) const {
-    return llvm::APFloat(getIntValue(), IsIEEE);
+  llvm::APFloat getValue(const llvm::fltSemantics &Semantics) const {
+    return llvm::APFloat(Semantics, getIntValue());
   }
   void setValue(ASTContext &C, const llvm::APFloat &Val) {
     setIntValue(C, Val.bitcastToAPInt());
@@ -1241,7 +1250,8 @@ public:
   /// \brief Returns a new empty integer literal.
   static IntegerLiteral *Create(ASTContext &C, EmptyShell Empty);
 
-  SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(Loc); }
+  SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Loc; }
 
   /// \brief Retrieve the location of the literal.
   SourceLocation getLocation() const { return Loc; }
@@ -1286,7 +1296,8 @@ public:
     return static_cast<CharacterKind>(CharacterLiteralBits.Kind);
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(Loc); }
+  SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Loc; }
 
   unsigned getValue() const { return Value; }
 
@@ -1317,12 +1328,31 @@ public:
   static FloatingLiteral *Create(ASTContext &C, EmptyShell Empty);
 
   llvm::APFloat getValue() const {
-    return APFloatStorage::getValue(FloatingLiteralBits.IsIEEE);
+    return APFloatStorage::getValue(getSemantics());
   }
   void setValue(ASTContext &C, const llvm::APFloat &Val) {
+    assert(&getSemantics() == &Val.getSemantics() && "Inconsistent semantics");
     APFloatStorage::setValue(C, Val);
   }
 
+  /// Get a raw enumeration value representing the floating-point semantics of
+  /// this literal (32-bit IEEE, x87, ...), suitable for serialisation.
+  APFloatSemantics getRawSemantics() const {
+    return static_cast<APFloatSemantics>(FloatingLiteralBits.Semantics);
+  }
+
+  /// Set the raw enumeration value representing the floating-point semantics of
+  /// this literal (32-bit IEEE, x87, ...), suitable for serialisation.
+  void setRawSemantics(APFloatSemantics Sem) {
+    FloatingLiteralBits.Semantics = Sem;
+  }
+
+  /// Return the APFloat semantics this literal uses.
+  const llvm::fltSemantics &getSemantics() const;
+
+  /// Set the APFloat semantics this literal uses.
+  void setSemantics(const llvm::fltSemantics &Sem);
+
   bool isExact() const { return FloatingLiteralBits.IsExact; }
   void setExact(bool E) { FloatingLiteralBits.IsExact = E; }
 
@@ -1334,7 +1364,8 @@ public:
   SourceLocation getLocation() const { return Loc; }
   void setLocation(SourceLocation L) { Loc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(Loc); }
+  SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Loc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == FloatingLiteralClass;
@@ -1365,7 +1396,9 @@ public:
   Expr *getSubExpr() { return cast<Expr>(Val); }
   void setSubExpr(Expr *E) { Val = E; }
 
-  SourceRange getSourceRange() const LLVM_READONLY { return Val->getSourceRange(); }
+  SourceLocation getLocStart() const LLVM_READONLY { return Val->getLocStart(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Val->getLocEnd(); }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ImaginaryLiteralClass;
   }
@@ -1458,7 +1491,7 @@ public:
                      getByteLength());
   }
 
-  void outputString(raw_ostream &OS);
+  void outputString(raw_ostream &OS) const;
 
   uint32_t getCodeUnit(size_t i) const {
     assert(i < Length && "out of bounds access");
@@ -1491,7 +1524,7 @@ public:
   bool containsNonAsciiOrNull() const {
     StringRef Str = getString();
     for (unsigned i = 0, e = Str.size(); i != e; ++i)
-      if (!isascii(Str[i]) || !Str[i])
+      if (!isASCII(Str[i]) || !Str[i])
         return true;
     return false;
   }
@@ -1524,9 +1557,11 @@ public:
   tokloc_iterator tokloc_begin() const { return TokLocs; }
   tokloc_iterator tokloc_end() const { return TokLocs+NumConcatenated; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(TokLocs[0], TokLocs[NumConcatenated-1]);
+  SourceLocation getLocStart() const LLVM_READONLY { return TokLocs[0]; }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return TokLocs[NumConcatenated - 1];
   }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == StringLiteralClass;
   }
@@ -1557,7 +1592,8 @@ public:
   Expr *getSubExpr() { return cast<Expr>(Val); }
   void setSubExpr(Expr *E) { Val = E; }
 
-  SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(L, R); }
+  SourceLocation getLocStart() const LLVM_READONLY { return L; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return R; }
 
   /// \brief Get the location of the left parentheses '('.
   SourceLocation getLParen() const { return L; }
@@ -1669,11 +1705,11 @@ public:
   /// the given unary opcode.
   static OverloadedOperatorKind getOverloadedOperator(Opcode Opc);
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    if (isPostfix())
-      return SourceRange(Val->getLocStart(), Loc);
-    else
-      return SourceRange(Loc, Val->getLocEnd());
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return isPostfix() ? Val->getLocStart() : Loc;
+  }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return isPostfix() ? Loc : Val->getLocEnd();
   }
   SourceLocation getExprLoc() const LLVM_READONLY { return Loc; }
 
@@ -1791,6 +1827,8 @@ public:
     /// contains the location of the period (if there is one) and the
     /// identifier.
     SourceRange getSourceRange() const LLVM_READONLY { return Range; }
+    SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); }
+    SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); }
   };
 
 private:
@@ -1870,9 +1908,8 @@ public:
     return NumExprs;
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(OperatorLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return OperatorLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == OffsetOfExprClass;
@@ -1974,9 +2011,8 @@ public:
   SourceLocation getRParenLoc() const { return RParenLoc; }
   void setRParenLoc(SourceLocation L) { RParenLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(OpLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return OpLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == UnaryExprOrTypeTraitExprClass;
@@ -2048,14 +2084,17 @@ public:
     return cast<Expr>(getRHS()->getType()->isIntegerType() ? getRHS():getLHS());
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(getLHS()->getLocStart(), RBracketLoc);
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return getLHS()->getLocStart();
   }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RBracketLoc; }
 
   SourceLocation getRBracketLoc() const { return RBracketLoc; }
   void setRBracketLoc(SourceLocation L) { RBracketLoc = L; }
 
-  SourceLocation getExprLoc() const LLVM_READONLY { return getBase()->getExprLoc(); }
+  SourceLocation getExprLoc() const LLVM_READONLY {
+    return getBase()->getExprLoc();
+  }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ArraySubscriptExprClass;
@@ -2171,6 +2210,15 @@ public:
     return SubExprs+PREARGS_START+getNumPreArgs()+getNumArgs();
   }
 
+  /// This method provides fast access to all the subexpressions of
+  /// a CallExpr without going through the slower virtual child_iterator
+  /// interface.  This provides efficient reverse iteration of the
+  /// subexpressions.  This is currently used for CFG construction.
+  ArrayRef<Stmt*> getRawSubExprs() {
+    return ArrayRef<Stmt*>(SubExprs,
+                           getNumPreArgs() + PREARGS_START + getNumArgs());
+  }
+
   /// getNumCommas - Return the number of commas that must have been present in
   /// this function call.
   unsigned getNumCommas() const { return NumArgs ? NumArgs - 1 : 0; }
@@ -2179,6 +2227,10 @@ public:
   /// not, return 0.
   unsigned isBuiltinCall() const;
 
+  /// \brief Returns \c true if this is a call to a builtin which does not
+  /// evaluate side-effects within its arguments.
+  bool isUnevaluatedBuiltinCall(ASTContext &Ctx) const;
+
   /// getCallReturnType - Get the return type of the call expr. This is not
   /// always the type of the expr itself, if the return type is a reference
   /// type.
@@ -2187,7 +2239,6 @@ public:
   SourceLocation getRParenLoc() const { return RParenLoc; }
   void setRParenLoc(SourceLocation L) { RParenLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY;
   SourceLocation getLocStart() const LLVM_READONLY;
   SourceLocation getLocEnd() const LLVM_READONLY;
 
@@ -2455,7 +2506,6 @@ public:
   SourceLocation getMemberLoc() const { return MemberLoc; }
   void setMemberLoc(SourceLocation L) { MemberLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY;
   SourceLocation getLocStart() const LLVM_READONLY;
   SourceLocation getLocEnd() const LLVM_READONLY;
 
@@ -2534,13 +2584,19 @@ public:
     TInfoAndScope.setPointer(tinfo);
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
+  SourceLocation getLocStart() const LLVM_READONLY {
     // FIXME: Init should never be null.
     if (!Init)
-      return SourceRange();
+      return SourceLocation();
     if (LParenLoc.isInvalid())
-      return Init->getSourceRange();
-    return SourceRange(LParenLoc, Init->getLocEnd());
+      return Init->getLocStart();
+    return LParenLoc;
+  }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    // FIXME: Init should never be null.
+    if (!Init)
+      return SourceLocation();
+    return Init->getLocEnd();
   }
 
   static bool classof(const Stmt *T) {
@@ -2686,9 +2742,6 @@ public:
 
   static ImplicitCastExpr *CreateEmpty(ASTContext &Context, unsigned PathSize);
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return getSubExpr()->getSourceRange();
-  }
   SourceLocation getLocStart() const LLVM_READONLY {
     return getSubExpr()->getLocStart();
   }
@@ -2787,9 +2840,11 @@ public:
   SourceLocation getRParenLoc() const { return RPLoc; }
   void setRParenLoc(SourceLocation L) { RPLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(LPLoc, getSubExpr()->getSourceRange().getEnd());
+  SourceLocation getLocStart() const LLVM_READONLY { return LPLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return getSubExpr()->getLocEnd();
   }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == CStyleCastExprClass;
   }
@@ -2845,7 +2900,7 @@ public:
     SubExprs[LHS] = lhs;
     SubExprs[RHS] = rhs;
     assert(!isCompoundAssignmentOp() &&
-           "Use ArithAssignBinaryOperator for compound assignments");
+           "Use CompoundAssignOperator for compound assignments");
   }
 
   /// \brief Construct an empty binary operator.
@@ -2864,8 +2919,11 @@ public:
   Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); }
   void setRHS(Expr *E) { SubExprs[RHS] = E; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(getLHS()->getLocStart(), getRHS()->getLocEnd());
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return getLHS()->getLocStart();
+  }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return getRHS()->getLocEnd();
   }
 
   /// getOpcodeStr - Turn an Opcode enum value into the punctuation char it
@@ -2902,6 +2960,33 @@ public:
   static bool isComparisonOp(Opcode Opc) { return Opc >= BO_LT && Opc<=BO_NE; }
   bool isComparisonOp() const { return isComparisonOp(getOpcode()); }
 
+  static Opcode negateComparisonOp(Opcode Opc) {
+    switch (Opc) {
+    default:
+      llvm_unreachable("Not a comparsion operator.");
+    case BO_LT: return BO_GE;
+    case BO_GT: return BO_LE;
+    case BO_LE: return BO_GT;
+    case BO_GE: return BO_LT;
+    case BO_EQ: return BO_NE;
+    case BO_NE: return BO_EQ;
+    }
+  }
+
+  static Opcode reverseComparisonOp(Opcode Opc) {
+    switch (Opc) {
+    default:
+      llvm_unreachable("Not a comparsion operator.");
+    case BO_LT: return BO_GT;
+    case BO_GT: return BO_LT;
+    case BO_LE: return BO_GE;
+    case BO_GE: return BO_LE;
+    case BO_EQ:
+    case BO_NE:
+      return Opc;
+    }
+  }
+
   static bool isLogicalOp(Opcode Opc) { return Opc == BO_LAnd || Opc==BO_LOr; }
   bool isLogicalOp() const { return isLogicalOp(getOpcode()); }
 
@@ -3101,9 +3186,13 @@ public:
   Expr *getLHS() const { return cast<Expr>(SubExprs[LHS]); }
   Expr *getRHS() const { return cast<Expr>(SubExprs[RHS]); }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(getCond()->getLocStart(), getRHS()->getLocEnd());
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return getCond()->getLocStart();
+  }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return getRHS()->getLocEnd();
   }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ConditionalOperatorClass;
   }
@@ -3182,9 +3271,13 @@ public:
     return cast<Expr>(SubExprs[RHS]);
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(getCommon()->getLocStart(), getFalseExpr()->getLocEnd());
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return getCommon()->getLocStart();
   }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return getFalseExpr()->getLocEnd();
+  }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == BinaryConditionalOperatorClass;
   }
@@ -3233,9 +3326,8 @@ public:
   SourceLocation getLabelLoc() const { return LabelLoc; }
   void setLabelLoc(SourceLocation L) { LabelLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(AmpAmpLoc, LabelLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return AmpAmpLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return LabelLoc; }
 
   LabelDecl *getLabel() const { return Label; }
   void setLabel(LabelDecl *L) { Label = L; }
@@ -3274,9 +3366,8 @@ public:
   const CompoundStmt *getSubStmt() const { return cast<CompoundStmt>(SubStmt); }
   void setSubStmt(CompoundStmt *S) { SubStmt = S; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(LParenLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return LParenLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
 
   SourceLocation getLParenLoc() const { return LParenLoc; }
   void setLParenLoc(SourceLocation L) { LParenLoc = L; }
@@ -3322,9 +3413,9 @@ public:
   SourceLocation getRParenLoc() const { return RParenLoc; }
   void setRParenLoc(SourceLocation L) { RParenLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(BuiltinLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return BuiltinLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ShuffleVectorExprClass;
   }
@@ -3416,9 +3507,9 @@ public:
   SourceLocation getRParenLoc() const { return RParenLoc; }
   void setRParenLoc(SourceLocation L) { RParenLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(BuiltinLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return BuiltinLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ChooseExprClass;
   }
@@ -3452,9 +3543,9 @@ public:
   SourceLocation getTokenLocation() const { return TokenLoc; }
   void setTokenLocation(SourceLocation L) { TokenLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(TokenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return TokenLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return TokenLoc; }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == GNUNullExprClass;
   }
@@ -3497,9 +3588,9 @@ public:
   SourceLocation getRParenLoc() const { return RParenLoc; }
   void setRParenLoc(SourceLocation L) { RParenLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(BuiltinLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return BuiltinLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == VAArgExprClass;
   }
@@ -3580,8 +3671,8 @@ public:
                ArrayRef<Expr*> initExprs, SourceLocation rbraceloc);
 
   /// \brief Build an empty initializer list.
-  explicit InitListExpr(ASTContext &C, EmptyShell Empty)
-    : Expr(InitListExprClass, Empty), InitExprs(C) { }
+  explicit InitListExpr(EmptyShell Empty)
+    : Expr(InitListExprClass, Empty) { }
 
   unsigned getNumInits() const { return InitExprs.size(); }
 
@@ -3698,7 +3789,8 @@ public:
     InitListExprBits.InitializesStdInitializerList = ISIL;
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY;
+  SourceLocation getLocStart() const LLVM_READONLY;
+  SourceLocation getLocEnd() const LLVM_READONLY;
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == InitListExprClass;
@@ -3923,17 +4015,17 @@ public:
       return ArrayOrRange.Index;
     }
 
-    SourceLocation getStartLocation() const {
+    SourceLocation getLocStart() const LLVM_READONLY {
       if (Kind == FieldDesignator)
         return getDotLoc().isInvalid()? getFieldLoc() : getDotLoc();
       else
         return getLBracketLoc();
     }
-    SourceLocation getEndLocation() const {
+    SourceLocation getLocEnd() const LLVM_READONLY {
       return Kind == FieldDesignator ? getFieldLoc() : getRBracketLoc();
     }
     SourceRange getSourceRange() const LLVM_READONLY {
-      return SourceRange(getStartLocation(), getEndLocation());
+      return SourceRange(getLocStart(), getLocEnd());
     }
   };
 
@@ -3984,9 +4076,9 @@ public:
   void setDesignators(ASTContext &C, const Designator *Desigs,
                       unsigned NumDesigs);
 
-  Expr *getArrayIndex(const Designator& D);
-  Expr *getArrayRangeStart(const Designator& D);
-  Expr *getArrayRangeEnd(const Designator& D);
+  Expr *getArrayIndex(const Designator &D) const;
+  Expr *getArrayRangeStart(const Designator &D) const;
+  Expr *getArrayRangeEnd(const Designator &D) const;
 
   /// @brief Retrieve the location of the '=' that precedes the
   /// initializer value itself, if present.
@@ -4034,7 +4126,8 @@ public:
 
   SourceRange getDesignatorsSourceRange() const;
 
-  SourceRange getSourceRange() const LLVM_READONLY;
+  SourceLocation getLocStart() const LLVM_READONLY;
+  SourceLocation getLocEnd() const LLVM_READONLY;
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == DesignatedInitExprClass;
@@ -4069,9 +4162,8 @@ public:
     return T->getStmtClass() == ImplicitValueInitExprClass;
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange();
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return SourceLocation(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return SourceLocation(); }
 
   // Iterators
   child_range children() { return child_range(); }
@@ -4107,9 +4199,9 @@ public:
   SourceLocation getLParenLoc() const { return LParenLoc; }
   SourceLocation getRParenLoc() const { return RParenLoc; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(LParenLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return LParenLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ParenListExprClass;
   }
@@ -4221,9 +4313,9 @@ public:
   const Expr *getResultExpr() const { return getAssocExpr(getResultIndex()); }
   Expr *getResultExpr() { return getAssocExpr(getResultIndex()); }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(GenericLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return GenericLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == GenericSelectionExprClass;
   }
@@ -4286,9 +4378,10 @@ public:
   /// aggregate Constant of ConstantInt(s).
   void getEncodedElementAccess(SmallVectorImpl<unsigned> &Elts) const;
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(getBase()->getLocStart(), AccessorLoc);
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return getBase()->getLocStart();
   }
+  SourceLocation getLocEnd() const LLVM_READONLY { return AccessorLoc; }
 
   /// isArrow - Return true if the base expression is a pointer to vector,
   /// return false if the base expression is a vector.
@@ -4328,9 +4421,8 @@ public:
   const Stmt *getBody() const;
   Stmt *getBody();
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(getCaretLocation(), getBody()->getLocEnd());
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return getCaretLocation(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return getBody()->getLocEnd(); }
 
   /// getFunctionType - Return the underlying function type for this block.
   const FunctionProtoType *getFunctionType() const;
@@ -4377,9 +4469,8 @@ public:
   /// getRParenLoc - Return the location of final right parenthesis.
   SourceLocation getRParenLoc() const { return RParenLoc; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(BuiltinLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return BuiltinLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == AsTypeExprClass;
@@ -4508,8 +4599,12 @@ public:
   SourceLocation getExprLoc() const LLVM_READONLY {
     return getSyntacticForm()->getExprLoc();
   }
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return getSyntacticForm()->getSourceRange();
+
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return getSyntacticForm()->getLocStart();
+  }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return getSyntacticForm()->getLocEnd();
   }
 
   child_range children() {
@@ -4603,9 +4698,9 @@ public:
   SourceLocation getBuiltinLoc() const { return BuiltinLoc; }
   SourceLocation getRParenLoc() const { return RParenLoc; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(BuiltinLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return BuiltinLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == AtomicExprClass;
   }
diff --git a/include/clang/AST/ExprCXX.h b/include/clang/AST/ExprCXX.h
index 9c759db..04f6fb6 100644
--- a/include/clang/AST/ExprCXX.h
+++ b/include/clang/AST/ExprCXX.h
@@ -16,8 +16,8 @@
 
 #include "clang/AST/Decl.h"
 #include "clang/AST/Expr.h"
-#include "clang/AST/UnresolvedSet.h"
 #include "clang/AST/TemplateBase.h"
+#include "clang/AST/UnresolvedSet.h"
 #include "clang/Basic/ExpressionTraits.h"
 #include "clang/Basic/Lambda.h"
 #include "clang/Basic/TypeTraits.h"
@@ -30,6 +30,7 @@ class CXXDestructorDecl;
 class CXXMethodDecl;
 class CXXTemporary;
 class TemplateArgumentListInfo;
+class UuidAttr;
 
 //===--------------------------------------------------------------------===//
 // C++ Expressions.
@@ -83,6 +84,8 @@ public:
   /// bracket.
   SourceLocation getOperatorLoc() const { return getRParenLoc(); }
 
+  SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); }
   SourceRange getSourceRange() const { return Range; }
 
   static bool classof(const Stmt *T) {
@@ -176,14 +179,16 @@ class CXXNamedCastExpr : public ExplicitCastExpr {
 private:
   SourceLocation Loc; // the location of the casting op
   SourceLocation RParenLoc; // the location of the right parenthesis
+  SourceRange AngleBrackets; // range for '<' '>'
 
 protected:
   CXXNamedCastExpr(StmtClass SC, QualType ty, ExprValueKind VK,
                    CastKind kind, Expr *op, unsigned PathSize,
                    TypeSourceInfo *writtenTy, SourceLocation l,
-                   SourceLocation RParenLoc)
+                   SourceLocation RParenLoc,
+                   SourceRange AngleBrackets)
     : ExplicitCastExpr(SC, ty, VK, kind, op, PathSize, writtenTy), Loc(l),
-      RParenLoc(RParenLoc) {}
+      RParenLoc(RParenLoc), AngleBrackets(AngleBrackets) {}
 
   explicit CXXNamedCastExpr(StmtClass SC, EmptyShell Shell, unsigned PathSize)
     : ExplicitCastExpr(SC, Shell, PathSize) { }
@@ -200,9 +205,10 @@ public:
   /// \brief Retrieve the location of the closing parenthesis.
   SourceLocation getRParenLoc() const { return RParenLoc; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(Loc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
+  SourceRange getAngleBrackets() const LLVM_READONLY { return AngleBrackets; }
+
   static bool classof(const Stmt *T) {
     switch (T->getStmtClass()) {
     case CXXStaticCastExprClass:
@@ -224,9 +230,10 @@ public:
 class CXXStaticCastExpr : public CXXNamedCastExpr {
   CXXStaticCastExpr(QualType ty, ExprValueKind vk, CastKind kind, Expr *op,
                     unsigned pathSize, TypeSourceInfo *writtenTy,
-                    SourceLocation l, SourceLocation RParenLoc)
+                    SourceLocation l, SourceLocation RParenLoc,
+                    SourceRange AngleBrackets)
     : CXXNamedCastExpr(CXXStaticCastExprClass, ty, vk, kind, op, pathSize,
-                       writtenTy, l, RParenLoc) {}
+                       writtenTy, l, RParenLoc, AngleBrackets) {}
 
   explicit CXXStaticCastExpr(EmptyShell Empty, unsigned PathSize)
     : CXXNamedCastExpr(CXXStaticCastExprClass, Empty, PathSize) { }
@@ -236,7 +243,8 @@ public:
                                    ExprValueKind VK, CastKind K, Expr *Op,
                                    const CXXCastPath *Path,
                                    TypeSourceInfo *Written, SourceLocation L,
-                                   SourceLocation RParenLoc);
+                                   SourceLocation RParenLoc,
+                                   SourceRange AngleBrackets);
   static CXXStaticCastExpr *CreateEmpty(ASTContext &Context,
                                         unsigned PathSize);
 
@@ -254,9 +262,10 @@ public:
 class CXXDynamicCastExpr : public CXXNamedCastExpr {
   CXXDynamicCastExpr(QualType ty, ExprValueKind VK, CastKind kind,
                      Expr *op, unsigned pathSize, TypeSourceInfo *writtenTy,
-                     SourceLocation l, SourceLocation RParenLoc)
+                     SourceLocation l, SourceLocation RParenLoc,
+                     SourceRange AngleBrackets)
     : CXXNamedCastExpr(CXXDynamicCastExprClass, ty, VK, kind, op, pathSize,
-                       writtenTy, l, RParenLoc) {}
+                       writtenTy, l, RParenLoc, AngleBrackets) {}
 
   explicit CXXDynamicCastExpr(EmptyShell Empty, unsigned pathSize)
     : CXXNamedCastExpr(CXXDynamicCastExprClass, Empty, pathSize) { }
@@ -266,7 +275,8 @@ public:
                                     ExprValueKind VK, CastKind Kind, Expr *Op,
                                     const CXXCastPath *Path,
                                     TypeSourceInfo *Written, SourceLocation L,
-                                    SourceLocation RParenLoc);
+                                    SourceLocation RParenLoc,
+                                    SourceRange AngleBrackets);
 
   static CXXDynamicCastExpr *CreateEmpty(ASTContext &Context,
                                          unsigned pathSize);
@@ -288,9 +298,10 @@ class CXXReinterpretCastExpr : public CXXNamedCastExpr {
   CXXReinterpretCastExpr(QualType ty, ExprValueKind vk, CastKind kind,
                          Expr *op, unsigned pathSize,
                          TypeSourceInfo *writtenTy, SourceLocation l,
-                         SourceLocation RParenLoc)
+                         SourceLocation RParenLoc,
+                         SourceRange AngleBrackets)
     : CXXNamedCastExpr(CXXReinterpretCastExprClass, ty, vk, kind, op,
-                       pathSize, writtenTy, l, RParenLoc) {}
+                       pathSize, writtenTy, l, RParenLoc, AngleBrackets) {}
 
   CXXReinterpretCastExpr(EmptyShell Empty, unsigned pathSize)
     : CXXNamedCastExpr(CXXReinterpretCastExprClass, Empty, pathSize) { }
@@ -300,7 +311,8 @@ public:
                                         ExprValueKind VK, CastKind Kind,
                                         Expr *Op, const CXXCastPath *Path,
                                  TypeSourceInfo *WrittenTy, SourceLocation L,
-                                        SourceLocation RParenLoc);
+                                        SourceLocation RParenLoc,
+                                        SourceRange AngleBrackets);
   static CXXReinterpretCastExpr *CreateEmpty(ASTContext &Context,
                                              unsigned pathSize);
 
@@ -317,9 +329,9 @@ public:
 class CXXConstCastExpr : public CXXNamedCastExpr {
   CXXConstCastExpr(QualType ty, ExprValueKind VK, Expr *op,
                    TypeSourceInfo *writtenTy, SourceLocation l,
-                   SourceLocation RParenLoc)
+                   SourceLocation RParenLoc, SourceRange AngleBrackets)
     : CXXNamedCastExpr(CXXConstCastExprClass, ty, VK, CK_NoOp, op,
-                       0, writtenTy, l, RParenLoc) {}
+                       0, writtenTy, l, RParenLoc, AngleBrackets) {}
 
   explicit CXXConstCastExpr(EmptyShell Empty)
     : CXXNamedCastExpr(CXXConstCastExprClass, Empty, 0) { }
@@ -328,7 +340,8 @@ public:
   static CXXConstCastExpr *Create(ASTContext &Context, QualType T,
                                   ExprValueKind VK, Expr *Op,
                                   TypeSourceInfo *WrittenTy, SourceLocation L,
-                                  SourceLocation RParenLoc);
+                                  SourceLocation RParenLoc,
+                                  SourceRange AngleBrackets);
   static CXXConstCastExpr *CreateEmpty(ASTContext &Context);
 
   static bool classof(const Stmt *T) {
@@ -386,9 +399,6 @@ public:
     return getArg(0)->getLocStart();
   }
   SourceLocation getLocEnd() const { return getRParenLoc(); }
-  SourceRange getSourceRange() const {
-    return SourceRange(getLocStart(), getLocEnd());
-  }
 
 
   /// getUDSuffixLoc - Returns the location of a ud-suffix in the expression.
@@ -424,7 +434,8 @@ public:
   bool getValue() const { return Value; }
   void setValue(bool V) { Value = V; }
 
-  SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(Loc); }
+  SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Loc; }
 
   SourceLocation getLocation() const { return Loc; }
   void setLocation(SourceLocation L) { Loc = L; }
@@ -449,7 +460,8 @@ public:
   explicit CXXNullPtrLiteralExpr(EmptyShell Empty)
     : Expr(CXXNullPtrLiteralExprClass, Empty) { }
 
-  SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(Loc); }
+  SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Loc; }
 
   SourceLocation getLocation() const { return Loc; }
   void setLocation(SourceLocation L) { Loc = L; }
@@ -531,6 +543,8 @@ public:
     Operand = E;
   }
 
+  SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); }
   SourceRange getSourceRange() const LLVM_READONLY { return Range; }
   void setSourceRange(SourceRange R) { Range = R; }
 
@@ -605,6 +619,8 @@ public:
     Operand = E;
   }
 
+  SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); }
   SourceRange getSourceRange() const LLVM_READONLY { return Range; }
   void setSourceRange(SourceRange R) { Range = R; }
 
@@ -653,7 +669,8 @@ public:
   SourceLocation getLocation() const { return Loc; }
   void setLocation(SourceLocation L) { Loc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(Loc); }
+  SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Loc; }
 
   bool isImplicit() const { return Implicit; }
   void setImplicit(bool I) { Implicit = I; }
@@ -702,10 +719,11 @@ public:
   /// this variable.
   bool isThrownVariableInScope() const { return IsThrownVariableInScope; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
+  SourceLocation getLocStart() const LLVM_READONLY { return ThrowLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY {
     if (getSubExpr() == 0)
-      return SourceRange(ThrowLoc, ThrowLoc);
-    return SourceRange(ThrowLoc, getSubExpr()->getSourceRange().getEnd());
+      return ThrowLoc;
+    return getSubExpr()->getLocEnd();
   }
 
   static bool classof(const Stmt *T) {
@@ -789,11 +807,12 @@ public:
   /// used.
   SourceLocation getUsedLocation() const { return Loc; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    // Default argument expressions have no representation in the
-    // source, so they have an empty source range.
-    return SourceRange();
-  }
+  // Default argument expressions have no representation in the
+  // source, so they have an empty source range.
+  SourceLocation getLocStart() const LLVM_READONLY { return SourceLocation(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return SourceLocation(); }
+
+  SourceLocation getExprLoc() const LLVM_READONLY { return Loc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == CXXDefaultArgExprClass;
@@ -866,9 +885,10 @@ public:
   Expr *getSubExpr() { return cast<Expr>(SubExpr); }
   void setSubExpr(Expr *E) { SubExpr = E; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SubExpr->getSourceRange();
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return SubExpr->getLocStart();
   }
+  SourceLocation getLocEnd() const LLVM_READONLY { return SubExpr->getLocEnd();}
 
   // Implement isa/cast/dyncast/etc.
   static bool classof(const Stmt *T) {
@@ -1001,7 +1021,8 @@ public:
     Args[Arg] = ArgExpr;
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY;
+  SourceLocation getLocStart() const LLVM_READONLY;
+  SourceLocation getLocEnd() const LLVM_READONLY;
   SourceRange getParenRange() const { return ParenRange; }
   void setParenRange(SourceRange Range) { ParenRange = Range; }
 
@@ -1057,9 +1078,9 @@ public:
   SourceLocation getRParenLoc() const { return RParenLoc; }
   void setRParenLoc(SourceLocation L) { RParenLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(TyBeginLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return TyBeginLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == CXXFunctionalCastExprClass;
   }
@@ -1089,13 +1110,15 @@ public:
                          ArrayRef<Expr *> Args,
                          SourceRange parenRange,
                          bool HadMultipleCandidates,
-                         bool ZeroInitialization = false);
+                         bool ListInitialization,
+                         bool ZeroInitialization);
   explicit CXXTemporaryObjectExpr(EmptyShell Empty)
     : CXXConstructExpr(CXXTemporaryObjectExprClass, Empty), Type() { }
 
   TypeSourceInfo *getTypeSourceInfo() const { return Type; }
 
-  SourceRange getSourceRange() const LLVM_READONLY;
+  SourceLocation getLocStart() const LLVM_READONLY;
+  SourceLocation getLocEnd() const LLVM_READONLY;
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == CXXTemporaryObjectExprClass;
@@ -1111,7 +1134,7 @@ public:
 /// \code
 /// void low_pass_filter(std::vector<double> &values, double cutoff) {
 ///   values.erase(std::remove_if(values.begin(), values.end(),
-//                                [=](double value) { return value > cutoff; });
+///                               [=](double value) { return value > cutoff; });
 /// }
 /// \endcode
 ///
@@ -1393,9 +1416,10 @@ public:
     return T->getStmtClass() == LambdaExprClass;
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(IntroducerRange.getBegin(), ClosingBrace);
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return IntroducerRange.getBegin();
   }
+  SourceLocation getLocEnd() const LLVM_READONLY { return ClosingBrace; }
 
   child_range children() {
     return child_range(getStoredStmts(), getStoredStmts() + NumCaptures + 1);
@@ -1434,7 +1458,8 @@ public:
 
   SourceLocation getRParenLoc() const { return RParenLoc; }
 
-  SourceRange getSourceRange() const LLVM_READONLY;
+  SourceLocation getLocStart() const LLVM_READONLY;
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == CXXScalarValueInitExprClass;
@@ -1621,6 +1646,8 @@ public:
   SourceRange getSourceRange() const LLVM_READONLY {
     return Range;
   }
+  SourceLocation getLocStart() const LLVM_READONLY { return getStartLoc(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return getEndLoc(); }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == CXXNewExprClass;
@@ -1688,9 +1715,8 @@ public:
   /// return an invalid type.
   QualType getDestroyedType() const;
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(Loc, Argument->getLocEnd());
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
+  SourceLocation getLocEnd() const LLVM_READONLY {return Argument->getLocEnd();}
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == CXXDeleteExprClass;
@@ -1878,7 +1904,8 @@ public:
     DestroyedType = PseudoDestructorTypeStorage(Info);
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY;
+  SourceLocation getLocStart() const LLVM_READONLY {return Base->getLocStart();}
+  SourceLocation getLocEnd() const LLVM_READONLY;
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == CXXPseudoDestructorExprClass;
@@ -1925,7 +1952,8 @@ public:
     : Expr(UnaryTypeTraitExprClass, Empty), UTT(0), Value(false),
       QueriedType() { }
 
-  SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(Loc, RParen);}
+  SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParen; }
 
   UnaryTypeTrait getTrait() const { return static_cast<UnaryTypeTrait>(UTT); }
 
@@ -1990,9 +2018,8 @@ public:
     : Expr(BinaryTypeTraitExprClass, Empty), BTT(0), Value(false),
       LhsType(), RhsType() { }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(Loc, RParen);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParen; }
 
   BinaryTypeTrait getTrait() const {
     return static_cast<BinaryTypeTrait>(BTT);
@@ -2097,8 +2124,9 @@ public:
     return getTypeSourceInfos() + getNumArgs(); 
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(Loc, RParenLoc); }
-  
+  SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == TypeTraitExprClass;
   }
@@ -2159,9 +2187,8 @@ public:
 
   virtual ~ArrayTypeTraitExpr() { }
 
-  virtual SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(Loc, RParen);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParen; }
 
   ArrayTypeTrait getTrait() const { return static_cast<ArrayTypeTrait>(ATT); }
 
@@ -2221,9 +2248,8 @@ public:
     : Expr(ExpressionTraitExprClass, Empty), ET(0), Value(false),
       QueriedExpression() { }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(Loc, RParen);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParen; }
 
   ExpressionTrait getTrait() const { return static_cast<ExpressionTrait>(ET); }
 
@@ -2411,7 +2437,7 @@ public:
   ///
   /// This points to the same data as getExplicitTemplateArgs(), but
   /// returns null if there are no explicit template arguments.
-  const ASTTemplateArgumentListInfo *getOptionalExplicitTemplateArgs() {
+  const ASTTemplateArgumentListInfo *getOptionalExplicitTemplateArgs() const {
     if (!hasExplicitTemplateArgs()) return 0;
     return &getExplicitTemplateArgs();
   }
@@ -2512,13 +2538,15 @@ public:
   /// that was looked in to find these results.
   CXXRecordDecl *getNamingClass() const { return NamingClass; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    SourceRange Range(getNameInfo().getSourceRange());
-    if (getQualifierLoc())
-      Range.setBegin(getQualifierLoc().getBeginLoc());
+  SourceLocation getLocStart() const LLVM_READONLY {
+    if (NestedNameSpecifierLoc l = getQualifierLoc())
+      return l.getBeginLoc();
+    return getNameInfo().getLocStart();
+  }
+  SourceLocation getLocEnd() const LLVM_READONLY {
     if (hasExplicitTemplateArgs())
-      Range.setEnd(getRAngleLoc());
-    return Range;
+      return getRAngleLoc();
+    return getNameInfo().getLocEnd();
   }
 
   child_range children() { return child_range(); }
@@ -2647,7 +2675,7 @@ public:
   /// \brief Retrieves the optional explicit template arguments.
   /// This points to the same data as getExplicitTemplateArgs(), but
   /// returns null if there are no explicit template arguments.
-  const ASTTemplateArgumentListInfo *getOptionalExplicitTemplateArgs() {
+  const ASTTemplateArgumentListInfo *getOptionalExplicitTemplateArgs() const {
     if (!hasExplicitTemplateArgs()) return 0;
     return &getExplicitTemplateArgs();
   }
@@ -2666,11 +2694,13 @@ public:
     return getExplicitTemplateArgs().NumTemplateArgs;
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    SourceRange Range(QualifierLoc.getBeginLoc(), getLocation());
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return QualifierLoc.getBeginLoc();
+  }
+  SourceLocation getLocEnd() const LLVM_READONLY {
     if (hasExplicitTemplateArgs())
-      Range.setEnd(getRAngleLoc());
-    return Range;
+      return getRAngleLoc();
+    return getLocation();
   }
 
   static bool classof(const Stmt *T) {
@@ -2740,9 +2770,10 @@ public:
   /// when modifying an existing AST to preserve its invariants.
   void setSubExpr(Expr *E) { SubExpr = E; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SubExpr->getSourceRange();
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return SubExpr->getLocStart();
   }
+  SourceLocation getLocEnd() const LLVM_READONLY { return SubExpr->getLocEnd();}
 
   // Implement isa/cast/dyncast/etc.
   static bool classof(const Stmt *T) {
@@ -2855,7 +2886,8 @@ public:
     *(arg_begin() + I) = E;
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY;
+  SourceLocation getLocStart() const LLVM_READONLY;
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == CXXUnresolvedConstructExprClass;
@@ -3061,7 +3093,7 @@ public:
   /// \brief Retrieves the optional explicit template arguments.
   /// This points to the same data as getExplicitTemplateArgs(), but
   /// returns null if there are no explicit template arguments.
-  const ASTTemplateArgumentListInfo *getOptionalExplicitTemplateArgs() {
+  const ASTTemplateArgumentListInfo *getOptionalExplicitTemplateArgs() const {
     if (!hasExplicitTemplateArgs()) return 0;
     return &getExplicitTemplateArgs();
   }
@@ -3089,20 +3121,18 @@ public:
     return getExplicitTemplateArgs().NumTemplateArgs;
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    SourceRange Range;
+  SourceLocation getLocStart() const LLVM_READONLY {
     if (!isImplicitAccess())
-      Range.setBegin(Base->getSourceRange().getBegin());
-    else if (getQualifier())
-      Range.setBegin(getQualifierLoc().getBeginLoc());
-    else
-      Range.setBegin(MemberNameInfo.getBeginLoc());
+      return Base->getLocStart();
+    if (getQualifier())
+      return getQualifierLoc().getBeginLoc();
+    return MemberNameInfo.getBeginLoc();
 
+  }
+  SourceLocation getLocEnd() const LLVM_READONLY {
     if (hasExplicitTemplateArgs())
-      Range.setEnd(getRAngleLoc());
-    else
-      Range.setEnd(MemberNameInfo.getEndLoc());
-    return Range;
+      return getRAngleLoc();
+    return MemberNameInfo.getEndLoc();
   }
 
   static bool classof(const Stmt *T) {
@@ -3226,16 +3256,17 @@ public:
   // expression refers to.
   SourceLocation getMemberLoc() const { return getNameLoc(); }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    SourceRange Range = getMemberNameInfo().getSourceRange();
+  SourceLocation getLocStart() const LLVM_READONLY {
     if (!isImplicitAccess())
-      Range.setBegin(Base->getSourceRange().getBegin());
-    else if (getQualifierLoc())
-      Range.setBegin(getQualifierLoc().getBeginLoc());
-
+      return Base->getLocStart();
+    if (NestedNameSpecifierLoc l = getQualifierLoc())
+      return l.getBeginLoc();
+    return getMemberNameInfo().getLocStart();
+  }
+  SourceLocation getLocEnd() const LLVM_READONLY {
     if (hasExplicitTemplateArgs())
-      Range.setEnd(getRAngleLoc());
-    return Range;
+      return getRAngleLoc();
+    return getMemberNameInfo().getLocEnd();
   }
 
   static bool classof(const Stmt *T) {
@@ -3277,6 +3308,8 @@ public:
 
   Expr *getOperand() const { return static_cast<Expr*>(Operand); }
 
+  SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); }
   SourceRange getSourceRange() const LLVM_READONLY { return Range; }
 
   bool getValue() const { return Value; }
@@ -3323,7 +3356,7 @@ class PackExpansionExpr : public Expr {
 
 public:
   PackExpansionExpr(QualType T, Expr *Pattern, SourceLocation EllipsisLoc,
-                    llvm::Optional<unsigned> NumExpansions)
+                    Optional<unsigned> NumExpansions)
     : Expr(PackExpansionExprClass, T, Pattern->getValueKind(),
            Pattern->getObjectKind(), /*TypeDependent=*/true,
            /*ValueDependent=*/true, /*InstantiationDependent=*/true,
@@ -3346,16 +3379,17 @@ public:
 
   /// \brief Determine the number of expansions that will be produced when
   /// this pack expansion is instantiated, if already known.
-  llvm::Optional<unsigned> getNumExpansions() const {
+  Optional<unsigned> getNumExpansions() const {
     if (NumExpansions)
       return NumExpansions - 1;
 
-    return llvm::Optional<unsigned>();
+    return None;
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(Pattern->getLocStart(), EllipsisLoc);
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return Pattern->getLocStart();
   }
+  SourceLocation getLocEnd() const LLVM_READONLY { return EllipsisLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == PackExpansionExprClass;
@@ -3458,9 +3492,8 @@ public:
     return Length;
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(OperatorLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return OperatorLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == SizeOfPackExprClass;
@@ -3500,7 +3533,8 @@ public:
       Param(param), Replacement(replacement), NameLoc(loc) {}
 
   SourceLocation getNameLoc() const { return NameLoc; }
-  SourceRange getSourceRange() const LLVM_READONLY { return NameLoc; }
+  SourceLocation getLocStart() const LLVM_READONLY { return NameLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return NameLoc; }
 
   Expr *getReplacement() const { return cast<Expr>(Replacement); }
 
@@ -3561,7 +3595,8 @@ public:
   /// template arguments.
   TemplateArgument getArgumentPack() const;
 
-  SourceRange getSourceRange() const LLVM_READONLY { return NameLoc; }
+  SourceLocation getLocStart() const LLVM_READONLY { return NameLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return NameLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == SubstNonTypeTemplateParmPackExprClass;
@@ -3606,7 +3641,7 @@ public:
   static FunctionParmPackExpr *Create(ASTContext &Context, QualType T,
                                       ParmVarDecl *ParamPack,
                                       SourceLocation NameLoc,
-                                      llvm::ArrayRef<Decl*> Params);
+                                      ArrayRef<Decl *> Params);
   static FunctionParmPackExpr *CreateEmpty(ASTContext &Context,
                                            unsigned NumParams);
 
@@ -3628,7 +3663,8 @@ public:
   /// \brief Get an expansion of the parameter pack by index.
   ParmVarDecl *getExpansion(unsigned I) const { return begin()[I]; }
 
-  SourceRange getSourceRange() const LLVM_READONLY { return NameLoc; }
+  SourceLocation getLocStart() const LLVM_READONLY { return NameLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return NameLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == FunctionParmPackExprClass;
@@ -3684,8 +3720,11 @@ public:
     return getValueKind() == VK_LValue;
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return Temporary->getSourceRange();
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return Temporary->getLocStart();
+  }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return Temporary->getLocEnd();
   }
 
   static bool classof(const Stmt *T) {
diff --git a/include/clang/AST/ExprObjC.h b/include/clang/AST/ExprObjC.h
index 27f5da0..dfd4527 100644
--- a/include/clang/AST/ExprObjC.h
+++ b/include/clang/AST/ExprObjC.h
@@ -44,9 +44,8 @@ public:
   SourceLocation getAtLoc() const { return AtLoc; }
   void setAtLoc(SourceLocation L) { AtLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(AtLoc, String->getLocEnd());
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return AtLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return String->getLocEnd(); }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ObjCStringLiteralClass;
@@ -72,8 +71,9 @@ public:
   bool getValue() const { return Value; }
   void setValue(bool V) { Value = V; }
     
-  SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(Loc); }
-    
+  SourceLocation getLocStart() const LLVM_READONLY { return Loc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Loc; }
+
   SourceLocation getLocation() const { return Loc; }
   void setLocation(SourceLocation L) { Loc = L; }
     
@@ -112,6 +112,8 @@ public:
   
   SourceLocation getAtLoc() const { return Range.getBegin(); }
   
+  SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); }
   SourceRange getSourceRange() const LLVM_READONLY {
     return Range;
   }
@@ -133,7 +135,7 @@ class ObjCArrayLiteral : public Expr {
   SourceRange Range;
   ObjCMethodDecl *ArrayWithObjectsMethod;
   
-  ObjCArrayLiteral(llvm::ArrayRef<Expr *> Elements,
+  ObjCArrayLiteral(ArrayRef<Expr *> Elements,
                    QualType T, ObjCMethodDecl * Method,
                    SourceRange SR);
   
@@ -142,12 +144,14 @@ class ObjCArrayLiteral : public Expr {
 
 public:
   static ObjCArrayLiteral *Create(ASTContext &C, 
-                                  llvm::ArrayRef<Expr *> Elements,
+                                  ArrayRef<Expr *> Elements,
                                   QualType T, ObjCMethodDecl * Method,
                                   SourceRange SR);
 
   static ObjCArrayLiteral *CreateEmpty(ASTContext &C, unsigned NumElements);
 
+  SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); }
   SourceRange getSourceRange() const LLVM_READONLY { return Range; }
 
   static bool classof(const Stmt *T) {
@@ -202,12 +206,18 @@ struct ObjCDictionaryElement {
   
   /// \brief The number of elements this pack expansion will expand to, if
   /// this is a pack expansion and is known.
-  llvm::Optional<unsigned> NumExpansions;
+  Optional<unsigned> NumExpansions;
 
   /// \brief Determines whether this dictionary element is a pack expansion.
   bool isPackExpansion() const { return EllipsisLoc.isValid(); }
 };
+} // end namespace clang
+
+namespace llvm {
+template <> struct isPodLike<clang::ObjCDictionaryElement> : llvm::true_type {};
+}
 
+namespace clang {
 /// ObjCDictionaryLiteral - AST node to represent objective-c dictionary 
 /// literals; as in:  @{@"name" : NSUserName(), @"date" : [NSDate date] };
 class ObjCDictionaryLiteral : public Expr {
@@ -296,8 +306,7 @@ public:
   ObjCDictionaryElement getKeyValueElement(unsigned Index) const {
     assert((Index < NumElements) && "Arg access out of range!");
     const KeyValuePair &KV = getKeyValues()[Index];
-    ObjCDictionaryElement Result = { KV.Key, KV.Value, SourceLocation(),
-                                     llvm::Optional<unsigned>() };
+    ObjCDictionaryElement Result = { KV.Key, KV.Value, SourceLocation(), None };
     if (HasPackExpansions) {
       const ExpansionData &Expansion = getExpansionData()[Index];
       Result.EllipsisLoc = Expansion.EllipsisLoc;
@@ -310,6 +319,8 @@ public:
   ObjCMethodDecl *getDictWithObjectsMethod() const
     { return DictWithObjectsMethod; }
 
+  SourceLocation getLocStart() const LLVM_READONLY { return Range.getBegin(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Range.getEnd(); }
   SourceRange getSourceRange() const LLVM_READONLY { return Range; }
   
   static bool classof(const Stmt *T) {
@@ -360,9 +371,8 @@ public:
     EncodedType = EncType; 
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(AtLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return AtLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ObjCEncodeExprClass;
@@ -393,9 +403,8 @@ public:
   void setAtLoc(SourceLocation L) { AtLoc = L; }
   void setRParenLoc(SourceLocation L) { RParenLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(AtLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return AtLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
 
   /// getNumArgs - Return the number of actual arguments to this call.
   unsigned getNumArgs() const { return SelName.getNumArgs(); }
@@ -408,9 +417,13 @@ public:
   child_range children() { return child_range(); }
 };
 
-/// ObjCProtocolExpr used for protocol expression in Objective-C.  This is used
-/// as: @protocol(foo), as in:
-///   obj conformsToProtocol:@protocol(foo)]
+/// ObjCProtocolExpr used for protocol expression in Objective-C.
+///
+/// This is used as: \@protocol(foo), as in:
+/// \code
+///   [obj conformsToProtocol:@protocol(foo)]
+/// \endcode
+///
 /// The return type is "Protocol*".
 class ObjCProtocolExpr : public Expr {
   ObjCProtocolDecl *TheProtocol;
@@ -433,9 +446,8 @@ public:
   void setAtLoc(SourceLocation L) { AtLoc = L; }
   void setRParenLoc(SourceLocation L) { RParenLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(AtLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return AtLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ObjCProtocolExprClass;
@@ -453,18 +465,23 @@ class ObjCIvarRefExpr : public Expr {
   ObjCIvarDecl *D;
   Stmt *Base;
   SourceLocation Loc;
+  /// OpLoc - This is the location of '.' or '->'
+  SourceLocation OpLoc;
+  
   bool IsArrow:1;      // True if this is "X->F", false if this is "X.F".
   bool IsFreeIvar:1;   // True if ivar reference has no base (self assumed).
 
 public:
   ObjCIvarRefExpr(ObjCIvarDecl *d, QualType t,
-                  SourceLocation l, Expr *base,
+                  SourceLocation l, SourceLocation oploc,
+                  Expr *base,
                   bool arrow = false, bool freeIvar = false) :
     Expr(ObjCIvarRefExprClass, t, VK_LValue, OK_Ordinary,
          /*TypeDependent=*/false, base->isValueDependent(), 
          base->isInstantiationDependent(),
          base->containsUnexpandedParameterPack()), 
-    D(d), Base(base), Loc(l), IsArrow(arrow), IsFreeIvar(freeIvar) {}
+    D(d), Base(base), Loc(l), OpLoc(oploc),
+    IsArrow(arrow), IsFreeIvar(freeIvar) {}
 
   explicit ObjCIvarRefExpr(EmptyShell Empty)
     : Expr(ObjCIvarRefExprClass, Empty) {}
@@ -485,10 +502,13 @@ public:
   SourceLocation getLocation() const { return Loc; }
   void setLocation(SourceLocation L) { Loc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return isFreeIvar() ? SourceRange(Loc)
-    : SourceRange(getBase()->getLocStart(), Loc);
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return isFreeIvar() ? Loc : getBase()->getLocStart();
   }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Loc; }
+  
+  SourceLocation getOpLoc() const { return OpLoc; }
+  void setOpLoc(SourceLocation L) { OpLoc = L; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ObjCIvarRefExprClass;
@@ -697,11 +717,10 @@ public:
   bool isSuperReceiver() const { return Receiver.is<const Type*>(); }
   bool isClassReceiver() const { return Receiver.is<ObjCInterfaceDecl*>(); }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange((isObjectReceiver() ? getBase()->getLocStart()
-                                           : getReceiverLocation()), 
-                       IdLoc);
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return isObjectReceiver() ? getBase()->getLocStart() :getReceiverLocation();
   }
+  SourceLocation getLocEnd() const LLVM_READONLY { return IdLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ObjCPropertyRefExprClass;
@@ -796,10 +815,12 @@ public:
   
   SourceLocation getRBracket() const { return RBracket; }
   void setRBracket(SourceLocation RB) { RBracket = RB; }
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(SubExprs[BASE]->getLocStart(), RBracket);
+
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return SubExprs[BASE]->getLocStart();
   }
-  
+  SourceLocation getLocEnd() const LLVM_READONLY { return RBracket; }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ObjCSubscriptRefExprClass;
   }
@@ -1335,9 +1356,8 @@ public:
     LBracLoc = R.getBegin();
     RBracLoc = R.getEnd();
   }
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(LBracLoc, RBracLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return LBracLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RBracLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ObjCMessageExprClass;
@@ -1372,16 +1392,20 @@ class ObjCIsaExpr : public Expr {
 
   /// IsaMemberLoc - This is the location of the 'isa'.
   SourceLocation IsaMemberLoc;
+  
+  /// OpLoc - This is the location of '.' or '->'
+  SourceLocation OpLoc;
 
   /// IsArrow - True if this is "X->F", false if this is "X.F".
   bool IsArrow;
 public:
-  ObjCIsaExpr(Expr *base, bool isarrow, SourceLocation l, QualType ty)
+  ObjCIsaExpr(Expr *base, bool isarrow, SourceLocation l, SourceLocation oploc,
+              QualType ty)
     : Expr(ObjCIsaExprClass, ty, VK_LValue, OK_Ordinary,
            /*TypeDependent=*/false, base->isValueDependent(),
            base->isInstantiationDependent(),
            /*ContainsUnexpandedParameterPack=*/false),
-      Base(base), IsaMemberLoc(l), IsArrow(isarrow) {}
+      Base(base), IsaMemberLoc(l), OpLoc(oploc), IsArrow(isarrow) {}
 
   /// \brief Build an empty expression.
   explicit ObjCIsaExpr(EmptyShell Empty) : Expr(ObjCIsaExprClass, Empty) { }
@@ -1396,10 +1420,19 @@ public:
   /// location of 'F'.
   SourceLocation getIsaMemberLoc() const { return IsaMemberLoc; }
   void setIsaMemberLoc(SourceLocation L) { IsaMemberLoc = L; }
+  
+  SourceLocation getOpLoc() const { return OpLoc; }
+  void setOpLoc(SourceLocation L) { OpLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(getBase()->getLocStart(), IsaMemberLoc);
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return getBase()->getLocStart();
+  }
+  
+  SourceLocation getBaseLocEnd() const LLVM_READONLY {
+    return getBase()->getLocEnd();
   }
+  
+  SourceLocation getLocEnd() const LLVM_READONLY { return IsaMemberLoc; }
 
   SourceLocation getExprLoc() const LLVM_READONLY { return IsaMemberLoc; }
 
@@ -1469,9 +1502,11 @@ public:
   child_range children() { return child_range(&Operand, &Operand+1); }  
 
   // Source locations are determined by the subexpression.
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return Operand->getSourceRange();
+  SourceLocation getLocStart() const LLVM_READONLY {
+    return Operand->getLocStart();
   }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Operand->getLocEnd();}
+
   SourceLocation getExprLoc() const LLVM_READONLY {
     return getSubExpr()->getExprLoc();
   }
@@ -1520,8 +1555,9 @@ public:
   /// \brief The location of the bridge keyword.
   SourceLocation getBridgeKeywordLoc() const { return BridgeKeywordLoc; }
   
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(LParenLoc, getSubExpr()->getLocEnd());
+  SourceLocation getLocStart() const LLVM_READONLY { return LParenLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return getSubExpr()->getLocEnd();
   }
   
   static bool classof(const Stmt *T) {
diff --git a/include/clang/AST/ExternalASTSource.h b/include/clang/AST/ExternalASTSource.h
index db2bddb..81fcf24 100644
--- a/include/clang/AST/ExternalASTSource.h
+++ b/include/clang/AST/ExternalASTSource.h
@@ -14,8 +14,8 @@
 #ifndef LLVM_CLANG_AST_EXTERNAL_AST_SOURCE_H
 #define LLVM_CLANG_AST_EXTERNAL_AST_SOURCE_H
 
-#include "clang/AST/DeclBase.h"
 #include "clang/AST/CharUnits.h"
+#include "clang/AST/DeclBase.h"
 #include "llvm/ADT/DenseMap.h"
 
 namespace clang {
@@ -24,7 +24,10 @@ class ASTConsumer;
 class CXXBaseSpecifier;
 class DeclarationName;
 class ExternalSemaSource; // layering violation required for downcasting
+class FieldDecl;
+class Module;
 class NamedDecl;
+class RecordDecl;
 class Selector;
 class Stmt;
 class TagDecl;
@@ -115,23 +118,28 @@ public:
   /// The default implementation of this method is a no-op.
   virtual CXXBaseSpecifier *GetExternalCXXBaseSpecifiers(uint64_t Offset);
 
-  /// \brief Finds all declarations with the given name in the
-  /// given context.
-  ///
-  /// Generally the final step of this method is either to call
-  /// SetExternalVisibleDeclsForName or to recursively call lookup on
-  /// the DeclContext after calling SetExternalVisibleDecls.
+  /// \brief Update an out-of-date identifier.
+  virtual void updateOutOfDateIdentifier(IdentifierInfo &II) { }
+
+  /// \brief Find all declarations with the given name in the given context,
+  /// and add them to the context by calling SetExternalVisibleDeclsForName
+  /// or SetNoExternalVisibleDeclsForName.
+  /// \return \c true if any declarations might have been found, \c false if
+  /// we definitely have no declarations with tbis name.
   ///
-  /// The default implementation of this method is a no-op.
-  virtual DeclContextLookupResult
+  /// The default implementation of this method is a no-op returning \c false.
+  virtual bool
   FindExternalVisibleDeclsByName(const DeclContext *DC, DeclarationName Name);
 
   /// \brief Ensures that the table of all visible declarations inside this
   /// context is up to date.
   ///
-  /// The default implementation of this functino is a no-op.
+  /// The default implementation of this function is a no-op.
   virtual void completeVisibleDeclsMap(const DeclContext *DC);
 
+  /// \brief Retrieve the module that corresponds to the given module ID.
+  virtual Module *getModule(unsigned ID) { return 0; }
+
   /// \brief Finds all declarations lexically contained within the given
   /// DeclContext, after applying an optional filter predicate.
   ///
diff --git a/include/clang/AST/LambdaMangleContext.h b/include/clang/AST/LambdaMangleContext.h
index 3e2fbad..bbaee26 100644
--- a/include/clang/AST/LambdaMangleContext.h
+++ b/include/clang/AST/LambdaMangleContext.h
@@ -14,7 +14,9 @@
 #ifndef LLVM_CLANG_LAMBDAMANGLECONTEXT_H
 #define LLVM_CLANG_LAMBDAMANGLECONTEXT_H
 
+#include "clang/Basic/LLVM.h"
 #include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/IntrusiveRefCntPtr.h"
 
 namespace clang {
 
@@ -23,7 +25,7 @@ class FunctionProtoType;
 
 /// \brief Keeps track of the mangled names of lambda expressions within a
 /// particular context.
-class LambdaMangleContext {
+class LambdaMangleContext : public RefCountedBase<LambdaMangleContext> {
   llvm::DenseMap<const FunctionProtoType *, unsigned> ManglingNumbers;
   
 public:
diff --git a/include/clang/AST/Makefile b/include/clang/AST/Makefile
index 7fb33f2..ae84bcf 100644
--- a/include/clang/AST/Makefile
+++ b/include/clang/AST/Makefile
@@ -1,8 +1,12 @@
 CLANG_LEVEL := ../../..
 TD_SRC_DIR = $(PROJ_SRC_DIR)/../Basic
-BUILT_SOURCES = Attrs.inc AttrImpl.inc StmtNodes.inc DeclNodes.inc \
+BUILT_SOURCES = Attrs.inc AttrImpl.inc AttrDump.inc \
+                StmtNodes.inc DeclNodes.inc \
                 CommentNodes.inc CommentHTMLTags.inc \
-                CommentHTMLTagsProperties.inc CommentCommandInfo.inc
+                CommentHTMLTagsProperties.inc \
+                CommentHTMLNamedCharacterReferences.inc \
+                CommentCommandInfo.inc \
+                CommentCommandList.inc
 
 TABLEGEN_INC_FILES_COMMON = 1
 
@@ -20,6 +24,12 @@ $(ObjDir)/AttrImpl.inc.tmp : $(TD_SRC_DIR)/Attr.td $(CLANG_TBLGEN) \
 	$(Verb) $(ClangTableGen) -gen-clang-attr-impl -o $(call SYSPATH, $@) \
 		-I $(PROJ_SRC_DIR)/../../ $<
 
+$(ObjDir)/AttrDump.inc.tmp : $(TD_SRC_DIR)/Attr.td $(CLANG_TBLGEN) \
+                              $(ObjDir)/.dir
+	$(Echo) "Building Clang attribute dumper with tblgen"
+	$(Verb) $(ClangTableGen) -gen-clang-attr-dump -o $(call SYSPATH, $@) \
+		-I $(PROJ_SRC_DIR)/../../ $<
+
 $(ObjDir)/StmtNodes.inc.tmp : $(TD_SRC_DIR)/StmtNodes.td $(CLANG_TBLGEN) \
                               $(ObjDir)/.dir
 	$(Echo) "Building Clang statement node tables with tblgen"
@@ -45,8 +55,19 @@ $(ObjDir)/CommentHTMLTagsProperties.inc.tmp : $(PROJ_SRC_DIR)/CommentHTMLTags.td
 	$(Echo) "Building Clang comment HTML tag properties with tblgen"
 	$(Verb) $(ClangTableGen) -gen-clang-comment-html-tags-properties -o $(call SYSPATH, $@) $<
 
+$(ObjDir)/CommentHTMLNamedCharacterReferences.inc.tmp : \
+                    $(PROJ_SRC_DIR)/CommentHTMLNamedCharacterReferences.td \
+                    $(CLANG_TBLGEN) $(ObjDir)/.dir
+	$(Echo) "Building Clang named character reference translation function with tblgen"
+	$(Verb) $(ClangTableGen) -gen-clang-comment-html-named-character-references -o $(call SYSPATH, $@) $<
+
 $(ObjDir)/CommentCommandInfo.inc.tmp : $(PROJ_SRC_DIR)/CommentCommands.td \
                                               $(CLANG_TBLGEN) $(ObjDir)/.dir
 	$(Echo) "Building Clang comment command info with tblgen"
 	$(Verb) $(ClangTableGen) -gen-clang-comment-command-info -o $(call SYSPATH, $@) $<
 
+$(ObjDir)/CommentCommandList.inc.tmp : $(PROJ_SRC_DIR)/CommentCommands.td \
+                                              $(CLANG_TBLGEN) $(ObjDir)/.dir
+	$(Echo) "Building Clang list of comment commands with tblgen"
+	$(Verb) $(ClangTableGen) -gen-clang-comment-command-list -o $(call SYSPATH, $@) $<
+
diff --git a/include/clang/AST/Mangle.h b/include/clang/AST/Mangle.h
index a0dffb9..94faa19 100644
--- a/include/clang/AST/Mangle.h
+++ b/include/clang/AST/Mangle.h
@@ -17,8 +17,8 @@
 #include "clang/AST/Type.h"
 #include "clang/Basic/ABI.h"
 #include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringRef.h"
 #include "llvm/Support/raw_ostream.h"
 
 namespace clang {
diff --git a/include/clang/AST/NSAPI.h b/include/clang/AST/NSAPI.h
index f9fd1f9..0b21b03 100644
--- a/include/clang/AST/NSAPI.h
+++ b/include/clang/AST/NSAPI.h
@@ -52,7 +52,7 @@ public:
   Selector getNSStringSelector(NSStringMethodKind MK) const;
 
   /// \brief Return NSStringMethodKind if \param Sel is such a selector.
-  llvm::Optional<NSStringMethodKind> getNSStringMethodKind(Selector Sel) const;
+  Optional<NSStringMethodKind> getNSStringMethodKind(Selector Sel) const;
 
   /// \brief Returns true if the expression \param E is a reference of
   /// "NSUTF8StringEncoding" enum constant.
@@ -84,7 +84,7 @@ public:
   Selector getNSArraySelector(NSArrayMethodKind MK) const;
 
   /// \brief Return NSArrayMethodKind if \p Sel is such a selector.
-  llvm::Optional<NSArrayMethodKind> getNSArrayMethodKind(Selector Sel);
+  Optional<NSArrayMethodKind> getNSArrayMethodKind(Selector Sel);
 
   /// \brief Enumerates the NSDictionary methods used to generate literals.
   enum NSDictionaryMethodKind {
@@ -96,17 +96,17 @@ public:
     NSDict_dictionaryWithObjectsAndKeys,
     NSDict_initWithDictionary,
     NSDict_initWithObjectsAndKeys,
+    NSDict_initWithObjectsForKeys,
     NSDict_objectForKey,
     NSMutableDict_setObjectForKey
   };
-  static const unsigned NumNSDictionaryMethods = 10;
+  static const unsigned NumNSDictionaryMethods = 11;
 
   /// \brief The Objective-C NSDictionary selectors.
   Selector getNSDictionarySelector(NSDictionaryMethodKind MK) const;
 
   /// \brief Return NSDictionaryMethodKind if \p Sel is such a selector.
-  llvm::Optional<NSDictionaryMethodKind>
-      getNSDictionaryMethodKind(Selector Sel);
+  Optional<NSDictionaryMethodKind> getNSDictionaryMethodKind(Selector Sel);
 
   /// \brief Returns selector for "objectForKeyedSubscript:".
   Selector getObjectForKeyedSubscriptSelector() const {
@@ -170,12 +170,12 @@ public:
   }
 
   /// \brief Return NSNumberLiteralMethodKind if \p Sel is such a selector.
-  llvm::Optional<NSNumberLiteralMethodKind>
+  Optional<NSNumberLiteralMethodKind>
       getNSNumberLiteralMethodKind(Selector Sel) const;
 
   /// \brief Determine the appropriate NSNumber factory method kind for a
   /// literal of the given type.
-  llvm::Optional<NSNumberLiteralMethodKind>
+  Optional<NSNumberLiteralMethodKind>
       getNSNumberFactoryMethodKind(QualType T) const;
 
   /// \brief Returns true if \param T is a typedef of "BOOL" in objective-c.
diff --git a/include/clang/AST/NestedNameSpecifier.h b/include/clang/AST/NestedNameSpecifier.h
index bf9e1cb..58f3986 100644
--- a/include/clang/AST/NestedNameSpecifier.h
+++ b/include/clang/AST/NestedNameSpecifier.h
@@ -117,7 +117,7 @@ public:
   /// \brief Builds a nested name specifier that names a namespace.
   static NestedNameSpecifier *Create(const ASTContext &Context,
                                      NestedNameSpecifier *Prefix,
-                                     NamespaceDecl *NS);
+                                     const NamespaceDecl *NS);
 
   /// \brief Builds a nested name specifier that names a namespace alias.
   static NestedNameSpecifier *Create(const ASTContext &Context,
diff --git a/include/clang/AST/OperationKinds.h b/include/clang/AST/OperationKinds.h
index 18169fd..5e41d95 100644
--- a/include/clang/AST/OperationKinds.h
+++ b/include/clang/AST/OperationKinds.h
@@ -292,7 +292,10 @@ enum CastKind {
 
   // Convert a builtin function to a function pointer; only allowed in the
   // callee of a call expression.
-  CK_BuiltinFnToFnPtr
+  CK_BuiltinFnToFnPtr,
+
+  // Convert a zero value for OpenCL event_t initialization.
+  CK_ZeroToOCLEvent
 };
 
 static const CastKind CK_Invalid = static_cast<CastKind>(-1);
diff --git a/include/clang/AST/PrettyPrinter.h b/include/clang/AST/PrettyPrinter.h
index 7babc1b..e3c09e7 100644
--- a/include/clang/AST/PrettyPrinter.h
+++ b/include/clang/AST/PrettyPrinter.h
@@ -14,14 +14,15 @@
 #ifndef LLVM_CLANG_AST_PRETTY_PRINTER_H
 #define LLVM_CLANG_AST_PRETTY_PRINTER_H
 
-#include "clang/Basic/LangOptions.h"
 #include "clang/Basic/LLVM.h"
+#include "clang/Basic/LangOptions.h"
 
 namespace clang {
 
+class LangOptions;
+class SourceManager;
 class Stmt;
 class TagDecl;
-class LangOptions;
 
 class PrinterHelper {
 public:
@@ -39,8 +40,7 @@ struct PrintingPolicy {
       SuppressUnwrittenScope(false), SuppressInitializers(false),
       ConstantArraySizeAsWritten(false), AnonymousTagLocations(true),
       SuppressStrongLifetime(false), Bool(LO.Bool),
-      TerseOutput(false), SuppressAttributes(false),
-      DumpSourceManager(0) { }
+      TerseOutput(false), PolishForDeclaration(false) { }
 
   /// \brief What language we're printing.
   LangOptions LangOpts;
@@ -142,15 +142,10 @@ struct PrintingPolicy {
   /// only the requested declaration.
   unsigned TerseOutput : 1;
   
-  /// \brief When true, do not print attributes attached to the declaration.
+  /// \brief When true, do certain refinement needed for producing proper
+  /// declaration tag; such as, do not print attributes attached to the declaration.
   ///
-  unsigned SuppressAttributes : 1;
-
-  /// \brief If we are "dumping" rather than "pretty-printing", this points to
-  /// a SourceManager which will be used to dump SourceLocations. Dumping
-  /// involves printing the internal details of the AST and pretty-printing
-  /// involves printing something similar to source code.
-  SourceManager *DumpSourceManager;
+  unsigned PolishForDeclaration : 1;
 };
 
 } // end namespace clang
diff --git a/include/clang/AST/RecursiveASTVisitor.h b/include/clang/AST/RecursiveASTVisitor.h
index f96e067..0191964 100644
--- a/include/clang/AST/RecursiveASTVisitor.h
+++ b/include/clang/AST/RecursiveASTVisitor.h
@@ -18,6 +18,7 @@
 #include "clang/AST/DeclCXX.h"
 #include "clang/AST/DeclFriend.h"
 #include "clang/AST/DeclObjC.h"
+#include "clang/AST/DeclOpenMP.h"
 #include "clang/AST/DeclTemplate.h"
 #include "clang/AST/Expr.h"
 #include "clang/AST/ExprCXX.h"
@@ -464,20 +465,15 @@ template<typename Derived>
 bool RecursiveASTVisitor<Derived>::dataTraverseNode(Stmt *S,
                                                     bool &EnqueueChildren) {
 
-// The cast for DISPATCH_WALK is needed for older versions of g++, but causes
-// problems for MSVC.  So we'll skip the cast entirely for MSVC.
-#if defined(_MSC_VER)
-  #define GCC_CAST(CLASS)
-#else
-  #define GCC_CAST(CLASS) (bool (RecursiveASTVisitor::*)(CLASS*))
-#endif
-
   // Dispatch to the corresponding WalkUpFrom* function only if the derived
   // class didn't override Traverse* (and thus the traversal is trivial).
 #define DISPATCH_WALK(NAME, CLASS, VAR) \
-  if (&RecursiveASTVisitor::Traverse##NAME == \
-      GCC_CAST(CLASS)&Derived::Traverse##NAME) \
-    return getDerived().WalkUpFrom##NAME(static_cast<CLASS*>(VAR)); \
+  { \
+    bool (Derived::*DerivedFn)(CLASS*) = &Derived::Traverse##NAME; \
+    bool (Derived::*BaseFn)(CLASS*) = &RecursiveASTVisitor::Traverse##NAME; \
+    if (DerivedFn == BaseFn) \
+      return getDerived().WalkUpFrom##NAME(static_cast<CLASS*>(VAR)); \
+  } \
   EnqueueChildren = false; \
   return getDerived().Traverse##NAME(static_cast<CLASS*>(VAR));
 
@@ -516,7 +512,6 @@ bool RecursiveASTVisitor<Derived>::dataTraverseNode(Stmt *S,
   }
 
 #undef DISPATCH_WALK
-#undef GCC_CAST
 
   return true;
 }
@@ -600,7 +595,7 @@ bool RecursiveASTVisitor<Derived>::TraverseTypeLoc(TypeLoc TL) {
 #define ABSTRACT_TYPELOC(CLASS, BASE)
 #define TYPELOC(CLASS, BASE) \
   case TypeLoc::CLASS: \
-    return getDerived().Traverse##CLASS##TypeLoc(*cast<CLASS##TypeLoc>(&TL));
+    return getDerived().Traverse##CLASS##TypeLoc(TL.castAs<CLASS##TypeLoc>());
 #include "clang/AST/TypeLocNodes.def"
   }
 
@@ -1263,6 +1258,8 @@ DEF_TRAVERSE_DECL(BlockDecl, {
     return true;
   })
 
+DEF_TRAVERSE_DECL(EmptyDecl, { })
+
 DEF_TRAVERSE_DECL(FileScopeAsmDecl, {
     TRY_TO(TraverseStmt(D->getAsmString()));
   })
@@ -1393,6 +1390,14 @@ DEF_TRAVERSE_DECL(UsingDirectiveDecl, {
 
 DEF_TRAVERSE_DECL(UsingShadowDecl, { })
 
+DEF_TRAVERSE_DECL(OMPThreadPrivateDecl, {
+    for (OMPThreadPrivateDecl::varlist_iterator I = D->varlist_begin(),
+                                                E = D->varlist_end();
+         I != E; ++I) {
+      TRY_TO(TraverseStmt(*I));
+    }
+  })
+
 // A helper method for TemplateDecl's children.
 template<typename Derived>
 bool RecursiveASTVisitor<Derived>::TraverseTemplateParameterListHelper(
@@ -1716,7 +1721,7 @@ bool RecursiveASTVisitor<Derived>::TraverseFunctionHelper(FunctionDecl *D) {
   // FunctionNoProtoType or FunctionProtoType, or a typedef.  This
   // also covers the return type and the function parameters,
   // including exception specifications.
-  if (clang::TypeSourceInfo *TSI = D->getTypeSourceInfo()) {
+  if (TypeSourceInfo *TSI = D->getTypeSourceInfo()) {
     TRY_TO(TraverseTypeLoc(TSI->getTypeLoc()));
   }
 
@@ -2106,8 +2111,7 @@ bool RecursiveASTVisitor<Derived>::TraverseLambdaExpr(LambdaExpr *S) {
     if (S->hasExplicitParameters() && S->hasExplicitResultType()) {
       // Visit the whole type.
       TRY_TO(TraverseTypeLoc(TL));
-    } else if (isa<FunctionProtoTypeLoc>(TL)) {
-      FunctionProtoTypeLoc Proto = cast<FunctionProtoTypeLoc>(TL);
+    } else if (FunctionProtoTypeLoc Proto = TL.getAs<FunctionProtoTypeLoc>()) {
       if (S->hasExplicitParameters()) {
         // Visit parameters.
         for (unsigned I = 0, N = Proto.getNumArgs(); I != N; ++I) {
diff --git a/include/clang/AST/Stmt.h b/include/clang/AST/Stmt.h
index a9bbb48..cf8fc24 100644
--- a/include/clang/AST/Stmt.h
+++ b/include/clang/AST/Stmt.h
@@ -14,16 +14,14 @@
 #ifndef LLVM_CLANG_AST_STMT_H
 #define LLVM_CLANG_AST_STMT_H
 
+#include "clang/AST/DeclGroup.h"
+#include "clang/AST/StmtIterator.h"
+#include "clang/Basic/IdentifierTable.h"
 #include "clang/Basic/LLVM.h"
 #include "clang/Basic/SourceLocation.h"
-#include "clang/AST/PrettyPrinter.h"
-#include "clang/AST/StmtIterator.h"
-#include "clang/AST/DeclGroup.h"
-#include "clang/AST/Attr.h"
-#include "clang/Lex/Token.h"
-#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/ArrayRef.h"
 #include "llvm/Support/Compiler.h"
-#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/ErrorHandling.h"
 #include <string>
 
 namespace llvm {
@@ -32,15 +30,19 @@ namespace llvm {
 
 namespace clang {
   class ASTContext;
-  class Expr;
+  class Attr;
   class Decl;
-  class ParmVarDecl;
-  class QualType;
+  class Expr;
   class IdentifierInfo;
   class LabelDecl;
+  class ParmVarDecl;
+  class PrinterHelper;
+  struct PrintingPolicy;
+  class QualType;
   class SourceManager;
   class StringLiteral;
   class SwitchStmt;
+  class Token;
   class VarDecl;
 
   //===--------------------------------------------------------------------===//
@@ -172,11 +174,20 @@ protected:
     unsigned Kind : 2;
   };
 
+  enum APFloatSemantics {
+    IEEEhalf,
+    IEEEsingle,
+    IEEEdouble,
+    x87DoubleExtended,
+    IEEEquad,
+    PPCDoubleDouble
+  };
+
   class FloatingLiteralBitfields {
     friend class FloatingLiteral;
     unsigned : NumExprBits;
 
-    unsigned IsIEEE : 1; // Distinguishes between PPC128 and IEEE128.
+    unsigned Semantics : 3; // Provides semantics for APFloat construction
     unsigned IsExact : 1;
   };
 
@@ -302,14 +313,10 @@ public:
   // Only allow allocation of Stmts using the allocator in ASTContext
   // or by doing a placement new.
   void* operator new(size_t bytes, ASTContext& C,
-                     unsigned alignment = 8) throw() {
-    return ::operator new(bytes, C, alignment);
-  }
+                     unsigned alignment = 8) throw();
 
   void* operator new(size_t bytes, ASTContext* C,
-                     unsigned alignment = 8) throw() {
-    return ::operator new(bytes, *C, alignment);
-  }
+                     unsigned alignment = 8) throw();
 
   void* operator new(size_t bytes, void* mem) throw() {
     return mem;
@@ -360,16 +367,14 @@ public:
   static void EnableStatistics();
   static void PrintStats();
 
-  /// dump - This does a local dump of the specified AST fragment.  It dumps the
-  /// specified node and a few nodes underneath it, but not the whole subtree.
-  /// This is useful in a debugger.
+  /// \brief Dumps the specified AST fragment and all subtrees to
+  /// \c llvm::errs().
   LLVM_ATTRIBUTE_USED void dump() const;
   LLVM_ATTRIBUTE_USED void dump(SourceManager &SM) const;
   void dump(raw_ostream &OS, SourceManager &SM) const;
 
-  /// dumpAll - This does a dump of the specified AST fragment and all subtrees.
-  void dumpAll() const;
-  void dumpAll(SourceManager &SM) const;
+  /// dumpColor - same as dump(), but forces color highlighting.
+  LLVM_ATTRIBUTE_USED void dumpColor() const;
 
   /// dumpPretty/printPretty - These two methods do a "pretty print" of the AST
   /// back to its original source language syntax.
@@ -470,9 +475,8 @@ public:
   SourceLocation getEndLoc() const { return EndLoc; }
   void setEndLoc(SourceLocation L) { EndLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(StartLoc, EndLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return StartLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return EndLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == DeclStmtClass;
@@ -526,7 +530,8 @@ public:
 
   bool hasLeadingEmptyMacro() const { return HasLeadingEmptyMacro; }
 
-  SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(SemiLoc); }
+  SourceLocation getLocStart() const LLVM_READONLY { return SemiLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return SemiLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == NullStmtClass;
@@ -544,7 +549,7 @@ class CompoundStmt : public Stmt {
   Stmt** Body;
   SourceLocation LBracLoc, RBracLoc;
 public:
-  CompoundStmt(ASTContext &C, Stmt **StmtStart, unsigned NumStmts,
+  CompoundStmt(ASTContext &C, ArrayRef<Stmt*> Stmts,
                SourceLocation LB, SourceLocation RB);
 
   // \brief Build an empty compound statment with a location.
@@ -598,9 +603,8 @@ public:
     return const_reverse_body_iterator(body_begin());
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(LBracLoc, RBracLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return LBracLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RBracLoc; }
 
   SourceLocation getLBracLoc() const { return LBracLoc; }
   void setLBracLoc(SourceLocation L) { LBracLoc = L; }
@@ -627,8 +631,14 @@ protected:
   // A pointer to the following CaseStmt or DefaultStmt class,
   // used by SwitchStmt.
   SwitchCase *NextSwitchCase;
+  SourceLocation KeywordLoc;
+  SourceLocation ColonLoc;
 
-  SwitchCase(StmtClass SC) : Stmt(SC), NextSwitchCase(0) {}
+  SwitchCase(StmtClass SC, SourceLocation KWLoc, SourceLocation ColonLoc)
+    : Stmt(SC), NextSwitchCase(0), KeywordLoc(KWLoc), ColonLoc(ColonLoc) {}
+
+  SwitchCase(StmtClass SC, EmptyShell)
+    : Stmt(SC), NextSwitchCase(0) {}
 
 public:
   const SwitchCase *getNextSwitchCase() const { return NextSwitchCase; }
@@ -637,12 +647,18 @@ public:
 
   void setNextSwitchCase(SwitchCase *SC) { NextSwitchCase = SC; }
 
+  SourceLocation getKeywordLoc() const { return KeywordLoc; }
+  void setKeywordLoc(SourceLocation L) { KeywordLoc = L; }
+  SourceLocation getColonLoc() const { return ColonLoc; }
+  void setColonLoc(SourceLocation L) { ColonLoc = L; }
+
   Stmt *getSubStmt();
   const Stmt *getSubStmt() const {
     return const_cast<SwitchCase*>(this)->getSubStmt();
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(); }
+  SourceLocation getLocStart() const LLVM_READONLY { return KeywordLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY;
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == CaseStmtClass ||
@@ -654,26 +670,22 @@ class CaseStmt : public SwitchCase {
   enum { LHS, RHS, SUBSTMT, END_EXPR };
   Stmt* SubExprs[END_EXPR];  // The expression for the RHS is Non-null for
                              // GNU "case 1 ... 4" extension
-  SourceLocation CaseLoc;
   SourceLocation EllipsisLoc;
-  SourceLocation ColonLoc;
 public:
   CaseStmt(Expr *lhs, Expr *rhs, SourceLocation caseLoc,
            SourceLocation ellipsisLoc, SourceLocation colonLoc)
-    : SwitchCase(CaseStmtClass) {
+    : SwitchCase(CaseStmtClass, caseLoc, colonLoc) {
     SubExprs[SUBSTMT] = 0;
     SubExprs[LHS] = reinterpret_cast<Stmt*>(lhs);
     SubExprs[RHS] = reinterpret_cast<Stmt*>(rhs);
-    CaseLoc = caseLoc;
     EllipsisLoc = ellipsisLoc;
-    ColonLoc = colonLoc;
   }
 
   /// \brief Build an empty switch case statement.
-  explicit CaseStmt(EmptyShell Empty) : SwitchCase(CaseStmtClass) { }
+  explicit CaseStmt(EmptyShell Empty) : SwitchCase(CaseStmtClass, Empty) { }
 
-  SourceLocation getCaseLoc() const { return CaseLoc; }
-  void setCaseLoc(SourceLocation L) { CaseLoc = L; }
+  SourceLocation getCaseLoc() const { return KeywordLoc; }
+  void setCaseLoc(SourceLocation L) { KeywordLoc = L; }
   SourceLocation getEllipsisLoc() const { return EllipsisLoc; }
   void setEllipsisLoc(SourceLocation L) { EllipsisLoc = L; }
   SourceLocation getColonLoc() const { return ColonLoc; }
@@ -695,15 +707,16 @@ public:
   void setLHS(Expr *Val) { SubExprs[LHS] = reinterpret_cast<Stmt*>(Val); }
   void setRHS(Expr *Val) { SubExprs[RHS] = reinterpret_cast<Stmt*>(Val); }
 
-
-  SourceRange getSourceRange() const LLVM_READONLY {
+  SourceLocation getLocStart() const LLVM_READONLY { return KeywordLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY {
     // Handle deeply nested case statements with iteration instead of recursion.
     const CaseStmt *CS = this;
     while (const CaseStmt *CS2 = dyn_cast<CaseStmt>(CS->getSubStmt()))
       CS = CS2;
 
-    return SourceRange(CaseLoc, CS->getSubStmt()->getLocEnd());
+    return CS->getSubStmt()->getLocEnd();
   }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == CaseStmtClass;
   }
@@ -716,28 +729,26 @@ public:
 
 class DefaultStmt : public SwitchCase {
   Stmt* SubStmt;
-  SourceLocation DefaultLoc;
-  SourceLocation ColonLoc;
 public:
   DefaultStmt(SourceLocation DL, SourceLocation CL, Stmt *substmt) :
-    SwitchCase(DefaultStmtClass), SubStmt(substmt), DefaultLoc(DL),
-    ColonLoc(CL) {}
+    SwitchCase(DefaultStmtClass, DL, CL), SubStmt(substmt) {}
 
   /// \brief Build an empty default statement.
-  explicit DefaultStmt(EmptyShell) : SwitchCase(DefaultStmtClass) { }
+  explicit DefaultStmt(EmptyShell Empty)
+    : SwitchCase(DefaultStmtClass, Empty) { }
 
   Stmt *getSubStmt() { return SubStmt; }
   const Stmt *getSubStmt() const { return SubStmt; }
   void setSubStmt(Stmt *S) { SubStmt = S; }
 
-  SourceLocation getDefaultLoc() const { return DefaultLoc; }
-  void setDefaultLoc(SourceLocation L) { DefaultLoc = L; }
+  SourceLocation getDefaultLoc() const { return KeywordLoc; }
+  void setDefaultLoc(SourceLocation L) { KeywordLoc = L; }
   SourceLocation getColonLoc() const { return ColonLoc; }
   void setColonLoc(SourceLocation L) { ColonLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(DefaultLoc, SubStmt->getLocEnd());
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return KeywordLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return SubStmt->getLocEnd();}
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == DefaultStmtClass;
   }
@@ -746,6 +757,11 @@ public:
   child_range children() { return child_range(&SubStmt, &SubStmt+1); }
 };
 
+inline SourceLocation SwitchCase::getLocEnd() const {
+  if (const CaseStmt *CS = dyn_cast<CaseStmt>(this))
+    return CS->getLocEnd();
+  return cast<DefaultStmt>(this)->getLocEnd();
+}
 
 /// LabelStmt - Represents a label, which has a substatement.  For example:
 ///    foo: return;
@@ -771,9 +787,9 @@ public:
   void setIdentLoc(SourceLocation L) { IdentLoc = L; }
   void setSubStmt(Stmt *SS) { SubStmt = SS; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(IdentLoc, SubStmt->getLocEnd());
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return IdentLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return SubStmt->getLocEnd();}
+
   child_range children() { return child_range(&SubStmt, &SubStmt+1); }
 
   static bool classof(const Stmt *T) {
@@ -819,9 +835,9 @@ public:
   Stmt *getSubStmt() { return SubStmt; }
   const Stmt *getSubStmt() const { return SubStmt; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(AttrLoc, SubStmt->getLocEnd());
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return AttrLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return SubStmt->getLocEnd();}
+
   child_range children() { return child_range(&SubStmt, &SubStmt + 1); }
 
   static bool classof(const Stmt *T) {
@@ -879,11 +895,12 @@ public:
   SourceLocation getElseLoc() const { return ElseLoc; }
   void setElseLoc(SourceLocation L) { ElseLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
+  SourceLocation getLocStart() const LLVM_READONLY { return IfLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY {
     if (SubExprs[ELSE])
-      return SourceRange(IfLoc, SubExprs[ELSE]->getLocEnd());
+      return SubExprs[ELSE]->getLocEnd();
     else
-      return SourceRange(IfLoc, SubExprs[THEN]->getLocEnd());
+      return SubExprs[THEN]->getLocEnd();
   }
 
   // Iterators over subexpressions.  The iterators will include iterating
@@ -977,9 +994,11 @@ public:
     return (bool) AllEnumCasesCovered;
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(SwitchLoc, SubExprs[BODY]->getLocEnd());
+  SourceLocation getLocStart() const LLVM_READONLY { return SwitchLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return SubExprs[BODY]->getLocEnd();
   }
+
   // Iterators
   child_range children() {
     return child_range(&SubExprs[0], &SubExprs[0]+END_EXPR);
@@ -1031,9 +1050,11 @@ public:
   SourceLocation getWhileLoc() const { return WhileLoc; }
   void setWhileLoc(SourceLocation L) { WhileLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(WhileLoc, SubExprs[BODY]->getLocEnd());
+  SourceLocation getLocStart() const LLVM_READONLY { return WhileLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return SubExprs[BODY]->getLocEnd();
   }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == WhileStmtClass;
   }
@@ -1079,9 +1100,9 @@ public:
   SourceLocation getRParenLoc() const { return RParenLoc; }
   void setRParenLoc(SourceLocation L) { RParenLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(DoLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return DoLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == DoStmtClass;
   }
@@ -1150,9 +1171,11 @@ public:
   SourceLocation getRParenLoc() const { return RParenLoc; }
   void setRParenLoc(SourceLocation L) { RParenLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(ForLoc, SubExprs[BODY]->getLocEnd());
+  SourceLocation getLocStart() const LLVM_READONLY { return ForLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return SubExprs[BODY]->getLocEnd();
   }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ForStmtClass;
   }
@@ -1184,9 +1207,9 @@ public:
   SourceLocation getLabelLoc() const { return LabelLoc; }
   void setLabelLoc(SourceLocation L) { LabelLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(GotoLoc, LabelLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return GotoLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return LabelLoc; }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == GotoStmtClass;
   }
@@ -1227,9 +1250,8 @@ public:
     return const_cast<IndirectGotoStmt*>(this)->getConstantTarget();
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(GotoLoc, Target->getLocEnd());
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return GotoLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Target->getLocEnd(); }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == IndirectGotoStmtClass;
@@ -1253,9 +1275,8 @@ public:
   SourceLocation getContinueLoc() const { return ContinueLoc; }
   void setContinueLoc(SourceLocation L) { ContinueLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(ContinueLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return ContinueLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return ContinueLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ContinueStmtClass;
@@ -1278,7 +1299,8 @@ public:
   SourceLocation getBreakLoc() const { return BreakLoc; }
   void setBreakLoc(SourceLocation L) { BreakLoc = L; }
 
-  SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(BreakLoc); }
+  SourceLocation getLocStart() const LLVM_READONLY { return BreakLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return BreakLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == BreakStmtClass;
@@ -1329,7 +1351,10 @@ public:
   const VarDecl *getNRVOCandidate() const { return NRVOCandidate; }
   void setNRVOCandidate(const VarDecl *Var) { NRVOCandidate = Var; }
 
-  SourceRange getSourceRange() const LLVM_READONLY;
+  SourceLocation getLocStart() const LLVM_READONLY { return RetLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return RetExpr ? RetExpr->getLocEnd() : RetLoc;
+  }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ReturnStmtClass;
@@ -1381,7 +1406,8 @@ public:
   bool isVolatile() const { return IsVolatile; }
   void setVolatile(bool V) { IsVolatile = V; }
 
-  SourceRange getSourceRange() const LLVM_READONLY { return SourceRange(); }
+  SourceLocation getLocStart() const LLVM_READONLY { return SourceLocation(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return SourceLocation(); }
 
   //===--- Asm String Analysis ---===//
 
@@ -1636,9 +1662,8 @@ public:
     return Clobbers[i];
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(AsmLoc, RParenLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return AsmLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return RParenLoc; }
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == GCCAsmStmtClass;
@@ -1648,7 +1673,7 @@ public:
 /// This represents a Microsoft inline-assembly statement extension.
 ///
 class MSAsmStmt : public AsmStmt {
-  SourceLocation AsmLoc, LBraceLoc, EndLoc;
+  SourceLocation LBraceLoc, EndLoc;
   std::string AsmStr;
 
   unsigned NumAsmToks;
@@ -1717,9 +1742,9 @@ public:
 
   StringRef getClobber(unsigned i) const { return Clobbers[i]; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(AsmLoc, EndLoc);
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return AsmLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return EndLoc; }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == MSAsmStmtClass;
   }
@@ -1748,9 +1773,9 @@ public:
                                SourceLocation ExceptLoc,
                                Expr *FilterExpr,
                                Stmt *Block);
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(getExceptLoc(), getEndLoc());
-  }
+
+  SourceLocation getLocStart() const LLVM_READONLY { return getExceptLoc(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return getEndLoc(); }
 
   SourceLocation getExceptLoc() const { return Loc; }
   SourceLocation getEndLoc() const { return getBlock()->getLocEnd(); }
@@ -1760,7 +1785,7 @@ public:
   }
 
   CompoundStmt *getBlock() const {
-    return llvm::cast<CompoundStmt>(Children[BLOCK]);
+    return cast<CompoundStmt>(Children[BLOCK]);
   }
 
   child_range children() {
@@ -1789,14 +1814,13 @@ public:
                                 SourceLocation FinallyLoc,
                                 Stmt *Block);
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(getFinallyLoc(), getEndLoc());
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return getFinallyLoc(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return getEndLoc(); }
 
   SourceLocation getFinallyLoc() const { return Loc; }
   SourceLocation getEndLoc() const { return Block->getLocEnd(); }
 
-  CompoundStmt *getBlock() const { return llvm::cast<CompoundStmt>(Block); }
+  CompoundStmt *getBlock() const { return cast<CompoundStmt>(Block); }
 
   child_range children() {
     return child_range(&Block,&Block+1);
@@ -1831,9 +1855,8 @@ public:
                             Stmt *TryBlock,
                             Stmt *Handler);
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(getTryLoc(), getEndLoc());
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return getTryLoc(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return getEndLoc(); }
 
   SourceLocation getTryLoc() const { return TryLoc; }
   SourceLocation getEndLoc() const { return Children[HANDLER]->getLocEnd(); }
@@ -1841,7 +1864,7 @@ public:
   bool getIsCXXTry() const { return IsCXXTry; }
 
   CompoundStmt* getTryBlock() const {
-    return llvm::cast<CompoundStmt>(Children[TRY]);
+    return cast<CompoundStmt>(Children[TRY]);
   }
 
   Stmt *getHandler() const { return Children[HANDLER]; }
diff --git a/include/clang/AST/StmtCXX.h b/include/clang/AST/StmtCXX.h
index f4e4dcd..0112bef 100644
--- a/include/clang/AST/StmtCXX.h
+++ b/include/clang/AST/StmtCXX.h
@@ -14,6 +14,9 @@
 #ifndef LLVM_CLANG_AST_STMTCXX_H
 #define LLVM_CLANG_AST_STMTCXX_H
 
+#include "clang/AST/DeclarationName.h"
+#include "clang/AST/Expr.h"
+#include "clang/AST/NestedNameSpecifier.h"
 #include "clang/AST/Stmt.h"
 #include "llvm/Support/Compiler.h"
 
@@ -38,8 +41,9 @@ public:
   CXXCatchStmt(EmptyShell Empty)
   : Stmt(CXXCatchStmtClass), ExceptionDecl(0), HandlerBlock(0) {}
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(CatchLoc, HandlerBlock->getLocEnd());
+  SourceLocation getLocStart() const LLVM_READONLY { return CatchLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return HandlerBlock->getLocEnd();
   }
 
   SourceLocation getCatchLoc() const { return CatchLoc; }
@@ -62,8 +66,7 @@ class CXXTryStmt : public Stmt {
   SourceLocation TryLoc;
   unsigned NumHandlers;
 
-  CXXTryStmt(SourceLocation tryLoc, Stmt *tryBlock, Stmt **handlers,
-             unsigned numHandlers);
+  CXXTryStmt(SourceLocation tryLoc, Stmt *tryBlock, ArrayRef<Stmt*> handlers);
 
   CXXTryStmt(EmptyShell Empty, unsigned numHandlers)
     : Stmt(CXXTryStmtClass), NumHandlers(numHandlers) { }
@@ -77,15 +80,13 @@ class CXXTryStmt : public Stmt {
 
 public:
   static CXXTryStmt *Create(ASTContext &C, SourceLocation tryLoc,
-                            Stmt *tryBlock, Stmt **handlers,
-                            unsigned numHandlers);
+                            Stmt *tryBlock, ArrayRef<Stmt*> handlers);
 
   static CXXTryStmt *Create(ASTContext &C, EmptyShell Empty,
                             unsigned numHandlers);
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(getTryLoc(), getEndLoc());
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return getTryLoc(); }
+  SourceLocation getLocEnd() const LLVM_READONLY { return getEndLoc(); }
 
   SourceLocation getTryLoc() const { return TryLoc; }
   SourceLocation getEndLoc() const {
@@ -93,18 +94,18 @@ public:
   }
 
   CompoundStmt *getTryBlock() {
-    return llvm::cast<CompoundStmt>(getStmts()[0]);
+    return cast<CompoundStmt>(getStmts()[0]);
   }
   const CompoundStmt *getTryBlock() const {
-    return llvm::cast<CompoundStmt>(getStmts()[0]);
+    return cast<CompoundStmt>(getStmts()[0]);
   }
 
   unsigned getNumHandlers() const { return NumHandlers; }
   CXXCatchStmt *getHandler(unsigned i) {
-    return llvm::cast<CXXCatchStmt>(getStmts()[i + 1]);
+    return cast<CXXCatchStmt>(getStmts()[i + 1]);
   }
   const CXXCatchStmt *getHandler(unsigned i) const {
-    return llvm::cast<CXXCatchStmt>(getStmts()[i + 1]);
+    return cast<CXXCatchStmt>(getStmts()[i + 1]);
   }
 
   static bool classof(const Stmt *T) {
@@ -188,9 +189,11 @@ public:
   SourceLocation getRParenLoc() const { return RParenLoc; }
   void setRParenLoc(SourceLocation Loc) { RParenLoc = Loc; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(ForLoc, SubExprs[BODY]->getLocEnd());
+  SourceLocation getLocStart() const LLVM_READONLY { return ForLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return SubExprs[BODY]->getLocEnd();
   }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == CXXForRangeStmtClass;
   }
@@ -272,9 +275,8 @@ public:
     return reinterpret_cast<CompoundStmt *>(SubStmt);
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(KeywordLoc, SubStmt->getLocEnd());
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return KeywordLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return SubStmt->getLocEnd();}
 
   child_range children() {
     return child_range(&SubStmt, &SubStmt+1);
diff --git a/include/clang/AST/StmtGraphTraits.h b/include/clang/AST/StmtGraphTraits.h
index 25d0152..a3e9e1e 100644
--- a/include/clang/AST/StmtGraphTraits.h
+++ b/include/clang/AST/StmtGraphTraits.h
@@ -16,8 +16,8 @@
 #define LLVM_CLANG_AST_STMT_GRAPHTRAITS_H
 
 #include "clang/AST/Stmt.h"
-#include "llvm/ADT/GraphTraits.h"
 #include "llvm/ADT/DepthFirstIterator.h"
+#include "llvm/ADT/GraphTraits.h"
 
 namespace llvm {
 
diff --git a/include/clang/AST/StmtObjC.h b/include/clang/AST/StmtObjC.h
index d7a73a7..e97c1a5 100644
--- a/include/clang/AST/StmtObjC.h
+++ b/include/clang/AST/StmtObjC.h
@@ -55,9 +55,11 @@ public:
   SourceLocation getRParenLoc() const { return RParenLoc; }
   void setRParenLoc(SourceLocation Loc) { RParenLoc = Loc; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(ForLoc, SubExprs[BODY]->getLocEnd());
+  SourceLocation getLocStart() const LLVM_READONLY { return ForLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return SubExprs[BODY]->getLocEnd();
   }
+
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ObjCForCollectionStmtClass;
   }
@@ -102,9 +104,8 @@ public:
   SourceLocation getRParenLoc() const { return RParenLoc; }
   void setRParenLoc(SourceLocation Loc) { RParenLoc = Loc; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(AtCatchLoc, Body->getLocEnd());
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return AtCatchLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return Body->getLocEnd(); }
 
   bool hasEllipsis() const { return getCatchParamDecl() == 0; }
 
@@ -131,8 +132,9 @@ public:
   Stmt *getFinallyBody() { return AtFinallyStmt; }
   void setFinallyBody(Stmt *S) { AtFinallyStmt = S; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(AtFinallyLoc, AtFinallyStmt->getLocEnd());
+  SourceLocation getLocStart() const LLVM_READONLY { return AtFinallyLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return AtFinallyStmt->getLocEnd();
   }
 
   SourceLocation getAtFinallyLoc() const { return AtFinallyLoc; }
@@ -236,7 +238,8 @@ public:
     getStmts()[1 + NumCatchStmts] = S; 
   }
 
-  SourceRange getSourceRange() const LLVM_READONLY;
+  SourceLocation getLocStart() const LLVM_READONLY { return AtTryLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY;
 
   static bool classof(const Stmt *T) {
     return T->getStmtClass() == ObjCAtTryStmtClass;
@@ -292,8 +295,9 @@ public:
   }
   void setSynchExpr(Stmt *S) { SubStmts[SYNC_EXPR] = S; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(AtSynchronizedLoc, getSynchBody()->getLocEnd());
+  SourceLocation getLocStart() const LLVM_READONLY { return AtSynchronizedLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return getSynchBody()->getLocEnd();
   }
 
   static bool classof(const Stmt *T) {
@@ -324,11 +328,9 @@ public:
   SourceLocation getThrowLoc() { return AtThrowLoc; }
   void setThrowLoc(SourceLocation Loc) { AtThrowLoc = Loc; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    if (Throw)
-      return SourceRange(AtThrowLoc, Throw->getLocEnd());
-    else
-      return SourceRange(AtThrowLoc);
+  SourceLocation getLocStart() const LLVM_READONLY { return AtThrowLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY {
+    return Throw ? Throw->getLocEnd() : AtThrowLoc;
   }
 
   static bool classof(const Stmt *T) {
@@ -355,9 +357,8 @@ public:
   Stmt *getSubStmt() { return SubStmt; }
   void setSubStmt(Stmt *S) { SubStmt = S; }
 
-  SourceRange getSourceRange() const LLVM_READONLY {
-    return SourceRange(AtLoc, SubStmt->getLocEnd());
-  }
+  SourceLocation getLocStart() const LLVM_READONLY { return AtLoc; }
+  SourceLocation getLocEnd() const LLVM_READONLY { return SubStmt->getLocEnd();}
 
   SourceLocation getAtLoc() const { return AtLoc; }
   void setAtLoc(SourceLocation Loc) { AtLoc = Loc; }
diff --git a/include/clang/AST/TemplateBase.h b/include/clang/AST/TemplateBase.h
index 1c0abde..70b934f 100644
--- a/include/clang/AST/TemplateBase.h
+++ b/include/clang/AST/TemplateBase.h
@@ -15,8 +15,8 @@
 #ifndef LLVM_CLANG_AST_TEMPLATEBASE_H
 #define LLVM_CLANG_AST_TEMPLATEBASE_H
 
-#include "clang/AST/Type.h"
 #include "clang/AST/TemplateName.h"
+#include "clang/AST/Type.h"
 #include "llvm/ADT/APSInt.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/Support/Compiler.h"
@@ -72,35 +72,39 @@ private:
   /// \brief The kind of template argument we're storing.
   unsigned Kind;
 
+  struct DA {
+    ValueDecl *D;
+    bool ForRefParam;
+  };
+  struct I {
+    // We store a decomposed APSInt with the data allocated by ASTContext if
+    // BitWidth > 64. The memory may be shared between multiple
+    // TemplateArgument instances.
+    union {
+      uint64_t VAL;          ///< Used to store the <= 64 bits integer value.
+      const uint64_t *pVal;  ///< Used to store the >64 bits integer value.
+    };
+    unsigned BitWidth : 31;
+    unsigned IsUnsigned : 1;
+    void *Type;
+  };
+  struct A {
+    const TemplateArgument *Args;
+    unsigned NumArgs;
+  };
+  struct TA {
+    void *Name;
+    unsigned NumExpansions;
+  };
   union {
+    struct DA DeclArg;
+    struct I Integer;
+    struct A Args;
+    struct TA TemplateArg;
     uintptr_t TypeOrValue;
-    struct {
-      ValueDecl *D;
-      bool ForRefParam;
-    } DeclArg;
-    struct {
-      // We store a decomposed APSInt with the data allocated by ASTContext if
-      // BitWidth > 64. The memory may be shared between multiple
-      // TemplateArgument instances.
-      union {
-        uint64_t VAL;          ///< Used to store the <= 64 bits integer value.
-        const uint64_t *pVal;  ///< Used to store the >64 bits integer value.
-      };
-      unsigned BitWidth : 31;
-      unsigned IsUnsigned : 1;
-      void *Type;
-    } Integer;
-    struct {
-      const TemplateArgument *Args;
-      unsigned NumArgs;
-    } Args;
-    struct {
-      void *Name;
-      unsigned NumExpansions;
-    } TemplateArg;
   };
 
-  TemplateArgument(TemplateName, bool); // DO NOT USE
+  TemplateArgument(TemplateName, bool) LLVM_DELETED_FUNCTION;
   
 public:
   /// \brief Construct an empty, invalid template argument.
@@ -158,7 +162,7 @@ public:
   ///
   /// \param NumExpansions The number of expansions that will be generated by
   /// instantiating
-  TemplateArgument(TemplateName Name, llvm::Optional<unsigned> NumExpansions)
+  TemplateArgument(TemplateName Name, Optional<unsigned> NumExpansions)
     : Kind(TemplateExpansion) 
   {
     TemplateArg.Name = Name.getAsVoidPointer();
@@ -261,7 +265,7 @@ public:
 
   /// \brief Retrieve the number of expansions that a template template argument
   /// expansion will produce, if known.
-  llvm::Optional<unsigned> getNumTemplateExpansions() const;
+  Optional<unsigned> getNumTemplateExpansions() const;
   
   /// \brief Retrieve the template argument as an integral value.
   // FIXME: Provide a way to read the integral data without copying the value.
@@ -317,6 +321,12 @@ public:
     return Args.NumArgs;
   }
 
+  /// \brief Return the array of arguments in this template argument pack.
+  llvm::ArrayRef<TemplateArgument> getPackAsArray() const {
+    assert(Kind == Pack);
+    return llvm::ArrayRef<TemplateArgument>(Args.Args, Args.NumArgs);
+  }
+
   /// \brief Determines whether two template arguments are superficially the
   /// same.
   bool structurallyEquals(const TemplateArgument &Other) const;
@@ -335,17 +345,20 @@ public:
 /// Location information for a TemplateArgument.
 struct TemplateArgumentLocInfo {
 private:
+
+  struct T {
+    // FIXME: We'd like to just use the qualifier in the TemplateName,
+    // but template arguments get canonicalized too quickly.
+    NestedNameSpecifier *Qualifier;
+    void *QualifierLocData;
+    unsigned TemplateNameLoc;
+    unsigned EllipsisLoc;
+  };
+
   union {
+    struct T Template;
     Expr *Expression;
     TypeSourceInfo *Declarator;
-    struct {
-      // FIXME: We'd like to just use the qualifier in the TemplateName,
-      // but template arguments get canonicalized too quickly.
-      NestedNameSpecifier *Qualifier;
-      void *QualifierLocData;
-      unsigned TemplateNameLoc;
-      unsigned EllipsisLoc;
-    } Template;
   };
 
 public:
@@ -490,7 +503,7 @@ public:
   /// \param NumExpansions Will be set to the number of expansions that will
   /// be generated from this pack expansion, if known a priori.
   TemplateArgumentLoc getPackExpansionPattern(SourceLocation &Ellipsis,
-                                        llvm::Optional<unsigned> &NumExpansions,
+                                              Optional<unsigned> &NumExpansions,
                                               ASTContext &Context) const;
 };
 
diff --git a/include/clang/AST/TemplateName.h b/include/clang/AST/TemplateName.h
index 7dc75b1..0b9d4c8 100644
--- a/include/clang/AST/TemplateName.h
+++ b/include/clang/AST/TemplateName.h
@@ -15,9 +15,9 @@
 #define LLVM_CLANG_AST_TEMPLATENAME_H
 
 #include "clang/Basic/LLVM.h"
+#include "clang/Basic/OperatorKinds.h"
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/PointerUnion.h"
-#include "clang/Basic/OperatorKinds.h"
 
 namespace clang {
   
@@ -46,16 +46,17 @@ protected:
     SubstTemplateTemplateParmPack
   };
 
-  union {
-    struct {
-      /// \brief A Kind.
-      unsigned Kind : 2;
-      
-      /// \brief The number of stored templates or template arguments,
-      /// depending on which subclass we have.
-      unsigned Size : 30;
-    } Bits;
+  struct BitsTag {
+    /// \brief A Kind.
+    unsigned Kind : 2;
     
+    /// \brief The number of stored templates or template arguments,
+    /// depending on which subclass we have.
+    unsigned Size : 30;
+  };
+
+  union {
+    struct BitsTag Bits;
     void *PointerAlignment;
   };
   
@@ -308,6 +309,9 @@ public:
   void print(raw_ostream &OS, const PrintingPolicy &Policy,
              bool SuppressNNS = false) const;
 
+  /// \brief Debugging aid that dumps the template name.
+  void dump(raw_ostream &OS) const;
+
   /// \brief Debugging aid that dumps the template name to standard
   /// error.
   void dump() const;
diff --git a/include/clang/AST/Type.h b/include/clang/AST/Type.h
index 6900a7d..23fa3e8 100644
--- a/include/clang/AST/Type.h
+++ b/include/clang/AST/Type.h
@@ -14,24 +14,24 @@
 #ifndef LLVM_CLANG_AST_TYPE_H
 #define LLVM_CLANG_AST_TYPE_H
 
+#include "clang/AST/NestedNameSpecifier.h"
+#include "clang/AST/TemplateName.h"
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/ExceptionSpecificationType.h"
 #include "clang/Basic/IdentifierTable.h"
+#include "clang/Basic/LLVM.h"
 #include "clang/Basic/Linkage.h"
 #include "clang/Basic/PartialDiagnostic.h"
-#include "clang/Basic/Visibility.h"
 #include "clang/Basic/Specifiers.h"
-#include "clang/AST/NestedNameSpecifier.h"
-#include "clang/AST/TemplateName.h"
-#include "llvm/Support/type_traits.h"
-#include "llvm/Support/ErrorHandling.h"
+#include "clang/Basic/Visibility.h"
 #include "llvm/ADT/APSInt.h"
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/PointerIntPair.h"
 #include "llvm/ADT/PointerUnion.h"
 #include "llvm/ADT/Twine.h"
-#include "clang/Basic/LLVM.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/type_traits.h"
 
 namespace clang {
   enum {
@@ -784,8 +784,8 @@ public:
   /// Executing \c getUnqualifiedType() on the type \c DifferenceType will
   /// desugar until we hit the type \c Integer, which has no qualifiers on it.
   ///
-  /// The resulting type might still be qualified if it's an array
-  /// type.  To strip qualifiers even from within an array type, use
+  /// The resulting type might still be qualified if it's sugar for an array
+  /// type.  To strip qualifiers even from within a sugared array type, use
   /// ASTContext::getUnqualifiedArrayType.
   inline QualType getUnqualifiedType() const;
 
@@ -795,8 +795,8 @@ public:
   /// Like getUnqualifiedType(), but also returns the set of
   /// qualifiers that were built up.
   ///
-  /// The resulting type might still be qualified if it's an array
-  /// type.  To strip qualifiers even from within an array type, use
+  /// The resulting type might still be qualified if it's sugar for an array
+  /// type.  To strip qualifiers even from within a sugared array type, use
   /// ASTContext::getUnqualifiedArrayType.
   inline SplitQualType getSplitUnqualifiedType() const;
 
@@ -979,10 +979,6 @@ public:
   ///   type other than void.
   bool isCForbiddenLValueType() const;
 
-  /// \brief Determine whether this type has trivial copy/move-assignment
-  ///        semantics.
-  bool hasTrivialAssignment(ASTContext &Context, bool Copying) const;
-
 private:
   // These methods are implemented in a separate translation unit;
   // "static"-ize them to avoid creating temporary QualTypes in the
@@ -1002,14 +998,12 @@ private:
 namespace llvm {
 /// Implement simplify_type for QualType, so that we can dyn_cast from QualType
 /// to a specific Type class.
-template<> struct simplify_type<const ::clang::QualType> {
+template<> struct simplify_type< ::clang::QualType> {
   typedef const ::clang::Type *SimpleType;
-  static SimpleType getSimplifiedValue(const ::clang::QualType &Val) {
+  static SimpleType getSimplifiedValue(::clang::QualType Val) {
     return Val.getTypePtr();
   }
 };
-template<> struct simplify_type< ::clang::QualType>
-  : public simplify_type<const ::clang::QualType> {};
 
 // Teach SmallPtrSet that QualType is "basically a pointer".
 template<>
@@ -1195,13 +1189,9 @@ private:
     /// (for C++0x variadic templates).
     unsigned ContainsUnexpandedParameterPack : 1;
 
-    /// \brief Nonzero if the cache (i.e. the bitfields here starting
-    /// with 'Cache') is valid.  If so, then this is a
-    /// LangOptions::VisibilityMode+1.
-    mutable unsigned CacheValidAndVisibility : 2;
-
-    /// \brief True if the visibility was set explicitly in the source code.
-    mutable unsigned CachedExplicitVisibility : 1;
+    /// \brief True if the cache (i.e. the bitfields here starting with
+    /// 'Cache') is valid.
+    mutable unsigned CacheValid : 1;
 
     /// \brief Linkage of this type.
     mutable unsigned CachedLinkage : 2;
@@ -1213,15 +1203,7 @@ private:
     mutable unsigned FromAST : 1;
 
     bool isCacheValid() const {
-      return (CacheValidAndVisibility != 0);
-    }
-    Visibility getVisibility() const {
-      assert(isCacheValid() && "getting linkage from invalid cache");
-      return static_cast<Visibility>(CacheValidAndVisibility-1);
-    }
-    bool isVisibilityExplicit() const {
-      assert(isCacheValid() && "getting linkage from invalid cache");
-      return CachedExplicitVisibility;
+      return CacheValid;
     }
     Linkage getLinkage() const {
       assert(isCacheValid() && "getting linkage from invalid cache");
@@ -1278,11 +1260,6 @@ protected:
     /// C++ 8.3.5p4: The return type, the parameter type list and the
     /// cv-qualifier-seq, [...], are part of the function type.
     unsigned TypeQuals : 3;
-
-    /// \brief The ref-qualifier associated with a \c FunctionProtoType.
-    ///
-    /// This is a value of type \c RefQualifierKind.
-    unsigned RefQualifier : 2;
   };
 
   class ObjCObjectTypeBitfields {
@@ -1382,8 +1359,7 @@ protected:
     TypeBits.InstantiationDependent = Dependent || InstantiationDependent;
     TypeBits.VariablyModified = VariablyModified;
     TypeBits.ContainsUnexpandedParameterPack = ContainsUnexpandedParameterPack;
-    TypeBits.CacheValidAndVisibility = 0;
-    TypeBits.CachedExplicitVisibility = false;
+    TypeBits.CacheValid = false;
     TypeBits.CachedLocalOrUnnamed = false;
     TypeBits.CachedLinkage = NoLinkage;
     TypeBits.FromAST = false;
@@ -1584,6 +1560,20 @@ public:
   bool isNullPtrType() const;                   // C++0x nullptr_t
   bool isAtomicType() const;                    // C11 _Atomic()
 
+  bool isImage1dT() const;                      // OpenCL image1d_t
+  bool isImage1dArrayT() const;                 // OpenCL image1d_array_t
+  bool isImage1dBufferT() const;                // OpenCL image1d_buffer_t
+  bool isImage2dT() const;                      // OpenCL image2d_t
+  bool isImage2dArrayT() const;                 // OpenCL image2d_array_t
+  bool isImage3dT() const;                      // OpenCL image3d_t
+
+  bool isImageType() const;                     // Any OpenCL image type
+
+  bool isSamplerT() const;                      // OpenCL sampler_t
+  bool isEventT() const;                        // OpenCL event_t
+
+  bool isOpenCLSpecificType() const;            // Any OpenCL specific type
+
   /// Determines if this type, which must satisfy
   /// isObjCLifetimeType(), is implicitly __unsafe_unretained rather
   /// than implicitly __strong.
@@ -1770,16 +1760,21 @@ public:
   Linkage getLinkage() const;
 
   /// \brief Determine the visibility of this type.
-  Visibility getVisibility() const;
+  Visibility getVisibility() const {
+    return getLinkageAndVisibility().getVisibility();
+  }
 
   /// \brief Return true if the visibility was explicitly set is the code.
-  bool isVisibilityExplicit() const;
+  bool isVisibilityExplicit() const {
+    return getLinkageAndVisibility().isVisibilityExplicit();
+  }
 
   /// \brief Determine the linkage and visibility of this type.
-  std::pair<Linkage,Visibility> getLinkageAndVisibility() const;
+  LinkageInfo getLinkageAndVisibility() const;
 
-  /// \brief Note that the linkage is no longer known.
-  void ClearLinkageCache();
+  /// \brief True if the computed linkage is valid. Used for consistency
+  /// checking. Should always return true.
+  bool isLinkageValid() const;
 
   const char *getTypeClassName() const;
 
@@ -2097,6 +2092,14 @@ public:
   }
 };
 
+/// The inheritance model to use for this member pointer.
+enum MSInheritanceModel {
+  MSIM_Single,
+  MSIM_Multiple,
+  MSIM_Virtual,
+  MSIM_Unspecified
+};
+
 /// MemberPointerType - C++ 8.3.3 - Pointers to members
 ///
 class MemberPointerType : public Type, public llvm::FoldingSetNode {
@@ -2132,6 +2135,10 @@ public:
     return !PointeeType->isFunctionProtoType();
   }
 
+  /// Returns the number of pointer and integer slots used to represent this
+  /// member pointer in the MS C++ ABI.
+  std::pair<unsigned, unsigned> getMSMemberPointerSlots() const;
+
   const Type *getClass() const { return Class; }
 
   bool isSugared() const { return false; }
@@ -2686,8 +2693,7 @@ class FunctionType : public Type {
 
 protected:
   FunctionType(TypeClass tc, QualType res,
-               unsigned typeQuals, RefQualifierKind RefQualifier,
-               QualType Canonical, bool Dependent,
+               unsigned typeQuals, QualType Canonical, bool Dependent,
                bool InstantiationDependent,
                bool VariablyModified, bool ContainsUnexpandedParameterPack,
                ExtInfo Info)
@@ -2696,20 +2702,18 @@ protected:
       ResultType(res) {
     FunctionTypeBits.ExtInfo = Info.Bits;
     FunctionTypeBits.TypeQuals = typeQuals;
-    FunctionTypeBits.RefQualifier = static_cast<unsigned>(RefQualifier);
   }
   unsigned getTypeQuals() const { return FunctionTypeBits.TypeQuals; }
 
-  RefQualifierKind getRefQualifier() const {
-    return static_cast<RefQualifierKind>(FunctionTypeBits.RefQualifier);
-  }
-
 public:
 
   QualType getResultType() const { return ResultType; }
 
   bool getHasRegParm() const { return getExtInfo().getHasRegParm(); }
   unsigned getRegParmType() const { return getExtInfo().getRegParm(); }
+  /// \brief Determine whether this function type includes the GNU noreturn
+  /// attribute. The C++11 [[noreturn]] attribute does not affect the function
+  /// type.
   bool getNoReturnAttr() const { return getExtInfo().getNoReturn(); }
   CallingConv getCallConv() const { return getExtInfo().getCC(); }
   ExtInfo getExtInfo() const { return ExtInfo(FunctionTypeBits.ExtInfo); }
@@ -2735,7 +2739,7 @@ public:
 /// no information available about its arguments.
 class FunctionNoProtoType : public FunctionType, public llvm::FoldingSetNode {
   FunctionNoProtoType(QualType Result, QualType Canonical, ExtInfo Info)
-    : FunctionType(FunctionNoProto, Result, 0, RQ_None, Canonical,
+    : FunctionType(FunctionNoProto, Result, 0, Canonical,
                    /*Dependent=*/false, /*InstantiationDependent=*/false,
                    Result->isVariablyModifiedType(),
                    /*ContainsUnexpandedParameterPack=*/false, Info) {}
@@ -2804,11 +2808,11 @@ private:
     return false;
   }
 
-  FunctionProtoType(QualType result, const QualType *args, unsigned numArgs,
+  FunctionProtoType(QualType result, ArrayRef<QualType> args,
                     QualType canonical, const ExtProtoInfo &epi);
 
   /// NumArgs - The number of arguments this function has, not counting '...'.
-  unsigned NumArgs : 17;
+  unsigned NumArgs : 15;
 
   /// NumExceptions - The number of types in the exception spec, if any.
   unsigned NumExceptions : 9;
@@ -2825,6 +2829,11 @@ private:
   /// HasTrailingReturn - Whether this function has a trailing return type.
   unsigned HasTrailingReturn : 1;
 
+  /// \brief The ref-qualifier associated with a \c FunctionProtoType.
+  ///
+  /// This is a value of type \c RefQualifierKind.
+  unsigned RefQualifier : 2;
+
   // ArgInfo - There is an variable size array after the class in memory that
   // holds the argument types.
 
@@ -2864,6 +2873,9 @@ public:
     assert(i < NumArgs && "Invalid argument number!");
     return arg_type_begin()[i];
   }
+  ArrayRef<QualType> getArgTypes() const {
+    return ArrayRef<QualType>(arg_type_begin(), arg_type_end());
+  }
 
   ExtProtoInfo getExtProtoInfo() const {
     ExtProtoInfo EPI;
@@ -2972,7 +2984,7 @@ public:
 
   /// \brief Retrieve the ref-qualifier associated with this function type.
   RefQualifierKind getRefQualifier() const {
-    return FunctionType::getRefQualifier();
+    return static_cast<RefQualifierKind>(RefQualifier);
   }
 
   typedef const QualType *arg_type_iterator;
@@ -3005,9 +3017,6 @@ public:
   bool isSugared() const { return false; }
   QualType desugar() const { return QualType(this, 0); }
 
-  // FIXME: Remove the string version.
-  void printExceptionSpecification(std::string &S, 
-                                   const PrintingPolicy &Policy) const;
   void printExceptionSpecification(raw_ostream &OS, 
                                    const PrintingPolicy &Policy) const;
 
@@ -3323,7 +3332,8 @@ public:
     attr_stdcall,
     attr_thiscall,
     attr_pascal,
-    attr_pnaclcall
+    attr_pnaclcall,
+    attr_inteloclbicc
   };
 
 private:
@@ -3648,21 +3658,6 @@ public:
 
   /// \brief Print a template argument list, including the '<' and '>'
   /// enclosing the template arguments.
-  // FIXME: remove the string ones.
-  static std::string PrintTemplateArgumentList(const TemplateArgument *Args,
-                                               unsigned NumArgs,
-                                               const PrintingPolicy &Policy,
-                                               bool SkipBrackets = false);
-
-  static std::string PrintTemplateArgumentList(const TemplateArgumentLoc *Args,
-                                               unsigned NumArgs,
-                                               const PrintingPolicy &Policy);
-
-  static std::string PrintTemplateArgumentList(const TemplateArgumentListInfo &,
-                                               const PrintingPolicy &Policy);
-
-  /// \brief Print a template argument list, including the '<' and '>'
-  /// enclosing the template arguments.
   static void PrintTemplateArgumentList(raw_ostream &OS,
                                         const TemplateArgument *Args,
                                         unsigned NumArgs,
@@ -4125,7 +4120,7 @@ class PackExpansionType : public Type, public llvm::FoldingSetNode {
   unsigned NumExpansions;
 
   PackExpansionType(QualType Pattern, QualType Canon,
-                    llvm::Optional<unsigned> NumExpansions)
+                    Optional<unsigned> NumExpansions)
     : Type(PackExpansion, Canon, /*Dependent=*/Pattern->isDependentType(),
            /*InstantiationDependent=*/true,
            /*VariableModified=*/Pattern->isVariablyModifiedType(),
@@ -4143,11 +4138,11 @@ public:
 
   /// \brief Retrieve the number of expansions that this pack expansion will
   /// generate, if known.
-  llvm::Optional<unsigned> getNumExpansions() const {
+  Optional<unsigned> getNumExpansions() const {
     if (NumExpansions)
       return NumExpansions - 1;
 
-    return llvm::Optional<unsigned>();
+    return None;
   }
 
   bool isSugared() const { return false; }
@@ -4158,9 +4153,9 @@ public:
   }
 
   static void Profile(llvm::FoldingSetNodeID &ID, QualType Pattern,
-                      llvm::Optional<unsigned> NumExpansions) {
+                      Optional<unsigned> NumExpansions) {
     ID.AddPointer(Pattern.getAsOpaquePtr());
-    ID.AddBoolean(NumExpansions);
+    ID.AddBoolean(NumExpansions.hasValue());
     if (NumExpansions)
       ID.AddInteger(*NumExpansions);
   }
@@ -4887,6 +4882,49 @@ inline bool Type::isObjCSelType() const {
 inline bool Type::isObjCBuiltinType() const {
   return isObjCIdType() || isObjCClassType() || isObjCSelType();
 }
+
+inline bool Type::isImage1dT() const {
+  return isSpecificBuiltinType(BuiltinType::OCLImage1d);
+}
+
+inline bool Type::isImage1dArrayT() const {
+  return isSpecificBuiltinType(BuiltinType::OCLImage1dArray);
+}
+
+inline bool Type::isImage1dBufferT() const {
+  return isSpecificBuiltinType(BuiltinType::OCLImage1dBuffer);
+}
+
+inline bool Type::isImage2dT() const {
+  return isSpecificBuiltinType(BuiltinType::OCLImage2d);
+}
+
+inline bool Type::isImage2dArrayT() const {
+  return isSpecificBuiltinType(BuiltinType::OCLImage2dArray);
+}
+
+inline bool Type::isImage3dT() const {
+  return isSpecificBuiltinType(BuiltinType::OCLImage3d);
+}
+
+inline bool Type::isSamplerT() const {
+  return isSpecificBuiltinType(BuiltinType::OCLSampler);
+}
+
+inline bool Type::isEventT() const {
+  return isSpecificBuiltinType(BuiltinType::OCLEvent);
+}
+
+inline bool Type::isImageType() const {
+  return isImage3dT() ||
+         isImage2dT() || isImage2dArrayT() ||
+         isImage1dT() || isImage1dArrayT() || isImage1dBufferT();
+}
+
+inline bool Type::isOpenCLSpecificType() const {
+  return isSamplerT() || isEventT() || isImageType();
+}
+
 inline bool Type::isTemplateTypeParmType() const {
   return isa<TemplateTypeParmType>(CanonicalType);
 }
diff --git a/include/clang/AST/TypeLoc.h b/include/clang/AST/TypeLoc.h
index 8a04bd8..11cad9b 100644
--- a/include/clang/AST/TypeLoc.h
+++ b/include/clang/AST/TypeLoc.h
@@ -14,9 +14,9 @@
 #ifndef LLVM_CLANG_AST_TYPELOC_H
 #define LLVM_CLANG_AST_TYPELOC_H
 
-#include "clang/AST/Type.h"
 #include "clang/AST/Decl.h"
 #include "clang/AST/TemplateBase.h"
+#include "clang/AST/Type.h"
 #include "clang/Basic/Specifiers.h"
 #include "llvm/Support/Compiler.h"
 
@@ -44,6 +44,29 @@ protected:
   void *Data;
 
 public:
+  /// \brief Convert to the specified TypeLoc type, asserting that this TypeLoc
+  /// is of the desired type.
+  template<typename T>
+  T castAs() const {
+    assert(T::isKind(*this));
+    T t;
+    TypeLoc& tl = t;
+    tl = *this;
+    return t;
+  }
+
+  /// \brief Convert to the specified TypeLoc type, returning a null TypeLoc if
+  /// this TypeLoc is not of the desired type.
+  template<typename T>
+  T getAs() const {
+    if (!T::isKind(*this))
+      return T();
+    T t;
+    TypeLoc& tl = t;
+    tl = *this;
+    return t;
+  }
+
   /// The kinds of TypeLocs.  Equivalent to the Type::TypeClass enum,
   /// except it also defines a Qualified enum that corresponds to the
   /// QualifiedLoc class.
@@ -119,11 +142,7 @@ public:
   /// \brief Skips past any qualifiers, if this is qualified.
   UnqualTypeLoc getUnqualifiedLoc() const; // implemented in this header
 
-  TypeLoc IgnoreParens() const {
-    if (isa<ParenTypeLoc>(this))
-      return IgnoreParensImpl(*this);
-    return *this;
-  }
+  TypeLoc IgnoreParens() const;
 
   /// \brief Initializes this to state that every location in this
   /// type is the given location.
@@ -160,6 +179,10 @@ public:
   }
 
 private:
+  static bool isKind(const TypeLoc&) {
+    return true;
+  }
+
   static void initializeImpl(ASTContext &Context, TypeLoc TL,
                              SourceLocation Loc);
   static TypeLoc getNextTypeLocImpl(TypeLoc TL);
@@ -187,8 +210,10 @@ public:
     return (TypeLocClass) getTypePtr()->getTypeClass();
   }
 
-  static bool classof(const TypeLoc *TL) {
-    return !TL->getType().hasLocalQualifiers();
+private:
+  friend class TypeLoc;
+  static bool isKind(const TypeLoc &TL) {
+    return !TL.getType().hasLocalQualifiers();
   }
 };
 
@@ -231,15 +256,17 @@ public:
       getFullDataSizeForType(getType().getLocalUnqualifiedType());
   }
 
-  static bool classof(const TypeLoc *TL) {
-    return TL->getType().hasLocalQualifiers();
+private:
+  friend class TypeLoc;
+  static bool isKind(const TypeLoc &TL) {
+    return TL.getType().hasLocalQualifiers();
   }
 };
 
 inline UnqualTypeLoc TypeLoc::getUnqualifiedLoc() const {
-  if (isa<QualifiedTypeLoc>(this))
-    return cast<QualifiedTypeLoc>(this)->getUnqualifiedLoc();
-  return cast<UnqualTypeLoc>(*this);
+  if (QualifiedTypeLoc Loc = getAs<QualifiedTypeLoc>())
+    return Loc.getUnqualifiedLoc();
+  return castAs<UnqualTypeLoc>();
 }
 
 /// A metaprogramming base class for TypeLoc classes which correspond
@@ -280,24 +307,22 @@ class ConcreteTypeLoc : public Base {
     return static_cast<const Derived*>(this);
   }
 
-public:
-  unsigned getLocalDataSize() const {
-    return sizeof(LocalData) + asDerived()->getExtraLocalDataSize();
-  }
-  // Give a default implementation that's useful for leaf types.
-  unsigned getFullDataSize() const {
-    return asDerived()->getLocalDataSize() + getInnerTypeSize();
+  friend class TypeLoc;
+  static bool isKind(const TypeLoc &TL) {
+    return Derived::classofType(TL.getTypePtr());
   }
 
   static bool classofType(const Type *Ty) {
     return TypeClass::classof(Ty);
   }
 
-  static bool classof(const TypeLoc *TL) {
-    return Derived::classofType(TL->getTypePtr());
+public:
+  unsigned getLocalDataSize() const {
+    return sizeof(LocalData) + asDerived()->getExtraLocalDataSize();
   }
-  static bool classof(const UnqualTypeLoc *TL) {
-    return Derived::classofType(TL->getTypePtr());
+  // Give a default implementation that's useful for leaf types.
+  unsigned getFullDataSize() const {
+    return asDerived()->getLocalDataSize() + getInnerTypeSize();
   }
 
   TypeLoc getNextTypeLoc() const {
@@ -362,18 +387,19 @@ private:
 /// information.  See the note on ConcreteTypeLoc.
 template <class Base, class Derived, class TypeClass>
 class InheritingConcreteTypeLoc : public Base {
-public:
+  friend class TypeLoc;
   static bool classofType(const Type *Ty) {
     return TypeClass::classof(Ty);
   }
 
-  static bool classof(const TypeLoc *TL) {
-    return Derived::classofType(TL->getTypePtr());
+  static bool isKind(const TypeLoc &TL) {
+    return Derived::classofType(TL.getTypePtr());
   }
-  static bool classof(const UnqualTypeLoc *TL) {
-    return Derived::classofType(TL->getTypePtr());
+  static bool isKind(const UnqualTypeLoc &TL) {
+    return Derived::classofType(TL.getTypePtr());
   }
 
+public:
   const TypeClass *getTypePtr() const {
     return cast<TypeClass>(Base::getTypePtr());
   }
@@ -406,7 +432,9 @@ public:
     setNameLoc(Loc);
   }
 
-  static bool classof(const TypeLoc *TL);
+private:
+  friend class TypeLoc;
+  static bool isKind(const TypeLoc &TL);
 };
 
 
@@ -899,6 +927,11 @@ public:
   }
 };
 
+inline TypeLoc TypeLoc::IgnoreParens() const {
+  if (ParenTypeLoc::isKind(*this))
+    return IgnoreParensImpl(*this);
+  return *this;
+}
 
 struct PointerLikeLocInfo {
   SourceLocation StarLoc;
diff --git a/include/clang/AST/TypeLocVisitor.h b/include/clang/AST/TypeLocVisitor.h
index 50fc439..db5775a 100644
--- a/include/clang/AST/TypeLocVisitor.h
+++ b/include/clang/AST/TypeLocVisitor.h
@@ -21,7 +21,7 @@ namespace clang {
 
 #define DISPATCH(CLASSNAME) \
   return static_cast<ImplClass*>(this)-> \
-    Visit##CLASSNAME(cast<CLASSNAME>(TyLoc))
+    Visit##CLASSNAME(TyLoc.castAs<CLASSNAME>())
 
 template<typename ImplClass, typename RetTy=void>
 class TypeLocVisitor {
diff --git a/include/clang/AST/TypeOrdering.h b/include/clang/AST/TypeOrdering.h
index 7cf0d5e..59b59f5 100644
--- a/include/clang/AST/TypeOrdering.h
+++ b/include/clang/AST/TypeOrdering.h
@@ -16,8 +16,8 @@
 #ifndef LLVM_CLANG_TYPE_ORDERING_H
 #define LLVM_CLANG_TYPE_ORDERING_H
 
-#include "clang/AST/Type.h"
 #include "clang/AST/CanonicalType.h"
+#include "clang/AST/Type.h"
 #include <functional>
 
 namespace clang {
diff --git a/include/clang/AST/UnresolvedSet.h b/include/clang/AST/UnresolvedSet.h
index 9f11ee5..d26065e 100644
--- a/include/clang/AST/UnresolvedSet.h
+++ b/include/clang/AST/UnresolvedSet.h
@@ -15,9 +15,11 @@
 #ifndef LLVM_CLANG_AST_UNRESOLVEDSET_H
 #define LLVM_CLANG_AST_UNRESOLVEDSET_H
 
-#include <iterator>
-#include "llvm/ADT/SmallVector.h"
 #include "clang/AST/DeclAccessPair.h"
+#include "clang/Basic/LLVM.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/SmallVector.h"
+#include <iterator>
 
 namespace clang {
 
@@ -25,12 +27,13 @@ namespace clang {
 /// non-const iterator.
 class UnresolvedSetIterator {
 private:
-  typedef SmallVectorImpl<DeclAccessPair> DeclsTy;
+  typedef llvm::MutableArrayRef<DeclAccessPair> DeclsTy;
   typedef DeclsTy::iterator IteratorTy;
 
   IteratorTy ir;
 
   friend class UnresolvedSetImpl;
+  friend class ASTUnresolvedSet;
   friend class OverloadExpr;
   explicit UnresolvedSetIterator(DeclsTy::iterator ir) : ir(ir) {}
   explicit UnresolvedSetIterator(DeclsTy::const_iterator ir) :
@@ -87,7 +90,7 @@ public:
 
 /// UnresolvedSet - A set of unresolved declarations.
 class UnresolvedSetImpl {
-  typedef UnresolvedSetIterator::DeclsTy DeclsTy;
+  typedef SmallVectorImpl<DeclAccessPair> DeclsTy;
 
   // Don't allow direct construction, and only permit subclassing by
   // UnresolvedSet.
diff --git a/include/clang/AST/VTTBuilder.h b/include/clang/AST/VTTBuilder.h
index 6756dd1..f24bb3f 100644
--- a/include/clang/AST/VTTBuilder.h
+++ b/include/clang/AST/VTTBuilder.h
@@ -102,9 +102,6 @@ class VTTBuilder {
   bool GenerateDefinition;
 
   /// AddVTablePointer - Add a vtable pointer to the VTT currently being built.
-  ///
-  /// \param AddressPoints - If the vtable is a construction vtable, this has
-  /// the address points for it.
   void AddVTablePointer(BaseSubobject Base, uint64_t VTableIndex,
                         const CXXRecordDecl *VTableClass);
                         
@@ -117,9 +114,6 @@ class VTTBuilder {
   ///
   /// \param BaseIsMorallyVirtual whether the base subobject is a virtual base
   /// or a direct or indirect base of a virtual base.
-  ///
-  /// \param AddressPoints - If the vtable is a construction vtable, this has
-  /// the address points for it.
   void LayoutSecondaryVirtualPointers(BaseSubobject Base, 
                                       bool BaseIsMorallyVirtual,
                                       uint64_t VTableIndex,
@@ -128,9 +122,6 @@ class VTTBuilder {
   
   /// LayoutSecondaryVirtualPointers - Lay out the secondary virtual pointers
   /// for the given base subobject.
-  ///
-  /// \param AddressPoints - If the vtable is a construction vtable, this has
-  /// the address points for it.
   void LayoutSecondaryVirtualPointers(BaseSubobject Base, 
                                       uint64_t VTableIndex);
 
diff --git a/include/clang/AST/VTableBuilder.h b/include/clang/AST/VTableBuilder.h
index a6aa40b..bcbe875 100644
--- a/include/clang/AST/VTableBuilder.h
+++ b/include/clang/AST/VTableBuilder.h
@@ -215,12 +215,15 @@ private:
   /// Address points - Address points for all vtables.
   AddressPointsMapTy AddressPoints;
 
+  bool IsMicrosoftABI;
+
 public:
   VTableLayout(uint64_t NumVTableComponents,
                const VTableComponent *VTableComponents,
                uint64_t NumVTableThunks,
                const VTableThunkTy *VTableThunks,
-               const AddressPointsMapTy &AddressPoints);
+               const AddressPointsMapTy &AddressPoints,
+               bool IsMicrosoftABI);
   ~VTableLayout();
 
   uint64_t getNumVTableComponents() const {
@@ -252,7 +255,8 @@ public:
            "Did not find address point!");
 
     uint64_t AddressPoint = AddressPoints.lookup(Base);
-    assert(AddressPoint && "Address point must not be zero!");
+    assert(AddressPoint != 0 || IsMicrosoftABI);
+    (void)IsMicrosoftABI;
 
     return AddressPoint;
   }
@@ -271,6 +275,8 @@ public:
   typedef SmallVector<ThunkInfo, 1> ThunkInfoVectorTy;
 
 private:
+  bool IsMicrosoftABI;
+
   /// MethodVTableIndices - Contains the index (relative to the vtable address
   /// point) where the function pointer for a virtual function is stored.
   typedef llvm::DenseMap<GlobalDecl, int64_t> MethodVTableIndicesTy;
@@ -306,10 +312,21 @@ private:
   /// given record decl.
   void ComputeVTableRelatedInformation(const CXXRecordDecl *RD);
 
+  /// ErrorUnsupported - Print out an error that the v-table layout code
+  /// doesn't support the particular C++ feature yet.
+  void ErrorUnsupported(StringRef Feature, SourceLocation Location);
+
 public:
-  VTableContext(ASTContext &Context) : Context(Context) {}
+  VTableContext(ASTContext &Context);
   ~VTableContext();
 
+  bool isMicrosoftABI() const {
+    // FIXME: Currently, this method is only used in the VTableContext and
+    // VTableBuilder code which is ABI-specific. Probably we can remove it
+    // when we add a layer of abstraction for vtable generation.
+    return IsMicrosoftABI;
+  }
+
   const VTableLayout &getVTableLayout(const CXXRecordDecl *RD) {
     ComputeVTableRelatedInformation(RD);
     assert(VTableLayouts.count(RD) && "No layout for this record decl!");
diff --git a/include/clang/ASTMatchers/ASTMatchFinder.h b/include/clang/ASTMatchers/ASTMatchFinder.h
index 30b4050..870a39b 100644
--- a/include/clang/ASTMatchers/ASTMatchFinder.h
+++ b/include/clang/ASTMatchers/ASTMatchFinder.h
@@ -56,6 +56,10 @@ namespace ast_matchers {
 /// that will trigger the callbacks specified via addMatcher(...) when a match
 /// is found.
 ///
+/// The order of matches is guaranteed to be equivalent to doing a pre-order
+/// traversal on the AST, and applying the matchers in the order in which they
+/// were added to the MatchFinder.
+///
 /// See ASTMatchers.h for more information about how to create matchers.
 ///
 /// Not intended to be subclassed.
@@ -130,11 +134,17 @@ public:
   /// \brief Creates a clang ASTConsumer that finds all matches.
   clang::ASTConsumer *newASTConsumer();
 
-  /// \brief Finds all matches on the given \c Node.
+  /// \brief Calls the registered callbacks on all matches on the given \p Node.
+  ///
+  /// Note that there can be multiple matches on a single node, for
+  /// example when using decl(forEachDescendant(stmt())).
   ///
   /// @{
-  void findAll(const Decl &Node, ASTContext &Context);
-  void findAll(const Stmt &Node, ASTContext &Context);
+  template <typename T> void match(const T &Node, ASTContext &Context) {
+    match(clang::ast_type_traits::DynTypedNode::create(Node), Context);
+  }
+  void match(const clang::ast_type_traits::DynTypedNode &Node,
+             ASTContext &Context);
   /// @}
 
   /// \brief Registers a callback to notify the end of parsing.
@@ -154,6 +164,75 @@ private:
   ParsingDoneTestCallback *ParsingDone;
 };
 
+/// \brief Returns the results of matching \p Matcher on \p Node.
+///
+/// Collects the \c BoundNodes of all callback invocations when matching
+/// \p Matcher on \p Node and returns the collected results.
+///
+/// Multiple results occur when using matchers like \c forEachDescendant,
+/// which generate a result for each sub-match.
+///
+/// \see selectFirst
+/// @{
+template <typename MatcherT, typename NodeT>
+SmallVector<BoundNodes, 1>
+match(MatcherT Matcher, const NodeT &Node, ASTContext &Context);
+
+template <typename MatcherT>
+SmallVector<BoundNodes, 1>
+match(MatcherT Matcher, const ast_type_traits::DynTypedNode &Node,
+      ASTContext &Context);
+/// @}
+
+/// \brief Returns the first result of type \c NodeT bound to \p BoundTo.
+///
+/// Returns \c NULL if there is no match, or if the matching node cannot be
+/// casted to \c NodeT.
+///
+/// This is useful in combanation with \c match():
+/// \code
+///   Decl *D = selectFirst<Decl>("id", match(Matcher.bind("id"),
+///                                           Node, Context));
+/// \endcode
+template <typename NodeT>
+NodeT *
+selectFirst(StringRef BoundTo, const SmallVectorImpl<BoundNodes> &Results) {
+  for (SmallVectorImpl<BoundNodes>::const_iterator I = Results.begin(),
+                                                   E = Results.end();
+       I != E; ++I) {
+    if (NodeT *Node = I->getNodeAs<NodeT>(BoundTo))
+      return Node;
+  }
+  return NULL;
+}
+
+namespace internal {
+class CollectMatchesCallback : public MatchFinder::MatchCallback {
+public:
+  virtual void run(const MatchFinder::MatchResult &Result) {
+    Nodes.push_back(Result.Nodes);
+  }
+  SmallVector<BoundNodes, 1> Nodes;
+};
+}
+
+template <typename MatcherT>
+SmallVector<BoundNodes, 1>
+match(MatcherT Matcher, const ast_type_traits::DynTypedNode &Node,
+      ASTContext &Context) {
+  internal::CollectMatchesCallback Callback;
+  MatchFinder Finder;
+  Finder.addMatcher(Matcher, &Callback);
+  Finder.match(Node, Context);
+  return Callback.Nodes;
+}
+
+template <typename MatcherT, typename NodeT>
+SmallVector<BoundNodes, 1>
+match(MatcherT Matcher, const NodeT &Node, ASTContext &Context) {
+  return match(Matcher, ast_type_traits::DynTypedNode::create(Node), Context);
+}
+
 } // end namespace ast_matchers
 } // end namespace clang
 
diff --git a/include/clang/ASTMatchers/ASTMatchers.h b/include/clang/ASTMatchers/ASTMatchers.h
index a70dd5c..f10addc 100644
--- a/include/clang/ASTMatchers/ASTMatchers.h
+++ b/include/clang/ASTMatchers/ASTMatchers.h
@@ -142,7 +142,7 @@ inline internal::PolymorphicMatcherWithParam0<internal::TrueMatcher> anything()
 ///     friend X;
 ///   };
 /// \endcode
-const internal::VariadicDynCastAllOfMatcher<Decl, Decl> decl;
+const internal::VariadicAllOfMatcher<Decl> decl;
 
 /// \brief Matches a declaration of anything that could have a name.
 ///
@@ -192,6 +192,69 @@ const internal::VariadicDynCastAllOfMatcher<
   Decl,
   ClassTemplateSpecializationDecl> classTemplateSpecializationDecl;
 
+/// \brief Matches C++ access specifier declarations.
+///
+/// Given
+/// \code
+///   class C {
+///   public:
+///     int a;
+///   };
+/// \endcode
+/// accessSpecDecl()
+///   matches 'public:'
+const internal::VariadicDynCastAllOfMatcher<
+  Decl,
+  AccessSpecDecl> accessSpecDecl;
+
+/// \brief Matches public C++ declarations.
+///
+/// Given
+/// \code
+///   class C {
+///   public:    int a;
+///   protected: int b;
+///   private:   int c;
+///   };
+/// \endcode
+/// fieldDecl(isPublic())
+///   matches 'int a;' 
+AST_MATCHER(Decl, isPublic) {
+  return Node.getAccess() == AS_public;
+}
+
+/// \brief Matches protected C++ declarations.
+///
+/// Given
+/// \code
+///   class C {
+///   public:    int a;
+///   protected: int b;
+///   private:   int c;
+///   };
+/// \endcode
+/// fieldDecl(isProtected())
+///   matches 'int b;' 
+AST_MATCHER(Decl, isProtected) {
+  return Node.getAccess() == AS_protected;
+}
+
+/// \brief Matches private C++ declarations.
+///
+/// Given
+/// \code
+///   class C {
+///   public:    int a;
+///   protected: int b;
+///   private:   int c;
+///   };
+/// \endcode
+/// fieldDecl(isPrivate())
+///   matches 'int c;' 
+AST_MATCHER(Decl, isPrivate) {
+  return Node.getAccess() == AS_private;
+}
+
 /// \brief Matches classTemplateSpecializations that have at least one
 /// TemplateArgument matching the given InnerMatcher.
 ///
@@ -453,7 +516,7 @@ const internal::VariadicDynCastAllOfMatcher<
 /// \endcode
 /// stmt()
 ///   matches both the compound statement '{ ++a; }' and '++a'.
-const internal::VariadicDynCastAllOfMatcher<Stmt, Stmt> stmt;
+const internal::VariadicAllOfMatcher<Stmt> stmt;
 
 /// \brief Matches declaration statements.
 ///
@@ -922,6 +985,16 @@ const internal::VariadicDynCastAllOfMatcher<
   Stmt,
   UserDefinedLiteral> userDefinedLiteral;
 
+/// \brief Matches compound (i.e. non-scalar) literals
+///
+/// Example match: {1}, (1, 2)
+/// \code
+///   int array[4] = {1}; vector int myvec = (vector int)(1, 2);
+/// \endcode
+const internal::VariadicDynCastAllOfMatcher<
+  Stmt,
+  CompoundLiteralExpr> compoundLiteralExpr;
+
 /// \brief Matches nullptr literal.
 const internal::VariadicDynCastAllOfMatcher<
   Stmt,
@@ -1090,10 +1163,36 @@ const internal::VariadicDynCastAllOfMatcher<
 const internal::VariadicAllOfMatcher<QualType> qualType;
 
 /// \brief Matches \c Types in the clang AST.
-const internal::VariadicDynCastAllOfMatcher<Type, Type> type;
+const internal::VariadicAllOfMatcher<Type> type;
 
 /// \brief Matches \c TypeLocs in the clang AST.
-const internal::VariadicDynCastAllOfMatcher<TypeLoc, TypeLoc> typeLoc;
+const internal::VariadicAllOfMatcher<TypeLoc> typeLoc;
+
+/// \brief Matches if any of the given matchers matches.
+///
+/// Unlike \c anyOf, \c eachOf will generate a match result for each
+/// matching submatcher.
+///
+/// For example, in:
+/// \code
+///   class A { int a; int b; };
+/// \endcode
+/// The matcher:
+/// \code
+///   recordDecl(eachOf(has(fieldDecl(hasName("a")).bind("v")),
+///                     has(fieldDecl(hasName("b")).bind("v"))))
+/// \endcode
+/// will generate two results binding "v", the first of which binds
+/// the field declaration of \c a, the second the field declaration of
+/// \c b.
+///
+/// Usable as: Any Matcher
+template <typename M1, typename M2>
+internal::PolymorphicMatcherWithParam2<internal::EachOfMatcher, M1, M2>
+eachOf(const M1 &P1, const M2 &P2) {
+  return internal::PolymorphicMatcherWithParam2<internal::EachOfMatcher, M1,
+                                                M2>(P1, P2);
+}
 
 /// \brief Various overloads for the anyOf matcher.
 /// @{
@@ -1139,18 +1238,40 @@ anyOf(const M1 &P1, const M2 &P2, const M3 &P3, const M4 &P4, const M5 &P5) {
 /// \brief Matches if all given matchers match.
 ///
 /// Usable as: Any Matcher
-template<typename M1, typename M2>
+template <typename M1, typename M2>
 internal::PolymorphicMatcherWithParam2<internal::AllOfMatcher, M1, M2>
 allOf(const M1 &P1, const M2 &P2) {
-  return internal::PolymorphicMatcherWithParam2<internal::AllOfMatcher,
-                                                M1, M2>(P1, P2);
+  return internal::PolymorphicMatcherWithParam2<internal::AllOfMatcher, M1, M2>(
+      P1, P2);
 }
-template<typename M1, typename M2, typename M3>
-internal::PolymorphicMatcherWithParam2<internal::AllOfMatcher, M1,
+template <typename M1, typename M2, typename M3>
+internal::PolymorphicMatcherWithParam2<
+    internal::AllOfMatcher, M1,
     internal::PolymorphicMatcherWithParam2<internal::AllOfMatcher, M2, M3> >
 allOf(const M1 &P1, const M2 &P2, const M3 &P3) {
   return allOf(P1, allOf(P2, P3));
 }
+template <typename M1, typename M2, typename M3, typename M4>
+internal::PolymorphicMatcherWithParam2<
+    internal::AllOfMatcher, M1,
+    internal::PolymorphicMatcherWithParam2<
+        internal::AllOfMatcher, M2, internal::PolymorphicMatcherWithParam2<
+                                        internal::AllOfMatcher, M3, M4> > >
+allOf(const M1 &P1, const M2 &P2, const M3 &P3, const M4 &P4) {
+  return allOf(P1, allOf(P2, P3, P4));
+}
+template <typename M1, typename M2, typename M3, typename M4, typename M5>
+internal::PolymorphicMatcherWithParam2<
+    internal::AllOfMatcher, M1,
+    internal::PolymorphicMatcherWithParam2<
+        internal::AllOfMatcher, M2,
+        internal::PolymorphicMatcherWithParam2<
+            internal::AllOfMatcher, M3,
+            internal::PolymorphicMatcherWithParam2<internal::AllOfMatcher, M4,
+                                                   M5> > > >
+allOf(const M1 &P1, const M2 &P2, const M3 &P3, const M4 &P4, const M5 &P5) {
+  return allOf(P1, allOf(P2, P3, P4, P5));
+}
 
 /// @}
 
@@ -1198,7 +1319,7 @@ AST_MATCHER_P(UnaryExprOrTypeTraitExpr, ofKind, UnaryExprOrTypeTrait, Kind) {
 /// alignof.
 inline internal::Matcher<Stmt> alignOfExpr(
     const internal::Matcher<UnaryExprOrTypeTraitExpr> &InnerMatcher) {
-  return internal::Matcher<Stmt>(unaryExprOrTypeTraitExpr(allOf(
+  return stmt(unaryExprOrTypeTraitExpr(allOf(
       ofKind(UETT_AlignOf), InnerMatcher)));
 }
 
@@ -1206,8 +1327,8 @@ inline internal::Matcher<Stmt> alignOfExpr(
 /// sizeof.
 inline internal::Matcher<Stmt> sizeOfExpr(
     const internal::Matcher<UnaryExprOrTypeTraitExpr> &InnerMatcher) {
-  return internal::Matcher<Stmt>(unaryExprOrTypeTraitExpr(allOf(
-      ofKind(UETT_SizeOf), InnerMatcher)));
+  return stmt(unaryExprOrTypeTraitExpr(
+      allOf(ofKind(UETT_SizeOf), InnerMatcher)));
 }
 
 /// \brief Matches NamedDecl nodes that have the specified name.
@@ -1228,8 +1349,8 @@ inline internal::Matcher<Stmt> sizeOfExpr(
 AST_MATCHER_P(NamedDecl, hasName, std::string, Name) {
   assert(!Name.empty());
   const std::string FullNameString = "::" + Node.getQualifiedNameAsString();
-  const llvm::StringRef FullName = FullNameString;
-  const llvm::StringRef Pattern = Name;
+  const StringRef FullName = FullNameString;
+  const StringRef Pattern = Name;
   if (Pattern.startswith("::")) {
     return FullName == Pattern;
   } else {
@@ -1237,8 +1358,8 @@ AST_MATCHER_P(NamedDecl, hasName, std::string, Name) {
   }
 }
 
-/// \brief Matches NamedDecl nodes whose full names partially match the
-/// given RegExp.
+/// \brief Matches NamedDecl nodes whose fully qualified names contain
+/// a substring matched by the given RegExp.
 ///
 /// Supports specifying enclosing namespaces or classes by
 /// prefixing the name with '<enclosing>::'.  Does not match typedefs
@@ -1263,18 +1384,26 @@ AST_MATCHER_P(NamedDecl, matchesName, std::string, RegExp) {
 /// \brief Matches overloaded operator names.
 ///
 /// Matches overloaded operator names specified in strings without the
-/// "operator" prefix, such as "<<", for OverloadedOperatorCall's.
+/// "operator" prefix: e.g. "<<".
 ///
-/// Example matches a << b
-///     (matcher == operatorCallExpr(hasOverloadedOperatorName("<<")))
+/// Given:
 /// \code
-///   a << b;
-///   c && d;  // assuming both operator<<
-///            // and operator&& are overloaded somewhere.
+///   class A { int operator*(); };
+///   const A &operator<<(const A &a, const A &b);
+///   A a;
+///   a << a;   // <-- This matches
 /// \endcode
-AST_MATCHER_P(CXXOperatorCallExpr,
-              hasOverloadedOperatorName, std::string, Name) {
-  return getOperatorSpelling(Node.getOperator()) == Name;
+///
+/// \c operatorCallExpr(hasOverloadedOperatorName("<<"))) matches the specified
+/// line and \c recordDecl(hasMethod(hasOverloadedOperatorName("*"))) matches
+/// the declaration of \c A.
+///
+/// Usable as: Matcher<CXXOperatorCallExpr>, Matcher<CXXMethodDecl>
+inline internal::PolymorphicMatcherWithParam1<
+    internal::HasOverloadedOperatorNameMatcher, StringRef>
+hasOverloadedOperatorName(const StringRef Name) {
+  return internal::PolymorphicMatcherWithParam1<
+      internal::HasOverloadedOperatorNameMatcher, StringRef>(Name);
 }
 
 /// \brief Matches C++ classes that are directly or indirectly derived from
@@ -1324,6 +1453,27 @@ inline internal::Matcher<CXXRecordDecl> isSameOrDerivedFrom(
   return isSameOrDerivedFrom(hasName(BaseName));
 }
 
+/// \brief Matches the first method of a class or struct that satisfies \c
+/// InnerMatcher.
+///
+/// Given:
+/// \code
+///   class A { void func(); };
+///   class B { void member(); };
+/// \code
+///
+/// \c recordDecl(hasMethod(hasName("func"))) matches the declaration of \c A
+/// but not \c B.
+AST_MATCHER_P(CXXRecordDecl, hasMethod, internal::Matcher<CXXMethodDecl>,
+              InnerMatcher) {
+  for (CXXRecordDecl::method_iterator I = Node.method_begin(),
+                                      E = Node.method_end();
+       I != E; ++I)
+    if (InnerMatcher.matches(**I, Finder, Builder))
+      return true;
+  return false;
+}
+
 /// \brief Matches AST nodes that have child AST nodes that match the
 /// provided matcher.
 ///
@@ -1424,6 +1574,29 @@ forEachDescendant(
     DescendantT>(DescendantMatcher);
 }
 
+/// \brief Matches if the node or any descendant matches.
+///
+/// Generates results for each match.
+///
+/// For example, in:
+/// \code
+///   class A { class B {}; class C {}; };
+/// \endcode
+/// The matcher:
+/// \code
+///   recordDecl(hasName("::A"), findAll(recordDecl(isDefinition()).bind("m")))
+/// \endcode
+/// will generate results for \c A, \c B and \c C.
+///
+/// Usable as: Any Matcher
+template <typename T>
+internal::PolymorphicMatcherWithParam2<
+    internal::EachOfMatcher, internal::Matcher<T>,
+    internal::ArgumentAdaptingMatcher<internal::ForEachDescendantMatcher, T> >
+findAll(const internal::Matcher<T> &Matcher) {
+  return eachOf(Matcher, forEachDescendant(Matcher));
+}
+
 /// \brief Matches AST nodes that have a parent that matches the provided
 /// matcher.
 ///
@@ -1480,8 +1653,13 @@ unless(const M &InnerMatcher) {
 /// \brief Matches a type if the declaration of the type matches the given
 /// matcher.
 ///
+/// In addition to being usable as Matcher<TypedefType>, also usable as
+/// Matcher<T> for any T supporting the getDecl() member function. e.g. various
+/// subtypes of clang::Type.
+///
 /// Usable as: Matcher<QualType>, Matcher<CallExpr>, Matcher<CXXConstructExpr>,
-///   Matcher<MemberExpr>
+///   Matcher<MemberExpr>, Matcher<TypedefType>,
+///   Matcher<TemplateSpecializationType>
 inline internal::PolymorphicMatcherWithParam1< internal::HasDeclarationMatcher,
                                      internal::Matcher<Decl> >
     hasDeclaration(const internal::Matcher<Decl> &InnerMatcher) {
@@ -1501,9 +1679,8 @@ inline internal::PolymorphicMatcherWithParam1< internal::HasDeclarationMatcher,
 /// FIXME: Overload to allow directly matching types?
 AST_MATCHER_P(CXXMemberCallExpr, on, internal::Matcher<Expr>,
               InnerMatcher) {
-  const Expr *ExprNode = const_cast<CXXMemberCallExpr&>(Node)
-      .getImplicitObjectArgument()
-      ->IgnoreParenImpCasts();
+  const Expr *ExprNode = Node.getImplicitObjectArgument()
+                            ->IgnoreParenImpCasts();
   return (ExprNode != NULL &&
           InnerMatcher.matches(*ExprNode, Finder, Builder));
 }
@@ -1541,7 +1718,7 @@ AST_MATCHER_P(CallExpr, callee, internal::Matcher<Stmt>,
 /// \endcode
 inline internal::Matcher<CallExpr> callee(
     const internal::Matcher<Decl> &InnerMatcher) {
-  return internal::Matcher<CallExpr>(hasDeclaration(InnerMatcher));
+  return callExpr(hasDeclaration(InnerMatcher));
 }
 
 /// \brief Matches if the expression's or declaration's type matches a type
@@ -1579,11 +1756,10 @@ AST_POLYMORPHIC_MATCHER_P(hasType, internal::Matcher<QualType>,
 ///
 /// Usable as: Matcher<Expr>, Matcher<ValueDecl>
 inline internal::PolymorphicMatcherWithParam1<
-  internal::matcher_hasTypeMatcher,
+  internal::matcher_hasType0Matcher,
   internal::Matcher<QualType> >
 hasType(const internal::Matcher<Decl> &InnerMatcher) {
-  return hasType(internal::Matcher<QualType>(
-    hasDeclaration(InnerMatcher)));
+  return hasType(qualType(hasDeclaration(InnerMatcher)));
 }
 
 /// \brief Matches if the matched type is represented by the given string.
@@ -1618,8 +1794,7 @@ AST_MATCHER_P(
 /// \brief Overloaded to match the pointee type's declaration.
 inline internal::Matcher<QualType> pointsTo(
     const internal::Matcher<Decl> &InnerMatcher) {
-  return pointsTo(internal::Matcher<QualType>(
-    hasDeclaration(InnerMatcher)));
+  return pointsTo(qualType(hasDeclaration(InnerMatcher)));
 }
 
 /// \brief Matches if the matched type is a reference type and the referenced
@@ -1640,17 +1815,32 @@ AST_MATCHER_P(QualType, references, internal::Matcher<QualType>,
           InnerMatcher.matches(Node->getPointeeType(), Finder, Builder));
 }
 
+/// \brief Matches QualTypes whose canonical type matches InnerMatcher.
+///
+/// Given:
+/// \code
+///   typedef int &int_ref;
+///   int a;
+///   int_ref b = a;
+/// \code
+///
+/// \c varDecl(hasType(qualType(referenceType()))))) will not match the
+/// declaration of b but \c
+/// varDecl(hasType(qualType(hasCanonicalType(referenceType())))))) does.
+AST_MATCHER_P(QualType, hasCanonicalType, internal::Matcher<QualType>,
+              InnerMatcher) {
+  return InnerMatcher.matches(Node.getCanonicalType(), Finder, Builder);
+}
+
 /// \brief Overloaded to match the referenced type's declaration.
 inline internal::Matcher<QualType> references(
     const internal::Matcher<Decl> &InnerMatcher) {
-  return references(internal::Matcher<QualType>(
-    hasDeclaration(InnerMatcher)));
+  return references(qualType(hasDeclaration(InnerMatcher)));
 }
 
 AST_MATCHER_P(CXXMemberCallExpr, onImplicitObjectArgument,
               internal::Matcher<Expr>, InnerMatcher) {
-  const Expr *ExprNode =
-      const_cast<CXXMemberCallExpr&>(Node).getImplicitObjectArgument();
+  const Expr *ExprNode = Node.getImplicitObjectArgument();
   return (ExprNode != NULL &&
           InnerMatcher.matches(*ExprNode, Finder, Builder));
 }
@@ -1705,8 +1895,7 @@ AST_MATCHER_P(DeclRefExpr, to, internal::Matcher<Decl>,
 AST_MATCHER_P(DeclRefExpr, throughUsingDecl,
               internal::Matcher<UsingShadowDecl>, InnerMatcher) {
   const NamedDecl *FoundDecl = Node.getFoundDecl();
-  if (const UsingShadowDecl *UsingDecl =
-      llvm::dyn_cast<UsingShadowDecl>(FoundDecl))
+  if (const UsingShadowDecl *UsingDecl = dyn_cast<UsingShadowDecl>(FoundDecl))
     return InnerMatcher.matches(*UsingDecl, Finder, Builder);
   return false;
 }
@@ -1974,6 +2163,19 @@ AST_MATCHER_P(FunctionDecl, hasAnyParameter,
   return false;
 }
 
+/// \brief Matches \c FunctionDecls that have a specific parameter count.
+///
+/// Given
+/// \code
+///   void f(int i) {}
+///   void g(int i, int j) {}
+/// \endcode
+/// functionDecl(parameterCountIs(2))
+///   matches g(int i, int j) {}
+AST_MATCHER_P(FunctionDecl, parameterCountIs, unsigned, N) {
+  return Node.getNumParams() == N;
+}
+
 /// \brief Matches the return type of a function declaration.
 ///
 /// Given:
@@ -2279,10 +2481,13 @@ AST_MATCHER_P(ConditionalOperator, hasFalseExpression,
 /// \endcode
 ///
 /// Usable as: Matcher<TagDecl>, Matcher<VarDecl>, Matcher<FunctionDecl>
-inline internal::PolymorphicMatcherWithParam0<internal::IsDefinitionMatcher>
-isDefinition() {
-  return internal::PolymorphicMatcherWithParam0<
-    internal::IsDefinitionMatcher>();
+AST_POLYMORPHIC_MATCHER(isDefinition) {
+  TOOLING_COMPILE_ASSERT(
+      (llvm::is_base_of<TagDecl, NodeType>::value) ||
+      (llvm::is_base_of<VarDecl, NodeType>::value) ||
+      (llvm::is_base_of<FunctionDecl, NodeType>::value),
+      is_definition_requires_isThisDeclarationADefinition_method);
+  return Node.isThisDeclarationADefinition();
 }
 
 /// \brief Matches the class declaration that the given method declaration
@@ -2324,8 +2529,8 @@ AST_MATCHER_P(CXXMethodDecl, ofClass,
 /// \endcode
 /// memberExpr(isArrow())
 ///   matches this->x, x, y.x, a, this->b
-inline internal::Matcher<MemberExpr> isArrow() {
-  return makeMatcher(new internal::IsArrowMatcher());
+AST_MATCHER(MemberExpr, isArrow) {
+  return Node.isArrow();
 }
 
 /// \brief Matches QualType nodes that are of integer type.
@@ -2357,8 +2562,25 @@ AST_MATCHER(QualType, isInteger) {
 ///   matches "void b(int const)", "void c(const int)" and
 ///   "void e(int const) {}". It does not match d as there
 ///   is no top-level const on the parameter type "const int *".
-inline internal::Matcher<QualType> isConstQualified() {
-  return makeMatcher(new internal::IsConstQualifiedMatcher());
+AST_MATCHER(QualType, isConstQualified) {
+  return Node.isConstQualified();
+}
+
+/// \brief Matches QualType nodes that have local CV-qualifiers attached to
+/// the node, not hidden within a typedef.
+///
+/// Given
+/// \code
+///   typedef const int const_int;
+///   const_int i;
+///   int *const j;
+///   int *volatile k;
+///   int m;
+/// \endcode
+/// \c varDecl(hasType(hasLocalQualifiers())) matches only \c j and \c k.
+/// \c i is const-qualified but the qualifier is not local.
+AST_MATCHER(QualType, hasLocalQualifiers) {
+  return Node.hasLocalQualifiers();
 }
 
 /// \brief Matches a member expression where the member is matched by a
@@ -2454,11 +2676,14 @@ AST_MATCHER_P(UsingShadowDecl, hasTargetDecl,
 ///   does not match, as X<A> is an explicit template specialization.
 ///
 /// Usable as: Matcher<FunctionDecl>, Matcher<VarDecl>, Matcher<CXXRecordDecl>
-inline internal::PolymorphicMatcherWithParam0<
-  internal::IsTemplateInstantiationMatcher>
-isTemplateInstantiation() {
-  return internal::PolymorphicMatcherWithParam0<
-    internal::IsTemplateInstantiationMatcher>();
+AST_POLYMORPHIC_MATCHER(isTemplateInstantiation) {
+  TOOLING_COMPILE_ASSERT((llvm::is_base_of<FunctionDecl, NodeType>::value) ||
+                         (llvm::is_base_of<VarDecl, NodeType>::value) ||
+                         (llvm::is_base_of<CXXRecordDecl, NodeType>::value),
+                         requires_getTemplateSpecializationKind_method);
+  return (Node.getTemplateSpecializationKind() == TSK_ImplicitInstantiation ||
+          Node.getTemplateSpecializationKind() ==
+          TSK_ExplicitInstantiationDefinition);
 }
 
 /// \brief Matches explicit template specializations of function, class, or
@@ -2473,11 +2698,12 @@ isTemplateInstantiation() {
 ///   matches the specialization A<int>().
 ///
 /// Usable as: Matcher<FunctionDecl>, Matcher<VarDecl>, Matcher<CXXRecordDecl>
-inline internal::PolymorphicMatcherWithParam0<
-  internal::IsExplicitTemplateSpecializationMatcher>
-isExplicitTemplateSpecialization() {
-  return internal::PolymorphicMatcherWithParam0<
-    internal::IsExplicitTemplateSpecializationMatcher>();
+AST_POLYMORPHIC_MATCHER(isExplicitTemplateSpecialization) {
+  TOOLING_COMPILE_ASSERT((llvm::is_base_of<FunctionDecl, NodeType>::value) ||
+                         (llvm::is_base_of<VarDecl, NodeType>::value) ||
+                         (llvm::is_base_of<CXXRecordDecl, NodeType>::value),
+                         requires_getTemplateSpecializationKind_method);
+  return (Node.getTemplateSpecializationKind() == TSK_ExplicitSpecialization);
 }
 
 /// \brief Matches \c TypeLocs for which the given inner
@@ -2685,6 +2911,32 @@ AST_TYPE_TRAVERSE_MATCHER(hasDeducedType, getDeducedType);
 ///   matches "int (*f)(int)" and the type of "g".
 AST_TYPE_MATCHER(FunctionType, functionType);
 
+/// \brief Matches \c ParenType nodes.
+///
+/// Given
+/// \code
+///   int (*ptr_to_array)[4];
+///   int *array_of_ptrs[4];
+/// \endcode
+///
+/// \c varDecl(hasType(pointsTo(parenType()))) matches \c ptr_to_array but not
+/// \c array_of_ptrs.
+AST_TYPE_MATCHER(ParenType, parenType);
+
+/// \brief Matches \c ParenType nodes where the inner type is a specific type.
+///
+/// Given
+/// \code
+///   int (*ptr_to_array)[4];
+///   int (*ptr_to_func)(int);
+/// \endcode
+///
+/// \c varDecl(hasType(pointsTo(parenType(innerType(functionType()))))) matches
+/// \c ptr_to_func but not \c ptr_to_array.
+///
+/// Usable as: Matcher<ParenType>
+AST_TYPE_TRAVERSE_MATCHER(innerType, getInnerType);
+
 /// \brief Matches block pointer types, i.e. types syntactically represented as
 /// "void (^)(int)".
 ///
@@ -2713,18 +2965,56 @@ AST_TYPE_MATCHER(MemberPointerType, memberPointerType);
 ///   matches "int *a"
 AST_TYPE_MATCHER(PointerType, pointerType);
 
-/// \brief Matches reference types.
+/// \brief Matches both lvalue and rvalue reference types.
 ///
 /// Given
 /// \code
 ///   int *a;
 ///   int &b = *a;
-///   int c = 5;
+///   int &&c = 1;
+///   auto &d = b;
+///   auto &&e = c;
+///   auto &&f = 2;
+///   int g = 5;
 /// \endcode
-/// pointerType()
-///   matches "int &b"
+///
+/// \c referenceType() matches the types of \c b, \c c, \c d, \c e, and \c f.
 AST_TYPE_MATCHER(ReferenceType, referenceType);
 
+/// \brief Matches lvalue reference types.
+///
+/// Given:
+/// \code
+///   int *a;
+///   int &b = *a;
+///   int &&c = 1;
+///   auto &d = b;
+///   auto &&e = c;
+///   auto &&f = 2;
+///   int g = 5;
+/// \endcode
+///
+/// \c lValueReferenceType() matches the types of \c b, \c d, and \c e. \c e is
+/// matched since the type is deduced as int& by reference collapsing rules.
+AST_TYPE_MATCHER(LValueReferenceType, lValueReferenceType);
+
+/// \brief Matches rvalue reference types.
+///
+/// Given:
+/// \code
+///   int *a;
+///   int &b = *a;
+///   int &&c = 1;
+///   auto &d = b;
+///   auto &&e = c;
+///   auto &&f = 2;
+///   int g = 5;
+/// \endcode
+///
+/// \c rValueReferenceType() matches the types of \c c and \c f. \c e is not
+/// matched as it is deduced to int& by reference collapsing rules.
+AST_TYPE_MATCHER(RValueReferenceType, rValueReferenceType);
+
 /// \brief Narrows PointerType (and similar) matchers to those where the
 /// \c pointee matches a given matcher.
 ///
@@ -2751,11 +3041,116 @@ AST_TYPELOC_TRAVERSE_MATCHER(pointee, getPointee);
 ///   matches "typedef int X"
 AST_TYPE_MATCHER(TypedefType, typedefType);
 
-/// \brief Matches \c TypedefTypes referring to a specific
-/// \c TypedefNameDecl.
-AST_MATCHER_P(TypedefType, hasDecl,
-              internal::Matcher<TypedefNameDecl>, InnerMatcher) {
-  return InnerMatcher.matches(*Node.getDecl(), Finder, Builder);
+/// \brief Matches template specialization types.
+///
+/// Given
+/// \code
+///   template <typename T>
+///   class C { };
+///
+///   template class C<int>;  // A
+///   C<char> var;            // B
+/// \code
+///
+/// \c templateSpecializationType() matches the type of the explicit
+/// instantiation in \c A and the type of the variable declaration in \c B.
+AST_TYPE_MATCHER(TemplateSpecializationType, templateSpecializationType);
+
+/// \brief Matches record types (e.g. structs, classes).
+///
+/// Given
+/// \code
+///   class C {};
+///   struct S {};
+///
+///   C c;
+///   S s;
+/// \code
+///
+/// \c recordType() matches the type of the variable declarations of both \c c
+/// and \c s.
+AST_TYPE_MATCHER(RecordType, recordType);
+
+/// \brief Matches types specified with an elaborated type keyword or with a
+/// qualified name.
+///
+/// Given
+/// \code
+///   namespace N {
+///     namespace M {
+///       class D {};
+///     }
+///   }
+///   class C {};
+///
+///   class C c;
+///   N::M::D d;
+/// \code
+///
+/// \c elaboratedType() matches the type of the variable declarations of both
+/// \c c and \c d.
+AST_TYPE_MATCHER(ElaboratedType, elaboratedType);
+
+/// \brief Matches ElaboratedTypes whose qualifier, a NestedNameSpecifier,
+/// matches \c InnerMatcher if the qualifier exists.
+///
+/// Given
+/// \code
+///   namespace N {
+///     namespace M {
+///       class D {};
+///     }
+///   }
+///   N::M::D d;
+/// \code
+///
+/// \c elaboratedType(hasQualifier(hasPrefix(specifiesNamespace(hasName("N"))))
+/// matches the type of the variable declaration of \c d.
+AST_MATCHER_P(ElaboratedType, hasQualifier,
+              internal::Matcher<NestedNameSpecifier>, InnerMatcher) {
+  if (const NestedNameSpecifier *Qualifier = Node.getQualifier())
+    return InnerMatcher.matches(*Qualifier, Finder, Builder);
+
+  return false;
+}
+
+/// \brief Matches ElaboratedTypes whose named type matches \c InnerMatcher.
+///
+/// Given
+/// \code
+///   namespace N {
+///     namespace M {
+///       class D {};
+///     }
+///   }
+///   N::M::D d;
+/// \code
+///
+/// \c elaboratedType(namesType(recordType(
+/// hasDeclaration(namedDecl(hasName("D")))))) matches the type of the variable
+/// declaration of \c d.
+AST_MATCHER_P(ElaboratedType, namesType, internal::Matcher<QualType>,
+              InnerMatcher) {
+  return InnerMatcher.matches(Node.getNamedType(), Finder, Builder);
+}
+
+/// \brief Matches declarations whose declaration context, interpreted as a
+/// Decl, matches \c InnerMatcher.
+///
+/// Given
+/// \code
+///   namespace N {
+///     namespace M {
+///       class D {};
+///     }
+///   }
+/// \code
+///
+/// \c recordDecl(hasDeclContext(namedDecl(hasName("M")))) matches the
+/// declaration of \c class \c D.
+AST_MATCHER_P(Decl, hasDeclContext, internal::Matcher<Decl>, InnerMatcher) {
+  return InnerMatcher.matches(*Decl::castFromDeclContext(Node.getDeclContext()),
+                              Finder, Builder);
 }
 
 /// \brief Matches nested name specifiers.
@@ -2828,10 +3223,13 @@ AST_MATCHER_P(NestedNameSpecifierLoc, specifiesTypeLoc,
 /// \endcode
 /// nestedNameSpecifier(hasPrefix(specifiesType(asString("struct A")))) and
 ///   matches "A::"
-inline internal::Matcher<NestedNameSpecifier> hasPrefix(
-    const internal::Matcher<NestedNameSpecifier> &InnerMatcher) {
-  return internal::makeMatcher(
-    new internal::NestedNameSpecifierPrefixMatcher(InnerMatcher));
+AST_MATCHER_P_OVERLOAD(NestedNameSpecifier, hasPrefix,
+                       internal::Matcher<NestedNameSpecifier>, InnerMatcher,
+                       0) {
+  NestedNameSpecifier *NextNode = Node.getPrefix();
+  if (NextNode == NULL)
+    return false;
+  return InnerMatcher.matches(*NextNode, Finder, Builder);
 }
 
 /// \brief Matches on the prefix of a \c NestedNameSpecifierLoc.
@@ -2843,10 +3241,13 @@ inline internal::Matcher<NestedNameSpecifier> hasPrefix(
 /// \endcode
 /// nestedNameSpecifierLoc(hasPrefix(loc(specifiesType(asString("struct A")))))
 ///   matches "A::"
-inline internal::Matcher<NestedNameSpecifierLoc> hasPrefix(
-    const internal::Matcher<NestedNameSpecifierLoc> &InnerMatcher) {
-  return internal::makeMatcher(
-    new internal::NestedNameSpecifierLocPrefixMatcher(InnerMatcher));
+AST_MATCHER_P_OVERLOAD(NestedNameSpecifierLoc, hasPrefix,
+                       internal::Matcher<NestedNameSpecifierLoc>, InnerMatcher,
+                       1) {
+  NestedNameSpecifierLoc NextNode = Node.getPrefix();
+  if (!NextNode)
+    return false;
+  return InnerMatcher.matches(NextNode, Finder, Builder);
 }
 
 /// \brief Matches nested name specifiers that specify a namespace matching the
@@ -2866,6 +3267,26 @@ AST_MATCHER_P(NestedNameSpecifier, specifiesNamespace,
   return InnerMatcher.matches(*Node.getAsNamespace(), Finder, Builder);
 }
 
+/// \brief Overloads for the \c equalsNode matcher.
+/// FIXME: Implement for other node types.
+/// @{
+
+/// \brief Matches if a node equals another node.
+///
+/// \c Decl has pointer identity in the AST.
+AST_MATCHER_P_OVERLOAD(Decl, equalsNode, Decl*, Other, 0) {
+  return &Node == Other;
+}
+/// \brief Matches if a node equals another node.
+///
+/// \c Stmt has pointer identity in the AST.
+///
+AST_MATCHER_P_OVERLOAD(Stmt, equalsNode, Stmt*, Other, 1) {
+  return &Node == Other;
+}
+
+/// @}
+
 } // end namespace ast_matchers
 } // end namespace clang
 
diff --git a/include/clang/ASTMatchers/ASTMatchersInternal.h b/include/clang/ASTMatchers/ASTMatchersInternal.h
index e5365ff..30691ad 100644
--- a/include/clang/ASTMatchers/ASTMatchersInternal.h
+++ b/include/clang/ASTMatchers/ASTMatchersInternal.h
@@ -35,13 +35,13 @@
 #ifndef LLVM_CLANG_AST_MATCHERS_AST_MATCHERS_INTERNAL_H
 #define LLVM_CLANG_AST_MATCHERS_AST_MATCHERS_INTERNAL_H
 
-#include "clang/AST/Decl.h"
+#include "clang/AST/ASTTypeTraits.h"
 #include "clang/AST/DeclCXX.h"
+#include "clang/AST/Decl.h"
 #include "clang/AST/ExprCXX.h"
-#include "clang/AST/Stmt.h"
 #include "clang/AST/StmtCXX.h"
+#include "clang/AST/Stmt.h"
 #include "clang/AST/Type.h"
-#include "clang/ASTMatchers/ASTTypeTraits.h"
 #include "llvm/ADT/VariadicFunction.h"
 #include "llvm/Support/type_traits.h"
 #include <map>
@@ -193,7 +193,7 @@ class ASTMatchFinder;
 /// current node and doesn't care about its children or descendants,
 /// implement SingleNodeMatcherInterface instead.
 template <typename T>
-class MatcherInterface : public llvm::RefCountedBaseVPTR {
+class MatcherInterface : public RefCountedBaseVPTR {
 public:
   virtual ~MatcherInterface() {}
 
@@ -343,7 +343,7 @@ private:
     const Matcher<Base> From;
   };
 
-  llvm::IntrusiveRefCntPtr< MatcherInterface<T> > Implementation;
+  IntrusiveRefCntPtr< MatcherInterface<T> > Implementation;
 };  // class Matcher
 
 /// \brief A convenient helper for creating a Matcher<T> without specifying
@@ -353,6 +353,61 @@ inline Matcher<T> makeMatcher(MatcherInterface<T> *Implementation) {
   return Matcher<T>(Implementation);
 }
 
+/// \brief Metafunction to determine if type T has a member called getDecl.
+template <typename T> struct has_getDecl {
+  struct Default { int getDecl; };
+  struct Derived : T, Default { };
+
+  template<typename C, C> struct CheckT;
+
+  // If T::getDecl exists, an ambiguity arises and CheckT will
+  // not be instantiable. This makes f(...) the only available
+  // overload.
+  template<typename C>
+  static char (&f(CheckT<int Default::*, &C::getDecl>*))[1];
+  template<typename C> static char (&f(...))[2];
+
+  static bool const value = sizeof(f<Derived>(0)) == 2;
+};
+
+/// \brief Matches overloaded operators with a specific name.
+///
+/// The type argument ArgT is not used by this matcher but is used by
+/// PolymorphicMatcherWithParam1 and should be StringRef.
+template <typename T, typename ArgT>
+class HasOverloadedOperatorNameMatcher : public SingleNodeMatcherInterface<T> {
+  TOOLING_COMPILE_ASSERT((llvm::is_same<T, CXXOperatorCallExpr>::value ||
+                          llvm::is_same<T, CXXMethodDecl>::value),
+                         unsupported_class_for_matcher);
+  TOOLING_COMPILE_ASSERT((llvm::is_same<ArgT, StringRef>::value),
+                         argument_type_must_be_StringRef);
+public:
+  explicit HasOverloadedOperatorNameMatcher(const StringRef Name)
+      : SingleNodeMatcherInterface<T>(), Name(Name) {}
+
+  virtual bool matchesNode(const T &Node) const LLVM_OVERRIDE {
+    return matchesSpecialized(Node);
+  }
+
+private:
+
+  /// \brief CXXOperatorCallExpr exist only for calls to overloaded operators
+  /// so this function returns true if the call is to an operator of the given
+  /// name.
+  bool matchesSpecialized(const CXXOperatorCallExpr &Node) const {
+    return getOperatorSpelling(Node.getOperator()) == Name;
+  }
+
+  /// \brief Returns true only if CXXMethodDecl represents an overloaded
+  /// operator and has the given operator name.
+  bool matchesSpecialized(const CXXMethodDecl &Node) const {
+    return Node.isOverloadedOperator() &&
+           getOperatorSpelling(Node.getOverloadedOperator()) == Name;
+  }
+
+  std::string Name;
+};
+
 /// \brief Matches declarations for QualType and CallExpr.
 ///
 /// Type argument DeclMatcherT is required by PolymorphicMatcherWithParam1 but
@@ -373,16 +428,36 @@ public:
   }
 
 private:
-  /// \brief Extracts the CXXRecordDecl of a QualType and returns whether the
-  /// inner matcher matches on it.
+  /// \brief If getDecl exists as a member of U, returns whether the inner
+  /// matcher matches Node.getDecl().
+  template <typename U>
+  bool matchesSpecialized(
+      const U &Node, ASTMatchFinder *Finder, BoundNodesTreeBuilder *Builder,
+      typename llvm::enable_if<has_getDecl<U>, int>::type = 0) const {
+    return matchesDecl(Node.getDecl(), Finder, Builder);
+  }
+
+  /// \brief Extracts the CXXRecordDecl or EnumDecl of a QualType and returns
+  /// whether the inner matcher matches on it.
   bool matchesSpecialized(const QualType &Node, ASTMatchFinder *Finder,
                           BoundNodesTreeBuilder *Builder) const {
     /// FIXME: Add other ways to convert...
     if (Node.isNull())
       return false;
+    if (const EnumType *AsEnum = dyn_cast<EnumType>(Node.getTypePtr()))
+      return matchesDecl(AsEnum->getDecl(), Finder, Builder);
     return matchesDecl(Node->getAsCXXRecordDecl(), Finder, Builder);
   }
 
+  /// \brief Gets the TemplateDecl from a TemplateSpecializationType
+  /// and returns whether the inner matches on it.
+  bool matchesSpecialized(const TemplateSpecializationType &Node,
+                          ASTMatchFinder *Finder,
+                          BoundNodesTreeBuilder *Builder) const {
+    return matchesDecl(Node.getTemplateName().getAsTemplateDecl(),
+                       Finder, Builder);
+  }
+
   /// \brief Extracts the Decl of the callee of a CallExpr and returns whether
   /// the inner matcher matches on it.
   bool matchesSpecialized(const CallExpr &Node, ASTMatchFinder *Finder,
@@ -537,6 +612,8 @@ public:
                              Matcher, Builder, MatchMode);
   }
 
+  virtual ASTContext &getASTContext() const = 0;
+
 protected:
   virtual bool matchesChildOf(const ast_type_traits::DynTypedNode &Node,
                               const DynTypedMatcher &Matcher,
@@ -672,7 +749,7 @@ public:
   virtual bool matches(const T &Node,
                        ASTMatchFinder *Finder,
                        BoundNodesTreeBuilder *Builder) const {
-    const To *InnerMatchValue = llvm::dyn_cast<To>(&Node);
+    const To *InnerMatchValue = dyn_cast<To>(&Node);
     return InnerMatchValue != NULL &&
       InnerMatcher.matches(*InnerMatchValue, Finder, Builder);
   }
@@ -828,21 +905,56 @@ private:
 /// used. They will always be instantiated with types convertible to
 /// Matcher<T>.
 template <typename T, typename MatcherT1, typename MatcherT2>
+class EachOfMatcher : public MatcherInterface<T> {
+public:
+  EachOfMatcher(const Matcher<T> &InnerMatcher1,
+                const Matcher<T> &InnerMatcher2)
+      : InnerMatcher1(InnerMatcher1), InnerMatcher2(InnerMatcher2) {
+  }
+
+  virtual bool matches(const T &Node, ASTMatchFinder *Finder,
+                       BoundNodesTreeBuilder *Builder) const {
+    BoundNodesTreeBuilder Builder1;
+    bool Matched1 = InnerMatcher1.matches(Node, Finder, &Builder1);
+    if (Matched1)
+      Builder->addMatch(Builder1.build());
+
+    BoundNodesTreeBuilder Builder2;
+    bool Matched2 = InnerMatcher2.matches(Node, Finder, &Builder2);
+    if (Matched2)
+      Builder->addMatch(Builder2.build());
+
+    return Matched1 || Matched2;
+  }
+
+private:
+  const Matcher<T> InnerMatcher1;
+  const Matcher<T> InnerMatcher2;
+};
+
+/// \brief Matches nodes of type T for which at least one of the two provided
+/// matchers matches.
+///
+/// Type arguments MatcherT1 and MatcherT2 are
+/// required by PolymorphicMatcherWithParam2 but not actually
+/// used. They will always be instantiated with types convertible to
+/// Matcher<T>.
+template <typename T, typename MatcherT1, typename MatcherT2>
 class AnyOfMatcher : public MatcherInterface<T> {
 public:
   AnyOfMatcher(const Matcher<T> &InnerMatcher1, const Matcher<T> &InnerMatcher2)
-      : InnerMatcher1(InnerMatcher1), InnertMatcher2(InnerMatcher2) {}
+      : InnerMatcher1(InnerMatcher1), InnerMatcher2(InnerMatcher2) {}
 
   virtual bool matches(const T &Node,
                        ASTMatchFinder *Finder,
                        BoundNodesTreeBuilder *Builder) const {
     return InnerMatcher1.matches(Node, Finder, Builder) ||
-           InnertMatcher2.matches(Node, Finder, Builder);
+           InnerMatcher2.matches(Node, Finder, Builder);
   }
 
 private:
   const Matcher<T> InnerMatcher1;
-  const Matcher<T> InnertMatcher2;
+  const Matcher<T> InnerMatcher2;
 };
 
 /// \brief Creates a Matcher<T> that matches if all inner matchers match.
@@ -989,69 +1101,6 @@ private:
   const ValueT ExpectedValue;
 };
 
-template <typename T>
-class IsDefinitionMatcher : public SingleNodeMatcherInterface<T> {
-  TOOLING_COMPILE_ASSERT(
-    (llvm::is_base_of<TagDecl, T>::value) ||
-    (llvm::is_base_of<VarDecl, T>::value) ||
-    (llvm::is_base_of<FunctionDecl, T>::value),
-    is_definition_requires_isThisDeclarationADefinition_method);
-public:
-  virtual bool matchesNode(const T &Node) const {
-    return Node.isThisDeclarationADefinition();
-  }
-};
-
-/// \brief Matches on template instantiations for FunctionDecl, VarDecl or
-/// CXXRecordDecl nodes.
-template <typename T>
-class IsTemplateInstantiationMatcher : public MatcherInterface<T> {
-  TOOLING_COMPILE_ASSERT((llvm::is_base_of<FunctionDecl, T>::value) ||
-                         (llvm::is_base_of<VarDecl, T>::value) ||
-                         (llvm::is_base_of<CXXRecordDecl, T>::value),
-                         requires_getTemplateSpecializationKind_method);
- public:
-  virtual bool matches(const T& Node,
-                       ASTMatchFinder* Finder,
-                       BoundNodesTreeBuilder* Builder) const {
-    return (Node.getTemplateSpecializationKind() ==
-                TSK_ImplicitInstantiation ||
-            Node.getTemplateSpecializationKind() ==
-                TSK_ExplicitInstantiationDefinition);
-  }
-};
-
-/// \brief Matches on explicit template specializations for FunctionDecl,
-/// VarDecl or CXXRecordDecl nodes.
-template <typename T>
-class IsExplicitTemplateSpecializationMatcher : public MatcherInterface<T> {
-  TOOLING_COMPILE_ASSERT((llvm::is_base_of<FunctionDecl, T>::value) ||
-                         (llvm::is_base_of<VarDecl, T>::value) ||
-                         (llvm::is_base_of<CXXRecordDecl, T>::value),
-                         requires_getTemplateSpecializationKind_method);
- public:
-  virtual bool matches(const T& Node,
-                       ASTMatchFinder* Finder,
-                       BoundNodesTreeBuilder* Builder) const {
-    return (Node.getTemplateSpecializationKind() == TSK_ExplicitSpecialization);
-  }
-};
-
-class IsArrowMatcher : public SingleNodeMatcherInterface<MemberExpr> {
-public:
-  virtual bool matchesNode(const MemberExpr &Node) const {
-    return Node.isArrow();
-  }
-};
-
-class IsConstQualifiedMatcher
-    : public SingleNodeMatcherInterface<QualType> {
- public:
-  virtual bool matchesNode(const QualType& Node) const {
-    return Node.isConstQualified();
-  }
-};
-
 /// \brief A VariadicDynCastAllOfMatcher<SourceT, TargetT> object is a
 /// variadic functor that takes a number of Matcher<TargetT> and returns a
 /// Matcher<SourceT> that matches TargetT nodes that are matched by all of the
@@ -1115,50 +1164,6 @@ private:
   const Matcher<T> InnerMatcher;
 };
 
-/// \brief Matches \c NestedNameSpecifiers with a prefix matching another
-/// \c Matcher<NestedNameSpecifier>.
-class NestedNameSpecifierPrefixMatcher
-  : public MatcherInterface<NestedNameSpecifier> {
-public:
-  explicit NestedNameSpecifierPrefixMatcher(
-    const Matcher<NestedNameSpecifier> &InnerMatcher)
-    : InnerMatcher(InnerMatcher) {}
-
-  virtual bool matches(const NestedNameSpecifier &Node,
-                       ASTMatchFinder *Finder,
-                       BoundNodesTreeBuilder *Builder) const {
-    NestedNameSpecifier *NextNode = Node.getPrefix();
-    if (NextNode == NULL)
-      return false;
-    return InnerMatcher.matches(*NextNode, Finder, Builder);
-  }
-
-private:
-  const Matcher<NestedNameSpecifier> InnerMatcher;
-};
-
-/// \brief Matches \c NestedNameSpecifierLocs with a prefix matching another
-/// \c Matcher<NestedNameSpecifierLoc>.
-class NestedNameSpecifierLocPrefixMatcher
-  : public MatcherInterface<NestedNameSpecifierLoc> {
-public:
-  explicit NestedNameSpecifierLocPrefixMatcher(
-    const Matcher<NestedNameSpecifierLoc> &InnerMatcher)
-    : InnerMatcher(InnerMatcher) {}
-
-  virtual bool matches(const NestedNameSpecifierLoc &Node,
-                       ASTMatchFinder *Finder,
-                       BoundNodesTreeBuilder *Builder) const {
-    NestedNameSpecifierLoc NextNode = Node.getPrefix();
-    if (!NextNode)
-      return false;
-    return InnerMatcher.matches(NextNode, Finder, Builder);
-  }
-
-private:
-  const Matcher<NestedNameSpecifierLoc> InnerMatcher;
-};
-
 /// \brief Matches \c TypeLocs based on an inner matcher matching a certain
 /// \c QualType.
 ///
diff --git a/include/clang/ASTMatchers/ASTMatchersMacros.h b/include/clang/ASTMatchers/ASTMatchersMacros.h
index 953abc2..f5ca26b 100644
--- a/include/clang/ASTMatchers/ASTMatchersMacros.h
+++ b/include/clang/ASTMatchers/ASTMatchersMacros.h
@@ -49,21 +49,23 @@
 ///
 /// The code should return true if 'Node' matches.
 #define AST_MATCHER(Type, DefineMatcher)                                       \
+  AST_MATCHER_OVERLOAD(Type, DefineMatcher, 0)
+
+#define AST_MATCHER_OVERLOAD(Type, DefineMatcher, OverloadId)                  \
   namespace internal {                                                         \
-  class matcher_##DefineMatcher##Matcher                                       \
+  class matcher_##DefineMatcher##OverloadId##Matcher                           \
       : public MatcherInterface<Type> {                                        \
-   public:                                                                     \
-    explicit matcher_##DefineMatcher##Matcher() {}                             \
-    virtual bool matches(                                                      \
-        const Type &Node, ASTMatchFinder *Finder,                              \
-        BoundNodesTreeBuilder *Builder) const;                                 \
+  public:                                                                      \
+    explicit matcher_##DefineMatcher##OverloadId##Matcher() {}                 \
+    virtual bool matches(const Type &Node, ASTMatchFinder *Finder,             \
+                         BoundNodesTreeBuilder *Builder) const;                \
   };                                                                           \
   }                                                                            \
   inline internal::Matcher<Type> DefineMatcher() {                             \
     return internal::makeMatcher(                                              \
-      new internal::matcher_##DefineMatcher##Matcher());                       \
+        new internal::matcher_##DefineMatcher##OverloadId##Matcher());         \
   }                                                                            \
-  inline bool internal::matcher_##DefineMatcher##Matcher::matches(             \
+  inline bool internal::matcher_##DefineMatcher##OverloadId##Matcher::matches( \
       const Type &Node, ASTMatchFinder *Finder,                                \
       BoundNodesTreeBuilder *Builder) const
 
@@ -81,24 +83,29 @@
 ///
 /// The code should return true if 'Node' matches.
 #define AST_MATCHER_P(Type, DefineMatcher, ParamType, Param)                   \
+  AST_MATCHER_P_OVERLOAD(Type, DefineMatcher, ParamType, Param, 0)
+
+#define AST_MATCHER_P_OVERLOAD(Type, DefineMatcher, ParamType, Param,          \
+                               OverloadId)                                     \
   namespace internal {                                                         \
-  class matcher_##DefineMatcher##Matcher                                       \
+  class matcher_##DefineMatcher##OverloadId##Matcher                           \
       : public MatcherInterface<Type> {                                        \
-   public:                                                                     \
-    explicit matcher_##DefineMatcher##Matcher(                                 \
-        const ParamType &A##Param) : Param(A##Param) {}                        \
-    virtual bool matches(                                                      \
-        const Type &Node, ASTMatchFinder *Finder,                              \
-        BoundNodesTreeBuilder *Builder) const;                                 \
-   private:                                                                    \
+  public:                                                                      \
+    explicit matcher_##DefineMatcher##OverloadId##Matcher(                     \
+        const ParamType &A##Param)                                             \
+        : Param(A##Param) {                                                    \
+    }                                                                          \
+    virtual bool matches(const Type &Node, ASTMatchFinder *Finder,             \
+                         BoundNodesTreeBuilder *Builder) const;                \
+  private:                                                                     \
     const ParamType Param;                                                     \
   };                                                                           \
   }                                                                            \
   inline internal::Matcher<Type> DefineMatcher(const ParamType &Param) {       \
     return internal::makeMatcher(                                              \
-      new internal::matcher_##DefineMatcher##Matcher(Param));                  \
+        new internal::matcher_##DefineMatcher##OverloadId##Matcher(Param));    \
   }                                                                            \
-  inline bool internal::matcher_##DefineMatcher##Matcher::matches(             \
+  inline bool internal::matcher_##DefineMatcher##OverloadId##Matcher::matches( \
       const Type &Node, ASTMatchFinder *Finder,                                \
       BoundNodesTreeBuilder *Builder) const
 
@@ -116,33 +123,67 @@
 ///   Builder:               a BoundNodesTreeBuilder*.
 ///
 /// The code should return true if 'Node' matches.
-#define AST_MATCHER_P2(                                                        \
-    Type, DefineMatcher, ParamType1, Param1, ParamType2, Param2)               \
+#define AST_MATCHER_P2(Type, DefineMatcher, ParamType1, Param1, ParamType2,    \
+                       Param2)                                                 \
+  AST_MATCHER_P2_OVERLOAD(Type, DefineMatcher, ParamType1, Param1, ParamType2, \
+                          Param2, 0)
+
+#define AST_MATCHER_P2_OVERLOAD(Type, DefineMatcher, ParamType1, Param1,       \
+                                ParamType2, Param2, OverloadId)                \
   namespace internal {                                                         \
-  class matcher_##DefineMatcher##Matcher                                       \
+  class matcher_##DefineMatcher##OverloadId##Matcher                           \
       : public MatcherInterface<Type> {                                        \
-   public:                                                                     \
-    matcher_##DefineMatcher##Matcher(                                          \
-        const ParamType1 &A##Param1, const ParamType2 &A##Param2)              \
-        : Param1(A##Param1), Param2(A##Param2) {}                              \
-    virtual bool matches(                                                      \
-        const Type &Node, ASTMatchFinder *Finder,                              \
-        BoundNodesTreeBuilder *Builder) const;                                 \
-   private:                                                                    \
+  public:                                                                      \
+    matcher_##DefineMatcher##OverloadId##Matcher(const ParamType1 &A##Param1,  \
+                                                 const ParamType2 &A##Param2)  \
+        : Param1(A##Param1), Param2(A##Param2) {                               \
+    }                                                                          \
+    virtual bool matches(const Type &Node, ASTMatchFinder *Finder,             \
+                         BoundNodesTreeBuilder *Builder) const;                \
+  private:                                                                     \
     const ParamType1 Param1;                                                   \
     const ParamType2 Param2;                                                   \
   };                                                                           \
   }                                                                            \
-  inline internal::Matcher<Type> DefineMatcher(                                \
-      const ParamType1 &Param1, const ParamType2 &Param2) {                    \
+  inline internal::Matcher<Type>                                               \
+  DefineMatcher(const ParamType1 &Param1, const ParamType2 &Param2) {          \
     return internal::makeMatcher(                                              \
-      new internal::matcher_##DefineMatcher##Matcher(                          \
-        Param1, Param2));                                                      \
+        new internal::matcher_##DefineMatcher##OverloadId##Matcher(Param1,     \
+                                                                   Param2));   \
   }                                                                            \
-  inline bool internal::matcher_##DefineMatcher##Matcher::matches(             \
+  inline bool internal::matcher_##DefineMatcher##OverloadId##Matcher::matches( \
       const Type &Node, ASTMatchFinder *Finder,                                \
       BoundNodesTreeBuilder *Builder) const
 
+/// \brief AST_POLYMORPHIC_MATCHER(DefineMatcher) { ... }
+/// defines a single-parameter function named DefineMatcher() that is
+/// polymorphic in the return type.
+///
+/// The variables are the same as for AST_MATCHER, but NodeType will be deduced
+/// from the calling context.
+#define AST_POLYMORPHIC_MATCHER(DefineMatcher)                                 \
+  AST_POLYMORPHIC_MATCHER_OVERLOAD(DefineMatcher, 0)
+
+#define AST_POLYMORPHIC_MATCHER_OVERLOAD(DefineMatcher, OverloadId)            \
+  namespace internal {                                                         \
+  template <typename NodeType>                                                 \
+  class matcher_##DefineMatcher##OverloadId##Matcher                           \
+      : public MatcherInterface<NodeType> {                                    \
+  public:                                                                      \
+    virtual bool matches(const NodeType &Node, ASTMatchFinder *Finder,         \
+                         BoundNodesTreeBuilder *Builder) const;                \
+  };                                                                           \
+  }                                                                            \
+  inline internal::PolymorphicMatcherWithParam0<                               \
+      internal::matcher_##DefineMatcher##OverloadId##Matcher> DefineMatcher() {\
+    return internal::PolymorphicMatcherWithParam0<                             \
+        internal::matcher_##DefineMatcher##OverloadId##Matcher>();             \
+  }                                                                            \
+  template <typename NodeType>                                                 \
+  bool internal::matcher_##DefineMatcher##OverloadId##Matcher<                 \
+      NodeType>::matches(const NodeType &Node, ASTMatchFinder *Finder,         \
+                         BoundNodesTreeBuilder *Builder) const
+
 /// \brief AST_POLYMORPHIC_MATCHER_P(DefineMatcher, ParamType, Param) { ... }
 /// defines a single-parameter function named DefineMatcher() that is
 /// polymorphic in the return type.
@@ -153,32 +194,36 @@
 ///
 /// FIXME: Pull out common code with above macro?
 #define AST_POLYMORPHIC_MATCHER_P(DefineMatcher, ParamType, Param)             \
+  AST_POLYMORPHIC_MATCHER_P_OVERLOAD(DefineMatcher, ParamType, Param, 0)
+
+#define AST_POLYMORPHIC_MATCHER_P_OVERLOAD(DefineMatcher, ParamType, Param,    \
+                                           OverloadId)                         \
   namespace internal {                                                         \
   template <typename NodeType, typename ParamT>                                \
-  class matcher_##DefineMatcher##Matcher                                       \
+  class matcher_##DefineMatcher##OverloadId##Matcher                           \
       : public MatcherInterface<NodeType> {                                    \
-   public:                                                                     \
-    explicit matcher_##DefineMatcher##Matcher(                                 \
-        const ParamType &A##Param) : Param(A##Param) {}                        \
-    virtual bool matches(                                                      \
-        const NodeType &Node, ASTMatchFinder *Finder,                          \
-        BoundNodesTreeBuilder *Builder) const;                                 \
-   private:                                                                    \
+  public:                                                                      \
+    explicit matcher_##DefineMatcher##OverloadId##Matcher(                     \
+        const ParamType &A##Param)                                             \
+        : Param(A##Param) {                                                    \
+    }                                                                          \
+    virtual bool matches(const NodeType &Node, ASTMatchFinder *Finder,         \
+                         BoundNodesTreeBuilder *Builder) const;                \
+  private:                                                                     \
     const ParamType Param;                                                     \
   };                                                                           \
   }                                                                            \
   inline internal::PolymorphicMatcherWithParam1<                               \
-      internal::matcher_##DefineMatcher##Matcher,                              \
-      ParamType >                                                              \
-    DefineMatcher(const ParamType &Param) {                                    \
+      internal::matcher_##DefineMatcher##OverloadId##Matcher, ParamType>       \
+  DefineMatcher(const ParamType &Param) {                                      \
     return internal::PolymorphicMatcherWithParam1<                             \
-        internal::matcher_##DefineMatcher##Matcher,                            \
-        ParamType >(Param);                                                    \
+        internal::matcher_##DefineMatcher##OverloadId##Matcher, ParamType>(    \
+        Param);                                                                \
   }                                                                            \
   template <typename NodeType, typename ParamT>                                \
-  bool internal::matcher_##DefineMatcher##Matcher<NodeType, ParamT>::matches(  \
-      const NodeType &Node, ASTMatchFinder *Finder,                            \
-      BoundNodesTreeBuilder *Builder) const
+  bool internal::matcher_##DefineMatcher##OverloadId##Matcher<                 \
+      NodeType, ParamT>::matches(const NodeType &Node, ASTMatchFinder *Finder, \
+                                 BoundNodesTreeBuilder *Builder) const
 
 /// \brief AST_POLYMORPHIC_MATCHER_P2(
 ///     DefineMatcher, ParamType1, Param1, ParamType2, Param2) { ... }
@@ -188,35 +233,39 @@
 /// The variables are the same as for AST_MATCHER_P2, with the
 /// addition of NodeType, which specifies the node type of the matcher
 /// Matcher<NodeType> returned by the function DefineMatcher().
-#define AST_POLYMORPHIC_MATCHER_P2(                                            \
-      DefineMatcher, ParamType1, Param1, ParamType2, Param2)                   \
+#define AST_POLYMORPHIC_MATCHER_P2(DefineMatcher, ParamType1, Param1,          \
+                                   ParamType2, Param2)                         \
+  AST_POLYMORPHIC_MATCHER_P2_OVERLOAD(DefineMatcher, ParamType1, Param1,       \
+                                      ParamType2, Param2, 0)
+
+#define AST_POLYMORPHIC_MATCHER_P2_OVERLOAD(DefineMatcher, ParamType1, Param1, \
+                                            ParamType2, Param2, OverloadId)    \
   namespace internal {                                                         \
   template <typename NodeType, typename ParamT1, typename ParamT2>             \
-  class matcher_##DefineMatcher##Matcher                                       \
+  class matcher_##DefineMatcher##OverloadId##Matcher                           \
       : public MatcherInterface<NodeType> {                                    \
-   public:                                                                     \
-    matcher_##DefineMatcher##Matcher(                                          \
-        const ParamType1 &A##Param1, const ParamType2 &A##Param2)              \
-        : Param1(A##Param1), Param2(A##Param2) {}                              \
-    virtual bool matches(                                                      \
-        const NodeType &Node, ASTMatchFinder *Finder,                          \
-        BoundNodesTreeBuilder *Builder) const;                                 \
-   private:                                                                    \
+  public:                                                                      \
+    matcher_##DefineMatcher##OverloadId##Matcher(const ParamType1 &A##Param1,  \
+                                                 const ParamType2 &A##Param2)  \
+        : Param1(A##Param1), Param2(A##Param2) {                               \
+    }                                                                          \
+    virtual bool matches(const NodeType &Node, ASTMatchFinder *Finder,         \
+                         BoundNodesTreeBuilder *Builder) const;                \
+  private:                                                                     \
     const ParamType1 Param1;                                                   \
     const ParamType2 Param2;                                                   \
   };                                                                           \
   }                                                                            \
   inline internal::PolymorphicMatcherWithParam2<                               \
-      internal::matcher_##DefineMatcher##Matcher,                              \
-      ParamType1, ParamType2 >                                                 \
-    DefineMatcher(const ParamType1 &Param1, const ParamType2 &Param2) {        \
+      internal::matcher_##DefineMatcher##OverloadId##Matcher, ParamType1,      \
+      ParamType2>                                                              \
+  DefineMatcher(const ParamType1 &Param1, const ParamType2 &Param2) {          \
     return internal::PolymorphicMatcherWithParam2<                             \
-        internal::matcher_##DefineMatcher##Matcher,                            \
-        ParamType1, ParamType2 >(                                              \
-        Param1, Param2);                                                       \
+        internal::matcher_##DefineMatcher##OverloadId##Matcher, ParamType1,    \
+        ParamType2>(Param1, Param2);                                           \
   }                                                                            \
   template <typename NodeType, typename ParamT1, typename ParamT2>             \
-  bool internal::matcher_##DefineMatcher##Matcher<                             \
+  bool internal::matcher_##DefineMatcher##OverloadId##Matcher<                 \
       NodeType, ParamT1, ParamT2>::matches(                                    \
       const NodeType &Node, ASTMatchFinder *Finder,                            \
       BoundNodesTreeBuilder *Builder) const
@@ -224,9 +273,9 @@
 /// \brief Creates a variadic matcher for both a specific \c Type as well as
 /// the corresponding \c TypeLoc.
 #define AST_TYPE_MATCHER(NodeType, MatcherName)                                \
-  const internal::VariadicDynCastAllOfMatcher<Type, NodeType> MatcherName;     \
-  const internal::VariadicDynCastAllOfMatcher<TypeLoc,                         \
-                                              NodeType##Loc> MatcherName##Loc
+  const internal::VariadicDynCastAllOfMatcher<Type, NodeType> MatcherName
+// FIXME: add a matcher for TypeLoc derived classes using its custom casting
+// API (no longer dyn_cast) if/when we need such matching
 
 /// \brief AST_TYPE_TRAVERSE_MATCHER(MatcherName, FunctionName) defines
 /// the matcher \c MatcherName that can be used to traverse from one \c Type
@@ -236,54 +285,61 @@
 /// \c SpecificType::FunctionName. The existance of such a function determines
 /// whether a corresponding matcher can be used on \c SpecificType.
 #define AST_TYPE_TRAVERSE_MATCHER(MatcherName, FunctionName)                   \
-class Polymorphic##MatcherName##TypeMatcher {                                  \
-public:                                                                        \
-  Polymorphic##MatcherName##TypeMatcher(                                       \
-      const internal::Matcher<QualType> &InnerMatcher)                         \
-    : InnerMatcher(InnerMatcher) {}                                            \
-  template <typename T> operator internal::Matcher<T>() {                      \
-    return internal::Matcher<T>(new internal::TypeTraverseMatcher<T>(          \
-      InnerMatcher, &T::FunctionName));                                        \
+  class Polymorphic##MatcherName##TypeMatcher {                                \
+  public:                                                                      \
+    Polymorphic##MatcherName##TypeMatcher(                                     \
+        const internal::Matcher<QualType> &InnerMatcher)                       \
+        : InnerMatcher(InnerMatcher) {                                         \
+    }                                                                          \
+    template <typename T> operator internal:: Matcher< T>() {                  \
+      return internal::Matcher<T>(new internal::TypeTraverseMatcher<T>(        \
+                                          InnerMatcher, &T::FunctionName));    \
+    }                                                                          \
+  private:                                                                     \
+    const internal::Matcher<QualType> InnerMatcher;                            \
   }                                                                            \
-private:                                                                       \
-  const internal::Matcher<QualType> InnerMatcher;                              \
-};                                                                             \
-class Variadic##MatcherName##TypeTraverseMatcher                               \
-    : public llvm::VariadicFunction<                                           \
-        Polymorphic##MatcherName##TypeMatcher,                                 \
-        internal::Matcher<QualType>,                                           \
-        internal::makeTypeAllOfComposite<                                      \
-          Polymorphic##MatcherName##TypeMatcher, QualType> > {                 \
-public:                                                                        \
-  Variadic##MatcherName##TypeTraverseMatcher() {}                              \
-};                                                                             \
-const Variadic##MatcherName##TypeTraverseMatcher MatcherName
+  ;                                                                            \
+  class Variadic##MatcherName##TypeTraverseMatcher                             \
+      : public llvm::VariadicFunction<                                         \
+          Polymorphic##MatcherName##TypeMatcher, internal::Matcher<QualType>,  \
+          internal::makeTypeAllOfComposite<                                    \
+              Polymorphic##MatcherName##TypeMatcher, QualType> > {             \
+  public:                                                                      \
+    Variadic##MatcherName##TypeTraverseMatcher() {                             \
+    }                                                                          \
+  }                                                                            \
+  ;                                                                            \
+  const Variadic##MatcherName##TypeTraverseMatcher MatcherName
 
 /// \brief AST_TYPELOC_TRAVERSE_MATCHER(MatcherName, FunctionName) works
 /// identical to \c AST_TYPE_TRAVERSE_MATCHER but operates on \c TypeLocs.
 #define AST_TYPELOC_TRAVERSE_MATCHER(MatcherName, FunctionName)                \
-class Polymorphic##MatcherName##TypeLocMatcher {                               \
-public:                                                                        \
-  Polymorphic##MatcherName##TypeLocMatcher(                                    \
-      const internal::Matcher<TypeLoc> &InnerMatcher)                          \
-    : InnerMatcher(InnerMatcher) {}                                            \
-  template <typename T> operator internal::Matcher<T>() {                      \
-    return internal::Matcher<T>(new internal::TypeLocTraverseMatcher<T>(       \
-      InnerMatcher, &T::FunctionName##Loc));                                   \
+  class Polymorphic##MatcherName##TypeLocMatcher {                             \
+  public:                                                                      \
+    Polymorphic##MatcherName##TypeLocMatcher(                                  \
+        const internal::Matcher<TypeLoc> &InnerMatcher)                        \
+        : InnerMatcher(InnerMatcher) {                                         \
+    }                                                                          \
+    template <typename T> operator internal:: Matcher< T>() {                  \
+      return internal::Matcher<T>(                                             \
+          new internal::TypeLocTraverseMatcher<T>(InnerMatcher,                \
+                                                  &T::FunctionName##Loc));     \
+    }                                                                          \
+  private:                                                                     \
+    const internal::Matcher<TypeLoc> InnerMatcher;                             \
+  }                                                                            \
+  ;                                                                            \
+  class Variadic##MatcherName##TypeLocTraverseMatcher                          \
+      : public llvm::VariadicFunction<                                         \
+          Polymorphic##MatcherName##TypeLocMatcher, internal::Matcher<TypeLoc>,\
+          internal::makeTypeAllOfComposite<                                    \
+              Polymorphic##MatcherName##TypeLocMatcher, TypeLoc> > {           \
+  public:                                                                      \
+    Variadic##MatcherName##TypeLocTraverseMatcher() {                          \
+    }                                                                          \
   }                                                                            \
-private:                                                                       \
-  const internal::Matcher<TypeLoc> InnerMatcher;                               \
-};                                                                             \
-class Variadic##MatcherName##TypeLocTraverseMatcher                            \
-    : public llvm::VariadicFunction<                                           \
-        Polymorphic##MatcherName##TypeLocMatcher,                              \
-        internal::Matcher<TypeLoc>,                                            \
-        internal::makeTypeAllOfComposite<                                      \
-          Polymorphic##MatcherName##TypeLocMatcher, TypeLoc> > {               \
-public:                                                                        \
-  Variadic##MatcherName##TypeLocTraverseMatcher() {}                           \
-};                                                                             \
-const Variadic##MatcherName##TypeLocTraverseMatcher MatcherName##Loc;          \
-AST_TYPE_TRAVERSE_MATCHER(MatcherName, FunctionName##Type)
+  ;                                                                            \
+  const Variadic##MatcherName##TypeLocTraverseMatcher MatcherName##Loc;        \
+  AST_TYPE_TRAVERSE_MATCHER(MatcherName, FunctionName##Type)
 
 #endif // LLVM_CLANG_AST_MATCHERS_AST_MATCHERS_MACROS_H
diff --git a/include/clang/Analysis/Analyses/Dominators.h b/include/clang/Analysis/Analyses/Dominators.h
index e9a431a..2a806c8 100644
--- a/include/clang/Analysis/Analyses/Dominators.h
+++ b/include/clang/Analysis/Analyses/Dominators.h
@@ -15,12 +15,11 @@
 #define LLVM_CLANG_DOMINATORS_H
 
 #include "clang/Analysis/AnalysisContext.h"
-
-#include "llvm/Module.h"
-#include "llvm/ADT/GraphTraits.h"
 #include "clang/Analysis/CFG.h"
-#include "llvm/Analysis/Dominators.h"
+#include "llvm/ADT/GraphTraits.h"
 #include "llvm/Analysis/DominatorInternals.h"
+#include "llvm/Analysis/Dominators.h"
+#include "llvm/IR/Module.h"
 
 namespace clang {
 
diff --git a/include/clang/Analysis/Analyses/FormatString.h b/include/clang/Analysis/Analyses/FormatString.h
index 5cb9731..4bd989c 100644
--- a/include/clang/Analysis/Analyses/FormatString.h
+++ b/include/clang/Analysis/Analyses/FormatString.h
@@ -201,7 +201,7 @@ public:
 
   bool isPrintfKind() const { return IsPrintf; }
   
-  llvm::Optional<ConversionSpecifier> getStandardSpecifier() const;
+  Optional<ConversionSpecifier> getStandardSpecifier() const;
 
 protected:
   bool IsPrintf;
@@ -361,7 +361,7 @@ public:
 
   bool hasStandardLengthModifier() const;
 
-  llvm::Optional<LengthModifier> getCorrectedLengthModifier() const;
+  Optional<LengthModifier> getCorrectedLengthModifier() const;
 
   bool hasStandardConversionSpecifier(const LangOptions &LangOpt) const;
 
diff --git a/include/clang/Analysis/Analyses/LiveVariables.h b/include/clang/Analysis/Analyses/LiveVariables.h
index c9f39b4..bbd2b02 100644
--- a/include/clang/Analysis/Analyses/LiveVariables.h
+++ b/include/clang/Analysis/Analyses/LiveVariables.h
@@ -14,8 +14,8 @@
 #ifndef LLVM_CLANG_LIVEVARIABLES_H
 #define LLVM_CLANG_LIVEVARIABLES_H
 
-#include "clang/Analysis/AnalysisContext.h"
 #include "clang/AST/Decl.h"
+#include "clang/Analysis/AnalysisContext.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/ImmutableSet.h"
 
diff --git a/include/clang/Analysis/Analyses/ThreadSafety.h b/include/clang/Analysis/Analyses/ThreadSafety.h
index ef6b821..8a888e6 100644
--- a/include/clang/Analysis/Analyses/ThreadSafety.h
+++ b/include/clang/Analysis/Analyses/ThreadSafety.h
@@ -29,24 +29,24 @@ namespace thread_safety {
 /// This enum distinguishes between different kinds of operations that may
 /// need to be protected by locks. We use this enum in error handling.
 enum ProtectedOperationKind {
-  POK_VarDereference, /// Dereferencing a variable (e.g. p in *p = 5;)
-  POK_VarAccess, /// Reading or writing a variable (e.g. x in x = 5;)
-  POK_FunctionCall /// Making a function call (e.g. fool())
+  POK_VarDereference, ///< Dereferencing a variable (e.g. p in *p = 5;)
+  POK_VarAccess, ///< Reading or writing a variable (e.g. x in x = 5;)
+  POK_FunctionCall ///< Making a function call (e.g. fool())
 };
 
 /// This enum distinguishes between different kinds of lock actions. For
 /// example, it is an error to write a variable protected by shared version of a
 /// mutex.
 enum LockKind {
-  LK_Shared, /// Shared/reader lock of a mutex
-  LK_Exclusive /// Exclusive/writer lock of a mutex
+  LK_Shared, ///< Shared/reader lock of a mutex.
+  LK_Exclusive ///< Exclusive/writer lock of a mutex.
 };
 
 /// This enum distinguishes between different ways to access (read or write) a
 /// variable.
 enum AccessKind {
-  AK_Read, /// Reading a variable
-  AK_Written /// Writing a variable
+  AK_Read, ///< Reading a variable.
+  AK_Written ///< Writing a variable.
 };
 
 /// This enum distinguishes between different situations where we warn due to
@@ -67,7 +67,8 @@ enum LockErrorKind {
 /// Handler class for thread safety warnings.
 class ThreadSafetyHandler {
 public:
-  typedef llvm::StringRef Name;
+  typedef StringRef Name;
+  ThreadSafetyHandler() : IssueBetaWarnings(false) { }
   virtual ~ThreadSafetyHandler();
 
   /// Warn about lock expressions which fail to resolve to lockable objects.
@@ -143,6 +144,12 @@ public:
   /// \param Loc -- The location of the function call.
   virtual void handleFunExcludesLock(Name FunName, Name LockName,
                                      SourceLocation Loc) {}
+
+  bool issueBetaWarnings() { return IssueBetaWarnings; }
+  void setIssueBetaWarnings(bool b) { IssueBetaWarnings = b; }
+
+private:
+  bool IssueBetaWarnings;
 };
 
 /// \brief Check a function's CFG for thread-safety violations.
diff --git a/include/clang/Analysis/Analyses/UninitializedValues.h b/include/clang/Analysis/Analyses/UninitializedValues.h
index 45ce4de..e8810c3 100644
--- a/include/clang/Analysis/Analyses/UninitializedValues.h
+++ b/include/clang/Analysis/Analyses/UninitializedValues.h
@@ -15,6 +15,7 @@
 #ifndef LLVM_CLANG_UNINIT_VALS_H
 #define LLVM_CLANG_UNINIT_VALS_H
 
+#include "clang/AST/Stmt.h"
 #include "llvm/ADT/SmallVector.h"
 
 namespace clang {
@@ -42,7 +43,7 @@ private:
 
   /// This use is always uninitialized if it occurs after any of these branches
   /// is taken.
-  llvm::SmallVector<Branch, 2> UninitBranches;
+  SmallVector<Branch, 2> UninitBranches;
 
 public:
   UninitUse(const Expr *User, bool AlwaysUninit) :
@@ -71,7 +72,7 @@ public:
            !branch_empty() ? Sometimes : Maybe;
   }
 
-  typedef llvm::SmallVectorImpl<Branch>::const_iterator branch_iterator;
+  typedef SmallVectorImpl<Branch>::const_iterator branch_iterator;
   /// Branches which inevitably result in the variable being used uninitialized.
   branch_iterator branch_begin() const { return UninitBranches.begin(); }
   branch_iterator branch_end() const { return UninitBranches.end(); }
diff --git a/include/clang/Analysis/AnalysisContext.h b/include/clang/Analysis/AnalysisContext.h
index 5246678..46d7d07 100644
--- a/include/clang/Analysis/AnalysisContext.h
+++ b/include/clang/Analysis/AnalysisContext.h
@@ -18,11 +18,11 @@
 #include "clang/AST/Decl.h"
 #include "clang/AST/Expr.h"
 #include "clang/Analysis/CFG.h"
-#include "llvm/ADT/OwningPtr.h"
-#include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/FoldingSet.h"
+#include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/PointerUnion.h"
-#include "llvm/ADT/DenseMap.h"
 #include "llvm/Support/Allocator.h"
 
 namespace clang {
@@ -133,7 +133,21 @@ public:
   void registerForcedBlockExpression(const Stmt *stmt);
   const CFGBlock *getBlockForRegisteredExpression(const Stmt *stmt);
 
+  /// \brief Get the body of the Declaration.
   Stmt *getBody() const;
+
+  /// \brief Get the body of the Declaration.
+  /// \param[out] IsAutosynthesized Specifies if the body is auto-generated
+  ///             by the BodyFarm.
+  Stmt *getBody(bool &IsAutosynthesized) const;
+
+  /// \brief Checks if the body of the Decl is generated by the BodyFarm.
+  ///
+  /// Note, the lookup is not free. We are going to call getBody behind
+  /// the scenes.
+  /// \sa getBody
+  bool isBodyAutosynthesized() const;
+
   CFG *getCFG();
 
   CFGStmtMap *getCFGStmtMap();
@@ -242,6 +256,8 @@ public:
 
   virtual void Profile(llvm::FoldingSetNodeID &ID) = 0;
 
+  LLVM_ATTRIBUTE_USED void dumpStack() const;
+
 public:
   static void ProfileCommon(llvm::FoldingSetNodeID &ID,
                             ContextKind ck,
@@ -396,7 +412,8 @@ public:
                              bool addImplicitDtors = false,
                              bool addInitializers = false,
                              bool addTemporaryDtors = false,
-                             bool synthesizeBodies = false);
+                             bool synthesizeBodies = false,
+                             bool addStaticInitBranches = false);
 
   ~AnalysisDeclContextManager();
 
diff --git a/include/clang/Analysis/CFG.h b/include/clang/Analysis/CFG.h
index 8cc5d81..ee0be73 100644
--- a/include/clang/Analysis/CFG.h
+++ b/include/clang/Analysis/CFG.h
@@ -15,15 +15,16 @@
 #ifndef LLVM_CLANG_CFG_H
 #define LLVM_CLANG_CFG_H
 
-#include "llvm/ADT/PointerIntPair.h"
-#include "llvm/ADT/GraphTraits.h"
-#include "llvm/Support/Allocator.h"
-#include "llvm/Support/Casting.h"
-#include "llvm/ADT/OwningPtr.h"
-#include "llvm/ADT/DenseMap.h"
 #include "clang/AST/Stmt.h"
 #include "clang/Analysis/Support/BumpVector.h"
 #include "clang/Basic/SourceLocation.h"
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/GraphTraits.h"
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/PointerIntPair.h"
+#include "llvm/Support/Allocator.h"
+#include "llvm/Support/Casting.h"
 #include <bitset>
 #include <cassert>
 #include <iterator>
@@ -48,7 +49,6 @@ class CFGElement {
 public:
   enum Kind {
     // main kind
-    Invalid,
     Statement,
     Initializer,
     // dtor kind
@@ -69,8 +69,31 @@ protected:
     : Data1(const_cast<void*>(Ptr1), ((unsigned) kind) & 0x3),
       Data2(const_cast<void*>(Ptr2), (((unsigned) kind) >> 2) & 0x3) {}
 
-public:
   CFGElement() {}
+public:
+
+  /// \brief Convert to the specified CFGElement type, asserting that this
+  /// CFGElement is of the desired type.
+  template<typename T>
+  T castAs() const {
+    assert(T::isKind(*this));
+    T t;
+    CFGElement& e = t;
+    e = *this;
+    return t;
+  }
+
+  /// \brief Convert to the specified CFGElement type, returning None if this
+  /// CFGElement is not of the desired type.
+  template<typename T>
+  Optional<T> getAs() const {
+    if (!T::isKind(*this))
+      return None;
+    T t;
+    CFGElement& e = t;
+    e = *this;
+    return t;
+  }
 
   Kind getKind() const {
     unsigned x = Data2.getInt();
@@ -78,16 +101,6 @@ public:
     x |= Data1.getInt();
     return (Kind) x;
   }
-
-  bool isValid() const { return getKind() != Invalid; }
-
-  operator bool() const { return isValid(); }
-
-  template<class ElemTy> const ElemTy *getAs() const {
-    if (llvm::isa<ElemTy>(this))
-      return static_cast<const ElemTy*>(this);
-    return 0;
-  }
 };
 
 class CFGStmt : public CFGElement {
@@ -98,8 +111,11 @@ public:
     return static_cast<const Stmt *>(Data1.getPointer());
   }
 
-  static bool classof(const CFGElement *E) {
-    return E->getKind() == Statement;
+private:
+  friend class CFGElement;
+  CFGStmt() {}
+  static bool isKind(const CFGElement &E) {
+    return E.getKind() == Statement;
   }
 };
 
@@ -114,8 +130,11 @@ public:
     return static_cast<CXXCtorInitializer*>(Data1.getPointer());
   }
 
-  static bool classof(const CFGElement *E) {
-    return E->getKind() == Initializer;
+private:
+  friend class CFGElement;
+  CFGInitializer() {}
+  static bool isKind(const CFGElement &E) {
+    return E.getKind() == Initializer;
   }
 };
 
@@ -123,6 +142,7 @@ public:
 /// by compiler on various occasions.
 class CFGImplicitDtor : public CFGElement {
 protected:
+  CFGImplicitDtor() {}
   CFGImplicitDtor(Kind kind, const void *data1, const void *data2 = 0)
     : CFGElement(kind, data1, data2) {
     assert(kind >= DTOR_BEGIN && kind <= DTOR_END);
@@ -132,8 +152,10 @@ public:
   const CXXDestructorDecl *getDestructorDecl(ASTContext &astContext) const;
   bool isNoReturn(ASTContext &astContext) const;
 
-  static bool classof(const CFGElement *E) {
-    Kind kind = E->getKind();
+private:
+  friend class CFGElement;
+  static bool isKind(const CFGElement &E) {
+    Kind kind = E.getKind();
     return kind >= DTOR_BEGIN && kind <= DTOR_END;
   }
 };
@@ -155,8 +177,11 @@ public:
     return static_cast<Stmt*>(Data2.getPointer());
   }
 
-  static bool classof(const CFGElement *elem) {
-    return elem->getKind() == AutomaticObjectDtor;
+private:
+  friend class CFGElement;
+  CFGAutomaticObjDtor() {}
+  static bool isKind(const CFGElement &elem) {
+    return elem.getKind() == AutomaticObjectDtor;
   }
 };
 
@@ -171,8 +196,11 @@ public:
     return static_cast<const CXXBaseSpecifier*>(Data1.getPointer());
   }
 
-  static bool classof(const CFGElement *E) {
-    return E->getKind() == BaseDtor;
+private:
+  friend class CFGElement;
+  CFGBaseDtor() {}
+  static bool isKind(const CFGElement &E) {
+    return E.getKind() == BaseDtor;
   }
 };
 
@@ -187,8 +215,11 @@ public:
     return static_cast<const FieldDecl*>(Data1.getPointer());
   }
 
-  static bool classof(const CFGElement *E) {
-    return E->getKind() == MemberDtor;
+private:
+  friend class CFGElement;
+  CFGMemberDtor() {}
+  static bool isKind(const CFGElement &E) {
+    return E.getKind() == MemberDtor;
   }
 };
 
@@ -203,8 +234,11 @@ public:
     return static_cast<const CXXBindTemporaryExpr *>(Data1.getPointer());
   }
 
-  static bool classof(const CFGElement *E) {
-    return E->getKind() == TemporaryDtor;
+private:
+  friend class CFGElement;
+  CFGTemporaryDtor() {}
+  static bool isKind(const CFGElement &E) {
+    return E.getKind() == TemporaryDtor;
   }
 };
 
@@ -535,7 +569,7 @@ public:
   // the elements beginning at the last position in prepared space.
   iterator beginAutomaticObjDtorsInsert(iterator I, size_t Cnt,
       BumpVectorContext &C) {
-    return iterator(Elements.insert(I.base(), Cnt, CFGElement(), C));
+    return iterator(Elements.insert(I.base(), Cnt, CFGAutomaticObjDtor(0, 0), C));
   }
   iterator insertAutomaticObjDtor(iterator I, VarDecl *VD, Stmt *S) {
     *I = CFGAutomaticObjDtor(VD, S);
@@ -567,6 +601,7 @@ public:
     bool AddInitializers;
     bool AddImplicitDtors;
     bool AddTemporaryDtors;
+    bool AddStaticInitBranches;
 
     bool alwaysAdd(const Stmt *stmt) const {
       return alwaysAddMask[stmt->getStmtClass()];
@@ -587,7 +622,8 @@ public:
       ,AddEHEdges(false)
       ,AddInitializers(false)
       ,AddImplicitDtors(false)
-      ,AddTemporaryDtors(false) {}
+      ,AddTemporaryDtors(false)
+      ,AddStaticInitBranches(false) {}
   };
 
   /// \brief Provides a custom implementation of the iterator class to have the
@@ -718,7 +754,7 @@ public:
     for (const_iterator I=begin(), E=end(); I != E; ++I)
       for (CFGBlock::const_iterator BI=(*I)->begin(), BE=(*I)->end();
            BI != BE; ++BI) {
-        if (const CFGStmt *stmt = BI->getAs<CFGStmt>())
+        if (Optional<CFGStmt> stmt = BI->getAs<CFGStmt>())
           O(const_cast<Stmt*>(stmt->getStmt()));
       }
   }
@@ -807,17 +843,10 @@ namespace llvm {
 
 /// Implement simplify_type for CFGTerminator, so that we can dyn_cast from
 /// CFGTerminator to a specific Stmt class.
-template <> struct simplify_type<const ::clang::CFGTerminator> {
-  typedef const ::clang::Stmt *SimpleType;
-  static SimpleType getSimplifiedValue(const ::clang::CFGTerminator &Val) {
-    return Val.getStmt();
-  }
-};
-
 template <> struct simplify_type< ::clang::CFGTerminator> {
   typedef ::clang::Stmt *SimpleType;
-  static SimpleType getSimplifiedValue(const ::clang::CFGTerminator &Val) {
-    return const_cast<SimpleType>(Val.getStmt());
+  static SimpleType getSimplifiedValue(::clang::CFGTerminator Val) {
+    return Val.getStmt();
   }
 };
 
diff --git a/include/clang/Analysis/CallGraph.h b/include/clang/Analysis/CallGraph.h
index 509de7b..5015eb6 100644
--- a/include/clang/Analysis/CallGraph.h
+++ b/include/clang/Analysis/CallGraph.h
@@ -39,15 +39,9 @@ class CallGraph : public RecursiveASTVisitor<CallGraph> {
   /// FunctionMap owns all CallGraphNodes.
   FunctionMapTy FunctionMap;
 
-  /// This is a virtual root node that has edges to all the global functions -
-  /// 'main' or functions accessible from other translation units.
+  /// This is a virtual root node that has edges to all the functions.
   CallGraphNode *Root;
 
-  /// The list of nodes that have no parent. These are unreachable from Root.
-  /// Declarations can get to this list due to impressions in the graph, for
-  /// example, we do not track functions whose addresses were taken.
-  llvm::SetVector<CallGraphNode *> ParentlessNodes;
-
 public:
   CallGraph();
   ~CallGraph();
@@ -91,34 +85,35 @@ public:
   /// failing to add a call edge due to the analysis imprecision.
   typedef llvm::SetVector<CallGraphNode *>::iterator nodes_iterator;
   typedef llvm::SetVector<CallGraphNode *>::const_iterator const_nodes_iterator;
-  nodes_iterator parentless_begin() { return ParentlessNodes.begin(); }
-  nodes_iterator parentless_end() { return ParentlessNodes.end(); }
-  const_nodes_iterator
-    parentless_begin() const { return ParentlessNodes.begin(); }
-  const_nodes_iterator
-    parentless_end() const { return ParentlessNodes.end(); }
 
   void print(raw_ostream &os) const;
   void dump() const;
   void viewGraph() const;
 
+  void addNodesForBlocks(DeclContext *D);
+
   /// Part of recursive declaration visitation. We recursively visit all the
-  /// Declarations to collect the root functions.
+  /// declarations to collect the root functions.
   bool VisitFunctionDecl(FunctionDecl *FD) {
     // We skip function template definitions, as their semantics is
     // only determined when they are instantiated.
-    if (includeInGraph(FD))
+    if (includeInGraph(FD)) {
+      // Add all blocks declared inside this function to the graph.
+      addNodesForBlocks(FD);
       // If this function has external linkage, anything could call it.
       // Note, we are not precise here. For example, the function could have
       // its address taken.
       addNodeForDecl(FD, FD->isGlobal());
+    }
     return true;
   }
 
   /// Part of recursive declaration visitation.
   bool VisitObjCMethodDecl(ObjCMethodDecl *MD) {
-    if (includeInGraph(MD))
+    if (includeInGraph(MD)) {
+      addNodesForBlocks(MD);
       addNodeForDecl(MD, true);
+    }
     return true;
   }
 
@@ -144,15 +139,13 @@ private:
   Decl *FD;
 
   /// \brief The list of functions called from this node.
-  // Small vector might be more efficient since we are only tracking functions
-  // whose definition is in the current TU.
-  llvm::SmallVector<CallRecord, 5> CalledFunctions;
+  SmallVector<CallRecord, 5> CalledFunctions;
 
 public:
   CallGraphNode(Decl *D) : FD(D) {}
 
-  typedef llvm::SmallVector<CallRecord, 5>::iterator iterator;
-  typedef llvm::SmallVector<CallRecord, 5>::const_iterator const_iterator;
+  typedef SmallVector<CallRecord, 5>::iterator iterator;
+  typedef SmallVector<CallRecord, 5>::const_iterator const_iterator;
 
   /// Iterators through all the callees/children of the node.
   inline iterator begin() { return CalledFunctions.begin(); }
@@ -165,13 +158,10 @@ public:
 
   void addCallee(CallGraphNode *N, CallGraph *CG) {
     CalledFunctions.push_back(N);
-    CG->ParentlessNodes.remove(N);
   }
 
   Decl *getDecl() const { return FD; }
 
-  StringRef getName() const;
-
   void print(raw_ostream &os) const;
   void dump() const;
 };
@@ -203,7 +193,7 @@ template <> struct GraphTraits<const clang::CallGraphNode*> {
   typedef NodeType::const_iterator ChildIteratorType;
   static NodeType *getEntryNode(const clang::CallGraphNode *CGN) { return CGN; }
   static inline ChildIteratorType child_begin(NodeType *N) { return N->begin();}
-  static inline ChildIteratorType child_end  (NodeType *N) { return N->end(); }
+  static inline ChildIteratorType child_end(NodeType *N) { return N->end(); }
 };
 
 template <> struct GraphTraits<clang::CallGraph*>
diff --git a/include/clang/Analysis/FlowSensitive/DataflowSolver.h b/include/clang/Analysis/FlowSensitive/DataflowSolver.h
index 017da63..0f5e7bf 100644
--- a/include/clang/Analysis/FlowSensitive/DataflowSolver.h
+++ b/include/clang/Analysis/FlowSensitive/DataflowSolver.h
@@ -14,12 +14,12 @@
 #ifndef LLVM_CLANG_ANALYSES_DATAFLOW_SOLVER
 #define LLVM_CLANG_ANALYSES_DATAFLOW_SOLVER
 
+#include "functional" // STL
 #include "clang/Analysis/CFG.h"
-#include "clang/Analysis/ProgramPoint.h"
 #include "clang/Analysis/FlowSensitive/DataflowValues.h"
+#include "clang/Analysis/ProgramPoint.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/SmallVector.h"
-#include "functional" // STL
 
 namespace clang {
 
diff --git a/include/clang/Analysis/ProgramPoint.h b/include/clang/Analysis/ProgramPoint.h
index 9479978..333329d 100644
--- a/include/clang/Analysis/ProgramPoint.h
+++ b/include/clang/Analysis/ProgramPoint.h
@@ -17,15 +17,16 @@
 
 #include "clang/Analysis/AnalysisContext.h"
 #include "clang/Analysis/CFG.h"
-#include "llvm/Support/DataTypes.h"
 #include "llvm/ADT/DenseMap.h"
-#include "llvm/ADT/PointerIntPair.h"
 #include "llvm/ADT/FoldingSet.h"
-#include "llvm/Support/Casting.h"
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/PointerIntPair.h"
 #include "llvm/ADT/StringRef.h"
+#include "llvm/Support/Casting.h"
+#include "llvm/Support/DataTypes.h"
 #include <cassert>
-#include <utility>
 #include <string>
+#include <utility>
 
 namespace clang {
 
@@ -71,9 +72,8 @@ private:
 
   llvm::PointerIntPair<const ProgramPointTag *, 2, unsigned> Tag;
 
-  ProgramPoint();
-  
 protected:
+  ProgramPoint() {}
   ProgramPoint(const void *P,
                Kind k,
                const LocationContext *l,
@@ -110,6 +110,29 @@ public:
                         getLocationContext(), tag);
   }
 
+  /// \brief Convert to the specified ProgramPoint type, asserting that this
+  /// ProgramPoint is of the desired type.
+  template<typename T>
+  T castAs() const {
+    assert(T::isKind(*this));
+    T t;
+    ProgramPoint& PP = t;
+    PP = *this;
+    return t;
+  }
+
+  /// \brief Convert to the specified ProgramPoint type, returning None if this
+  /// ProgramPoint is not of the desired type.
+  template<typename T>
+  Optional<T> getAs() const {
+    if (!T::isKind(*this))
+      return None;
+    T t;
+    ProgramPoint& PP = t;
+    PP = *this;
+    return t;
+  }
+
   Kind getKind() const {
     unsigned x = Tag.getInt();
     x <<= 2;
@@ -179,13 +202,16 @@ public:
     return reinterpret_cast<const CFGBlock*>(getData1());
   }
 
-  const CFGElement getFirstElement() const {
+  Optional<CFGElement> getFirstElement() const {
     const CFGBlock *B = getBlock();
-    return B->empty() ? CFGElement() : B->front();
+    return B->empty() ? Optional<CFGElement>() : B->front();
   }
   
-  static bool classof(const ProgramPoint* Location) {
-    return Location->getKind() == BlockEntranceKind;
+private:
+  friend class ProgramPoint;
+  BlockEntrance() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == BlockEntranceKind;
   }
 };
 
@@ -202,8 +228,11 @@ public:
     return getBlock()->getTerminator();
   }
 
-  static bool classof(const ProgramPoint* Location) {
-    return Location->getKind() == BlockExitKind;
+private:
+  friend class ProgramPoint;
+  BlockExit() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == BlockExitKind;
   }
 };
 
@@ -218,10 +247,14 @@ public:
   const Stmt *getStmt() const { return (const Stmt*) getData1(); }
 
   template <typename T>
-  const T* getStmtAs() const { return llvm::dyn_cast<T>(getStmt()); }
+  const T* getStmtAs() const { return dyn_cast<T>(getStmt()); }
 
-  static bool classof(const ProgramPoint* Location) {
-    unsigned k = Location->getKind();
+protected:
+  StmtPoint() {}
+private:
+  friend class ProgramPoint;
+  static bool isKind(const ProgramPoint &Location) {
+    unsigned k = Location.getKind();
     return k >= PreStmtKind && k <= MaxPostStmtKind;
   }
 };
@@ -235,13 +268,17 @@ public:
 
   const Stmt *getSubStmt() const { return (const Stmt*) getData2(); }
 
-  static bool classof(const ProgramPoint* Location) {
-    return Location->getKind() == PreStmtKind;
+private:
+  friend class ProgramPoint;
+  PreStmt() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == PreStmtKind;
   }
 };
 
 class PostStmt : public StmtPoint {
 protected:
+  PostStmt() {}
   PostStmt(const Stmt *S, const void *data, Kind k, const LocationContext *L,
            const ProgramPointTag *tag = 0)
     : StmtPoint(S, data, k, L, tag) {}
@@ -255,8 +292,10 @@ public:
                     const ProgramPointTag *tag = 0)
     : StmtPoint(S, NULL, PostStmtKind, L, tag) {}
 
-  static bool classof(const ProgramPoint* Location) {
-    unsigned k = Location->getKind();
+private:
+  friend class ProgramPoint;
+  static bool isKind(const ProgramPoint &Location) {
+    unsigned k = Location.getKind();
     return k >= MinPostStmtKind && k <= MaxPostStmtKind;
   }
 };
@@ -268,19 +307,25 @@ public:
                 const ProgramPointTag *tag = 0)
     : PostStmt(S, PostConditionKind, L, tag) {}
 
-  static bool classof(const ProgramPoint* Location) {
-    return Location->getKind() == PostConditionKind;
+private:
+  friend class ProgramPoint;
+  PostCondition() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == PostConditionKind;
   }
 };
 
 class LocationCheck : public StmtPoint {
 protected:
+  LocationCheck() {}
   LocationCheck(const Stmt *S, const LocationContext *L,
                 ProgramPoint::Kind K, const ProgramPointTag *tag)
     : StmtPoint(S, NULL, K, L, tag) {}
     
-  static bool classof(const ProgramPoint *location) {
-    unsigned k = location->getKind();
+private:
+  friend class ProgramPoint;
+  static bool isKind(const ProgramPoint &location) {
+    unsigned k = location.getKind();
     return k == PreLoadKind || k == PreStoreKind;
   }
 };
@@ -291,8 +336,11 @@ public:
           const ProgramPointTag *tag = 0)
     : LocationCheck(S, L, PreLoadKind, tag) {}
   
-  static bool classof(const ProgramPoint *location) {
-    return location->getKind() == PreLoadKind;
+private:
+  friend class ProgramPoint;
+  PreLoad() {}
+  static bool isKind(const ProgramPoint &location) {
+    return location.getKind() == PreLoadKind;
   }
 };
 
@@ -302,8 +350,11 @@ public:
            const ProgramPointTag *tag = 0)
   : LocationCheck(S, L, PreStoreKind, tag) {}
   
-  static bool classof(const ProgramPoint *location) {
-    return location->getKind() == PreStoreKind;
+private:
+  friend class ProgramPoint;
+  PreStore() {}
+  static bool isKind(const ProgramPoint &location) {
+    return location.getKind() == PreStoreKind;
   }
 };
 
@@ -313,8 +364,11 @@ public:
            const ProgramPointTag *tag = 0)
     : PostStmt(S, PostLoadKind, L, tag) {}
 
-  static bool classof(const ProgramPoint* Location) {
-    return Location->getKind() == PostLoadKind;
+private:
+  friend class ProgramPoint;
+  PostLoad() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == PostLoadKind;
   }
 };
 
@@ -331,16 +385,18 @@ public:
     setData2(Loc);
   }
 
-  static bool classof(const ProgramPoint* Location) {
-    return Location->getKind() == PostStoreKind;
-  }
-  
   /// \brief Returns the information about the location used in the store,
   /// how it was uttered in the code.
   const void *getLocationValue() const {
     return getData2();
   }
 
+private:
+  friend class ProgramPoint;
+  PostStore() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == PostStoreKind;
+  }
 };
 
 class PostLValue : public PostStmt {
@@ -349,8 +405,11 @@ public:
              const ProgramPointTag *tag = 0)
     : PostStmt(S, PostLValueKind, L, tag) {}
 
-  static bool classof(const ProgramPoint* Location) {
-    return Location->getKind() == PostLValueKind;
+private:
+  friend class ProgramPoint;
+  PostLValue() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == PostLValueKind;
   }
 };
 
@@ -362,8 +421,11 @@ public:
                        const ProgramPointTag *tag = 0)
     : StmtPoint(S, 0, PreStmtPurgeDeadSymbolsKind, L, tag) { }
 
-  static bool classof(const ProgramPoint* Location) {
-    return Location->getKind() == PreStmtPurgeDeadSymbolsKind;
+private:
+  friend class ProgramPoint;
+  PreStmtPurgeDeadSymbols() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == PreStmtPurgeDeadSymbolsKind;
   }
 };
 
@@ -375,8 +437,11 @@ public:
                        const ProgramPointTag *tag = 0)
     : StmtPoint(S, 0, PostStmtPurgeDeadSymbolsKind, L, tag) { }
 
-  static bool classof(const ProgramPoint* Location) {
-    return Location->getKind() == PostStmtPurgeDeadSymbolsKind;
+private:
+  friend class ProgramPoint;
+  PostStmtPurgeDeadSymbols() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == PostStmtPurgeDeadSymbolsKind;
   }
 };
 
@@ -396,19 +461,40 @@ public:
     return static_cast<const CFGBlock*>(getData2());
   }
 
-  static bool classof(const ProgramPoint* Location) {
-    return Location->getKind() == BlockEdgeKind;
+private:
+  friend class ProgramPoint;
+  BlockEdge() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == BlockEdgeKind;
   }
 };
 
 class PostInitializer : public ProgramPoint {
 public:
-  PostInitializer(const CXXCtorInitializer *I, 
+  /// \brief Construct a PostInitializer point that represents a location after
+  ///   CXXCtorInitializer expression evaluation.
+  ///
+  /// \param I The initializer.
+  /// \param Loc The location of the field being initialized.
+  PostInitializer(const CXXCtorInitializer *I,
+                  const void *Loc,
                   const LocationContext *L)
-    : ProgramPoint(I, PostInitializerKind, L) {}
+    : ProgramPoint(I, Loc, PostInitializerKind, L) {}
+
+  const CXXCtorInitializer *getInitializer() const {
+    return static_cast<const CXXCtorInitializer *>(getData1());
+  }
 
-  static bool classof(const ProgramPoint *Location) {
-    return Location->getKind() == PostInitializerKind;
+  /// \brief Returns the location of the field.
+  const void *getLocationValue() const {
+    return getData2();
+  }
+
+private:
+  friend class ProgramPoint;
+  PostInitializer() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == PostInitializerKind;
   }
 };
 
@@ -426,9 +512,13 @@ public:
     return SourceLocation::getFromPtrEncoding(getData1());
   }
 
-  static bool classof(const ProgramPoint *Location) {
-    return Location->getKind() >= MinImplicitCallKind &&
-           Location->getKind() <= MaxImplicitCallKind;
+protected:
+  ImplicitCallPoint() {}
+private:
+  friend class ProgramPoint;
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() >= MinImplicitCallKind &&
+           Location.getKind() <= MaxImplicitCallKind;
   }
 };
 
@@ -441,8 +531,11 @@ public:
                   const LocationContext *L, const ProgramPointTag *Tag = 0)
     : ImplicitCallPoint(D, Loc, PreImplicitCallKind, L, Tag) {}
 
-  static bool classof(const ProgramPoint *Location) {
-    return Location->getKind() == PreImplicitCallKind;
+private:
+  friend class ProgramPoint;
+  PreImplicitCall() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == PreImplicitCallKind;
   }
 };
 
@@ -455,8 +548,11 @@ public:
                    const LocationContext *L, const ProgramPointTag *Tag = 0)
     : ImplicitCallPoint(D, Loc, PostImplicitCallKind, L, Tag) {}
 
-  static bool classof(const ProgramPoint *Location) {
-    return Location->getKind() == PostImplicitCallKind;
+private:
+  friend class ProgramPoint;
+  PostImplicitCall() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == PostImplicitCallKind;
   }
 };
 
@@ -476,8 +572,11 @@ public:
     return static_cast<const StackFrameContext *>(getData2());
   }
 
-  static bool classof(const ProgramPoint *Location) {
-    return Location->getKind() == CallEnterKind;
+private:
+  friend class ProgramPoint;
+  CallEnter() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == CallEnterKind;
   }
 };
 
@@ -496,8 +595,11 @@ public:
   CallExitBegin(const StackFrameContext *L)
     : ProgramPoint(0, CallExitBeginKind, L, 0) {}
 
-  static bool classof(const ProgramPoint *Location) {
-    return Location->getKind() == CallExitBeginKind;
+private:
+  friend class ProgramPoint;
+  CallExitBegin() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == CallExitBeginKind;
   }
 };
 
@@ -514,8 +616,11 @@ public:
     return static_cast<const StackFrameContext *>(getData1());
   }
 
-  static bool classof(const ProgramPoint *Location) {
-    return Location->getKind() == CallExitEndKind;
+private:
+  friend class ProgramPoint;
+  CallExitEnd() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == CallExitEndKind;
   }
 };
 
@@ -529,8 +634,11 @@ public:
 
   const void *getData() const { return getData1(); }
 
-  static bool classof(const ProgramPoint* Location) {
-    return Location->getKind() == EpsilonKind;
+private:
+  friend class ProgramPoint;
+  EpsilonPoint() {}
+  static bool isKind(const ProgramPoint &Location) {
+    return Location.getKind() == EpsilonKind;
   }
 };
 
@@ -544,7 +652,7 @@ public:
   virtual StringRef getTagDescription() const = 0;    
 
 protected:
-  /// Used to implement 'classof' in subclasses.
+  /// Used to implement 'isKind' in subclasses.
   const void *getTagKind() { return TagKind; }
   
 private:
diff --git a/include/clang/Analysis/Support/BlkExprDeclBitVector.h b/include/clang/Analysis/Support/BlkExprDeclBitVector.h
index d25b848..35cc799 100644
--- a/include/clang/Analysis/Support/BlkExprDeclBitVector.h
+++ b/include/clang/Analysis/Support/BlkExprDeclBitVector.h
@@ -17,8 +17,8 @@
 #ifndef LLVM_CLANG_STMTDECLBVDVAL_H
 #define LLVM_CLANG_STMTDECLBVDVAL_H
 
-#include "clang/Analysis/CFG.h"
 #include "clang/AST/Decl.h" // for Decl* -> NamedDecl* conversion
+#include "clang/Analysis/CFG.h"
 #include "llvm/ADT/BitVector.h"
 #include "llvm/ADT/DenseMap.h"
 
diff --git a/include/clang/Analysis/Support/BumpVector.h b/include/clang/Analysis/Support/BumpVector.h
index 83532e6..387e779 100644
--- a/include/clang/Analysis/Support/BumpVector.h
+++ b/include/clang/Analysis/Support/BumpVector.h
@@ -19,9 +19,9 @@
 #ifndef LLVM_CLANG_BUMP_VECTOR
 #define LLVM_CLANG_BUMP_VECTOR
 
-#include "llvm/Support/type_traits.h"
-#include "llvm/Support/Allocator.h"
 #include "llvm/ADT/PointerIntPair.h"
+#include "llvm/Support/Allocator.h"
+#include "llvm/Support/type_traits.h"
 #include <algorithm>
 #include <cstring>
 #include <iterator>
diff --git a/include/clang/Analysis/Visitors/CFGRecStmtDeclVisitor.h b/include/clang/Analysis/Visitors/CFGRecStmtDeclVisitor.h
index c510e20..2bf3eda 100644
--- a/include/clang/Analysis/Visitors/CFGRecStmtDeclVisitor.h
+++ b/include/clang/Analysis/Visitors/CFGRecStmtDeclVisitor.h
@@ -17,10 +17,10 @@
 #ifndef LLVM_CLANG_ANALYSIS_CFG_REC_STMT_DECL_VISITOR_H
 #define LLVM_CLANG_ANALYSIS_CFG_REC_STMT_DECL_VISITOR_H
 
-#include "clang/Analysis/Visitors/CFGRecStmtVisitor.h"
 #include "clang/AST/Decl.h"
-#include "clang/AST/DeclObjC.h"
 #include "clang/AST/DeclCXX.h"
+#include "clang/AST/DeclObjC.h"
+#include "clang/Analysis/Visitors/CFGRecStmtVisitor.h"
 
 #define DISPATCH_CASE(CLASS)                                  \
 case Decl::CLASS:                                             \
@@ -63,6 +63,7 @@ public:
         DISPATCH_CASE(ImplicitParam)
         DISPATCH_CASE(EnumConstant)
         DISPATCH_CASE(Typedef)
+        DISPATCH_CASE(TypeAlias)
         DISPATCH_CASE(Record)    // FIXME: Refine.  VisitStructDecl?
         DISPATCH_CASE(CXXRecord)
         DISPATCH_CASE(Enum)
@@ -82,6 +83,7 @@ public:
   DEFAULT_DISPATCH(ImplicitParam)
   DEFAULT_DISPATCH(EnumConstant)
   DEFAULT_DISPATCH(Typedef)
+  DEFAULT_DISPATCH(TypeAlias)
   DEFAULT_DISPATCH(Record)
   DEFAULT_DISPATCH(Enum)
   DEFAULT_DISPATCH(Field)
diff --git a/include/clang/Basic/Attr.td b/include/clang/Basic/Attr.td
index bfe8093..37aa332 100644
--- a/include/clang/Basic/Attr.td
+++ b/include/clang/Basic/Attr.td
@@ -29,8 +29,8 @@ class SubsetSubject<AttrSubject base, string description, code check>
   code CheckCode = check;
 }
 
-// This is the type of a variable which C++0x defines [[aligned()]] as being
-// a possible subject.
+// This is the type of a variable which C++11 allows alignas(...) to appertain
+// to.
 def NormalVar : SubsetSubject<Var, "non-register, non-parameter variable",
                               [{S->getStorageClass() != VarDecl::Register &&
                                 S->getKind() != Decl::ImplicitParam &&
@@ -91,6 +91,12 @@ class Declspec<string name> : Spelling<name, "Declspec">;
 class CXX11<string namespace, string name> : Spelling<name, "CXX11"> {
   string Namespace = namespace;
 }
+class Keyword<string name> : Spelling<name, "Keyword">;
+
+class Accessor<string name, list<Spelling> spellings> {
+  string Name = name;
+  list<Spelling> Spellings = spellings;
+}
 
 class Attr {
   // The various ways in which an attribute can be spelled in source
@@ -99,8 +105,10 @@ class Attr {
   list<AttrSubject> Subjects;
   // The arguments allowed on an attribute
   list<Argument> Args = [];
-  // Set to true for attributes with arguments which require delayed parsing. 
-  bit LateParsed = 0;  
+  // Accessors which should be generated for the attribute.
+  list<Accessor> Accessors = [];
+  // Set to true for attributes with arguments which require delayed parsing.
+  bit LateParsed = 0;
   // Set to false to prevent an attribute from being propagated from a template
   // to the instantiation.
   bit Clone = 1;
@@ -114,7 +122,7 @@ class Attr {
   bit Ignored = 0;
   // Set to true if each of the spellings is a distinct attribute.
   bit DistinctSpellings = 0;
-  // Any additional text that should be included verbatim in the class.  
+  // Any additional text that should be included verbatim in the class.
   code AdditionalMembers = [{}];
 }
 
@@ -125,6 +133,13 @@ class InheritableAttr : Attr;
 /// redeclarations, even when it's written on a parameter.
 class InheritableParamAttr : InheritableAttr;
 
+/// An ignored attribute, which we parse but discard with no checking.
+class IgnoredAttr : Attr {
+  let Ignored = 1;
+  let ASTNode = 0;
+  let SemaHandler = 0;
+}
+
 //
 // Attributes begin here
 //
@@ -132,18 +147,24 @@ class InheritableParamAttr : InheritableAttr;
 def AddressSpace : Attr {
   let Spellings = [GNU<"address_space">];
   let Args = [IntArgument<"AddressSpace">];
-  let ASTNode = 0;  
+  let ASTNode = 0;
 }
 
 def Alias : InheritableAttr {
-  let Spellings = [GNU<"alias">];
+  let Spellings = [GNU<"alias">, CXX11<"gnu", "alias">];
   let Args = [StringArgument<"Aliasee">];
 }
 
 def Aligned : InheritableAttr {
-  let Spellings = [GNU<"aligned">, GNU<"align">];
+  let Spellings = [GNU<"aligned">, Declspec<"align">, CXX11<"gnu", "aligned">,
+                   Keyword<"alignas">, Keyword<"_Alignas">];
   let Subjects = [NonBitField, NormalVar, Tag];
-  let Args = [AlignedArgument<"Alignment">, BoolArgument<"IsMSDeclSpec">];
+  let Args = [AlignedArgument<"Alignment">];
+  let Accessors = [Accessor<"isGNU", [GNU<"aligned">, CXX11<"gnu","aligned">]>,
+                   Accessor<"isC11", [Keyword<"_Alignas">]>,
+                   Accessor<"isAlignas", [Keyword<"alignas">,
+                                          Keyword<"_Alignas">]>,
+                   Accessor<"isDeclspec",[Declspec<"align">]>];
 }
 
 def AlignMac68k : InheritableAttr {
@@ -152,16 +173,16 @@ def AlignMac68k : InheritableAttr {
 }
 
 def AllocSize : Attr {
-  let Spellings = [GNU<"alloc_size">];
+  let Spellings = [GNU<"alloc_size">, CXX11<"gnu", "alloc_size">];
   let Args = [VariadicUnsignedArgument<"Args">];
 }
 
 def AlwaysInline : InheritableAttr {
-  let Spellings = [GNU<"always_inline">];
+  let Spellings = [GNU<"always_inline">, CXX11<"gnu", "always_inline">];
 }
 
 def TLSModel : InheritableAttr {
-  let Spellings = [GNU<"tls_model">];
+  let Spellings = [GNU<"tls_model">, CXX11<"gnu", "tls_model">];
   let Subjects = [Var];
   let Args = [StringArgument<"Model">];
 }
@@ -200,11 +221,8 @@ def Blocks : InheritableAttr {
   let Args = [EnumArgument<"Type", "BlockType", ["byref"], ["ByRef"]>];
 }
 
-def Bounded : Attr {
+def Bounded : IgnoredAttr {
   let Spellings = [GNU<"bounded">];
-  let ASTNode = 0;
-  let SemaHandler = 0;
-  let Ignored = 1;
 }
 
 def CarriesDependency : InheritableParamAttr {
@@ -214,7 +232,8 @@ def CarriesDependency : InheritableParamAttr {
 }
 
 def CDecl : InheritableAttr {
-  let Spellings = [GNU<"cdecl">, GNU<"__cdecl">];
+  let Spellings = [GNU<"cdecl">, CXX11<"gnu", "cdecl">, Keyword<"__cdecl">,
+                   Keyword<"_cdecl">];
 }
 
 // cf_audited_transfer indicates that the given function has been
@@ -234,11 +253,6 @@ def CFUnknownTransfer : InheritableAttr {
   let Subjects = [Function];
 }
 
-def CFReturnsAutoreleased : Attr {
-  let Spellings = [GNU<"cf_returns_autoreleased">];
-  let ASTNode = 0;
-}
-
 def CFReturnsRetained : InheritableAttr {
   let Spellings = [GNU<"cf_returns_retained">];
   let Subjects = [ObjCMethod, Function];
@@ -255,24 +269,24 @@ def CFConsumed : InheritableParamAttr {
 }
 
 def Cleanup : InheritableAttr {
-  let Spellings = [GNU<"cleanup">];
+  let Spellings = [GNU<"cleanup">, CXX11<"gnu", "cleanup">];
   let Args = [FunctionArgument<"FunctionDecl">];
 }
 
 def Cold : InheritableAttr {
-  let Spellings = [GNU<"cold">];
+  let Spellings = [GNU<"cold">, CXX11<"gnu", "cold">];
 }
 
 def Common : InheritableAttr {
-  let Spellings = [GNU<"common">];
+  let Spellings = [GNU<"common">, CXX11<"gnu", "common">];
 }
 
 def Const : InheritableAttr {
-  let Spellings = [GNU<"const">, GNU<"__const">];
+  let Spellings = [GNU<"const">, GNU<"__const">, CXX11<"gnu", "const">];
 }
 
 def Constructor : InheritableAttr {
-  let Spellings = [GNU<"constructor">];
+  let Spellings = [GNU<"constructor">, CXX11<"gnu", "constructor">];
   let Args = [IntArgument<"Priority">];
 }
 
@@ -301,23 +315,33 @@ def CUDAShared : InheritableAttr {
   let Spellings = [GNU<"shared">];
 }
 
+def C11NoReturn : InheritableAttr {
+  let Spellings = [Keyword<"_Noreturn">];
+  let Subjects = [Function];
+  let SemaHandler = 0;
+}
+
+def CXX11NoReturn : InheritableAttr {
+  let Spellings = [CXX11<"","noreturn">, CXX11<"std","noreturn">];
+  let Subjects = [Function];
+}
+
 def OpenCLKernel : Attr {
-  let Spellings = [GNU<"opencl_kernel_function">];
+  let Spellings = [Keyword<"__kernel">, Keyword<"kernel">];
 }
 
 def OpenCLImageAccess : Attr {
   let Spellings = [GNU<"opencl_image_access">];
   let Args = [IntArgument<"Access">];
-  let ASTNode = 0;
 }
 
 def Deprecated : InheritableAttr {
-  let Spellings = [GNU<"deprecated">];
+  let Spellings = [GNU<"deprecated">, CXX11<"gnu", "deprecated">];
   let Args = [StringArgument<"Message">];
 }
 
 def Destructor : InheritableAttr {
-  let Spellings = [GNU<"destructor">];
+  let Spellings = [GNU<"destructor">, CXX11<"gnu", "destructor">];
   let Args = [IntArgument<"Priority">];
 }
 
@@ -328,12 +352,13 @@ def ExtVectorType : Attr {
 }
 
 def FallThrough : Attr {
-  let Spellings = [CXX11<"clang","fallthrough">];
+  let Spellings = [CXX11<"clang", "fallthrough">];
   let Subjects = [NullStmt];
 }
 
 def FastCall : InheritableAttr {
-  let Spellings = [GNU<"fastcall">, GNU<"__fastcall">];
+  let Spellings = [GNU<"fastcall">, CXX11<"gnu", "fastcall">,
+                   Keyword<"__fastcall">, Keyword<"_fastcall">];
 }
 
 def Final : InheritableAttr {
@@ -347,22 +372,22 @@ def MinSize : InheritableAttr {
 }
 
 def Format : InheritableAttr {
-  let Spellings = [GNU<"format">];
+  let Spellings = [GNU<"format">, CXX11<"gnu", "format">];
   let Args = [StringArgument<"Type">, IntArgument<"FormatIdx">,
               IntArgument<"FirstArg">];
 }
 
 def FormatArg : InheritableAttr {
-  let Spellings = [GNU<"format_arg">];
+  let Spellings = [GNU<"format_arg">, CXX11<"gnu", "format_arg">];
   let Args = [IntArgument<"FormatIdx">];
 }
 
 def GNUInline : InheritableAttr {
-  let Spellings = [GNU<"gnu_inline">];
+  let Spellings = [GNU<"gnu_inline">, CXX11<"gnu", "gnu_inline">];
 }
 
 def Hot : InheritableAttr {
-  let Spellings = [GNU<"hot">];
+  let Spellings = [GNU<"hot">, CXX11<"gnu", "hot">];
 }
 
 def IBAction : InheritableAttr {
@@ -379,7 +404,7 @@ def IBOutletCollection : InheritableAttr {
 }
 
 def Malloc : InheritableAttr {
-  let Spellings = [GNU<"malloc">];
+  let Spellings = [GNU<"malloc">, CXX11<"gnu", "malloc">];
 }
 
 def MaxFieldAlignment : InheritableAttr {
@@ -389,7 +414,7 @@ def MaxFieldAlignment : InheritableAttr {
 }
 
 def MayAlias : InheritableAttr {
-  let Spellings = [GNU<"may_alias">];
+  let Spellings = [GNU<"may_alias">, CXX11<"gnu", "may_alias">];
 }
 
 def MSP430Interrupt : InheritableAttr {
@@ -408,14 +433,19 @@ def MBlazeSaveVolatiles : InheritableAttr {
   let SemaHandler = 0;
 }
 
+def Mips16 : InheritableAttr {
+  let Spellings = [GNU<"mips16">, CXX11<"gnu", "mips16">];
+  let Subjects = [Function];
+}
+
 def Mode : Attr {
-  let Spellings = [GNU<"mode">];
+  let Spellings = [GNU<"mode">, CXX11<"gnu", "mode">];
   let Args = [IdentifierArgument<"Mode">];
   let ASTNode = 0;
 }
 
 def Naked : InheritableAttr {
-  let Spellings = [GNU<"naked">];
+  let Spellings = [GNU<"naked">, CXX11<"gnu", "naked">];
 }
 
 def NeonPolyVectorType : Attr {
@@ -431,11 +461,11 @@ def NeonVectorType : Attr {
 }
 
 def ReturnsTwice : InheritableAttr {
-  let Spellings = [GNU<"returns_twice">];
+  let Spellings = [GNU<"returns_twice">, CXX11<"gnu", "returns_twice">];
 }
 
 def NoCommon : InheritableAttr {
-  let Spellings = [GNU<"nocommon">];
+  let Spellings = [GNU<"nocommon">, CXX11<"gnu", "nocommon">];
 }
 
 def NoDebug : InheritableAttr {
@@ -443,11 +473,16 @@ def NoDebug : InheritableAttr {
 }
 
 def NoInline : InheritableAttr {
-  let Spellings = [GNU<"noinline">];
+  let Spellings = [GNU<"noinline">, CXX11<"gnu", "noinline">];
+}
+
+def NoMips16 : InheritableAttr {
+  let Spellings = [GNU<"nomips16">, CXX11<"gnu", "nomips16">];
+  let Subjects = [Function];
 }
 
 def NonNull : InheritableAttr {
-  let Spellings = [GNU<"nonnull">];
+  let Spellings = [GNU<"nonnull">, CXX11<"gnu", "nonnull">];
   let Args = [VariadicUnsignedArgument<"Args">];
   let AdditionalMembers =
 [{bool isNonNull(unsigned idx) const {
@@ -460,19 +495,19 @@ def NonNull : InheritableAttr {
 }
 
 def NoReturn : InheritableAttr {
-  let Spellings = [GNU<"noreturn">, CXX11<"","noreturn">,
-                   CXX11<"std","noreturn">];
+  let Spellings = [GNU<"noreturn">, CXX11<"gnu", "noreturn">];
   // FIXME: Does GCC allow this on the function instead?
   let Subjects = [Function];
 }
 
 def NoInstrumentFunction : InheritableAttr {
-  let Spellings = [GNU<"no_instrument_function">];
+  let Spellings = [GNU<"no_instrument_function">,
+                   CXX11<"gnu", "no_instrument_function">];
   let Subjects = [Function];
 }
 
 def NoThrow : InheritableAttr {
-  let Spellings = [GNU<"nothrow">];
+  let Spellings = [GNU<"nothrow">, CXX11<"gnu", "nothrow">];
 }
 
 def NSBridged : InheritableAttr {
@@ -563,26 +598,30 @@ def Ownership : InheritableAttr {
 }
 
 def Packed : InheritableAttr {
-  let Spellings = [GNU<"packed">];
+  let Spellings = [GNU<"packed">, CXX11<"gnu", "packed">];
 }
 
 def PnaclCall : InheritableAttr {
   let Spellings = [GNU<"pnaclcall">];
 }
 
+def IntelOclBicc : InheritableAttr {
+  let Spellings = [GNU<"intel_ocl_bicc">];
+}
+
 def Pcs : InheritableAttr {
-  let Spellings = [GNU<"pcs">];
+  let Spellings = [GNU<"pcs">, CXX11<"gnu", "pcs">];
   let Args = [EnumArgument<"PCS", "PCSType",
                            ["aapcs", "aapcs-vfp"],
                            ["AAPCS", "AAPCS_VFP"]>];
 }
 
 def Pure : InheritableAttr {
-  let Spellings = [GNU<"pure">];
+  let Spellings = [GNU<"pure">, CXX11<"gnu", "pure">];
 }
 
 def Regparm : InheritableAttr {
-  let Spellings = [GNU<"regparm">];
+  let Spellings = [GNU<"regparm">, CXX11<"gnu", "regparm">];
   let Args = [UnsignedArgument<"NumParams">];
 }
 
@@ -592,6 +631,11 @@ def ReqdWorkGroupSize : InheritableAttr {
               UnsignedArgument<"ZDim">];
 }
 
+def Endian : InheritableAttr {
+  let Spellings = [GNU<"endian">];
+  let Args = [IdentifierArgument<"platform">];
+}
+
 def WorkGroupSizeHint :  InheritableAttr {
   let Spellings = [GNU<"work_group_size_hint">];
   let Args = [UnsignedArgument<"XDim">, 
@@ -605,30 +649,32 @@ def InitPriority : InheritableAttr {
 }
 
 def Section : InheritableAttr {
-  let Spellings = [GNU<"section">];
+  let Spellings = [GNU<"section">, CXX11<"gnu", "section">];
   let Args = [StringArgument<"Name">];
 }
 
 def Sentinel : InheritableAttr {
-  let Spellings = [GNU<"sentinel">];
+  let Spellings = [GNU<"sentinel">, CXX11<"gnu", "sentinel">];
   let Args = [DefaultIntArgument<"Sentinel", 0>,
               DefaultIntArgument<"NullPos", 0>];
 }
 
 def StdCall : InheritableAttr {
-  let Spellings = [GNU<"stdcall">, GNU<"__stdcall">];
+  let Spellings = [GNU<"stdcall">, CXX11<"gnu", "stdcall">,
+                   Keyword<"__stdcall">, Keyword<"_stdcall">];
 }
 
 def ThisCall : InheritableAttr {
-  let Spellings = [GNU<"thiscall">, GNU<"__thiscall">];
+  let Spellings = [GNU<"thiscall">, CXX11<"gnu", "thiscall">,
+                   Keyword<"__thiscall">, Keyword<"_thiscall">];
 }
 
 def Pascal : InheritableAttr {
-  let Spellings = [GNU<"pascal">];
+  let Spellings = [GNU<"pascal">, Keyword<"__pascal">, Keyword<"_pascal">];
 }
 
 def TransparentUnion : InheritableAttr {
-  let Spellings = [GNU<"transparent_union">];
+  let Spellings = [GNU<"transparent_union">, CXX11<"gnu", "transparent_union">];
 }
 
 def Unavailable : InheritableAttr {
@@ -659,11 +705,11 @@ def ObjCRequiresPropertyDefs : InheritableAttr {
 }
 
 def Unused : InheritableAttr {
-  let Spellings = [GNU<"unused">];
+  let Spellings = [GNU<"unused">, CXX11<"gnu", "unused">];
 }
 
 def Used : InheritableAttr {
-  let Spellings = [GNU<"used">];
+  let Spellings = [GNU<"used">, CXX11<"gnu", "used">];
 }
 
 def Uuid : InheritableAttr {
@@ -673,21 +719,27 @@ def Uuid : InheritableAttr {
 }
 
 def VectorSize : Attr {
-  let Spellings = [GNU<"vector_size">];
+  let Spellings = [GNU<"vector_size">, CXX11<"gnu", "vector_size">];
   let Args = [ExprArgument<"NumBytes">];
   let ASTNode = 0;
 }
 
-def VecTypeHint : Attr {
+def VecTypeHint : InheritableAttr {
   let Spellings = [GNU<"vec_type_hint">];
-  let ASTNode = 0;
-  let SemaHandler = 0;
-  let Ignored = 1;
+  let Args = [TypeArgument<"TypeHint">, SourceLocArgument<"TypeLoc">];
 }
 
 def Visibility : InheritableAttr {
   let Clone = 0;
-  let Spellings = [GNU<"visibility">];
+  let Spellings = [GNU<"visibility">, CXX11<"gnu", "visibility">];
+  let Args = [EnumArgument<"Visibility", "VisibilityType",
+                           ["default", "hidden", "internal", "protected"],
+                           ["Default", "Hidden", "Hidden", "Protected"]>];
+}
+
+def TypeVisibility : InheritableAttr {
+  let Clone = 0;
+  let Spellings = [GNU<"type_visibility">, CXX11<"clang", "type_visibility">];
   let Args = [EnumArgument<"Visibility", "VisibilityType",
                            ["default", "hidden", "internal", "protected"],
                            ["Default", "Hidden", "Hidden", "Protected"]>];
@@ -699,11 +751,13 @@ def VecReturn : InheritableAttr {
 }
 
 def WarnUnusedResult : InheritableAttr {
-  let Spellings = [GNU<"warn_unused_result">];
+  let Spellings = [GNU<"warn_unused_result">,
+                   CXX11<"clang", "warn_unused_result">,
+                   CXX11<"gnu", "warn_unused_result">];
 }
 
 def Weak : InheritableAttr {
-  let Spellings = [GNU<"weak">];
+  let Spellings = [GNU<"weak">, CXX11<"gnu", "weak">];
 }
 
 def WeakImport : InheritableAttr {
@@ -711,16 +765,27 @@ def WeakImport : InheritableAttr {
 }
 
 def WeakRef : InheritableAttr {
-  let Spellings = [GNU<"weakref">];
+  let Spellings = [GNU<"weakref">, CXX11<"gnu", "weakref">];
 }
 
 def X86ForceAlignArgPointer : InheritableAttr {
   let Spellings = [];
 }
 
-// AddressSafety attribute (e.g. for AddressSanitizer)
-def NoAddressSafetyAnalysis : InheritableAttr {
-  let Spellings = [GNU<"no_address_safety_analysis">];
+// Attribute to disable AddressSanitizer (or equivalent) checks.
+def NoSanitizeAddress : InheritableAttr {
+  let Spellings = [GNU<"no_address_safety_analysis">,
+                   GNU<"no_sanitize_address">];
+}
+
+// Attribute to disable ThreadSanitizer checks.
+def NoSanitizeThread : InheritableAttr {
+  let Spellings = [GNU<"no_sanitize_thread">];
+}
+
+// Attribute to disable MemorySanitizer checks.
+def NoSanitizeMemory : InheritableAttr {
+  let Spellings = [GNU<"no_sanitize_memory">];
 }
 
 // C/C++ Thread safety attributes (e.g. for deadlock, data race checking)
@@ -876,29 +941,41 @@ def DLLImport : InheritableAttr {
 }
 
 def ForceInline : InheritableAttr {
-  let Spellings = [Declspec<"__forceinline">];
+  let Spellings = [Keyword<"__forceinline">];
 }
 
 def Win64 : InheritableAttr {
-  let Spellings = [Declspec<"w64">];
+  let Spellings = [Keyword<"__w64">];
 }
 
 def Ptr32 : InheritableAttr {
-  let Spellings = [Declspec<"__ptr32">];
+  let Spellings = [Keyword<"__ptr32">];
 }
 
 def Ptr64 : InheritableAttr {
-  let Spellings = [Declspec<"__ptr64">];
+  let Spellings = [Keyword<"__ptr64">];
 }
 
-def SingleInheritance : InheritableAttr {
-  let Spellings = [Declspec<"__single_inheritance">];
+class MSInheritanceAttr : InheritableAttr;
+
+def SingleInheritance : MSInheritanceAttr {
+  let Spellings = [Keyword<"__single_inheritance">];
+}
+
+def MultipleInheritance : MSInheritanceAttr {
+  let Spellings = [Keyword<"__multiple_inheritance">];
 }
 
-def MultipleInheritance : InheritableAttr {
-  let Spellings = [Declspec<"__multiple_inheritance">];
+def VirtualInheritance : MSInheritanceAttr {
+  let Spellings = [Keyword<"__virtual_inheritance">];
+}
+
+// This attribute doesn't have any spellings, but we can apply it implicitly to
+// incomplete types that lack any of the other attributes.
+def UnspecifiedInheritance : MSInheritanceAttr {
+  let Spellings = [];
 }
 
-def VirtualInheritance : InheritableAttr {
-  let Spellings = [Declspec<"__virtual_inheritance">];
+def Unaligned : IgnoredAttr {
+  let Spellings = [Keyword<"__unaligned">];
 }
diff --git a/include/clang/Basic/AttrKinds.h b/include/clang/Basic/AttrKinds.h
index 150a30e..bd090ec 100644
--- a/include/clang/Basic/AttrKinds.h
+++ b/include/clang/Basic/AttrKinds.h
@@ -24,6 +24,7 @@ enum Kind {
 #define ATTR(X) X,
 #define LAST_INHERITABLE_ATTR(X) X, LAST_INHERITABLE = X,
 #define LAST_INHERITABLE_PARAM_ATTR(X) X, LAST_INHERITABLE_PARAM = X,
+#define LAST_MS_INHERITABLE_ATTR(X) X, LAST_MS_INHERITABLE = X,
 #include "clang/Basic/AttrList.inc"
   NUM_ATTRS
 };
diff --git a/include/clang/Basic/Builtins.def b/include/clang/Basic/Builtins.def
index d48eadc..0a513ef 100644
--- a/include/clang/Basic/Builtins.def
+++ b/include/clang/Basic/Builtins.def
@@ -31,6 +31,7 @@
 //  F -> constant CFString
 //  G -> id
 //  H -> SEL
+//  M -> struct objc_super
 //  a -> __builtin_va_list
 //  A -> "reference" to __builtin_va_list
 //  V -> Vector, followed by the number of elements and the base type.
@@ -81,6 +82,7 @@
 //          through an ellipsis
 //  e -> const, but only when -fmath-errno=0
 //  j -> returns_twice (like setjmp)
+//  u -> arguments are not evaluated for their side-effects
 //  FIXME: gcc has nonnull
 
 #if defined(BUILTIN) && !defined(LIBBUILTIN)
@@ -394,8 +396,8 @@ BUILTIN(__builtin_bswap32, "UiUi", "nc")
 BUILTIN(__builtin_bswap64, "ULLiULLi", "nc")
 
 // Random GCC builtins
-BUILTIN(__builtin_constant_p, "i.", "nct")
-BUILTIN(__builtin_classify_type, "i.", "nct")
+BUILTIN(__builtin_constant_p, "i.", "nctu")
+BUILTIN(__builtin_classify_type, "i.", "nctu")
 BUILTIN(__builtin___CFStringMakeConstantString, "FC*cC*", "nc")
 BUILTIN(__builtin___NSStringMakeConstantString, "FC*cC*", "nc")
 BUILTIN(__builtin_va_start, "vA.", "nt")
@@ -453,17 +455,17 @@ BUILTIN(__builtin_dwarf_sp_column, "Ui", "n")
 BUILTIN(__builtin_extend_pointer, "ULLiv*", "n") // _Unwind_Word == uint64_t
 
 // GCC Object size checking builtins
-BUILTIN(__builtin_object_size, "zvC*i", "n")
+BUILTIN(__builtin_object_size, "zvC*i", "nu")
 BUILTIN(__builtin___memcpy_chk, "v*v*vC*zz", "nF")
-BUILTIN(__builtin___memccpy_chk, "v*v*vC*iz", "nF")
+BUILTIN(__builtin___memccpy_chk, "v*v*vC*izz", "nF")
 BUILTIN(__builtin___memmove_chk, "v*v*vC*zz", "nF")
 BUILTIN(__builtin___mempcpy_chk, "v*v*vC*zz", "nF")
 BUILTIN(__builtin___memset_chk, "v*v*izz", "nF")
 BUILTIN(__builtin___stpcpy_chk, "c*c*cC*z", "nF")
 BUILTIN(__builtin___strcat_chk, "c*c*cC*z", "nF")
 BUILTIN(__builtin___strcpy_chk, "c*c*cC*z", "nF")
-BUILTIN(__builtin___strlcat_chk, "c*c*cC*zz", "nF")
-BUILTIN(__builtin___strlcpy_chk, "c*c*cC*zz", "nF")
+BUILTIN(__builtin___strlcat_chk, "zc*cC*zz", "nF")
+BUILTIN(__builtin___strlcpy_chk, "zc*cC*zz", "nF")
 BUILTIN(__builtin___strncat_chk, "c*c*cC*zz", "nF")
 BUILTIN(__builtin___strncpy_chk, "c*c*cC*zz", "nF")
 BUILTIN(__builtin___stpncpy_chk, "c*c*cC*zz", "nF")
@@ -760,17 +762,16 @@ LIBBUILTIN(strlcpy, "zc*cC*z",    "f",     "string.h", ALL_LANGUAGES)
 LIBBUILTIN(strlcat, "zc*cC*z",    "f",     "string.h", ALL_LANGUAGES)
 //   id objc_msgSend(id, SEL, ...)
 LIBBUILTIN(objc_msgSend, "GGH.",   "f",     "objc/message.h", OBJC_LANG)
-
 // long double objc_msgSend_fpret(id self, SEL op, ...) 
 LIBBUILTIN(objc_msgSend_fpret, "LdGH.", "f", "objc/message.h", OBJC_LANG)
 // _Complex long double objc_msgSend_fp2ret(id self, SEL op, ...)
 LIBBUILTIN(objc_msgSend_fp2ret, "XLdGH.", "f", "objc/message.h", OBJC_LANG)
-// id objc_msgSend_stret (id, SEL, ...)
-LIBBUILTIN(objc_msgSend_stret, "GGH.", "f", "objc/message.h", OBJC_LANG)
+// void objc_msgSend_stret (id, SEL, ...)
+LIBBUILTIN(objc_msgSend_stret, "vGH.", "f", "objc/message.h", OBJC_LANG)
 // id objc_msgSendSuper(struct objc_super *super, SEL op, ...)
-LIBBUILTIN(objc_msgSendSuper, "Gv*H.", "f", "objc/message.h", OBJC_LANG)
+LIBBUILTIN(objc_msgSendSuper, "GM*H.", "f", "objc/message.h", OBJC_LANG)
 // void objc_msgSendSuper_stret(struct objc_super *super, SEL op, ...)
-LIBBUILTIN(objc_msgSendSuper_stret, "vv*H.", "f", "objc/message.h", OBJC_LANG)
+LIBBUILTIN(objc_msgSendSuper_stret, "vM*H.", "f", "objc/message.h", OBJC_LANG)
 //   id objc_getClass(const char *name)
 LIBBUILTIN(objc_getClass, "GcC*",   "f",     "objc/runtime.h", OBJC_LANG)
 //   id objc_getMetaClass(const char *name)
@@ -833,6 +834,14 @@ LIBBUILTIN(ceil, "dd", "fc", "math.h", ALL_LANGUAGES)
 LIBBUILTIN(ceill, "LdLd", "fc", "math.h", ALL_LANGUAGES)
 LIBBUILTIN(ceilf, "ff", "fc", "math.h", ALL_LANGUAGES)
 
+LIBBUILTIN(cimag, "dXd", "fnc", "complex.h", ALL_LANGUAGES)
+LIBBUILTIN(cimagf, "fXf", "fnc", "complex.h", ALL_LANGUAGES)
+LIBBUILTIN(cimagl, "LdXLd", "fnc", "complex.h", ALL_LANGUAGES)
+
+LIBBUILTIN(creal, "dXd", "fnc", "complex.h", ALL_LANGUAGES)
+LIBBUILTIN(crealf, "fXf", "fnc", "complex.h", ALL_LANGUAGES)
+LIBBUILTIN(creall, "LdXLd", "fnc", "complex.h", ALL_LANGUAGES)
+
 LIBBUILTIN(copysign, "ddd", "fc", "math.h", ALL_LANGUAGES)
 LIBBUILTIN(copysignl, "LdLdLd", "fc", "math.h", ALL_LANGUAGES)
 LIBBUILTIN(copysignf, "fff", "fc", "math.h", ALL_LANGUAGES)
@@ -917,5 +926,15 @@ LIBBUILTIN(_Block_object_dispose, "vvC*iC", "f", "Blocks.h", ALL_LANGUAGES)
 // Annotation function
 BUILTIN(__builtin_annotation, "v.", "tn")
 
+// Multiprecision Arithmetic Builtins.
+BUILTIN(__builtin_addcs, "UsUsCUsCUsCUs*", "n")
+BUILTIN(__builtin_addc, "UiUiCUiCUiCUi*", "n")
+BUILTIN(__builtin_addcl, "ULiULiCULiCULiCULi*", "n")
+BUILTIN(__builtin_addcll, "ULLiULLiCULLiCULLiCULLi*", "n")
+BUILTIN(__builtin_subcs, "UsUsCUsCUsCUs*", "n")
+BUILTIN(__builtin_subc, "UiUiCUiCUiCUi*", "n")
+BUILTIN(__builtin_subcl, "ULiULiCULiCULiCULi*", "n")
+BUILTIN(__builtin_subcll, "ULLiULLiCULLiCULLiCULLi*", "n")
+
 #undef BUILTIN
 #undef LIBBUILTIN
diff --git a/include/clang/Basic/Builtins.h b/include/clang/Basic/Builtins.h
index 257daf1..3b88e15 100644
--- a/include/clang/Basic/Builtins.h
+++ b/include/clang/Basic/Builtins.h
@@ -109,6 +109,12 @@ public:
     return strchr(GetRecord(ID).Attributes, 'j') != 0;
   }
 
+  /// \brief Returns true if this builtin does not perform the side-effects
+  /// of its arguments.
+  bool isUnevaluated(unsigned ID) const {
+    return strchr(GetRecord(ID).Attributes, 'u') != 0;
+  }
+
   /// \brief Return true if this is a builtin for a libc/libm function,
   /// with a "__builtin_" prefix (e.g. __builtin_abs).
   bool isLibFunction(unsigned ID) const {
diff --git a/include/clang/Basic/BuiltinsX86.def b/include/clang/Basic/BuiltinsX86.def
index 5b46f8e..d536821 100644
--- a/include/clang/Basic/BuiltinsX86.def
+++ b/include/clang/Basic/BuiltinsX86.def
@@ -624,6 +624,11 @@ BUILTIN(__builtin_ia32_rdrand16_step, "UiUs*", "")
 BUILTIN(__builtin_ia32_rdrand32_step, "UiUi*", "")
 BUILTIN(__builtin_ia32_rdrand64_step, "UiULLi*", "")
 
+// RDSEED
+BUILTIN(__builtin_ia32_rdseed16_step, "UiUs*", "")
+BUILTIN(__builtin_ia32_rdseed32_step, "UiUi*", "")
+BUILTIN(__builtin_ia32_rdseed64_step, "UiULLi*", "")
+
 // BMI
 BUILTIN(__builtin_ia32_bextr_u32, "UiUiUi", "")
 BUILTIN(__builtin_ia32_bextr_u64, "ULLiULLiULLi", "")
@@ -739,5 +744,6 @@ BUILTIN(__builtin_ia32_vfrczpd256, "V4dV4d", "")
 BUILTIN(__builtin_ia32_xbegin, "i", "")
 BUILTIN(__builtin_ia32_xend, "v", "")
 BUILTIN(__builtin_ia32_xabort, "vIc", "")
+BUILTIN(__builtin_ia32_xtest, "i", "")
 
 #undef BUILTIN
diff --git a/include/clang/Basic/CharInfo.h b/include/clang/Basic/CharInfo.h
new file mode 100644
index 0000000..d0afda4
--- /dev/null
+++ b/include/clang/Basic/CharInfo.h
@@ -0,0 +1,198 @@
+//===--- clang/Basic/CharInfo.h - Classifying ASCII Characters ------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef CLANG_BASIC_CHARINFO_H
+#define CLANG_BASIC_CHARINFO_H
+
+#include "clang/Basic/LLVM.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/DataTypes.h"
+
+namespace clang {
+namespace charinfo {
+  extern const uint16_t InfoTable[256];
+
+  enum {
+    CHAR_HORZ_WS  = 0x0001,  // '\t', '\f', '\v'.  Note, no '\0'
+    CHAR_VERT_WS  = 0x0002,  // '\r', '\n'
+    CHAR_SPACE    = 0x0004,  // ' '
+    CHAR_DIGIT    = 0x0008,  // 0-9
+    CHAR_XLETTER  = 0x0010,  // a-f,A-F
+    CHAR_UPPER    = 0x0020,  // A-Z
+    CHAR_LOWER    = 0x0040,  // a-z
+    CHAR_UNDER    = 0x0080,  // _
+    CHAR_PERIOD   = 0x0100,  // .
+    CHAR_RAWDEL   = 0x0200,  // {}[]#<>%:;?*+-/^&|~!=,"'
+    CHAR_PUNCT    = 0x0400   // `$@()
+  };
+
+  enum {
+    CHAR_XUPPER = CHAR_XLETTER | CHAR_UPPER,
+    CHAR_XLOWER = CHAR_XLETTER | CHAR_LOWER
+  };
+} // end namespace charinfo
+
+/// Returns true if this is an ASCII character.
+LLVM_READNONE static inline bool isASCII(char c) {
+  return static_cast<unsigned char>(c) <= 127;
+}
+
+/// Returns true if this is a valid first character of a C identifier,
+/// which is [a-zA-Z_].
+LLVM_READONLY static inline bool isIdentifierHead(unsigned char c,
+                                                  bool AllowDollar = false) {
+  using namespace charinfo;
+  if (InfoTable[c] & (CHAR_UPPER|CHAR_LOWER|CHAR_UNDER))
+    return true;
+  return AllowDollar && c == '$';
+}
+
+/// Returns true if this is a body character of a C identifier,
+/// which is [a-zA-Z0-9_].
+LLVM_READONLY static inline bool isIdentifierBody(unsigned char c,
+                                                  bool AllowDollar = false) {
+  using namespace charinfo;
+  if (InfoTable[c] & (CHAR_UPPER|CHAR_LOWER|CHAR_DIGIT|CHAR_UNDER))
+    return true;
+  return AllowDollar && c == '$';
+}
+
+/// Returns true if this character is horizontal ASCII whitespace:
+/// ' ', '\\t', '\\f', '\\v'.
+///
+/// Note that this returns false for '\\0'.
+LLVM_READONLY static inline bool isHorizontalWhitespace(unsigned char c) {
+  using namespace charinfo;
+  return (InfoTable[c] & (CHAR_HORZ_WS|CHAR_SPACE)) != 0;
+}
+
+/// Returns true if this character is vertical ASCII whitespace: '\\n', '\\r'.
+///
+/// Note that this returns false for '\\0'.
+LLVM_READONLY static inline bool isVerticalWhitespace(unsigned char c) {
+  using namespace charinfo;
+  return (InfoTable[c] & CHAR_VERT_WS) != 0;
+}
+
+/// Return true if this character is horizontal or vertical ASCII whitespace:
+/// ' ', '\\t', '\\f', '\\v', '\\n', '\\r'.
+///
+/// Note that this returns false for '\\0'.
+LLVM_READONLY static inline bool isWhitespace(unsigned char c) {
+  using namespace charinfo;
+  return (InfoTable[c] & (CHAR_HORZ_WS|CHAR_VERT_WS|CHAR_SPACE)) != 0;
+}
+
+/// Return true if this character is an ASCII digit: [0-9]
+LLVM_READONLY static inline bool isDigit(unsigned char c) {
+  using namespace charinfo;
+  return (InfoTable[c] & CHAR_DIGIT) != 0;
+}
+
+/// Return true if this character is a lowercase ASCII letter: [a-z]
+LLVM_READONLY static inline bool isLowercase(unsigned char c) {
+  using namespace charinfo;
+  return (InfoTable[c] & CHAR_LOWER) != 0;
+}
+
+/// Return true if this character is an uppercase ASCII letter: [A-Z]
+LLVM_READONLY static inline bool isUppercase(unsigned char c) {
+  using namespace charinfo;
+  return (InfoTable[c] & CHAR_UPPER) != 0;
+}
+
+/// Return true if this character is an ASCII letter: [a-zA-Z]
+LLVM_READONLY static inline bool isLetter(unsigned char c) {
+  using namespace charinfo;
+  return (InfoTable[c] & (CHAR_UPPER|CHAR_LOWER)) != 0;
+}
+
+/// Return true if this character is an ASCII letter or digit: [a-zA-Z0-9]
+LLVM_READONLY static inline bool isAlphanumeric(unsigned char c) {
+  using namespace charinfo;
+  return (InfoTable[c] & (CHAR_DIGIT|CHAR_UPPER|CHAR_LOWER)) != 0;
+}
+
+/// Return true if this character is an ASCII hex digit: [0-9a-fA-F]
+LLVM_READONLY static inline bool isHexDigit(unsigned char c) {
+  using namespace charinfo;
+  return (InfoTable[c] & (CHAR_DIGIT|CHAR_XLETTER)) != 0;
+}
+
+/// Return true if this character is an ASCII punctuation character.
+///
+/// Note that '_' is both a punctuation character and an identifier character!
+LLVM_READONLY static inline bool isPunctuation(unsigned char c) {
+  using namespace charinfo;
+  return (InfoTable[c] & (CHAR_UNDER|CHAR_PERIOD|CHAR_RAWDEL|CHAR_PUNCT)) != 0;
+}
+
+/// Return true if this character is an ASCII printable character; that is, a
+/// character that should take exactly one column to print in a fixed-width
+/// terminal.
+LLVM_READONLY static inline bool isPrintable(unsigned char c) {
+  using namespace charinfo;
+  return (InfoTable[c] & (CHAR_UPPER|CHAR_LOWER|CHAR_PERIOD|CHAR_PUNCT|
+                          CHAR_DIGIT|CHAR_UNDER|CHAR_RAWDEL|CHAR_SPACE)) != 0;
+}
+
+/// Return true if this is the body character of a C preprocessing number,
+/// which is [a-zA-Z0-9_.].
+LLVM_READONLY static inline bool isPreprocessingNumberBody(unsigned char c) {
+  using namespace charinfo;
+  return (InfoTable[c] &
+          (CHAR_UPPER|CHAR_LOWER|CHAR_DIGIT|CHAR_UNDER|CHAR_PERIOD)) != 0;
+}
+
+/// Return true if this is the body character of a C++ raw string delimiter.
+LLVM_READONLY static inline bool isRawStringDelimBody(unsigned char c) {
+  using namespace charinfo;
+  return (InfoTable[c] & (CHAR_UPPER|CHAR_LOWER|CHAR_PERIOD|
+                          CHAR_DIGIT|CHAR_UNDER|CHAR_RAWDEL)) != 0;
+}
+
+
+/// Converts the given ASCII character to its lowercase equivalent.
+///
+/// If the character is not an uppercase character, it is returned as is.
+LLVM_READONLY static inline char toLowercase(char c) {
+  if (isUppercase(c))
+    return c + 'a' - 'A';
+  return c;
+}
+
+/// Converts the given ASCII character to its uppercase equivalent.
+///
+/// If the character is not a lowercase character, it is returned as is.
+LLVM_READONLY static inline char toUppercase(char c) {
+  if (isLowercase(c))
+    return c + 'A' - 'a';
+  return c;
+}
+
+
+/// Return true if this is a valid ASCII identifier.
+///
+/// Note that this is a very simple check; it does not accept '$' or UCNs as
+/// valid identifier characters.
+LLVM_READONLY static inline bool isValidIdentifier(StringRef S) {
+  if (S.empty() || !isIdentifierHead(S[0]))
+    return false;
+
+  for (StringRef::iterator I = S.begin(), E = S.end(); I != E; ++I)
+    if (!isIdentifierBody(*I))
+      return false;
+
+  return true;
+}
+
+} // end namespace clang
+
+#endif
diff --git a/include/clang/Basic/CommentOptions.h b/include/clang/Basic/CommentOptions.h
new file mode 100644
index 0000000..79b9a6b
--- /dev/null
+++ b/include/clang/Basic/CommentOptions.h
@@ -0,0 +1,34 @@
+//===--- CommentOptions.h - Options for parsing comments -----*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief Defines the clang::CommentOptions interface.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_COMMENTOPTIONS_H
+#define LLVM_CLANG_COMMENTOPTIONS_H
+
+#include <string>
+#include <vector>
+
+namespace clang {
+
+/// \brief Options for controlling comment parsing.
+struct CommentOptions {
+  typedef std::vector<std::string> BlockCommandNamesTy;
+
+  /// \brief Command names to treat as block commands in comments.
+  /// Should not include the leading backslash.
+  BlockCommandNamesTy BlockCommandNames;
+};
+
+}  // end namespace clang
+
+#endif
diff --git a/include/clang/Basic/ConvertUTF.h b/include/clang/Basic/ConvertUTF.h
deleted file mode 100644
index cdc4269..0000000
--- a/include/clang/Basic/ConvertUTF.h
+++ /dev/null
@@ -1,203 +0,0 @@
-/*===--- ConvertUTF.h - Universal Character Names conversions ---------------===
- *
- *                     The LLVM Compiler Infrastructure
- *
- * This file is distributed under the University of Illinois Open Source
- * License. See LICENSE.TXT for details.
- *
- *==------------------------------------------------------------------------==*/
-/*
- * Copyright 2001-2004 Unicode, Inc.
- *
- * Disclaimer
- *
- * This source code is provided as is by Unicode, Inc. No claims are
- * made as to fitness for any particular purpose. No warranties of any
- * kind are expressed or implied. The recipient agrees to determine
- * applicability of information provided. If this file has been
- * purchased on magnetic or optical media from Unicode, Inc., the
- * sole remedy for any claim will be exchange of defective media
- * within 90 days of receipt.
- *
- * Limitations on Rights to Redistribute This Code
- *
- * Unicode, Inc. hereby grants the right to freely use the information
- * supplied in this file in the creation of products supporting the
- * Unicode Standard, and to make copies of this file in any form
- * for internal or external distribution as long as this notice
- * remains attached.
- */
-
-/* ---------------------------------------------------------------------
-
-    Conversions between UTF32, UTF-16, and UTF-8.  Header file.
-
-    Several funtions are included here, forming a complete set of
-    conversions between the three formats.  UTF-7 is not included
-    here, but is handled in a separate source file.
-
-    Each of these routines takes pointers to input buffers and output
-    buffers.  The input buffers are const.
-
-    Each routine converts the text between *sourceStart and sourceEnd,
-    putting the result into the buffer between *targetStart and
-    targetEnd. Note: the end pointers are *after* the last item: e.g.
-    *(sourceEnd - 1) is the last item.
-
-    The return result indicates whether the conversion was successful,
-    and if not, whether the problem was in the source or target buffers.
-    (Only the first encountered problem is indicated.)
-
-    After the conversion, *sourceStart and *targetStart are both
-    updated to point to the end of last text successfully converted in
-    the respective buffers.
-
-    Input parameters:
-        sourceStart - pointer to a pointer to the source buffer.
-                The contents of this are modified on return so that
-                it points at the next thing to be converted.
-        targetStart - similarly, pointer to pointer to the target buffer.
-        sourceEnd, targetEnd - respectively pointers to the ends of the
-                two buffers, for overflow checking only.
-
-    These conversion functions take a ConversionFlags argument. When this
-    flag is set to strict, both irregular sequences and isolated surrogates
-    will cause an error.  When the flag is set to lenient, both irregular
-    sequences and isolated surrogates are converted.
-
-    Whether the flag is strict or lenient, all illegal sequences will cause
-    an error return. This includes sequences such as: <F4 90 80 80>, <C0 80>,
-    or <A0> in UTF-8, and values above 0x10FFFF in UTF-32. Conformant code
-    must check for illegal sequences.
-
-    When the flag is set to lenient, characters over 0x10FFFF are converted
-    to the replacement character; otherwise (when the flag is set to strict)
-    they constitute an error.
-
-    Output parameters:
-        The value "sourceIllegal" is returned from some routines if the input
-        sequence is malformed.  When "sourceIllegal" is returned, the source
-        value will point to the illegal value that caused the problem. E.g.,
-        in UTF-8 when a sequence is malformed, it points to the start of the
-        malformed sequence.
-
-    Author: Mark E. Davis, 1994.
-    Rev History: Rick McGowan, fixes & updates May 2001.
-         Fixes & updates, Sept 2001.
-
------------------------------------------------------------------------- */
-
-#ifndef CLANG_BASIC_CONVERTUTF_H
-#define CLANG_BASIC_CONVERTUTF_H
-
-/* ---------------------------------------------------------------------
-    The following 4 definitions are compiler-specific.
-    The C standard does not guarantee that wchar_t has at least
-    16 bits, so wchar_t is no less portable than unsigned short!
-    All should be unsigned values to avoid sign extension during
-    bit mask & shift operations.
------------------------------------------------------------------------- */
-
-typedef unsigned int    UTF32;  /* at least 32 bits */
-typedef unsigned short  UTF16;  /* at least 16 bits */
-typedef unsigned char   UTF8;   /* typically 8 bits */
-typedef unsigned char   Boolean; /* 0 or 1 */
-
-/* Some fundamental constants */
-#define UNI_REPLACEMENT_CHAR (UTF32)0x0000FFFD
-#define UNI_MAX_BMP (UTF32)0x0000FFFF
-#define UNI_MAX_UTF16 (UTF32)0x0010FFFF
-#define UNI_MAX_UTF32 (UTF32)0x7FFFFFFF
-#define UNI_MAX_LEGAL_UTF32 (UTF32)0x0010FFFF
-
-#define UNI_MAX_UTF8_BYTES_PER_CODE_POINT 4
-
-typedef enum {
-  conversionOK,           /* conversion successful */
-  sourceExhausted,        /* partial character in source, but hit end */
-  targetExhausted,        /* insuff. room in target for conversion */
-  sourceIllegal           /* source sequence is illegal/malformed */
-} ConversionResult;
-
-typedef enum {
-  strictConversion = 0,
-  lenientConversion
-} ConversionFlags;
-
-/* This is for C++ and does no harm in C */
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-ConversionResult ConvertUTF8toUTF16 (
-  const UTF8** sourceStart, const UTF8* sourceEnd,
-  UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags);
-
-ConversionResult ConvertUTF8toUTF32 (
-  const UTF8** sourceStart, const UTF8* sourceEnd,
-  UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags);
-
-#ifdef CLANG_NEEDS_THESE_ONE_DAY
-ConversionResult ConvertUTF16toUTF8 (
-  const UTF16** sourceStart, const UTF16* sourceEnd,
-  UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags);
-#endif
-
-ConversionResult ConvertUTF32toUTF8 (
-  const UTF32** sourceStart, const UTF32* sourceEnd,
-  UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags);
-
-ConversionResult ConvertUTF16toUTF32 (
-  const UTF16** sourceStart, const UTF16* sourceEnd,
-  UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags);
-
-ConversionResult ConvertUTF32toUTF16 (
-  const UTF32** sourceStart, const UTF32* sourceEnd,
-  UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags);
-#endif
-
-Boolean isLegalUTF8Sequence(const UTF8 *source, const UTF8 *sourceEnd);
-
-Boolean isLegalUTF8String(const UTF8 **source, const UTF8 *sourceEnd);
-
-unsigned getNumBytesForUTF8(UTF8 firstByte);
-
-#ifdef __cplusplus
-}
-
-/*************************************************************************/
-/* Below are LLVM-specific wrappers of the functions above. */
-
-#include "llvm/ADT/StringRef.h"
-
-namespace clang {
-
-/**
- * Convert an UTF8 StringRef to UTF8, UTF16, or UTF32 depending on
- * WideCharWidth. The converted data is written to ResultPtr, which needs to
- * point to at least WideCharWidth * (Source.Size() + 1) bytes. On success,
- * ResultPtr will point one after the end of the copied string. On failure,
- * ResultPtr will not be changed, and ErrorPtr will be set to the location of
- * the first character which could not be converted.
- * \return true on success.
- */
-bool ConvertUTF8toWide(unsigned WideCharWidth, llvm::StringRef Source,
-                       char *&ResultPtr, const UTF8 *&ErrorPtr);
-
-/**
- * Convert an Unicode code point to UTF8 sequence.
- *
- * \param Source a Unicode code point.
- * \param [in,out] ResultPtr pointer to the output buffer, needs to be at least
- * \c UNI_MAX_UTF8_BYTES_PER_CODE_POINT bytes.  On success \c ResultPtr is
- * updated one past end of the converted sequence.
- *
- * \returns true on success.
- */
-bool ConvertCodePointToUTF8(unsigned Source, char *&ResultPtr);
-
-}
-
-#endif
-
-/* --------------------------------------------------------------------- */
diff --git a/include/clang/Basic/DeclNodes.td b/include/clang/Basic/DeclNodes.td
index 6f2bb35..45742bc 100644
--- a/include/clang/Basic/DeclNodes.td
+++ b/include/clang/Basic/DeclNodes.td
@@ -74,4 +74,6 @@ def StaticAssert : Decl;
 def Block : Decl, DeclContext;
 def ClassScopeFunctionSpecialization : Decl;
 def Import : Decl;
+def OMPThreadPrivate : Decl;
+def Empty : Decl;
 
diff --git a/include/clang/Basic/Diagnostic.h b/include/clang/Basic/Diagnostic.h
index e47f3e1..0327636 100644
--- a/include/clang/Basic/Diagnostic.h
+++ b/include/clang/Basic/Diagnostic.h
@@ -23,9 +23,8 @@
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/Support/type_traits.h"
-
-#include <vector>
 #include <list>
+#include <vector>
 
 namespace clang {
   class DiagnosticConsumer;
@@ -78,7 +77,7 @@ public:
                                    bool BeforePreviousInsertions = false) {
     FixItHint Hint;
     Hint.RemoveRange =
-      CharSourceRange(SourceRange(InsertionLoc, InsertionLoc), false);
+      CharSourceRange::getCharRange(InsertionLoc, InsertionLoc);
     Hint.CodeToInsert = Code;
     Hint.BeforePreviousInsertions = BeforePreviousInsertions;
     return Hint;
@@ -91,7 +90,7 @@ public:
                                         bool BeforePreviousInsertions = false) {
     FixItHint Hint;
     Hint.RemoveRange =
-      CharSourceRange(SourceRange(InsertionLoc, InsertionLoc), false);
+      CharSourceRange::getCharRange(InsertionLoc, InsertionLoc);
     Hint.InsertFromRange = FromRange;
     Hint.BeforePreviousInsertions = BeforePreviousInsertions;
     return Hint;
@@ -176,6 +175,7 @@ private:
   bool SuppressAllDiagnostics;   // Suppress all diagnostics.
   bool ElideType;                // Elide common types of templates.
   bool PrintTemplateTree;        // Print a tree when comparing templates.
+  bool WarnOnSpellCheck;         // Emit warning when spellcheck is initiated.
   bool ShowColors;               // Color printing is enabled.
   OverloadsShown ShowOverloads;  // Which overload candidates to show.
   unsigned ErrorLimit;           // Cap of # errors emitted, 0 -> no limit.
@@ -280,6 +280,10 @@ private:
   /// \brief Sticky flag set to \c true when an error is emitted.
   bool ErrorOccurred;
 
+  /// \brief Sticky flag set to \c true when an "uncompilable error" occurs.
+  /// I.e. an error that was not upgraded from a warning by -Werror.
+  bool UncompilableErrorOccurred;
+
   /// \brief Sticky flag set to \c true when a fatal error is emitted.
   bool FatalErrorOccurred;
 
@@ -432,8 +436,8 @@ public:
   ///
   /// If this and IgnoreAllWarnings are both set, then that one wins.
   void setEnableAllWarnings(bool Val) { EnableAllWarnings = Val; }
-  bool getEnableAllWarnngs() const { return EnableAllWarnings; }
-  
+  bool getEnableAllWarnings() const { return EnableAllWarnings; }
+
   /// \brief When set to true, any warnings reported are issued as errors.
   void setWarningsAsErrors(bool Val) { WarningsAsErrors = Val; }
   bool getWarningsAsErrors() const { return WarningsAsErrors; }
@@ -463,6 +467,10 @@ public:
   /// tree format.
   void setPrintTemplateTree(bool Val = false) { PrintTemplateTree = Val; }
   bool getPrintTemplateTree() { return PrintTemplateTree; }
+
+  /// \brief Warn when spellchecking is initated, for testing.
+  void setWarnOnSpellCheck(bool Val = false) { WarnOnSpellCheck = Val; }
+  bool getWarnOnSpellCheck() { return WarnOnSpellCheck; }
  
   /// \brief Set color printing, so the type diffing will inject color markers
   /// into the output.
@@ -559,6 +567,12 @@ public:
                                   SourceLocation Loc = SourceLocation());
 
   bool hasErrorOccurred() const { return ErrorOccurred; }
+
+  /// \brief Errors that actually prevent compilation, not those that are
+  /// upgraded from a warning by -Werror.
+  bool hasUncompilableErrorOccurred() const {
+    return UncompilableErrorOccurred;
+  }
   bool hasFatalErrorOccurred() const { return FatalErrorOccurred; }
   
   /// \brief Determine whether any kind of unrecoverable error has occurred.
@@ -574,7 +588,7 @@ public:
 
   /// \brief Return an ID for a diagnostic with the specified message and level.
   ///
-  /// If this is the first request for this diagnosic, it is registered and
+  /// If this is the first request for this diagnostic, it is registered and
   /// created, otherwise the existing ID is returned.
   unsigned getCustomDiagID(Level L, StringRef Message) {
     return Diags->getCustomDiagID((DiagnosticIDs::Level)L, Message);
@@ -598,6 +612,12 @@ public:
     ArgToStringCookie = Cookie;
   }
 
+  /// \brief Note that the prior diagnostic was emitted by some other
+  /// \c DiagnosticsEngine, and we may be attaching a note to that diagnostic.
+  void notePriorDiagnosticFrom(const DiagnosticsEngine &Other) {
+    LastDiagLevel = Other.LastDiagLevel;
+  }
+
   /// \brief Reset the state of the diagnostic object to its initial 
   /// configuration.
   void Reset();
diff --git a/include/clang/Basic/DiagnosticASTKinds.td b/include/clang/Basic/DiagnosticASTKinds.td
index d869c99..9be32af 100644
--- a/include/clang/Basic/DiagnosticASTKinds.td
+++ b/include/clang/Basic/DiagnosticASTKinds.td
@@ -106,6 +106,9 @@ def note_constexpr_calls_suppressed : Note<
   "(skipping %0 call%s0 in backtrace; use -fconstexpr-backtrace-limit=0 to "
   "see all)">;
 def note_constexpr_call_here : Note<"in call to '%0'">;
+def warn_integer_constant_overflow : Warning<
+  "overflow in expression; result is %0 with type %1">,
+  InGroup<DiagGroup<"integer-overflow">>;
 
 // inline asm related.
 let CategoryName = "Inline Assembly Issue" in {
@@ -135,7 +138,8 @@ def err_odr_function_type_inconsistent : Error<
   "external function %0 declared with incompatible types in different "
   "translation units (%1 vs. %2)">;
 def warn_odr_tag_type_inconsistent : Warning<
-  "type %0 has incompatible definitions in different translation units">;
+  "type %0 has incompatible definitions in different translation units">,
+  InGroup<DiagGroup<"odr">>;
 def note_odr_tag_kind_here: Note<
   "%0 is a %select{struct|interface|union|class|enum}1 here">;
 def note_odr_field : Note<"field %0 has type %1 here">;
diff --git a/include/clang/Basic/DiagnosticCommentKinds.td b/include/clang/Basic/DiagnosticCommentKinds.td
index e6dfe5b..3880e0e 100644
--- a/include/clang/Basic/DiagnosticCommentKinds.td
+++ b/include/clang/Basic/DiagnosticCommentKinds.td
@@ -44,18 +44,18 @@ def note_doc_html_end_tag : Note<
 // Commands
 
 def warn_doc_block_command_empty_paragraph : Warning<
-  "empty paragraph passed to '\\%0' command">,
+  "empty paragraph passed to '%select{\\|@}0%1' command">,
   InGroup<Documentation>, DefaultIgnore;
 
 def warn_doc_block_command_duplicate : Warning<
-  "duplicated command '\\%0'">,
+  "duplicated command '%select{\\|@}0%1'">,
   InGroup<Documentation>, DefaultIgnore;
 
 def note_doc_block_command_previous : Note<
-  "previous command '\\%0' here">;
+  "previous command '%select{\\|@}0%1' here">;
 
 def note_doc_block_command_previous_alias : Note<
-  "previous command '\\%0' (an alias of '\\%1') here">;
+  "previous command '%select{\\|@}0%1' (an alias of '\\%2') here">;
 
 // \param command
 
@@ -69,10 +69,29 @@ def warn_doc_param_spaces_in_direction : Warning<
   InGroup<DocumentationPedantic>, DefaultIgnore;
 
 def warn_doc_param_not_attached_to_a_function_decl : Warning<
-  "'\\param' command used in a comment that is not attached to "
+  "'%select{\\|@}0param' command used in a comment that is not attached to "
   "a function declaration">,
   InGroup<Documentation>, DefaultIgnore;
 
+def warn_doc_function_method_decl_mismatch : Warning<
+  "'%select{\\|@}0%select{function|functiongroup|method|methodgroup|callback}1' "
+  "command should be used in a comment attached to "
+  "%select{a function|a function|an Objective-C method|an Objective-C method|"
+  "a pointer to function}2 declaration">,
+  InGroup<Documentation>, DefaultIgnore;
+  
+def warn_doc_api_container_decl_mismatch : Warning<
+  "'%select{\\|@}0%select{class|interface|protocol|struct|union}1' "
+  "command should not be used in a comment attached to a "
+  "non-%select{class|interface|protocol|struct|union}2 declaration">,
+  InGroup<Documentation>, DefaultIgnore;
+  
+def warn_doc_container_decl_mismatch : Warning<
+  "'%select{\\|@}0%select{classdesign|coclass|dependency|helper"
+  "|helperclass|helps|instancesize|ownership|performance|security|superclass}1' "
+  "command should not be used in a comment attached to a non-container declaration">,
+  InGroup<Documentation>, DefaultIgnore;
+  
 def warn_doc_param_duplicate : Warning<
   "parameter '%0' is already documented">,
   InGroup<Documentation>, DefaultIgnore;
@@ -87,10 +106,10 @@ def warn_doc_param_not_found : Warning<
 def note_doc_param_name_suggestion : Note<
   "did you mean '%0'?">;
 
-// \tparam command
+// tparam command
 
 def warn_doc_tparam_not_attached_to_a_template_decl : Warning<
-  "'\\tparam' command used in a comment that is not attached to "
+  "'%select{\\|@}0tparam' command used in a comment that is not attached to "
   "a template declaration">,
   InGroup<Documentation>, DefaultIgnore;
 
@@ -111,14 +130,14 @@ def note_doc_tparam_name_suggestion : Note<
 // \returns command
 
 def warn_doc_returns_not_attached_to_a_function_decl : Warning<
-  "'\\%0' command used in a comment that is not attached to "
+  "'%select{\\|@}0%1' command used in a comment that is not attached to "
   "a function or method declaration">,
   InGroup<Documentation>, DefaultIgnore;
 
 def warn_doc_returns_attached_to_a_void_function : Warning<
-  "'\\%0' command used in a comment that is attached to a "
+  "'%select{\\|@}0%1' command used in a comment that is attached to a "
   "%select{function returning void|constructor|destructor|"
-  "method returning void}1">,
+  "method returning void}2">,
   InGroup<Documentation>, DefaultIgnore;
 
 // \deprecated command
@@ -134,7 +153,7 @@ def note_add_deprecation_attr : Note<
 // verbatim block commands
 
 def warn_verbatim_block_end_without_start : Warning<
-  "'\\%0' command does not terminate a verbatim text block">,
+  "'%select{\\|@}0%1' command does not terminate a verbatim text block">,
   InGroup<Documentation>, DefaultIgnore;
 
 } // end of documentation issue category
diff --git a/include/clang/Basic/DiagnosticCommonKinds.td b/include/clang/Basic/DiagnosticCommonKinds.td
index a6ce9d4..7ff6ae1 100644
--- a/include/clang/Basic/DiagnosticCommonKinds.td
+++ b/include/clang/Basic/DiagnosticCommonKinds.td
@@ -41,6 +41,9 @@ def err_expected_colon : Error<"expected ':'">;
 def err_expected_colon_after_setter_name : Error<
   "method name referenced in property setter attribute "
   "must end with ':'">;
+def err_expected_string_literal : Error<"expected string literal "
+  "%select{in %1|for diagnostic message in static_assert|"
+          "for optional message in 'availability' attribute}0">;
 def err_invalid_string_udl : Error<
   "string literal with user-defined suffix cannot be used here">;
 def err_invalid_character_udl : Error<
@@ -49,8 +52,6 @@ def err_invalid_numeric_udl : Error<
   "numeric literal with user-defined suffix cannot be used here">;
 
 // Parse && Sema
-def ext_no_declarators : ExtWarn<"declaration does not declare anything">,
-  InGroup<MissingDeclarations>;
 def err_param_redefinition : Error<"redefinition of parameter %0">;
 def warn_method_param_redefinition : Warning<"redefinition of method parameter %0">;
 def warn_method_param_declaration : Warning<"redeclaration of method parameter %0">,
@@ -71,11 +72,12 @@ def err_module_not_found : Error<"module '%0' not found">, DefaultFatal;
 def err_module_not_built : Error<"could not build module '%0'">, DefaultFatal;
 def err_module_cycle : Error<"cyclic dependency in module '%0': %1">, 
   DefaultFatal;
-def warn_module_build : Warning<"building module '%0' from source">, 
-  InGroup<ModuleBuild>, DefaultIgnore;
 def note_pragma_entered_here : Note<"#pragma entered here">;  
 def note_decl_hiding_tag_type : Note<
   "%1 %0 is hidden by a non-type declaration of %0 here">;
+def err_attribute_not_type_attr : Error<
+  "%0 attribute cannot be applied to types">;
+def err_enum_template : Error<"enumeration cannot be a template">;
 
 // Sema && Lex
 def ext_c99_longlong : Extension<
@@ -115,4 +117,8 @@ def err_unable_to_rename_temp : Error<
   "unable to rename temporary '%0' to output file '%1': '%2'">;
 def err_unable_to_make_temp : Error<
   "unable to make temporary file: %0">;
+  
+// Modules
+def err_module_file_conflict : Error<"module '%0' found in both '%1' and '%2'">;
+
 }
diff --git a/include/clang/Basic/DiagnosticDriverKinds.td b/include/clang/Basic/DiagnosticDriverKinds.td
index 4b43035..15b8948 100644
--- a/include/clang/Basic/DiagnosticDriverKinds.td
+++ b/include/clang/Basic/DiagnosticDriverKinds.td
@@ -35,6 +35,8 @@ def err_drv_use_of_Z_option : Error<
   "unsupported use of internal gcc -Z option '%0'">;
 def err_drv_output_argument_with_multiple_files : Error<
   "cannot specify -o when generating multiple output files">;
+def err_no_external_windows_assembler : Error<
+  "there is no external assembler we can use on windows">;
 def err_drv_unable_to_remove_file : Error<
   "unable to remove file: %0">;
 def err_drv_command_failure : Error<
@@ -57,6 +59,8 @@ def err_drv_no_linker_llvm_support : Error<
   "'%0': unable to pass LLVM bit-code files to linker">;
 def err_drv_no_ast_support : Error<
   "'%0': unable to use AST files with this tool">;
+def err_drv_no_module_support : Error<
+  "'%0': unable to use module files with this tool">;
 def err_drv_clang_unsupported : Error<
   "the clang compiler does not support '%0'">;
 def err_drv_clang_unsupported_per_platform : Error<
@@ -67,6 +71,8 @@ def err_drv_command_failed : Error<
   "%0 command failed with exit code %1 (use -v to see invocation)">;
 def err_drv_command_signalled : Error<
   "%0 command failed due to signal (use -v to see invocation)">;
+def err_drv_force_crash : Error<
+  "failing because environment variable '%0' is set">;
 def err_drv_invalid_mfloat_abi : Error<
   "invalid float ABI '%0'">;
 def err_drv_invalid_libcxx_deployment : Error<
@@ -108,19 +114,21 @@ def warn_c_kext : Warning<
   "ignoring -fapple-kext which is valid for C++ and Objective-C++ only">;
 def warn_drv_input_file_unused : Warning<
   "%0: '%1' input unused%select{ when '%3' is present|}2">,
-  InGroup<DiagGroup<"unused-command-line-argument">>;
+  InGroup<UnusedCommandLineArgument>;
 def warn_drv_input_file_unused_by_cpp : Warning<
   "%0: '%1' input unused in cpp mode">,
-  InGroup<DiagGroup<"unused-command-line-argument">>;
+  InGroup<UnusedCommandLineArgument>;
 def warn_drv_preprocessed_input_file_unused : Warning<
   "%0: previously preprocessed input%select{ unused when '%2' is present|}1">,
-  InGroup<DiagGroup<"unused-command-line-argument">>;
+  InGroup<UnusedCommandLineArgument>;
 def warn_drv_unused_argument : Warning<
   "argument unused during compilation: '%0'">,
-  InGroup<DiagGroup<"unused-command-line-argument">>;
+  InGroup<UnusedCommandLineArgument>;
 def warn_drv_empty_joined_argument : Warning<
   "joined argument expects additional value: '%0'">,
-  InGroup<DiagGroup<"unused-command-line-argument">>;
+  InGroup<UnusedCommandLineArgument>;
+def warn_drv_unused_sanitizer : Warning<"'%0' is ignored in absence of '%1'">,
+  InGroup<UnusedSanitizeArgument>;
 def warn_drv_clang_unsupported : Warning<
   "the clang compiler does not support '%0'">;
 def warn_drv_deprecated_arg : Warning<
@@ -136,6 +144,8 @@ def warn_drv_objc_gc_unsupported : Warning<
   "Objective-C garbage collection is not supported on this platform, ignoring '%0'">;
 def warn_drv_pch_not_first_include : Warning<
   "precompiled header '%0' was ignored because '%1' is not first '-include'">;
+def warn_missing_sysroot : Warning<"no such sysroot directory: '%0'">,
+  InGroup<DiagGroup<"missing-sysroot">>;
 
 def note_drv_command_failed_diag_msg : Note<
   "diagnostic msg: %0">;
diff --git a/include/clang/Basic/DiagnosticFrontendKinds.td b/include/clang/Basic/DiagnosticFrontendKinds.td
index b7a8476..111622e 100644
--- a/include/clang/Basic/DiagnosticFrontendKinds.td
+++ b/include/clang/Basic/DiagnosticFrontendKinds.td
@@ -48,8 +48,6 @@ def err_fe_unable_to_interface_with_target : Error<
     "unable to interface with target machine">;
 def err_fe_unable_to_open_output : Error<
     "unable to open output file '%0': '%1'">;
-def err_fe_unable_to_open_logfile : Error<
-    "unable to open logfile file '%0': '%1'">;
 def err_fe_pth_file_has_no_source_header : Error<
     "PTH file '%0' does not designate an original source header file for -include-pth">;
 def warn_fe_macro_contains_embedded_newline : Warning<
@@ -60,6 +58,8 @@ def warn_fe_cc_log_diagnostics_failure : Warning<
     "unable to open CC_LOG_DIAGNOSTICS file: %0 (using stderr)">;
 def err_fe_no_pch_in_dir : Error<
     "no suitable precompiled header file found in directory '%0'">;
+def err_fe_action_not_available : Error<
+    "action %0 not compiled in">;
 
 def warn_fe_serialized_diag_failure : Warning<
     "unable to open file %0 for serializing diagnostics (%1)">,
@@ -100,19 +100,19 @@ def err_relocatable_without_isysroot : Error<
 
 def warn_unknown_warning_option : Warning<
     "unknown warning option '%0'">,
-    InGroup<DiagGroup<"unknown-warning-option"> >;
+    InGroup<UnknownWarningOption>;
 def warn_unknown_negative_warning_option : Warning<
     "unknown warning option '%0'">,
-    InGroup<DiagGroup<"unknown-warning-option"> >;
+    InGroup<UnknownWarningOption>;
 def warn_unknown_warning_option_suggest : Warning<
     "unknown warning option '%0'; did you mean '%1'?">,
-    InGroup<DiagGroup<"unknown-warning-option"> >;
+    InGroup<UnknownWarningOption>;
 def warn_unknown_negative_warning_option_suggest : Warning<
     "unknown warning option '%0'; did you mean '%1'?">,
-    InGroup<DiagGroup<"unknown-warning-option"> >;
+    InGroup<UnknownWarningOption>;
 def warn_unknown_warning_specifier : Warning<
     "unknown %0 warning specifier: '%1'">,
-    InGroup<DiagGroup<"unknown-warning-option"> >;
+    InGroup<UnknownWarningOption>;
 
 def err_unknown_analyzer_checker : Error<
     "no analyzer checkers are associated with '%0'">;
@@ -129,8 +129,6 @@ def err_missing_module_name : Error<
   DefaultFatal;
 def err_missing_module : Error<
   "no module named '%0' declared in module map file '%1'">, DefaultFatal;
-def err_missing_umbrella_header : Error<
-  "cannot open umbrella header '%0': %1">, DefaultFatal;
 def err_no_submodule : Error<"no submodule named %0 in module '%1'">;
 def err_no_submodule_suggest : Error<
   "no submodule named %0 in module '%1'; did you mean '%2'?">;
@@ -139,5 +137,11 @@ def warn_missing_submodule : Warning<"missing submodule '%0'">,
 def err_module_map_temp_file : Error<
   "unable to write temporary module map file '%0'">, DefaultFatal;
 def err_module_unavailable : Error<"module '%0' requires feature '%1'">;
-
+def warn_module_config_macro_undef : Warning<
+  "%select{definition|#undef}0 of configuration macro '%1' has no effect on "
+  "the import of '%2'; pass '%select{-D%1=...|-U%1}0' on the command line "
+  "to configure the module">,
+  InGroup<ConfigMacros>;
+def note_module_def_undef_here : Note<
+  "macro was %select{defined|#undef'd}0 here">;
 }
diff --git a/include/clang/Basic/DiagnosticGroups.td b/include/clang/Basic/DiagnosticGroups.td
index f9f9ec7..a12a4f9 100644
--- a/include/clang/Basic/DiagnosticGroups.td
+++ b/include/clang/Basic/DiagnosticGroups.td
@@ -22,6 +22,8 @@ def : DiagGroup<"address">;
 def AddressOfTemporary : DiagGroup<"address-of-temporary">;
 def : DiagGroup<"aggregate-return">;
 def AmbigMemberTemplate : DiagGroup<"ambiguous-member-template">;
+def ArrayBounds : DiagGroup<"array-bounds">;
+def ArrayBoundsPointerArithmetic : DiagGroup<"array-bounds-pointer-arithmetic">;
 def Availability : DiagGroup<"availability">;
 def Section : DiagGroup<"section">;
 def AutoImport : DiagGroup<"auto-import">;
@@ -36,14 +38,17 @@ def NonLiteralNullConversion : DiagGroup<"non-literal-null-conversion">;
 def NullConversion : DiagGroup<"null-conversion">;
 def ImplicitConversionFloatingPointToBool :
   DiagGroup<"implicit-conversion-floating-point-to-bool">;
+def BadArrayNewLength : DiagGroup<"bad-array-new-length">;
+def BuiltinMacroRedefined : DiagGroup<"builtin-macro-redefined">;
 def BuiltinRequiresHeader : DiagGroup<"builtin-requires-header">;
+def C99Compat : DiagGroup<"c99-compat">;
 def CXXCompat: DiagGroup<"c++-compat">;
 def CastAlign : DiagGroup<"cast-align">;
 def : DiagGroup<"cast-qual">;
 def : DiagGroup<"char-align">;
 def Comment : DiagGroup<"comment">;
+def ConfigMacros : DiagGroup<"config-macros">;
 def : DiagGroup<"ctor-dtor-privacy">;
-def DefaultArgSpecialMember : DiagGroup<"default-arg-special-member">;
 def GNUDesignator : DiagGroup<"gnu-designator">;
 
 def DeleteNonVirtualDtor : DiagGroup<"delete-non-virtual-dtor">;
@@ -118,10 +123,18 @@ def BitwiseOpParentheses: DiagGroup<"bitwise-op-parentheses">;
 def LogicalOpParentheses: DiagGroup<"logical-op-parentheses">;
 def ShiftOpParentheses: DiagGroup<"shift-op-parentheses">;
 def DanglingElse: DiagGroup<"dangling-else">;
+def DanglingField : DiagGroup<"dangling-field">;
+def DistributedObjectModifiers : DiagGroup<"distributed-object-modifiers">;
 def IgnoredQualifiers : DiagGroup<"ignored-qualifiers">;
 def : DiagGroup<"import">;
-def IncompatiblePointerTypes : DiagGroup<"incompatible-pointer-types">;
+def IncompatiblePointerTypesDiscardsQualifiers 
+  : DiagGroup<"incompatible-pointer-types-discards-qualifiers">;
+def IncompatiblePointerTypes
+  : DiagGroup<"incompatible-pointer-types",
+    [IncompatiblePointerTypesDiscardsQualifiers]>;
 def IncompleteUmbrella : DiagGroup<"incomplete-umbrella">;
+def InvalidNoreturn : DiagGroup<"invalid-noreturn">;
+def InvalidSourceEncoding : DiagGroup<"invalid-source-encoding">;
 def KNRPromotedParameter : DiagGroup<"knr-promoted-parameter">;
 def : DiagGroup<"init-self">;
 def : DiagGroup<"inline">;
@@ -136,19 +149,23 @@ def MissingBraces : DiagGroup<"missing-braces">;
 def MissingDeclarations: DiagGroup<"missing-declarations">;
 def : DiagGroup<"missing-format-attribute">;
 def : DiagGroup<"missing-include-dirs">;
+def MissingNoreturn : DiagGroup<"missing-noreturn">;
 def MultiChar : DiagGroup<"multichar">;
 def : DiagGroup<"nested-externs">;
 def CXX11LongLong : DiagGroup<"c++11-long-long">;
 def LongLong : DiagGroup<"long-long", [CXX11LongLong]>;
+def MethodSignatures : DiagGroup<"method-signatures">;
 def MismatchedParameterTypes : DiagGroup<"mismatched-parameter-types">;
 def MismatchedReturnTypes : DiagGroup<"mismatched-return-types">;
 def MismatchedTags : DiagGroup<"mismatched-tags">;
 def MissingFieldInitializers : DiagGroup<"missing-field-initializers">;
-def ModuleBuild : DiagGroup<"module-build">;
+def ModuleConflict : DiagGroup<"module-conflict">;
+def NullArithmetic : DiagGroup<"null-arithmetic">;
 def NullCharacter : DiagGroup<"null-character">;
 def NullDereference : DiagGroup<"null-dereference">;
 def InitializerOverrides : DiagGroup<"initializer-overrides">;
 def NonNull : DiagGroup<"nonnull">;
+def NonPODVarargs : DiagGroup<"non-pod-varargs">;
 def : DiagGroup<"nonportable-cfstrings">;
 def NonVirtualDtor : DiagGroup<"non-virtual-dtor">;
 def OveralignedType : DiagGroup<"over-aligned">;
@@ -170,6 +187,7 @@ def ObjCMissingSuperCalls : DiagGroup<"objc-missing-super-calls">;
 def ObjCRetainBlockProperty : DiagGroup<"objc-noncopy-retain-block-property">;
 def ObjCReadonlyPropertyHasSetter : DiagGroup<"objc-readonly-with-setter-property">;
 def ObjCRootClass : DiagGroup<"objc-root-class">;
+def DeprecatedObjCIsaUsage : DiagGroup<"deprecated-objc-isa-usage">;
 def Packed : DiagGroup<"packed">;
 def Padded : DiagGroup<"padded">;
 def PointerArith : DiagGroup<"pointer-arith">;
@@ -179,6 +197,7 @@ def PoundPragmaMessage : DiagGroup<"#pragma-messages">,
                          DiagCategory<"#pragma message Directive">;
 def : DiagGroup<"pointer-to-int-cast">;
 def : DiagGroup<"redundant-decls">;
+def ReturnStackAddress : DiagGroup<"return-stack-address">;
 def ReturnTypeCLinkage : DiagGroup<"return-type-c-linkage">;
 def ReturnType : DiagGroup<"return-type", [ReturnTypeCLinkage]>;
 def BindToTemporaryCopy : DiagGroup<"bind-to-temporary-copy",
@@ -188,7 +207,6 @@ def SelfAssignment : DiagGroup<"self-assign", [SelfAssignmentField]>;
 def SemiBeforeMethodBody : DiagGroup<"semicolon-before-method-body">;
 def Sentinel : DiagGroup<"sentinel">;
 def MissingMethodReturnType : DiagGroup<"missing-method-return-type">;
-def : DiagGroup<"sequence-point">;
 def Shadow : DiagGroup<"shadow">;
 def Shorten64To32 : DiagGroup<"shorten-64-to-32">;
 def : DiagGroup<"sign-promo">;
@@ -197,6 +215,12 @@ def : DiagGroup<"stack-protector">;
 def : DiagGroup<"switch-default">;
 def : DiagGroup<"synth">;
 def SizeofArrayArgument : DiagGroup<"sizeof-array-argument">;
+def SizeofArrayDecay : DiagGroup<"sizeof-array-decay">;
+def SizeofPointerMemaccess : DiagGroup<"sizeof-pointer-memaccess">;
+def StaticInInline : DiagGroup<"static-in-inline">;
+def StaticLocalInInline : DiagGroup<"static-local-in-inline">;
+def GNUStaticFloatInit : DiagGroup<"gnu-static-float-init">;
+def StaticFloatInit : DiagGroup<"static-float-init", [GNUStaticFloatInit]>;
 def StringPlusInt : DiagGroup<"string-plus-int">;
 def StrncatSize : DiagGroup<"strncat-size">;
 def TautologicalOutOfRangeCompare : DiagGroup<"tautological-constant-out-of-range-compare">;
@@ -206,6 +230,10 @@ def HeaderHygiene : DiagGroup<"header-hygiene">;
 def DuplicateDeclSpecifier : DiagGroup<"duplicate-decl-specifier">;
 def CompareDistinctPointerType : DiagGroup<"compare-distinct-pointer-types">;
 
+def Unsequenced : DiagGroup<"unsequenced">;
+// GCC name for -Wunsequenced
+def : DiagGroup<"sequence-point", [Unsequenced]>;
+
 // Preprocessor warnings.
 def AmbiguousMacro : DiagGroup<"ambiguous-macro">;
 
@@ -240,17 +268,25 @@ def InvalidPPToken : DiagGroup<"invalid-pp-token">;
 def Trigraphs      : DiagGroup<"trigraphs">;
 
 def : DiagGroup<"type-limits">;
+def UndefinedReinterpretCast : DiagGroup<"undefined-reinterpret-cast">;
+def ReinterpretBaseClass : DiagGroup<"reinterpret-base-class">;
 def Unicode  : DiagGroup<"unicode">;
 def UninitializedMaybe : DiagGroup<"conditional-uninitialized">;
 def UninitializedSometimes : DiagGroup<"sometimes-uninitialized">;
-def Uninitialized  : DiagGroup<"uninitialized", [UninitializedSometimes]>;
+def UninitializedStaticSelfInit : DiagGroup<"static-self-init">;
+def Uninitialized  : DiagGroup<"uninitialized", [UninitializedSometimes,
+                                                 UninitializedStaticSelfInit]>;
 def UnknownPragmas : DiagGroup<"unknown-pragmas">;
+def UnknownWarningOption : DiagGroup<"unknown-warning-option">;
 def NSobjectAttribute : DiagGroup<"NSObject-attribute">;
 def UnknownAttributes : DiagGroup<"attributes">;
 def IgnoredAttributes : DiagGroup<"ignored-attributes">;
 def UnnamedTypeTemplateArgs : DiagGroup<"unnamed-type-template-args",
                                         [CXX98CompatUnnamedTypeTemplateArgs]>;
 def UnusedArgument : DiagGroup<"unused-argument">;
+def UnusedSanitizeArgument : DiagGroup<"unused-sanitize-argument">;
+def UnusedCommandLineArgument : DiagGroup<"unused-command-line-argument",
+                                          [UnusedSanitizeArgument]>;
 def UnusedComparison : DiagGroup<"unused-comparison">;
 def UnusedExceptionParameter : DiagGroup<"unused-exception-parameter">;
 def UnneededInternalDecl : DiagGroup<"unneeded-internal-declaration">;
@@ -293,6 +329,7 @@ def VariadicMacros : DiagGroup<"variadic-macros">;
 def VectorConversion : DiagGroup<"vector-conversion">;      // clang specific
 def VexingParse : DiagGroup<"vexing-parse">;
 def VLA : DiagGroup<"vla">;
+def VLAExtension : DiagGroup<"vla-extension">;
 def VolatileRegisterVar : DiagGroup<"volatile-register-var">;
 def Visibility : DiagGroup<"visibility">;
 def ZeroLengthArray : DiagGroup<"zero-length-array">;
@@ -379,7 +416,6 @@ def Most : DiagGroup<"most", [
     DeleteNonVirtualDtor,
     Format,
     Implicit,
-    IntToPointerCast,
     MismatchedTags,
     MissingBraces,
     MultiChar,
@@ -387,6 +423,7 @@ def Most : DiagGroup<"most", [
     ReturnType,
     SelfAssignment,
     SizeofArrayArgument,
+    SizeofArrayDecay,
     StringPlusInt,
     Trigraphs,
     Uninitialized,
@@ -407,6 +444,7 @@ def ThreadSafety : DiagGroup<"thread-safety",
                              [ThreadSafetyAttributes, 
                               ThreadSafetyAnalysis,
                               ThreadSafetyPrecise]>;
+def ThreadSafetyBeta : DiagGroup<"thread-safety-beta">;
 
 // Note that putting warnings in -Wall will not disable them by default. If a
 // warning should be active _only_ when -Wall is passed in, mark it as
@@ -449,7 +487,8 @@ def C11 : DiagGroup<"c11-extensions">;
 def C99 : DiagGroup<"c99-extensions">;
 
 // A warning group for warnings about GCC extensions.
-def GNU : DiagGroup<"gnu", [GNUDesignator, VLA, ZeroLengthArray]>;
+def GNU : DiagGroup<"gnu", [GNUDesignator, VLAExtension,
+                            ZeroLengthArray, GNUStaticFloatInit]>;
 // A warning group for warnings about code that clang accepts but gcc doesn't.
 def GccCompat : DiagGroup<"gcc-compat">;
 
@@ -460,6 +499,8 @@ def ObjCNonUnifiedException : DiagGroup<"objc-nonunified-exceptions">;
 
 def ObjCProtocolMethodImpl : DiagGroup<"objc-protocol-method-implementation">;
 
+def ObjCNoPropertyAutoSynthesis : DiagGroup<"objc-property-synthesis">;
+
 // ObjC API warning groups.
 def ObjCRedundantLiteralUse : DiagGroup<"objc-redundant-literal-use">;
 def ObjCRedundantAPIUse : DiagGroup<"objc-redundant-api-use", [
@@ -480,3 +521,6 @@ def ASMOperandWidths : DiagGroup<"asm-operand-widths">;
 def ASM : DiagGroup<"asm", [
     ASMOperandWidths
   ]>;
+
+// OpenMP warnings.
+def SourceUsesOpenMP : DiagGroup<"source-uses-openmp">;
diff --git a/include/clang/Basic/DiagnosticIDs.h b/include/clang/Basic/DiagnosticIDs.h
index 11552af..d35b907 100644
--- a/include/clang/Basic/DiagnosticIDs.h
+++ b/include/clang/Basic/DiagnosticIDs.h
@@ -15,13 +15,9 @@
 #ifndef LLVM_CLANG_DIAGNOSTICIDS_H
 #define LLVM_CLANG_DIAGNOSTICIDS_H
 
+#include "clang/Basic/LLVM.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
 #include "llvm/ADT/StringRef.h"
-#include "clang/Basic/LLVM.h"
-
-namespace llvm {
-  template<typename T, unsigned> class SmallVector;
-}
 
 namespace clang {
   class DiagnosticsEngine;
@@ -128,7 +124,7 @@ public:
 
   /// \brief Return an ID for a diagnostic with the specified message and level.
   ///
-  /// If this is the first request for this diagnosic, it is registered and
+  /// If this is the first request for this diagnostic, it is registered and
   /// created, otherwise the existing ID is returned.
   unsigned getCustomDiagID(Level L, StringRef Message);
 
@@ -231,10 +227,10 @@ public:
   /// \param Diags [out] - On return, the diagnostics in the group.
   /// \returns True if the given group is unknown, false otherwise.
   bool getDiagnosticsInGroup(StringRef Group,
-                             llvm::SmallVectorImpl<diag::kind> &Diags) const;
+                             SmallVectorImpl<diag::kind> &Diags) const;
 
   /// \brief Get the set of all diagnostic IDs.
-  void getAllDiagnostics(llvm::SmallVectorImpl<diag::kind> &Diags) const;
+  void getAllDiagnostics(SmallVectorImpl<diag::kind> &Diags) const;
 
   /// \brief Get the warning option with the closest edit distance to the given
   /// group name.
@@ -245,7 +241,7 @@ private:
   ///
   /// \param Diags [out] - On return, the diagnostics in the group.
   void getDiagnosticsInGroup(const WarningOption *Group,
-                             llvm::SmallVectorImpl<diag::kind> &Diags) const;
+                             SmallVectorImpl<diag::kind> &Diags) const;
  
   /// \brief Based on the way the client configured the DiagnosticsEngine
   /// object, classify the specified diagnostic ID into a Level, consumable by
diff --git a/include/clang/Basic/DiagnosticLexKinds.td b/include/clang/Basic/DiagnosticLexKinds.td
index c6c50ab..339788b 100644
--- a/include/clang/Basic/DiagnosticLexKinds.td
+++ b/include/clang/Basic/DiagnosticLexKinds.td
@@ -93,26 +93,63 @@ def ext_multichar_character_literal : ExtWarn<
   "multi-character character constant">, InGroup<MultiChar>;
 def ext_four_char_character_literal : Extension<
   "multi-character character constant">, InGroup<FourByteMultiChar>;
-  
 
-// Literal
-def ext_nonstandard_escape : Extension<
-  "use of non-standard escape character '\\%0'">;
-def ext_unknown_escape : ExtWarn<"unknown escape sequence '\\%0'">;
-def err_hex_escape_no_digits : Error<"\\x used with no following hex digits">;
-def err_ucn_escape_no_digits : Error<"\\u used with no following hex digits">;
-def err_ucn_escape_invalid : Error<"invalid universal character">;
-def err_ucn_escape_incomplete : Error<"incomplete universal character name">;
+
+// Unicode and UCNs
+def err_invalid_utf8 : Error<
+  "source file is not valid UTF-8">;
+def err_non_ascii : Error<
+  "non-ASCII characters are not allowed outside of literals and identifiers">;
+def ext_unicode_whitespace : ExtWarn<
+  "treating Unicode character as whitespace">,
+  InGroup<DiagGroup<"unicode-whitespace">>;
+
+def err_hex_escape_no_digits : Error<
+  "\\%0 used with no following hex digits">;
+def warn_ucn_escape_no_digits : Warning<
+  "\\%0 used with no following hex digits; "
+  "treating as '\\' followed by identifier">, InGroup<Unicode>;
+def err_ucn_escape_incomplete : Error<
+  "incomplete universal character name">;
+def warn_ucn_escape_incomplete : Warning<
+  "incomplete universal character name; "
+  "treating as '\\' followed by identifier">, InGroup<Unicode>;
+def note_ucn_four_not_eight : Note<"did you mean to use '\\u'?">;
+
 def err_ucn_escape_basic_scs : Error<
   "character '%0' cannot be specified by a universal character name">;
 def err_ucn_control_character : Error<
   "universal character name refers to a control character">;
+def err_ucn_escape_invalid : Error<"invalid universal character">;
+def warn_ucn_escape_surrogate : Warning<
+  "universal character name refers to a surrogate character">,
+  InGroup<Unicode>;
+
+def warn_c99_compat_unicode_id : Warning<
+  "%select{using this character in an identifier|starting an identifier with "
+  "this character}0 is incompatible with C99">,
+  InGroup<C99Compat>, DefaultIgnore;
+def warn_cxx98_compat_unicode_id : Warning<
+  "using this character in an identifier is incompatible with C++98">,
+  InGroup<CXX98Compat>, DefaultIgnore;
+
 def warn_cxx98_compat_literal_ucn_escape_basic_scs : Warning<
   "specifying character '%0' with a universal character name "
   "is incompatible with C++98">, InGroup<CXX98Compat>, DefaultIgnore;
 def warn_cxx98_compat_literal_ucn_control_character : Warning<
   "universal character name referring to a control character "
   "is incompatible with C++98">, InGroup<CXX98Compat>, DefaultIgnore;
+def warn_ucn_not_valid_in_c89 : Warning<
+  "universal character names are only valid in C99 or C++; "
+  "treating as '\\' followed by identifier">, InGroup<Unicode>;
+def warn_ucn_not_valid_in_c89_literal : ExtWarn<
+  "universal character names are only valid in C99 or C++">, InGroup<Unicode>;
+
+
+// Literal
+def ext_nonstandard_escape : Extension<
+  "use of non-standard escape character '\\%0'">;
+def ext_unknown_escape : ExtWarn<"unknown escape sequence '\\%0'">;
 def err_invalid_decimal_digit : Error<"invalid digit '%0' in decimal constant">;
 def err_invalid_binary_digit : Error<"invalid digit '%0' in binary constant">;
 def err_invalid_octal_digit : Error<"invalid digit '%0' in octal constant">;
@@ -145,8 +182,9 @@ def ext_string_too_long : Extension<"string literal of length %0 exceeds "
   "support">, InGroup<OverlengthStrings>;
 def err_character_too_large : Error<
   "character too large for enclosing character literal type">;
-def warn_ucn_not_valid_in_c89 : ExtWarn<
-  "unicode escape sequences are only valid in C99 or C++">, InGroup<Unicode>;
+def warn_c99_compat_unicode_literal : Warning<
+  "unicode literals are incompatible with C99">,
+  InGroup<C99Compat>, DefaultIgnore;
 def warn_cxx98_compat_unicode_literal : Warning<
   "unicode literals are incompatible with C++98">,
   InGroup<CXX98Compat>, DefaultIgnore;
@@ -175,12 +213,12 @@ def err_bad_string_encoding : Error<
   "illegal character encoding in string literal">;
 def warn_bad_string_encoding : ExtWarn<
   "illegal character encoding in string literal">,
-  InGroup<DiagGroup<"invalid-source-encoding">>;
+  InGroup<InvalidSourceEncoding>;
 def err_bad_character_encoding : Error<
   "illegal character encoding in character literal">;
 def warn_bad_character_encoding : ExtWarn<
   "illegal character encoding in character literal">,
-  InGroup<DiagGroup<"invalid-source-encoding">>;
+  InGroup<InvalidSourceEncoding>;
 def err_lexing_string : Error<"failure when lexing a string">;
 
 
@@ -218,9 +256,10 @@ def pp_pragma_sysheader_in_main_file : Warning<
 def pp_poisoning_existing_macro : Warning<"poisoning existing macro">;
 def pp_out_of_date_dependency : Warning<
   "current file is older than dependency %0">;
-def pp_undef_builtin_macro : Warning<"undefining builtin macro">;
-def pp_redef_builtin_macro : Warning<"redefining builtin macro">,
-  InGroup<DiagGroup<"builtin-macro-redefined">>;
+def ext_pp_undef_builtin_macro : ExtWarn<"undefining builtin macro">,
+  InGroup<BuiltinMacroRedefined>;
+def ext_pp_redef_builtin_macro : ExtWarn<"redefining builtin macro">,
+  InGroup<BuiltinMacroRedefined>;
 def pp_disabled_macro_expansion : Warning<
   "disabled expansion of recursive macro">, DefaultIgnore,
   InGroup<DiagGroup<"disabled-macro-expansion">>;
@@ -284,7 +323,12 @@ def warn_cxx98_compat_empty_fnmacro_arg : Warning<
   InGroup<CXX98CompatPedantic>, DefaultIgnore;
 def note_macro_here : Note<"macro %0 defined here">;
 
+def err_pp_opencl_variadic_macros :
+  Error<"variadic macros not supported in OpenCL">;
+
 def err_pp_invalid_directive : Error<"invalid preprocessing directive">;
+def err_pp_directive_required : Error<
+  "%0 must be used within a preprocessing directive">;
 def err_pp_file_not_found : Error<"'%0' file not found">, DefaultFatal;
 def err_pp_file_not_found_not_fatal : Error<
   "'%0' file not found with <angled> include; use \"quotes\" instead">;
@@ -486,6 +530,16 @@ def err_mmap_umbrella_clash : Error<
   "umbrella for module '%0' already covers this directory">;
 def err_mmap_export_module_id : Error<
   "expected an exported module name or '*'">;
+def err_mmap_expected_library_name : Error<
+  "expected %select{library|framework}0 name as a string">;
+def err_mmap_config_macro_submodule : Error<
+  "configuration macros are only allowed on top-level modules">;
+def err_mmap_expected_config_macro : Error<
+  "expected configuration macro name after ','">;
+def err_mmap_expected_conflicts_comma : Error<
+  "expected ',' after conflicting module name">;
+def err_mmap_expected_conflicts_message : Error<
+  "expected a message describing the conflict with '%0'">;
 def err_mmap_missing_module_unqualified : Error<
   "no module named '%0' visible from '%1'">;
 def err_mmap_missing_module_qualified : Error<
@@ -521,7 +575,8 @@ def warn_auto_module_import : Warning<
   "treating #%select{include|import|include_next|__include_macros}0 as an "
   "import of module '%1'">, InGroup<AutoImport>, DefaultIgnore;
 def warn_uncovered_module_header : Warning<
-  "umbrella header does not include header '%0'">, InGroup<IncompleteUmbrella>;
+  "umbrella header for module '%0' does not include header '%1'">, 
+  InGroup<IncompleteUmbrella>;
 def err_expected_id_building_module : Error<
   "expected a module name in '__building_module' expression">;
   
diff --git a/include/clang/Basic/DiagnosticOptions.def b/include/clang/Basic/DiagnosticOptions.def
index 476ac1e..8e5562c 100644
--- a/include/clang/Basic/DiagnosticOptions.def
+++ b/include/clang/Basic/DiagnosticOptions.def
@@ -54,6 +54,7 @@ DIAGOPT(ShowCarets, 1, 1)       /// Show carets in diagnostics.
 DIAGOPT(ShowFixits, 1, 1)       /// Show fixit information.
 DIAGOPT(ShowSourceRanges, 1, 0) /// Show source ranges in numeric form.
 DIAGOPT(ShowParseableFixits, 1, 0) /// Show machine parseable fix-its.
+DIAGOPT(ShowPresumedLoc, 1, 0)  /// Show presumed location for diagnostics.
 DIAGOPT(ShowOptionNames, 1, 0)  /// Show the option name for mappable
                                 /// diagnostics.
 DIAGOPT(ShowNoteIncludeStack, 1, 0) /// Show include stacks for notes.
@@ -71,6 +72,7 @@ DIAGOPT(VerifyDiagnostics, 1, 0) /// Check that diagnostics match the expected
 
 DIAGOPT(ElideType, 1, 0)         /// Elide identical types in template diffing
 DIAGOPT(ShowTemplateTree, 1, 0)  /// Print a template tree when diffing
+DIAGOPT(WarnOnSpellCheck, 1, 0)  /// -fwarn-on-spellcheck
 
 VALUE_DIAGOPT(ErrorLimit, 32, 0)           /// Limit # errors emitted.
 /// Limit depth of macro expansion backtrace.
diff --git a/include/clang/Basic/DiagnosticOptions.h b/include/clang/Basic/DiagnosticOptions.h
index b75cb0c..2fba384 100644
--- a/include/clang/Basic/DiagnosticOptions.h
+++ b/include/clang/Basic/DiagnosticOptions.h
@@ -10,8 +10,8 @@
 #ifndef LLVM_CLANG_BASIC_DIAGNOSTICOPTIONS_H
 #define LLVM_CLANG_BASIC_DIAGNOSTICOPTIONS_H
 
+#include "clang/Basic/LLVM.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
-
 #include <string>
 #include <vector>
 
@@ -24,9 +24,8 @@ enum OverloadsShown {
   Ovl_Best  ///< Show just the "best" overload candidates.
 };
 
-/// DiagnosticOptions - Options for controlling the compiler diagnostics
-/// engine.
-class DiagnosticOptions : public llvm::RefCountedBase<DiagnosticOptions>{
+/// \brief Options for controlling the compiler diagnostics engine.
+class DiagnosticOptions : public RefCountedBase<DiagnosticOptions>{
 public:
   enum TextDiagnosticFormat { Clang, Msvc, Vi };
 
@@ -49,14 +48,10 @@ protected:
 #include "clang/Basic/DiagnosticOptions.def"
 
 public:
-  /// If non-empty, a file to log extended build information to, for development
-  /// testing and analysis.
-  std::string DumpBuildInformation;
-
-  /// The file to log diagnostic output to.
+  /// \brief The file to log diagnostic output to.
   std::string DiagnosticLogFile;
   
-  /// The file to serialize diagnostics to (non-appending).
+  /// \brief The file to serialize diagnostics to (non-appending).
   std::string DiagnosticSerializationFile;
 
   /// The list of -W... options used to alter the diagnostic mappings, with the
diff --git a/include/clang/Basic/DiagnosticParseKinds.td b/include/clang/Basic/DiagnosticParseKinds.td
index 21eeccb..04a433c 100644
--- a/include/clang/Basic/DiagnosticParseKinds.td
+++ b/include/clang/Basic/DiagnosticParseKinds.td
@@ -18,9 +18,6 @@ def w_asm_qualifier_ignored : Warning<"ignored %0 qualifier on asm">,
 def warn_file_asm_volatile : Warning<
   "meaningless 'volatile' on asm outside function">, CatInlineAsm;
 
-def warn_unsupported_msasm : Warning<
-  "MS-style inline assembly is not supported">, InGroup<Microsoft>;
-
 let CategoryName = "Parse Issue" in {
 
 def ext_empty_translation_unit : Extension<
@@ -98,6 +95,8 @@ def warn_cxx98_compat_enum_fixed_underlying_type : Warning<
 def warn_cxx98_compat_alignof : Warning<
   "alignof expressions are incompatible with C++98">,
   InGroup<CXX98Compat>, DefaultIgnore;
+def ext_alignof_expr : ExtWarn<
+  "%0 applied to an expression is a GNU extension">, InGroup<GNU>;
 
 def warn_microsoft_dependent_exists : Warning<
   "dependent %select{__if_not_exists|__if_exists}0 declarations are ignored">, 
@@ -113,6 +112,9 @@ def note_previous_default_assoc : Note<
 def ext_c11_alignment : Extension<
   "%0 is a C11-specific feature">, InGroup<C11>;
 
+def ext_c11_noreturn : Extension<
+  "_Noreturn functions are a C11-specific feature">, InGroup<C11>;
+
 def ext_gnu_indirect_goto : Extension<
   "use of GNU indirect-goto extension">, InGroup<GNU>;
 def ext_gnu_address_of_label : Extension<
@@ -225,13 +227,10 @@ def note_missing_selector_name : Note<
 def note_force_empty_selector_name : Note<
   "or insert whitespace before ':' to use %0 as parameter name "
   "and have an empty entry in the selector">;
-def note_missing_argument_name : Note<
-  "did you mean to use %0 as the selector name instead of %1">;
 def err_label_end_of_compound_statement : Error<
   "label at end of compound statement: expected statement">;
 def err_address_of_label_outside_fn : Error<
   "use of address-of-label extension outside of a function body">;
-def err_expected_string_literal : Error<"expected string literal">;
 def err_asm_operand_wide_string_literal : Error<
   "cannot use %select{unicode|wide}0 string literal in 'asm'">;
 def err_expected_selector_for_method : Error<
@@ -364,7 +363,7 @@ def note_objc_container_start : Note<
   "%select{class|protocol|category|class extension|implementation"
   "|category implementation}0 started here">;
 def warn_objc_protocol_qualifier_missing_id : Warning<
-  "protocol qualifiers without 'id' is archaic">;
+  "protocol has no object type specified; defaults to qualified 'id'">;
 def err_objc_unknown_at : Error<"expected an Objective-C directive after '@'">;
 def err_illegal_super_cast : Error<
   "cannot cast 'super' (it isn't an expression)">;
@@ -400,6 +399,11 @@ def err_objc_properties_require_objc2 : Error<
   "properties are an Objective-C 2 feature">;
 def err_objc_unexpected_attr : Error<
   "prefix attribute must be followed by an interface or protocol">;
+def err_objc_postfix_attribute : Error <
+  "postfix attributes are not allowed on Objective-C directives">;
+def err_objc_postfix_attribute_hint : Error <
+  "postfix attributes are not allowed on Objective-C directives, place"
+  " them in front of '%select{@interface|@protocol}0'">;
 def err_objc_directive_only_in_protocol : Error<
   "directive may only be specified in protocols only">;
 def err_missing_catch_finally : Error<
@@ -407,6 +411,8 @@ def err_missing_catch_finally : Error<
 def err_objc_concat_string : Error<"unexpected token after Objective-C string">;
 def err_expected_objc_container : Error<
   "'@end' must appear in an Objective-C context">;
+def err_objc_unexpected_atend : Error<
+  "'@end' appears where closing brace '}' is expected">;
 def error_property_ivar_decl : Error<
   "property synthesize requires specification of an ivar">;
 def err_synthesized_property_name : Error<
@@ -425,6 +431,8 @@ def err_declaration_does_not_declare_param : Error<
 def err_no_matching_param : Error<"parameter named %0 is missing">;
 
 /// C++ parser diagnostics
+def err_invalid_operator_on_type : Error<
+  "cannot use %select{dot|arrow}0 operator on a type">;
 def err_expected_unqualified_id : Error<
   "expected %select{identifier|unqualified-id}0">;
 def err_func_def_no_params : Error<
@@ -464,11 +472,16 @@ def err_destructor_template_id : Error<
   "destructor name %0 does not refer to a template">;
 def err_default_arg_unparsed : Error<
   "unexpected end of default argument expression">;
-def err_parser_impl_limit_overflow : Error<
-  "parser recursion limit reached, program too complex">, DefaultFatal;
+def err_bracket_depth_exceeded : Error<
+  "bracket nesting level exceeded maximum of %0">, DefaultFatal;
+def note_bracket_depth : Note<
+  "use -fbracket-depth=N to increase maximum nesting level">;
 def err_misplaced_ellipsis_in_declaration : Error<
   "'...' must %select{immediately precede declared identifier|"
   "be innermost component of anonymous pack declaration}0">;
+def ext_abstract_pack_declarator_parens : ExtWarn<
+  "ISO C++11 requires a parenthesized pack declaration to have a name">,
+  InGroup<DiagGroup<"anonymous-pack-parens">>;
 
 // C++ derived classes
 def err_dup_virtual : Error<"duplicate 'virtual' in base specifier">;
@@ -504,12 +517,12 @@ def err_cxx11_attribute_forbids_arguments : Error<
   "attribute '%0' cannot have an argument list">;
 def err_cxx11_attribute_forbids_ellipsis : Error<
   "attribute '%0' cannot be used as an attribute pack">;
+def err_cxx11_attribute_repeated : Error<
+  "attribute %0 cannot appear multiple times in an attribute specifier">;
 def err_attributes_not_allowed : Error<"an attribute list cannot appear here">;
 def err_l_square_l_square_not_attribute : Error<
   "C++11 only allows consecutive left square brackets when "
   "introducing an attribute">;
-def err_alignas_pack_exp_unsupported : Error<
-  "pack expansions in alignment specifiers are not supported yet">;
 def err_ms_declspec_type : Error<
   "__declspec attributes must be an identifier or string literal">;
 def warn_ms_declspec_unknown : Warning<
@@ -548,7 +561,6 @@ def err_explicit_instantiation_with_definition : Error<
     "explicit template instantiation cannot have a definition; if this "
     "definition is meant to be an explicit specialization, add '<>' after the "
     "'template' keyword">;
-def err_enum_template : Error<"enumeration cannot be a template">;
 def err_explicit_instantiation_enum : Error<
     "enumerations cannot be explicitly instantiated">;
 def err_expected_template_parameter : Error<"expected template parameter">;
@@ -764,14 +776,25 @@ def err_seh___except_filter : Error<
 
 def err_seh___finally_block : Error<
   "%0 only allowed in __finally block">;
-  
+
+// OpenMP support.
+def warn_pragma_omp_ignored : Warning <
+  "unexpected '#pragma omp ...' in program">, InGroup<SourceUsesOpenMP>, DefaultIgnore;
+def warn_omp_extra_tokens_at_eol : Warning <
+  "extra tokens at end of '#pragma omp %0' are ignored">,
+  InGroup<ExtraTokens>;
+def err_omp_unknown_directive : Error <
+  "expected an OpenMP directive">;
+def err_omp_unexpected_directive : Error <
+  "unexpected OpenMP directive '#pragma omp %0'">;
+
 } // end of Parse Issue category.
 
 let CategoryName = "Modules Issue" in {
 def err_module_expected_ident : Error<
   "expected a module name after module import">;
 def err_module_expected_semi : Error<
-  "expected a semicolon name after module name">;
+  "expected ';' after module name">;
 }
 
 } // end of Parser diagnostics
diff --git a/include/clang/Basic/DiagnosticSemaKinds.td b/include/clang/Basic/DiagnosticSemaKinds.td
index 0d64bf3..c4815cd 100644
--- a/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/include/clang/Basic/DiagnosticSemaKinds.td
@@ -20,6 +20,11 @@ def warn_variables_not_in_loop_body : Warning<
   "used in loop condition not modified in loop body">,
   InGroup<DiagGroup<"loop-analysis">>, DefaultIgnore;
 
+def warn_duplicate_enum_values : Warning<
+  "element %0 has been implicitly assigned %1 which another element has "
+  "been assigned">, InGroup<DiagGroup<"duplicate-enum">>, DefaultIgnore;
+def note_duplicate_element : Note<"element %0 also has value %1">;
+
 // Constant expressions
 def err_expr_not_ice : Error<
   "expression is not an %select{integer|integral}0 constant expression">;
@@ -70,7 +75,9 @@ def warn_double_const_requires_fp64 : Warning<
 
 // C99 variable-length arrays
 def ext_vla : Extension<"variable length arrays are a C99 feature">,
-  InGroup<VLA>;
+  InGroup<VLAExtension>;
+def warn_vla_used : Warning<"variable length array used">,
+  InGroup<VLA>, DefaultIgnore;
 def err_vla_non_pod : Error<"variable length array of non-POD element type %0">;
 def err_vla_in_sfinae : Error<
   "variable length array cannot be formed during template argument deduction">;
@@ -209,6 +216,8 @@ def warn_use_out_of_scope_declaration : Warning<
   "use of out-of-scope declaration of %0">;
 def err_inline_non_function : Error<
   "'inline' can only appear on functions">;
+def err_noreturn_non_function : Error<
+  "'_Noreturn' can only appear on functions">;
 def warn_qual_return_type : Warning< 
   "'%0' type qualifier%s1 on return type %plural{1:has|:have}1 no effect">,
   InGroup<IgnoredQualifiers>, DefaultIgnore;
@@ -245,19 +254,20 @@ def note_using_decl_constructor_conflict_previous_ctor : Note<
   "previous constructor">;
 def note_using_decl_constructor_conflict_previous_using : Note<
   "previously inherited here">;
+def warn_using_decl_constructor_ellipsis : Warning<
+  "inheriting constructor does not inherit ellipsis">,
+  InGroup<DiagGroup<"inherited-variadic-ctor">>;
+def note_using_decl_constructor_ellipsis : Note<
+  "constructor declared with ellipsis here">;
 def err_using_decl_can_not_refer_to_class_member : Error<
   "using declaration can not refer to class member">;
 def err_using_decl_can_not_refer_to_namespace : Error<
   "using declaration can not refer to namespace">;
 def err_using_decl_constructor : Error<
   "using declaration can not refer to a constructor">;
-def err_using_decl_constructor_unsupported : Error<
-  "inheriting constructors are not supported">;
-// FIXME: Replace the above error with this warning if support for
-//        inheriting constructors is implemented.
-//def warn_cxx98_compat_using_decl_constructor : Warning<
-//  "inheriting constructors are incompatible with C++98">,
-//  InGroup<CXX98Compat>, DefaultIgnore;
+def warn_cxx98_compat_using_decl_constructor : Warning<
+  "inheriting constructors are incompatible with C++98">,
+  InGroup<CXX98Compat>, DefaultIgnore;
 def err_using_decl_destructor : Error<
   "using declaration can not refer to a destructor">;
 def err_using_decl_template_id : Error<
@@ -304,10 +314,10 @@ def err_falloff_nonvoid_block : Error<
   "control reaches end of non-void block">;
 def warn_suggest_noreturn_function : Warning<
   "%select{function|method}0 %1 could be declared with attribute 'noreturn'">,
-  InGroup<DiagGroup<"missing-noreturn">>, DefaultIgnore;
+  InGroup<MissingNoreturn>, DefaultIgnore;
 def warn_suggest_noreturn_block : Warning<
   "block could be declared with attribute 'noreturn'">,
-  InGroup<DiagGroup<"missing-noreturn">>, DefaultIgnore;
+  InGroup<MissingNoreturn>, DefaultIgnore;
 def warn_unreachable : Warning<"will never be executed">,
   InGroup<DiagGroup<"unreachable-code">>, DefaultIgnore;
 
@@ -331,7 +341,8 @@ def warn_implicit_decl_requires_ucontext : Warning<
   "<ucontext.h>">,
   InGroup<BuiltinRequiresHeader>;
 def warn_redecl_library_builtin : Warning<
-  "incompatible redeclaration of library function %0">;
+  "incompatible redeclaration of library function %0">,
+  InGroup<DiagGroup<"incompatible-library-redeclaration">>;
 def err_builtin_definition : Error<"definition of builtin function %0">;
 def err_types_compatible_p_in_cplusplus : Error<
   "__builtin_types_compatible_p is not valid in C++">;
@@ -347,7 +358,7 @@ def note_bad_memaccess_silence : Note<
 def warn_sizeof_pointer_expr_memaccess : Warning<
   "'%0' call operates on objects of type %1 while the size is based on a " 
   "different type %2">, 
-  InGroup<DiagGroup<"sizeof-pointer-memaccess">>;
+  InGroup<SizeofPointerMemaccess>;
 def warn_sizeof_pointer_expr_memaccess_note : Note<
   "did you mean to %select{dereference the argument to 'sizeof' (and multiply "
   "it by the number of elements)|remove the addressof in the argument to "
@@ -356,7 +367,7 @@ def warn_sizeof_pointer_expr_memaccess_note : Note<
 def warn_sizeof_pointer_type_memaccess : Warning<
   "argument to 'sizeof' in %0 call is the same pointer type %1 as the "
   "%select{destination|source}2; expected %3 or an explicit length">,
-  InGroup<DiagGroup<"sizeof-pointer-memaccess">>;
+  InGroup<SizeofPointerMemaccess>;
 def warn_strlcpycat_wrong_size : Warning<
   "size argument in %0 call appears to be size of the source; expected the size of "
   "the destination">,
@@ -376,17 +387,21 @@ def note_strncat_wrong_size : Note<
   "the terminating null byte">;
 
 /// main()
-// static/inline main() are not errors in C, just in C++.
+// static main() is not an error in C, just in C++.
 def warn_static_main : Warning<"'main' should not be declared static">,
     InGroup<Main>;
 def err_static_main : Error<"'main' is not allowed to be declared static">;
 def err_inline_main : Error<"'main' is not allowed to be declared inline">;
+def ext_noreturn_main : ExtWarn<
+  "'main' is not allowed to be declared _Noreturn">, InGroup<Main>;
+def note_main_remove_noreturn : Note<"remove '_Noreturn'">;
 def err_constexpr_main : Error<
   "'main' is not allowed to be declared constexpr">;
 def err_main_template_decl : Error<"'main' cannot be a template">;
 def err_main_returns_nonint : Error<"'main' must return 'int'">;
 def ext_main_returns_nonint : ExtWarn<"return type of 'main' is not 'int'">,
     InGroup<MainReturnType>;
+def note_main_change_return_type : Note<"change return type to 'int'">;
 def err_main_surplus_args : Error<"too many parameters (%0) for 'main': "
     "must be 0, 2, or 3">;
 def warn_main_one_arg : Warning<"only one parameter on 'main' declaration">,
@@ -396,6 +411,8 @@ def err_main_arg_wrong : Error<"%select{first|second|third|fourth}0 "
     "platform-specific data}0) must be of type %1">;
 
 /// parser diagnostics
+def ext_no_declarators : ExtWarn<"declaration does not declare anything">,
+  InGroup<MissingDeclarations>;
 def ext_typedef_without_a_name : ExtWarn<"typedef requires a name">,
   InGroup<MissingDeclarations>;
 def err_typedef_not_identifier : Error<"typedef name must be an identifier">;
@@ -406,6 +423,15 @@ def err_object_cannot_be_passed_returned_by_value : Error<
   "; did you forget * in %1?">;
 def err_parameters_retval_cannot_have_fp16_type : Error<
   "%select{parameters|function return value}0 cannot have __fp16 type; did you forget * ?">;
+def err_opencl_half_load_store : Error<
+  "%select{loading directly from|assigning directly to}0 pointer to type %1 is not allowed">;
+def err_opencl_cast_to_half : Error<"casting to type %0 is not allowed">;
+def err_opencl_half_declaration : Error<
+  "declaring variable of type %0 is not allowed">;
+def err_opencl_half_argument : Error<
+  "declaring function argument of type %0 is not allowed; did you forget * ?">;
+def err_opencl_half_return : Error<
+  "declaring function return value of type %0 is not allowed; did you forget * ?">;
 def warn_enum_value_overflow : Warning<"overflow in enumeration value">;
 def warn_pragma_options_align_reset_failed : Warning<
   "#pragma options align=reset failed: %0">;
@@ -456,7 +482,7 @@ def warn_readonly_property : Warning<
   "'readwrite' of property inherited from %1">;
 
 def warn_property_attribute : Warning<
-  "property %0 '%1' attribute does not match the property inherited from %2">;
+  "'%1' attribute on property %0 does not match the property inherited from %2">;
 def warn_property_types_are_incompatible : Warning<
   "property type %0 is incompatible with type %1 inherited from %2">;
 def err_undef_interface : Error<"cannot find interface declaration for %0">;
@@ -499,9 +525,8 @@ def err_conflicting_ivar_name : Error<
   "conflicting instance variable names: %0 vs %1">;
 def err_inconsistant_ivar_count : Error<
   "inconsistent number of instance variables specified">;
-def warn_incomplete_impl : Warning<"incomplete implementation">,
+def warn_undef_method_impl : Warning<"method definition for %0 not found">,
   InGroup<DiagGroup<"incomplete-implementation">>;
-def note_undef_method_impl : Note<"method definition for %0 not found">;
 def note_required_for_protocol_at : 
   Note<"required for direct or indirect protocol %0">;
 
@@ -523,7 +548,7 @@ def warn_conflicting_overriding_ret_type_modifiers : Warning<
 def warn_conflicting_ret_type_modifiers : Warning<
   "conflicting distributed object modifiers on return type "
   "in implementation of %0">,
-  InGroup<DiagGroup<"distributed-object-modifiers">>;
+  InGroup<DistributedObjectModifiers>;
 
 def warn_non_covariant_overriding_ret_types : Warning<
   "conflicting return type in "
@@ -533,7 +558,7 @@ def warn_non_covariant_overriding_ret_types : Warning<
 def warn_non_covariant_ret_types : Warning<
   "conflicting return type in "
   "implementation of %0: %1 vs %2">,
-  InGroup<DiagGroup<"method-signatures">>, DefaultIgnore;
+  InGroup<MethodSignatures>, DefaultIgnore;
 
 def warn_conflicting_overriding_param_types : Warning<
   "conflicting parameter types in "
@@ -548,7 +573,7 @@ def warn_conflicting_param_types : Warning<
 def warn_conflicting_param_modifiers : Warning<
   "conflicting distributed object modifiers on parameter type "
   "in implementation of %0">,
-  InGroup<DiagGroup<"distributed-object-modifiers">>;
+  InGroup<DistributedObjectModifiers>;
 
 def warn_conflicting_overriding_param_modifiers : Warning<
   "conflicting distributed object modifiers on parameter type "
@@ -563,7 +588,7 @@ def warn_non_contravariant_overriding_param_types : Warning<
 def warn_non_contravariant_param_types : Warning<
   "conflicting parameter types in "
   "implementation of %0: %1 vs %2">,
-  InGroup<DiagGroup<"method-signatures">>, DefaultIgnore;
+  InGroup<MethodSignatures>, DefaultIgnore;
 
 def warn_conflicting_overriding_variadic :Warning<
   "conflicting variadic declaration of method and its "
@@ -609,9 +634,11 @@ def warn_objc_property_no_assignment_attribute : Warning<
   "'assign' is assumed">,
   InGroup<ObjCPropertyNoAttribute>;
 def warn_objc_isa_use : Warning<
-  "direct access to objective-c's isa is deprecated "
-  "in favor of object_setClass() and object_getClass()">,
-  InGroup<DiagGroup<"deprecated-objc-isa-usage">>;
+  "direct access to Objective-C's isa is deprecated in favor of "
+  "object_getClass()">, InGroup<DeprecatedObjCIsaUsage>;
+def warn_objc_isa_assign : Warning<
+  "assignment to Objective-C's isa is deprecated in favor of "
+  "object_setClass()">, InGroup<DeprecatedObjCIsaUsage>;
 def warn_objc_property_default_assign_on_object : Warning<
   "default property attribute 'assign' not appropriate for non-GC object">,
   InGroup<ObjCPropertyNoAttribute>;
@@ -643,6 +670,15 @@ def warn_auto_synthesizing_protocol_property :Warning<
   "auto property synthesis will not synthesize property"
   " declared in a protocol">,
   InGroup<DiagGroup<"objc-protocol-property-synthesis">>;
+def warn_no_autosynthesis_shared_ivar_property : Warning <
+  "auto property synthesis will not synthesize property "
+  "'%0' because it cannot share an ivar with another synthesized property">,
+  InGroup<ObjCNoPropertyAutoSynthesis>;
+def warn_no_autosynthesis_property : Warning<
+  "auto property synthesis will not synthesize property "
+  "'%0' because it is 'readwrite' but it will be synthesized 'readonly' "
+  "via another property">,
+  InGroup<ObjCNoPropertyAutoSynthesis>;
 def warn_autosynthesis_property_ivar_match :Warning<
   "autosynthesized property %0 will use %select{|synthesized}1 instance variable "
   "%2, not existing instance variable %3">,
@@ -684,6 +720,8 @@ def error_category_property : Error<
   "class implementation">;
 def note_property_declare : Note<
   "property declared here">;
+def note_property_synthesize : Note<
+  "property synthesized here">;
 def error_synthesize_category_decl : Error<
   "@synthesize not allowed in a category's implementation">;
 def error_reference_property : Error<
@@ -762,9 +800,9 @@ def warn_undeclared_selector : Warning<
 def warn_implicit_atomic_property : Warning<
   "property is assumed atomic by default">, InGroup<ImplicitAtomic>, DefaultIgnore;
 def note_auto_readonly_iboutlet_fixup_suggest : Note<
-  "readonly IBOutlet property should be changed to be readwrite">;
+  "property should be changed to be readwrite">;
 def warn_auto_readonly_iboutlet_property : Warning<
-  "readonly IBOutlet property when auto-synthesized may "
+  "readonly IBOutlet property '%0' when auto-synthesized may "
   "not work correctly with 'nib' loader">,
   InGroup<DiagGroup<"readonly-iboutlet-property">>;
 def warn_auto_implicit_atomic_property : Warning<
@@ -829,6 +867,8 @@ def err_friend_def_in_local_class : Error<
   "friend function cannot be defined in a local class">;
 def err_friend_not_first_in_declaration : Error<
   "'friend' must appear first in a non-function declaration">;
+def err_using_decl_friend : Error<
+  "cannot befriend target of using declaration">;
   
 def err_invalid_member_in_interface : Error<
   "%select{data member |non-public member function |static member function |"
@@ -892,6 +932,8 @@ def err_distant_exception_spec : Error<
 def err_incomplete_in_exception_spec : Error<
   "%select{|pointer to |reference to }0incomplete type %1 is not allowed "
   "in exception specification">;
+def err_rref_in_exception_spec : Error<
+  "rvalue reference type %0 is not allowed in exception specification">;
 def err_mismatched_exception_spec : Error<
   "exception specification in declaration does not match previous declaration">;
 def warn_mismatched_exception_spec : ExtWarn<
@@ -1063,14 +1105,18 @@ def note_field_decl : Note<"member is declared here">;
 def note_ivar_decl : Note<"instance variable is declared here">;
 def note_bitfield_decl : Note<"bit-field is declared here">;
 def note_previous_decl : Note<"%0 declared here">;
+def note_implicit_param_decl : Note<"%0 is an implicit parameter">;
 def note_member_synthesized_at : Note<
   "implicit default %select{constructor|copy constructor|move constructor|copy "
   "assignment operator|move assignment operator|destructor}0 for %1 first "
   "required here">;
+def note_inhctor_synthesized_at : Note<
+  "inheriting constructor for %0 first required here">;
 def err_missing_default_ctor : Error<
-  "%select{|implicit default }0constructor for %1 must explicitly initialize "
-  "the %select{base class|member}2 %3 which does not have a default "
+  "%select{|implicit default |inheriting }0constructor for %1 must explicitly "
+  "initialize the %select{base class|member}2 %3 which does not have a default "
   "constructor">;
+
 def err_illegal_union_or_anon_struct_member : Error<
   "%select{anonymous struct|union}0 member %1 has a non-trivial "
   "%select{constructor|copy constructor|move constructor|copy assignment "
@@ -1080,16 +1126,38 @@ def warn_cxx98_compat_nontrivial_union_or_anon_struct_member : Warning<
   "%select{constructor|copy constructor|move constructor|copy assignment "
   "operator|move assignment operator|destructor}2 is incompatible with C++98">,
   InGroup<CXX98Compat>, DefaultIgnore;
+
+def note_nontrivial_virtual_dtor : Note<
+  "destructor for %0 is not trivial because it is virtual">;
 def note_nontrivial_has_virtual : Note<
   "because type %0 has a virtual %select{member function|base class}1">;
-def note_nontrivial_has_nontrivial : Note<
-  "because type %0 has a %select{member|base class}1 with a non-trivial "
-  "%select{constructor|copy constructor|move constructor|copy assignment "
-  "operator|move assignment operator|destructor}2">;
-def note_nontrivial_user_defined : Note<
-  "because type %0 has a user-declared %select{constructor|copy constructor|"
-  "move constructor|copy assignment operator|move assignment operator|"
-  "destructor}1">;
+def note_nontrivial_no_def_ctor : Note<
+  "because %select{base class of |field of |}0type %1 has no "
+  "default constructor">;
+def note_user_declared_ctor : Note<
+  "implicit default constructor suppressed by user-declared constructor">;
+def note_nontrivial_no_copy : Note<
+  "because no %select{<<ERROR>>|constructor|constructor|assignment operator|"
+  "assignment operator|<<ERROR>>}2 can be used to "
+  "%select{<<ERROR>>|copy|move|copy|move|<<ERROR>>}2 "
+  "%select{base class|field|an object}0 of type %3">;
+def note_nontrivial_user_provided : Note<
+  "because %select{base class of |field of |}0type %1 has a user-provided "
+  "%select{default constructor|copy constructor|move constructor|"
+  "copy assignment operator|move assignment operator|destructor}2">;
+def note_nontrivial_in_class_init : Note<
+  "because field %0 has an initializer">;
+def note_nontrivial_param_type : Note<
+  "because its parameter is %diff{of type $, not $|of the wrong type}2,3">;
+def note_nontrivial_default_arg : Note<"because it has a default argument">;
+def note_nontrivial_variadic : Note<"because it is a variadic function">;
+def note_nontrivial_subobject : Note<
+  "because the function selected to %select{construct|copy|move|copy|move|"
+  "destroy}2 %select{base class|field}0 of type %1 is not trivial">;
+def note_nontrivial_objc_ownership : Note<
+  "because type %0 has a member with %select{no|no|__strong|__weak|"
+  "__autoreleasing}1 ownership">;
+
 def err_static_data_member_not_allowed_in_anon_struct : Error<
   "static data member %0 not allowed in anonymous struct">;
 def ext_static_data_member_in_union : ExtWarn<
@@ -1100,14 +1168,17 @@ def warn_cxx98_compat_static_data_member_in_union : Warning<
 def err_union_member_of_reference_type : Error<
   "union member %0 has reference type %1">;
 def ext_anonymous_struct_union_qualified : Extension<
-  "anonymous %select{struct|union}0 cannot be '%select{const|volatile|"
-  "restrict}1'">;
+  "anonymous %select{struct|union}0 cannot be '%1'">;
 def err_different_return_type_for_overriding_virtual_function : Error<
   "virtual function %0 has a different return type "
   "%diff{($) than the function it overrides (which has return type $)|"
   "than the function it overrides}1,2">;
 def note_overridden_virtual_function : Note<
   "overridden virtual function is here">;
+def err_conflicting_overriding_cc_attributes : Error<
+  "virtual function %0 has different calling convention attributes "
+  "%diff{($) than the function it overrides (which has calling convention $)|"
+  "than the function it overrides}1,2">;
 
 def err_covariant_return_inaccessible_base : Error<
   "invalid covariant return for virtual function: %1 is a "
@@ -1236,6 +1307,8 @@ def err_reference_var_requires_init : Error<
   "declaration of reference variable %0 requires an initializer">;
 def err_reference_without_init : Error<
   "reference to type %0 requires an initializer">;
+def note_value_initialization_here : Note<
+  "in value-initialization of type %0 here">;
 def err_reference_has_multiple_inits : Error<
   "reference cannot be initialized with multiple values">;
 def err_init_non_aggr_init_list : Error<
@@ -1249,6 +1322,9 @@ def warn_field_is_uninit : Warning<"field %0 is uninitialized when used here">,
 def warn_reference_field_is_uninit : Warning<
   "reference %0 is not yet bound to a value when used here">,
   InGroup<Uninitialized>;
+def warn_static_self_reference_in_init : Warning<
+  "static variable %0 is suspiciously used within its own initialization">,
+  InGroup<UninitializedStaticSelfInit>;
 def warn_uninit_self_reference_in_init : Warning<
   "variable %0 is uninitialized when used within its own initialization">,
   InGroup<Uninitialized>;
@@ -1284,6 +1360,11 @@ def note_uninit_fixit_remove_cond : Note<
   "is always %select{false|true}2">;
 def err_init_incomplete_type : Error<"initialization of incomplete type %0">;
 
+def warn_unsequenced_mod_mod : Warning<
+  "multiple unsequenced modifications to %0">, InGroup<Unsequenced>;
+def warn_unsequenced_mod_use : Warning<
+  "unsequenced modification and access to %0">, InGroup<Unsequenced>;
+
 def err_temp_copy_no_viable : Error<
   "no viable constructor %select{copying variable|copying parameter|"
   "returning object|throwing object|copying member subobject|copying array "
@@ -1469,6 +1550,8 @@ def warn_cxx98_compat_constexpr : Warning<
 def err_invalid_constexpr : Error<
   "%select{function parameter|typedef|non-static data member}0 "
   "cannot be constexpr">;
+def err_invalid_constexpr_member : Error<"non-static data member cannot be "
+  "constexpr%select{; did you intend to make it %select{const|static}0?|}1">;
 def err_constexpr_tag : Error<
   "%select{class|struct|interface|union|enum}0 cannot be marked constexpr">;
 def err_constexpr_dtor : Error<"destructor cannot be marked constexpr">;
@@ -1509,7 +1592,7 @@ def err_constexpr_vla : Error<
   "%select{function|constructor}1">;
 def err_constexpr_var_declaration : Error<
   "variables cannot be declared in a constexpr %select{function|constructor}0">;
-def err_constexpr_function_never_constant_expr : ExtWarn<
+def ext_constexpr_function_never_constant_expr : ExtWarn<
   "constexpr %select{function|constructor}0 never produces a "
   "constant expression">, InGroup<DiagGroup<"invalid-constexpr">>, DefaultError;
 def err_constexpr_body_no_return : Error<
@@ -1584,8 +1667,19 @@ def err_attribute_argument_not_int : Error<
   "'%0' attribute requires integer constant">;
 def err_aligned_attribute_argument_not_int : Error<
   "'aligned' attribute requires integer constant">;
-def err_attribute_argument_not_class : Error<
-  "%0 attribute requires arguments that are class type or point to class type">;
+def err_alignas_attribute_wrong_decl_type : Error<
+  "'%select{alignas|_Alignas}0' attribute cannot be applied to a %select{"
+  "function parameter|variable with 'register' storage class|"
+  "'catch' variable|bit-field}1">;
+def err_alignas_missing_on_definition : Error<
+  "'%select{alignas|_Alignas}0' must be specified on definition if it is "
+  "specified on any declaration">;
+def note_alignas_on_declaration : Note<
+  "declared with '%select{alignas|_Alignas}0' attribute here">;
+def err_alignas_mismatch : Error<
+  "redeclaration has different alignment requirement (%1 vs %0)">;
+def err_alignas_underaligned : Error<
+  "requested alignment is less than minimum alignment of %1 for type %0">;
 def err_attribute_first_argument_not_int_or_bool : Error<
   "%0 attribute first argument must be of int or bool type">;
 def err_attribute_argument_outof_range : Error<
@@ -1594,6 +1688,8 @@ def err_attribute_argument_outof_range : Error<
 def err_init_priority_object_attr : Error<
   "can only use 'init_priority' attribute on file-scope definitions "
   "of objects of class type">;
+def err_attribute_argument_vec_type_hint : Error<
+  "invalid attribute argument %0 - expecting a vector or vectorizable scalar type">;
 def err_attribute_argument_n_not_int : Error<
   "'%0' attribute requires parameter %1 to be an integer constant">;
 def err_attribute_argument_n_not_string : Error<
@@ -1651,6 +1747,8 @@ def err_as_qualified_auto_decl : Error<
   "automatic variable qualified with an address space">;
 def err_arg_with_address_space : Error<
   "parameter may not be qualified with an address space">;
+def err_field_with_address_space : Error<
+  "field may not be qualified with an address space">;
 def err_attr_objc_ownership_redundant : Error<
   "the type %0 is already explicitly ownership-qualified">;
 def err_attribute_not_string : Error<
@@ -1725,12 +1823,14 @@ def warn_attribute_after_definition_ignored : Warning<
    InGroup<IgnoredAttributes>;
 def warn_unknown_attribute_ignored : Warning<
   "unknown attribute %0 ignored">, InGroup<UnknownAttributes>;
+def warn_cxx11_gnu_attribute_on_type : Warning<
+  "attribute %0 ignored, because it cannot be applied to a type">,
+  InGroup<IgnoredAttributes>;
 def warn_unhandled_ms_attribute_ignored : Warning<
   "__declspec attribute %0 is not supported">, 
   InGroup<IgnoredAttributes>;
-def warn_attribute_invalid_on_stmt : Warning<
-  "attribute %0 cannot be specified on a statement">,
-  InGroup<IgnoredAttributes>;
+def err_attribute_invalid_on_stmt : Error<
+  "%0 attribute cannot be applied to a statement">;
 def warn_declspec_attribute_ignored : Warning<
   "attribute %0 is ignored, place it after "
   "\"%select{class|struct|union|interface|enum}1\" to apply attribute to "
@@ -1773,17 +1873,22 @@ def err_alias_not_supported_on_darwin : Error <
 def warn_attribute_wrong_decl_type : Warning<
   "%0 attribute only applies to %select{functions|unions|"
   "variables and functions|functions and methods|parameters|"
-  "functions, methods and blocks|functions, methods, and parameters|"
-  "classes|variables|methods|variables, functions and labels|"
-  "fields and global variables|structs|"
-  "variables, functions and tag types|thread-local variables}1">,
+  "functions, methods and blocks|functions, methods, and classes|"
+  "functions, methods, and parameters|classes|variables|methods|"
+  "variables, functions and labels|fields and global variables|structs|"
+  "variables, functions and tag types|thread-local variables|"
+  "variables and fields|variables, data members and tag types|"
+  "types and namespaces}1">,
   InGroup<IgnoredAttributes>;
 def err_attribute_wrong_decl_type : Error<
   "%0 attribute only applies to %select{functions|unions|"
   "variables and functions|functions and methods|parameters|"
-  "functions, methods and blocks|functions, methods, and parameters|"
-  "classes|variables|methods|variables, functions and labels|"
-  "fields and global variables|structs|thread-local variables}1">;
+  "functions, methods and blocks|functions, methods, and classes|"
+  "functions, methods, and parameters|classes|variables|methods|"
+  "variables, functions and labels|fields and global variables|structs|"
+  "variables, functions and tag types|thread-local variables|"
+  "variables and fields|variables, data members and tag types|"
+  "types and namespaces}1">;
 def warn_function_attribute_wrong_type : Warning<
   "'%0' only applies to function types; type here is %1">,
   InGroup<IgnoredAttributes>;
@@ -1813,7 +1918,7 @@ def err_cconv_knr : Error<
   "function with no prototype cannot use %0 calling convention">;
 def err_cconv_varargs : Error<
   "variadic function cannot use %0 calling convention">;
-def err_regparm_mismatch : Error<"function declared with with regparm(%0) "
+def err_regparm_mismatch : Error<"function declared with regparm(%0) "
   "attribute was previously declared "
   "%plural{0:without the regparm|:with the regparm(%1)}1 attribute">;
 def err_returns_retained_mismatch : Error<
@@ -1824,11 +1929,13 @@ def err_objc_precise_lifetime_bad_type : Error<
 def warn_objc_precise_lifetime_meaningless : Error<
   "objc_precise_lifetime is not meaningful for "
   "%select{__unsafe_unretained|__autoreleasing}0 objects">;
-def err_invalid_pcs : Error<"Invalid PCS type">;
+def err_invalid_pcs : Error<"invalid PCS type">;
 def err_attribute_can_be_applied_only_to_value_decl : Error<
   "%0 attribute can only be applied to value declarations">;
-def warn_attribute_not_on_decl : Error<
-  "%0 attribute ignored when parsing type">;
+def warn_attribute_not_on_decl : Warning<
+  "%0 attribute ignored when parsing type">, InGroup<IgnoredAttributes>;
+def err_base_specifier_attribute : Error<
+  "%0 attribute cannot be applied to a base specifier">;
 
 // Availability attribute
 def warn_availability_unknown_platform : Warning<
@@ -1839,6 +1946,16 @@ def warn_availability_version_ordering : Warning<
   "attribute ignored">, InGroup<Availability>;
 def warn_mismatched_availability: Warning<
   "availability does not match previous declaration">, InGroup<Availability>;
+def warn_mismatched_availability_override : Warning<
+  "overriding method %select{introduced after|"
+  "deprecated before|obsoleted before}0 overridden method on %1 (%2 vs. %3)">, 
+  InGroup<Availability>;
+def warn_mismatched_availability_override_unavail : Warning<
+  "overriding method cannot be unavailable on %0 when its overridden method is "
+  "available">,
+  InGroup<Availability>;
+def note_overridden_method : Note<
+  "overridden method is here">;
 
 // Thread Safety Attributes
 def warn_thread_attribute_ignored : Warning<
@@ -1938,18 +2055,22 @@ def warn_fun_requires_lock_precise : Warning<
   InGroup<ThreadSafetyPrecise>, DefaultIgnore;
 def note_found_mutex_near_match : Note<"found near match '%0'">;
 
+// Dummy warning that will trigger "beta" warnings from the analysis if enabled. 
+def warn_thread_safety_beta : Warning<
+  "Thread safety beta warning.">, InGroup<ThreadSafetyBeta>, DefaultIgnore;
+
 def warn_impcast_vector_scalar : Warning<
   "implicit conversion turns vector to scalar: %0 to %1">,
-  InGroup<DiagGroup<"conversion">>, DefaultIgnore;
+  InGroup<Conversion>, DefaultIgnore;
 def warn_impcast_complex_scalar : Warning<
   "implicit conversion discards imaginary component: %0 to %1">,
-  InGroup<DiagGroup<"conversion">>, DefaultIgnore;
+  InGroup<Conversion>, DefaultIgnore;
 def warn_impcast_float_precision : Warning<
   "implicit conversion loses floating-point precision: %0 to %1">,
-  InGroup<DiagGroup<"conversion">>, DefaultIgnore;
+  InGroup<Conversion>, DefaultIgnore;
 def warn_impcast_float_integer : Warning<
   "implicit conversion turns floating-point number into integer: %0 to %1">,
-  InGroup<DiagGroup<"conversion">>, DefaultIgnore;
+  InGroup<Conversion>, DefaultIgnore;
 def warn_impcast_integer_sign : Warning<
   "implicit conversion changes signedness: %0 to %1">,
   InGroup<SignConversion>, DefaultIgnore;
@@ -1958,7 +2079,7 @@ def warn_impcast_integer_sign_conditional : Warning<
   InGroup<SignConversion>, DefaultIgnore;
 def warn_impcast_integer_precision : Warning<
   "implicit conversion loses integer precision: %0 to %1">,
-  InGroup<DiagGroup<"conversion">>, DefaultIgnore;
+  InGroup<Conversion>, DefaultIgnore;
 def warn_impcast_integer_64_32 : Warning<
   "implicit conversion loses integer precision: %0 to %1">,
   InGroup<Shorten64To32>, DefaultIgnore;
@@ -2036,6 +2157,8 @@ def warn_attribute_protected_visibility :
   Warning<"target does not support 'protected' visibility; using 'default'">,
   InGroup<DiagGroup<"unsupported-visibility">>;
 def err_mismatched_visibility: Error<"visibility does not match previous declaration">;
+def warn_attribute_unknown_endian : Warning<"unknown endian '%0'">,
+  InGroup<IgnoredAttributes>;
 def note_previous_attribute : Note<"previous attribute is here">;
 def err_unknown_machine_mode : Error<"unknown machine mode %0">;
 def err_unsupported_machine_mode : Error<"unsupported machine mode %0">;
@@ -2158,15 +2281,11 @@ def err_uninitialized_member_for_assign : Error<
   "non-static %select{reference|const}1 member %2 can't use default "
   "assignment operator">;
 def err_uninitialized_member_in_ctor : Error<
-  "%select{|implicit default }0constructor for %1 must explicitly initialize "
-  "the %select{reference|const}2 member %3">;
-def warn_default_arg_makes_ctor_special : Warning<
+  "%select{|implicit default |inheriting }0constructor for %1 must explicitly "
+  "initialize the %select{reference|const}2 member %3">;
+def err_default_arg_makes_ctor_special : Error<
   "addition of default argument on redeclaration makes this constructor a "
-  "%select{default|copy|move}0 constructor">, InGroup<DefaultArgSpecialMember>;
-def note_previous_declaration_special : Note<
-  // The ERRORs are in hopes that if they occur, they'll get reported.
-  "previous declaration was %select{*ERROR*|a copy constructor|a move "
-  "constructor|*ERROR*|*ERROR*|*ERROR*|not a special member function}0">;
+  "%select{default|copy|move}0 constructor">;
 
 def err_use_of_default_argument_to_function_declared_later : Error<
   "use of default argument to function %0 that is declared later in class %1">;
@@ -2246,6 +2365,11 @@ def note_ovl_candidate_substitution_failure : Note<
     "candidate template ignored: substitution failure%0%1">;
 def note_ovl_candidate_disabled_by_enable_if : Note<
     "candidate template ignored: disabled by %0%1">;
+def note_ovl_candidate_failed_overload_resolution : Note<
+    "candidate template ignored: couldn't resolve reference to overloaded "
+    "function %0">;
+def note_ovl_candidate_non_deduced_mismatch : Note<
+    "candidate template ignored: could not match %diff{$ against $|types}0,1">;
     
 // Note that we don't treat templates differently for this diagnostic.
 def note_ovl_candidate_arity : Note<"candidate "
@@ -2473,9 +2597,10 @@ def err_ovl_no_viable_oper : Error<"no viable overloaded '%0'">;
 def err_ovl_deleted_oper : Error<
   "overload resolution selected %select{unavailable|deleted}0 operator '%1'%2">;
 def err_ovl_deleted_special_oper : Error<
-  "overload resolution selected implicitly-deleted %select{default constructor|"
-  "copy constructor|move constructor|copy assignment operator|move assignment "
-  "operator|destructor|'%1'}0%2">;
+  "object of type %0 cannot be %select{constructed|copied|moved|assigned|"
+  "assigned|destroyed}1 because its %select{default constructor|"
+  "copy constructor|move constructor|copy assignment operator|"
+  "move assignment operator|destructor}1 is implicitly deleted">;
 def err_ovl_no_viable_subscript :
     Error<"no viable overloaded operator[] for type %0">;
 def err_ovl_no_oper :
@@ -2597,7 +2722,7 @@ def err_template_arg_must_be_type_suggest : Error<
 def err_template_arg_must_be_expr : Error<
   "template argument for non-type template parameter must be an expression">;
 def err_template_arg_nontype_ambig : Error<
-  "template argument for non-type template parameter is treated as type %0">;
+  "template argument for non-type template parameter is treated as function type %0">;
 def err_template_arg_must_be_template : Error<
   "template argument for template template parameter must be a class template%select{| or type alias template}0">;
 def ext_template_arg_local_type : ExtWarn<
@@ -3021,9 +3146,9 @@ def warn_cxx98_compat_template_outside_of_template : Warning<
   InGroup<CXX98Compat>, DefaultIgnore;
 
 def err_non_type_template_in_nested_name_specifier : Error<
-  "qualified name refers into a specialization of function template '%0'">;
+  "qualified name refers into a specialization of function template %0">;
 def err_template_id_not_a_type : Error<
-  "template name refers to non-type template '%0'">;
+  "template name refers to non-type template %0">;
 def note_template_declared_here : Note<
   "%select{function template|class template|type alias template|template template parameter}0 "
   "%1 declared here">;
@@ -3142,6 +3267,8 @@ def note_sentinel_here : Note<
 def warn_missing_prototype : Warning<
   "no previous prototype for function %0">,
   InGroup<DiagGroup<"missing-prototypes">>, DefaultIgnore;
+def note_declaration_not_a_prototype : Note<
+  "this declaration is not a prototype; add 'void' to make it a prototype for a zero-parameter function">; 
 def warn_missing_variable_declarations : Warning<
   "no previous extern declaration for non-static variable %0">,
   InGroup<DiagGroup<"missing-variable-declarations">>, DefaultIgnore;
@@ -3189,18 +3316,23 @@ def note_deleted_assign_field : Note<
   "%select{copy|move}0 assignment operator of %1 is implicitly deleted "
   "because field %2 is of %select{reference|const-qualified}4 type %3">;
 
-// This should eventually be an error.
+// These should be errors.
 def warn_undefined_internal : Warning<
   "%select{function|variable}0 %q1 has internal linkage but is not defined">,
-  DiagGroup<"undefined-internal">;
+  InGroup<DiagGroup<"undefined-internal">>;
+def warn_undefined_inline : Warning<"inline function %q0 is not defined">,
+  InGroup<DiagGroup<"undefined-inline">>;
 def note_used_here : Note<"used here">;
 
 def warn_internal_in_extern_inline : ExtWarn<
   "static %select{function|variable}0 %1 is used in an inline function with "
-  "external linkage">, InGroup<DiagGroup<"static-in-inline"> >;
+  "external linkage">, InGroup<StaticInInline>;
 def ext_internal_in_extern_inline : Extension<
   "static %select{function|variable}0 %1 is used in an inline function with "
-  "external linkage">, InGroup<DiagGroup<"static-in-inline"> >;
+  "external linkage">, InGroup<StaticInInline>;
+def warn_static_local_in_extern_inline : Warning<
+  "non-constant static local variable in inline function may be different "
+  "in different files">, InGroup<StaticLocalInInline>;
 def note_convert_inline_to_static : Note<
   "use 'static' to give inline function %0 internal linkage">;
 def note_internal_decl_declared_here : Note<
@@ -3216,6 +3348,8 @@ def err_inline_declaration_block_scope : Error<
   "inline declaration of %0 not allowed in block scope">;
 def err_static_non_static : Error<
   "static declaration of %0 follows non-static declaration">;
+def err_different_language_linkage : Error<
+  "declaration of %0 has a different language linkage">;
 def warn_weak_import : Warning <
   "an already-declared variable is made a weak_import declaration %0">;
 def warn_static_non_static : ExtWarn<
@@ -3304,7 +3438,7 @@ def err_array_too_large : Error<
   "array is too large (%0 elements)">;
 def warn_array_new_too_large : Warning<"array is too large (%0 elements)">,
   // FIXME PR11644: ", will throw std::bad_array_new_length at runtime"
-  InGroup<DiagGroup<"bad-array-new-length">>;
+  InGroup<BadArrayNewLength>;
 
 // -Wpadded, -Wpacked
 def warn_padded_struct_field : Warning<
@@ -3324,7 +3458,7 @@ def warn_unnecessary_packed : Warning<
 def err_typecheck_negative_array_size : Error<"array size is negative">;
 def warn_typecheck_negative_array_new_size : Warning<"array size is negative">,
   // FIXME PR11644: ", will throw std::bad_array_new_length at runtime"
-  InGroup<DiagGroup<"bad-array-new-length">>;
+  InGroup<BadArrayNewLength>;
 def warn_typecheck_function_qualifiers : Warning<
   "qualifier on function type %0 has unspecified behavior">;
 def err_typecheck_invalid_restrict_not_pointer : Error<
@@ -3339,7 +3473,7 @@ def err_typecheck_zero_array_size : Error<
   "zero-length arrays are not permitted in C++">;
 def warn_typecheck_zero_static_array_size : Warning<
   "'static' has no effect on zero-length arrays">,
-  InGroup<DiagGroup<"array-bounds">>;
+  InGroup<ArrayBounds>;
 def err_array_size_non_int : Error<"size of array has non-integer type %0">;
 def err_init_element_not_constant : Error<
   "initializer element is not a compile-time constant">;
@@ -3610,8 +3744,9 @@ def err_arc_mismatched_cast : Error<
   " to %3 is disallowed with ARC">;
 def err_arc_nolifetime_behavior : Error<
   "explicit ownership qualifier on cast result has no effect">;
-def err_arc_objc_object_in_struct : Error<
-  "ARC forbids %select{Objective-C objects|blocks}0 in structs or unions">;
+def err_arc_objc_object_in_tag : Error<
+  "ARC forbids %select{Objective-C objects|blocks}0 in "
+  "%select{struct|interface|union|<<ERROR>>|enum}1">;
 def err_arc_objc_property_default_assign_on_object : Error<
   "ARC forbids synthesizing a property of an Objective-C object "
   "with unspecified ownership or storage attribute">;
@@ -3653,6 +3788,11 @@ def warn_arc_retained_property_assign : Warning<
   "assigning retained object to unsafe property"
   "; object will be released after assignment">,
   InGroup<ARCUnsafeRetainedAssign>;
+def warn_arc_literal_assign : Warning<
+  "assigning %select{array literal|dictionary literal|numeric literal|boxed expression|<should not happen>|block literal}0"
+  " to a weak %select{property|variable}1"
+  "; object will be released after assignment">,
+  InGroup<ARCUnsafeRetainedAssign>;
 def err_arc_new_array_without_ownership : Error<
   "'new' cannot allocate an array of %0 with no explicit ownership">;
 def err_arc_autoreleasing_var : Error<
@@ -3691,6 +3831,10 @@ def err_arc_collection_forward : Error<
 def err_arc_multiple_method_decl : Error< 
   "multiple methods named %0 found with mismatched result, "
   "parameter type or attributes">;
+def warn_arc_lifetime_result_type : Warning<
+  "ARC %select{unused|__unsafe_unretained|__strong|__weak|__autoreleasing}0 "
+  "lifetime qualifier on return type is ignored">,
+  InGroup<IgnoredQualifiers>;
 
 let CategoryName = "ARC Retain Cycle" in {
 
@@ -3703,9 +3847,6 @@ def note_arc_retain_cycle_owner : Note<
 
 } // end "ARC Retain Cycle" category
 
-def note_nontrivial_objc_ownership : Note<
-  "because type %0 has %select{no|no|__strong|__weak|__autoreleasing}1 "
-  "ownership">;
 def warn_arc_object_memaccess : Warning<
   "%select{destination for|source of}0 this %1 call is a pointer to "
   "ownership-qualified type %2">, InGroup<ARCNonPodMemAccess>;
@@ -3743,12 +3884,20 @@ def err_arc_cast_requires_bridge : Error<
   "requires a bridged cast">;
 def note_arc_bridge : Note<
   "use __bridge to convert directly (no change in ownership)">;
+def note_arc_cstyle_bridge : Note<
+  "use __bridge with C-style cast to convert directly (no change in ownership)">;
 def note_arc_bridge_transfer : Note<
   "use %select{__bridge_transfer|CFBridgingRelease call}1 to transfer "
   "ownership of a +1 %0 into ARC">;
+def note_arc_cstyle_bridge_transfer : Note<
+  "use __bridge_transfer with C-style cast to transfer "
+  "ownership of a +1 %0 into ARC">;
 def note_arc_bridge_retained : Note<
   "use %select{__bridge_retained|CFBridgingRetain call}1 to make an "
   "ARC object available as a +1 %0">;
+def note_arc_cstyle_bridge_retained : Note<
+  "use __bridge_retained with C-style cast to make an "
+  "ARC object available as a +1 %0">;
 
 } // ARC Casting category
 
@@ -3796,16 +3945,17 @@ def err_atomic_specifier_bad_type : Error<
   "%1 %select{||||||which is not trivially copyable}0">;
 
 // Expressions.
-def ext_sizeof_function_type : Extension<
-  "invalid application of 'sizeof' to a function type">, InGroup<PointerArith>;
-def ext_sizeof_void_type : Extension<
-  "invalid application of '%select{sizeof|__alignof|vec_step}0' to a void "
+def ext_sizeof_alignof_function_type : Extension<
+  "invalid application of '%select{sizeof|alignof|vec_step}0' to a "
+  "function type">, InGroup<PointerArith>;
+def ext_sizeof_alignof_void_type : Extension<
+  "invalid application of '%select{sizeof|alignof|vec_step}0' to a void "
   "type">, InGroup<PointerArith>;
 def err_sizeof_alignof_incomplete_type : Error<
-  "invalid application of '%select{sizeof|__alignof|vec_step}0' to an "
+  "invalid application of '%select{sizeof|alignof|vec_step}0' to an "
   "incomplete type %1">;
 def err_sizeof_alignof_bitfield : Error<
-  "invalid application of '%select{sizeof|__alignof}0' to bit-field">;
+  "invalid application of '%select{sizeof|alignof}0' to bit-field">;
 def err_vecstep_non_scalar_vector_type : Error<
   "'vec_step' requires built-in scalar or vector type, %0 invalid">;
 def err_offsetof_incomplete_type : Error<
@@ -3888,6 +4038,10 @@ def warn_sizeof_array_param : Warning<
   "sizeof on array function parameter will return size of %0 instead of %1">,
   InGroup<SizeofArrayArgument>;
 
+def warn_sizeof_array_decay : Warning<
+  "sizeof on pointer operation will return size of %0 instead of %1">,
+  InGroup<SizeofArrayDecay>;
+
 def err_sizeof_nonfragile_interface : Error<
   "application of '%select{alignof|sizeof}1' to interface %0 is "
   "not supported on this architecture and platform">;
@@ -3912,6 +4066,8 @@ def err_subscript_function_type : Error<
   "subscript of pointer to function type %0">;
 def err_subscript_incomplete_type : Error<
   "subscript of pointer to incomplete type %0">;
+def err_dereference_incomplete_type : Error<
+  "dereference of pointer to incomplete type %0">;
 def ext_gnu_subscript_void_type : Extension<
   "subscript of a pointer to void is a GNU extension">, InGroup<PointerArith>;
 def err_typecheck_member_reference_struct_union : Error<
@@ -4038,7 +4194,13 @@ def err_typecheck_sclass_fscope : Error<
   "illegal storage class on file-scoped variable">;
 def err_unsupported_global_register : Error<
   "global register variables are not supported">;
-def warn_standalone_specifier : Warning<"'%0' ignored on this declaration">;
+def warn_standalone_specifier : Warning<"'%0' ignored on this declaration">,
+  InGroup<MissingDeclarations>;
+def ext_standalone_specifier : ExtWarn<"'%0' is not permitted on a declaration "
+  "of a type">, InGroup<MissingDeclarations>;
+def err_standalone_class_nested_name_specifier : Error<
+  "forward declaration of %select{class|struct|interface|union|enum}0 cannot "
+  "have a nested name specifier">;
 def err_typecheck_sclass_func : Error<"illegal storage class on function">;
 def err_static_block_func : Error<
   "function declared in block scope cannot have 'static' storage class">;
@@ -4052,12 +4214,14 @@ def err_invalid_form_pointer_member_function : Error<
   "cannot create a non-constant pointer to member function">;
 def err_parens_pointer_member_function : Error<
   "cannot parenthesize the name of a method when forming a member pointer">;
+def err_typecheck_invalid_lvalue_addrof_addrof_function : Error<
+  "extra '&' taking address of overloaded function">;
 def err_typecheck_invalid_lvalue_addrof : Error<
-  "address expression must be an lvalue or a function designator">;
-def ext_typecheck_addrof_class_temporary : ExtWarn<
+  "cannot take the address of an rvalue of type %0">;
+def ext_typecheck_addrof_temporary : ExtWarn<
   "taking the address of a temporary object of type %0">, 
   InGroup<DiagGroup<"address-of-temporary">>, DefaultError;
-def err_typecheck_addrof_class_temporary : Error<
+def err_typecheck_addrof_temporary : Error<
   "taking the address of a temporary object of type %0">;
 def err_typecheck_unary_expr : Error<
   "invalid argument type %0 to unary expression">;
@@ -4070,7 +4234,7 @@ def note_indirection_through_null : Note<
 def warn_pointer_indirection_from_incompatible_type : Warning<
   "dereference of type %1 that was reinterpret_cast from type %0 has undefined "
   "behavior">,
-  InGroup<DiagGroup<"undefined-reinterpret-cast">>, DefaultIgnore;
+  InGroup<UndefinedReinterpretCast>, DefaultIgnore;
 
 def err_objc_object_assignment : Error<
   "cannot assign to class object (%0 invalid)">;
@@ -4127,11 +4291,11 @@ def warn_comparison_of_mixed_enum_types : Warning<
   InGroup<DiagGroup<"enum-compare">>;
 def warn_null_in_arithmetic_operation : Warning<
   "use of NULL in arithmetic operation">,
-  InGroup<DiagGroup<"null-arithmetic">>;
+  InGroup<NullArithmetic>;
 def warn_null_in_comparison_operation : Warning<
   "comparison between NULL and non-pointer "
   "%select{(%1 and NULL)|(NULL and %1)}0">,
-  InGroup<DiagGroup<"null-arithmetic">>;
+  InGroup<NullArithmetic>;
 
 def err_invalid_this_use : Error<
   "invalid use of 'this' outside of a non-static member function">;
@@ -4178,6 +4342,9 @@ def err_unexpected_interface : Error<
 def err_ref_non_value : Error<"%0 does not refer to a value">;
 def err_ref_vm_type : Error<
   "cannot refer to declaration with a variably modified type inside block">;
+def err_ref_flexarray_type : Error<
+  "cannot refer to declaration of structure variable with flexible array member "
+  "inside block">;
 def err_ref_array_type : Error<
   "cannot refer to declaration with an array type inside block">;
 def err_property_not_found : Error<
@@ -4185,7 +4352,7 @@ def err_property_not_found : Error<
 def err_invalid_property_name : Error<
   "%0 is not a valid property name (accessing an object of type %1)">;
 def err_getter_not_found : Error<
-  "expected getter method not found on object of type %0">;
+  "no getter method for read from property">;
 def err_objc_subscript_method_not_found : Error<
   "expected method to %select{read|write}1 %select{dictionary|array}2 element not "
   "found on object of type %0">;
@@ -4276,8 +4443,6 @@ def error_no_super_class_message : Error<
   "no @interface declaration found in class messaging of %0">;
 def error_root_class_cannot_use_super : Error<
   "%0 cannot use 'super' because it is a root class">;
-def err_invalid_receiver_to_message : Error<
-  "invalid receiver to message expression">;
 def err_invalid_receiver_to_message_super : Error<
   "'super' is only valid in a method body">;
 def err_invalid_receiver_class_message : Error<
@@ -4337,6 +4502,14 @@ def note_parameter_here : Note<
 def err_bad_reinterpret_cast_overload : Error<
   "reinterpret_cast cannot resolve overloaded function %0 to type %1">;
 
+def warn_reinterpret_different_from_static : Warning<
+  "'reinterpret_cast' %select{from|to}3 class %0 %select{to|from}3 its "
+  "%select{virtual base|base at non-zero offset}2 %1 behaves differently from "
+  "'static_cast'">, InGroup<ReinterpretBaseClass>;
+def note_reinterpret_updowncast_use_static: Note<
+  "use 'static_cast' to adjust the pointer correctly while "
+  "%select{upcasting|downcasting}0">;
+
 def err_bad_static_cast_overload : Error<
   "address of overloaded function %0 cannot be static_cast to type %1">;
 
@@ -4386,7 +4559,7 @@ def err_bad_reinterpret_cast_reference : Error<
   "reinterpret_cast of a %0 to %1 needs its address which is not allowed">;
 def warn_undefined_reinterpret_cast : Warning<
   "reinterpret_cast from %0 to %1 has undefined behavior">,
-  InGroup<DiagGroup<"undefined-reinterpret-cast">>, DefaultIgnore;
+  InGroup<UndefinedReinterpretCast>, DefaultIgnore;
 
 // These messages don't adhere to the pattern.
 // FIXME: Display the path somehow better.
@@ -4464,7 +4637,7 @@ def ext_delete_void_ptr_operand : ExtWarn<
 def err_ambiguous_delete_operand : Error<"ambiguous conversion of delete "
                                          "expression of type %0 to a pointer">;
 def warn_delete_incomplete : Warning<
-  "deleting pointer to incomplete type %0 may cause undefined behaviour">,
+  "deleting pointer to incomplete type %0 may cause undefined behavior">,
   InGroup<DiagGroup<"delete-incomplete">>;
 def err_delete_incomplete_class_type : Error<
   "deleting incomplete class type %0; no conversions to pointer type">;
@@ -4563,6 +4736,9 @@ let CategoryName = "Lambda Issue" in {
   def err_lambda_capture_vm_type : Error<
     "variable %0 with variably modified type cannot be captured in "
     "a lambda expression">;
+  def err_lambda_capture_flexarray_type : Error<
+    "variable %0 with flexible array member cannot be captured in "
+    "a lambda expression">;
   def err_lambda_impcap : Error<
     "variable %0 cannot be implicitly captured in a lambda with no "
     "capture-default specified">;
@@ -4573,8 +4749,6 @@ let CategoryName = "Lambda Issue" in {
     "cannot deduce lambda return type from initializer list">;
   def err_lambda_capture_default_arg : Error<
     "lambda expression in default argument cannot capture any entity">;
-  def err_lambda_unexpanded_pack : Error<
-    "unexpanded function parameter pack capture is unsupported">;
   def err_lambda_incomplete_result : Error<
     "incomplete result type %0 in lambda expression">;
   def err_lambda_objc_object_result : Error<
@@ -4823,7 +4997,7 @@ def ext_typecheck_convert_discards_qualifiers : ExtWarn<
   "sending to parameter of different type}0,1"
   "|%diff{casting $ to type $|casting between types}0,1}2"
   " discards qualifiers">,
-  InGroup<IncompatiblePointerTypes>;
+  InGroup<IncompatiblePointerTypesDiscardsQualifiers>;
 def ext_nested_pointer_qualifier_mismatch : ExtWarn<
   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
   "|%diff{passing $ to parameter of type $|"
@@ -4837,7 +5011,7 @@ def ext_nested_pointer_qualifier_mismatch : ExtWarn<
   "sending to parameter of different type}0,1"
   "|%diff{casting $ to type $|casting between types}0,1}2"
   " discards qualifiers in nested pointer types">,
-  InGroup<IncompatiblePointerTypes>;
+  InGroup<IncompatiblePointerTypesDiscardsQualifiers>;
 def warn_incompatible_vectors : Warning<
   "incompatible vector types "
   "%select{%diff{assigning to $ from $|assigning to different types}0,1"
@@ -5015,7 +5189,7 @@ def err_ref_bad_target : Error<
 def warn_non_pod_vararg_with_format_string : Warning<
   "cannot pass %select{non-POD|non-trivial}0 object of type %1 to variadic "
   "%select{function|block|method|constructor}2; expected type from format "
-  "string was %3">, InGroup<DiagGroup<"non-pod-varargs">>, DefaultError;
+  "string was %3">, InGroup<NonPODVarargs>, DefaultError;
 // The arguments to this diagnostic should match the warning above.
 def err_cannot_pass_objc_interface_to_vararg_format : Error<
   "cannot pass object with interface type %1 by value to variadic "
@@ -5028,7 +5202,7 @@ def err_cannot_pass_objc_interface_to_vararg : Error<
 def warn_cannot_pass_non_pod_arg_to_vararg : Warning<
   "cannot pass object of %select{non-POD|non-trivial}0 type %1 through variadic"
   " %select{function|block|method|constructor}2; call will abort at runtime">,
-  InGroup<DiagGroup<"non-pod-varargs">>, DefaultError;
+  InGroup<NonPODVarargs>, DefaultError;
 def warn_cxx98_compat_pass_non_pod_arg_to_vararg : Warning<
   "passing object of trivial but non-POD type %0 through variadic"
   " %select{function|block|method|constructor}1 is incompatible with C++98">,
@@ -5141,10 +5315,14 @@ let CategoryName = "Inline Assembly Issue" in {
     "%diff{$ matching output with type $|}0,1">;
   def err_asm_unknown_register_name : Error<"unknown register name '%0' in asm">;
   def err_asm_empty : Error<"__asm used with no assembly instructions">;
+  def err_asm_invalid_input_size : Error<
+    "invalid input size for constraint '%0'">;
   def err_invalid_asm_cast_lvalue : Error<
     "invalid use of a cast in a inline asm context requiring an l-value: "
     "remove the cast or build with -fheinous-gnu-extensions">;
   def err_inline_ms_asm_parsing : Error<"%0">;
+  def err_msasm_unsupported_arch : Error<
+    "Unsupported architecture '%0' for MS-style inline assembly">;
 
   def warn_asm_label_on_auto_decl : Warning<
     "ignored asm label '%0' on automatic variable">;
@@ -5153,7 +5331,8 @@ let CategoryName = "Inline Assembly Issue" in {
     "accepted due to -fheinous-gnu-extensions, but clang may remove support "
     "for this in the future">;
   def warn_asm_mismatched_size_modifier : Warning<
-    "the size being stored is truncated, use a modifier to specify the size">,
+    "the value is truncated when put into register, "
+    "use a modifier to specify the size">,
     InGroup<ASMOperandWidths>;
 }
 
@@ -5205,9 +5384,11 @@ def err_in_class_initializer_bad_type : Error<
   "static data member of type %0 must be initialized out of line">;
 def ext_in_class_initializer_float_type : ExtWarn<
   "in-class initializer for static data member of type %0 is a GNU extension">,
-  InGroup<GNU>;
-def note_in_class_initializer_float_type_constexpr : Note<
-  "use 'constexpr' specifier to silence this warning">;
+  InGroup<GNUStaticFloatInit>;
+def ext_in_class_initializer_float_type_cxx11 : ExtWarn<
+  "in-class initializer for static data member of type %0 requires "
+  "'constexpr' specifier">, InGroup<StaticFloatInit>, DefaultError;
+def note_in_class_initializer_float_type_cxx11 : Note<"add 'constexpr'">;
 def err_in_class_initializer_literal_type : Error<
   "in-class initializer for static data member of type %0 requires "
   "'constexpr' specifier">;
@@ -5244,6 +5425,9 @@ def err_anonymous_record_with_type : Error<
 def ext_anonymous_record_with_type : Extension<
   "types declared in an anonymous %select{struct|union}0 are a Microsoft "
   "extension">, InGroup<Microsoft>;
+def ext_anonymous_record_with_anonymous_type : Extension<
+  "anonymous types declared in an anonymous %select{struct|union}0 "
+  "are an extension">, InGroup<DiagGroup<"nested-anon-types">>;
 def err_anonymous_record_with_function : Error<
   "functions cannot be declared in an anonymous %select{struct|union}0">;
 def err_anonymous_record_with_static : Error<
@@ -5403,6 +5587,9 @@ def warn_cxx98_compat_explicit_conversion_functions : Warning<
 def err_defaulted_special_member_params : Error<
   "an explicitly-defaulted %select{|copy |move }0constructor cannot "
   "have default arguments">;
+def err_defaulted_special_member_variadic : Error<
+  "an explicitly-defaulted %select{|copy |move }0constructor cannot "
+  "be variadic">;
 def err_defaulted_special_member_return_type : Error<
   "explicitly-defaulted %select{copy|move}0 assignment operator must "
   "return %1">;
@@ -5420,10 +5607,6 @@ def err_defaulted_special_member_copy_const_param : Error<
   "the parameter for this explicitly-defaulted copy "
   "%select{constructor|assignment operator}0 is const, but a member or base "
   "requires it to be non-const">;
-def err_defaulted_special_member_copy_non_const_param : Error<
-  "explicitly-defaulted copy %select{constructor|assignment operator}0 with "
-  "a non-const parameter must be defaulted outside the class, unless a base or "
-  "member requires the parameter to be non-const">;
 def err_defaulted_copy_assign_not_ref : Error<
   "the parameter for an explicitly-defaulted copy assignment operator must be an "
   "lvalue reference type">;
@@ -5446,17 +5629,17 @@ def ext_implicit_exception_spec_mismatch : ExtWarn<
 
 def warn_ptr_arith_precedes_bounds : Warning<
   "the pointer decremented by %0 refers before the beginning of the array">,
-  InGroup<DiagGroup<"array-bounds-pointer-arithmetic">>, DefaultIgnore;
+  InGroup<ArrayBoundsPointerArithmetic>, DefaultIgnore;
 def warn_ptr_arith_exceeds_bounds : Warning<
   "the pointer incremented by %0 refers past the end of the array (that "
   "contains %1 element%s2)">,
-  InGroup<DiagGroup<"array-bounds-pointer-arithmetic">>, DefaultIgnore;
+  InGroup<ArrayBoundsPointerArithmetic>, DefaultIgnore;
 def warn_array_index_precedes_bounds : Warning<
   "array index %0 is before the beginning of the array">,
-  InGroup<DiagGroup<"array-bounds">>;
+  InGroup<ArrayBounds>;
 def warn_array_index_exceeds_bounds : Warning<
   "array index %0 is past the end of the array (which contains %1 "
-  "element%s2)">, InGroup<DiagGroup<"array-bounds">>;
+  "element%s2)">, InGroup<ArrayBounds>;
 def note_array_index_out_of_bounds : Note<
   "array %0 declared here">;
 
@@ -5494,7 +5677,7 @@ def warn_format_mix_positional_nonpositional_args : Warning<
   InGroup<Format>;
 def warn_static_array_too_small : Warning<
   "array argument is too small; contains %0 elements, callee requires at least %1">,
-  InGroup<DiagGroup<"array-bounds">>;
+  InGroup<ArrayBounds>;
 def note_callee_static_array : Note<
   "callee declares array parameter as static here">;
 def warn_empty_format_string : Warning<
@@ -5543,19 +5726,19 @@ def warn_null_arg : Warning<
 // CHECK: returning address/reference of stack memory
 def warn_ret_stack_addr : Warning<
   "address of stack memory associated with local variable %0 returned">,
-  InGroup<DiagGroup<"return-stack-address">>;
+  InGroup<ReturnStackAddress>;
 def warn_ret_stack_ref : Warning<
   "reference to stack memory associated with local variable %0 returned">,
-  InGroup<DiagGroup<"return-stack-address">>;
+  InGroup<ReturnStackAddress>;
 def warn_ret_local_temp_addr : Warning<
   "returning address of local temporary object">,
-  InGroup<DiagGroup<"return-stack-address">>;
+  InGroup<ReturnStackAddress>;
 def warn_ret_local_temp_ref : Warning<
   "returning reference to local temporary object">,
-  InGroup<DiagGroup<"return-stack-address">>;
+  InGroup<ReturnStackAddress>;
 def warn_ret_addr_label : Warning<
   "returning address of label, which is local">,
-  InGroup<DiagGroup<"return-stack-address">>;
+  InGroup<ReturnStackAddress>;
 def err_ret_local_block : Error<
   "returning block that lives on the local stack">;
 def note_ref_var_local_bind : Note<
@@ -5565,13 +5748,13 @@ def note_ref_var_local_bind : Note<
 // a constructor parameter.
 def warn_bind_ref_member_to_parameter : Warning<
   "binding reference member %0 to stack allocated parameter %1">,
-  InGroup<DiagGroup<"dangling-field">>;
+  InGroup<DanglingField>;
 def warn_init_ptr_member_to_parameter_addr : Warning<
   "initializing pointer member %0 with the stack address of parameter %1">,
-  InGroup<DiagGroup<"dangling-field">>;
+  InGroup<DanglingField>;
 def warn_bind_ref_member_to_temporary : Warning<
   "binding reference member %0 to a temporary value">,
-  InGroup<DiagGroup<"dangling-field">>;
+  InGroup<DanglingField>;
 def note_ref_or_ptr_member_declared_here : Note<
   "%select{reference|pointer}0 member declared here">;
 
@@ -5657,7 +5840,7 @@ def warn_bool_switch_condition : Warning<
   "switch condition has boolean value">;
 def warn_case_value_overflow : Warning<
   "overflow converting case value to switch condition type (%0 to %1)">,
-  InGroup<DiagGroup<"switch">>;
+  InGroup<Switch>;
 def err_duplicate_case : Error<"duplicate case value '%0'">;
 def err_duplicate_case_differing_expr : Error<
   "duplicate case value: '%0' and '%1' both equal '%2'">;
@@ -5760,10 +5943,10 @@ def err_second_parameter_to_va_arg_abstract: Error<
   "second argument to 'va_arg' is of abstract type %0">;
 def warn_second_parameter_to_va_arg_not_pod : Warning<
   "second argument to 'va_arg' is of non-POD type %0">,
-  InGroup<DiagGroup<"non-pod-varargs">>, DefaultError;
+  InGroup<NonPODVarargs>, DefaultError;
 def warn_second_parameter_to_va_arg_ownership_qualified : Warning<
   "second argument to 'va_arg' is of ARC ownership-qualified type %0">,
-  InGroup<DiagGroup<"non-pod-varargs">>, DefaultError;
+  InGroup<NonPODVarargs>, DefaultError;
 def warn_second_parameter_to_va_arg_never_compatible : Warning<
   "second argument to 'va_arg' is of promotable type %0; this va_arg has "
   "undefined behavior because arguments will be promoted to %1">;
@@ -5785,12 +5968,24 @@ def err_return_init_list : Error<
   "must not return a value">;
 def warn_noreturn_function_has_return_expr : Warning<
   "function %0 declared 'noreturn' should not return">,
-  InGroup<DiagGroup<"invalid-noreturn">>;
+  InGroup<InvalidNoreturn>;
 def warn_falloff_noreturn_function : Warning<
   "function declared 'noreturn' should not return">,
-  InGroup<DiagGroup<"invalid-noreturn">>;
+  InGroup<InvalidNoreturn>;
 def err_noreturn_block_has_return_expr : Error<
   "block declared 'noreturn' should not return">;
+def err_noreturn_missing_on_first_decl : Error<
+  "function declared '[[noreturn]]' after its first declaration">;
+def note_noreturn_missing_first_decl : Note<
+  "declaration missing '[[noreturn]]' attribute is here">;
+def err_carries_dependency_missing_on_first_decl : Error<
+  "%select{function|parameter}0 declared '[[carries_dependency]]' "
+  "after its first declaration">;
+def note_carries_dependency_missing_first_decl : Note<
+  "declaration missing '[[carries_dependency]]' attribute is here">;
+def err_carries_dependency_param_not_function_decl : Error<
+  "'[[carries_dependency]]' attribute only allowed on parameter in a function "
+  "declaration or lambda">;
 def err_block_on_nonlocal : Error<
   "__block attribute not allowed, only allowed on local variables">;
 def err_block_on_vm : Error<
@@ -5870,6 +6065,8 @@ def err_c99_array_usage_cxx : Error<
   "feature, not permitted in C++">;
 def err_double_requires_fp64 : Error<
   "use of type 'double' requires cl_khr_fp64 extension to be enabled">;
+def err_int128_unsupported : Error<
+  "__int128 is not supported on this target">;
 def err_nsconsumed_attribute_mismatch : Error<
   "overriding method has mismatched ns_consumed attribute on its"
   " parameter">;
@@ -5986,8 +6183,44 @@ def err_invalid_astype_of_different_size : Error<
   "invalid reinterpretation: sizes of %0 and %1 must match">;
 def err_static_kernel : Error<
   "kernel functions cannot be declared static">;
+def err_opencl_ptrptr_kernel_arg : Error<
+  "kernel argument cannot be declared as a pointer to a pointer">;
 def err_static_function_scope : Error<
   "variables in function scope cannot be declared static">;
+def err_opencl_bitfields : Error<
+  "bitfields are not supported in OpenCL">;
+def err_opencl_vla : Error<
+  "variable length arrays are not supported in OpenCL">;
+def err_event_t_kernel_arg : Error<
+  "the event_t type cannot be used to declare a kernel function argument">;
+def err_event_t_global_var : Error<
+  "the event_t type cannot be used to declare a program scope variable">;
+def err_event_t_struct_field : Error<
+  "the event_t type cannot be used to declare a structure or union field">;
+def err_event_t_addr_space_qual : Error<
+  "the event_t type can only be used with __private address space qualifier">;
+def err_expected_kernel_void_return_type : Error<
+  "kernel must have void return type">;
+def err_sampler_argument_required : Error<
+  "sampler_t variable required - got %0">;
+def err_wrong_sampler_addressspace: Error<
+  "sampler type cannot be used with the __local and __global address space qualifiers">;
+
+// OpenMP support.
+def err_omp_expected_var_arg_suggest : Error<
+  "%0 is not a global variable, static local variable or static data member%select{|; did you mean %2?}1">;
+def err_omp_global_var_arg : Error<
+  "arguments of '#pragma omp %0' must have %select{global storage|static storage duration}1">;
+def err_omp_ref_type_arg : Error<
+  "arguments of '#pragma omp %0' cannot be of reference type %1">;
+def err_omp_var_scope : Error<
+  "'#pragma omp %0' must appear in the scope of the %1 variable declaration">;
+def err_omp_var_used : Error<
+  "'#pragma omp %0' must precede all references to variable %1">;
+def err_omp_var_thread_local : Error<
+  "variable %0 cannot be threadprivate because it is thread-local">;
+def err_omp_incomplete_type : Error<
+  "a threadprivate variable must not have incomplete type %0">;
 
 } // end of sema category
 
@@ -6000,15 +6233,19 @@ def warn_related_result_type_compatibility_class : Warning<
 def warn_related_result_type_compatibility_protocol : Warning<
   "protocol method is expected to return an instance of the implementing "
   "class, but is declared to return %0">;
-def note_related_result_type_overridden_family : Note<
-  "overridden method is part of the '%select{|alloc|copy|init|mutableCopy|"
-  "new|autorelease|dealloc|finalize|release|retain|retainCount|self}0' method "
-  "family">;
+def note_related_result_type_family : Note<
+  "%select{overridden|current}0 method is part of the '%select{|alloc|copy|init|"
+  "mutableCopy|new|autorelease|dealloc|finalize|release|retain|retainCount|"
+  "self}1' method family%select{| and is expected to return an instance of its "
+  "class type}0">;
 def note_related_result_type_overridden : Note<
   "overridden method returns an instance of its class type">;
 def note_related_result_type_inferred : Note<
   "%select{class|instance}0 method %1 is assumed to return an instance of "
   "its receiver type (%2)">;
+def note_related_result_type_explicit : Note<
+  "%select{overridden|current}0 method is explicitly declared 'instancetype'"
+  "%select{| and is expected to return an instance of its class type}0">;
 
 }
 
@@ -6023,7 +6260,7 @@ def err_module_private_local_class : Error<
   "local %select{struct|interface|union|class|enum}0 cannot be declared "
   "__module_private__">;
 def err_module_private_definition : Error<
-  "definition of %0 must be imported before it is required">;
+  "definition of %0 must be imported from module '%1' before it is required">;
 }
 
 let CategoryName = "Documentation Issue" in {
diff --git a/include/clang/Basic/DiagnosticSerializationKinds.td b/include/clang/Basic/DiagnosticSerializationKinds.td
index e9df09d..7137404 100644
--- a/include/clang/Basic/DiagnosticSerializationKinds.td
+++ b/include/clang/Basic/DiagnosticSerializationKinds.td
@@ -17,10 +17,8 @@ def err_fe_pch_malformed : Error<
     "malformed or corrupted PCH file: '%0'">, DefaultFatal;
 def err_fe_pch_malformed_block : Error<
     "malformed block record in PCH file: '%0'">, DefaultFatal;
-def err_fe_pch_error_at_end_block : Error<
-    "error at end of module block in PCH file: '%0'">, DefaultFatal;
 def err_fe_pch_file_modified : Error<
-    "file '%0' has been modified since the precompiled header was built">,
+    "file '%0' has been modified since the precompiled header '%1' was built">,
     DefaultFatal;
 def err_fe_pch_file_overridden : Error<
     "file '%0' from the precompiled header has been overridden">;
@@ -46,19 +44,16 @@ def warn_pch_different_branch : Error<
 def err_pch_with_compiler_errors : Error<
     "PCH file contains compiler errors">;
     
-    
+def warn_module_conflict : Warning<
+    "module '%0' conflicts with already-imported module '%1': %2">, 
+    InGroup<ModuleConflict>;
+
 def err_pch_macro_def_undef : Error<
     "macro '%0' was %select{defined|undef'd}1 in the precompiled header but "
     "%select{undef'd|defined}1 on the command line">;
 def err_pch_macro_def_conflict : Error<
     "definition of macro '%0' differs between the precompiled header ('%1') "
     "and the command line ('%2')">;
-def err_pch_include_opt_missing : Error<
-    "precompiled header depends on '%select{-include|-imacros}0 %1' option "
-    "that is missing from the command line">;
-def err_pch_include_opt_conflict : Error<
-    "precompiled header option '%select{-include|-imacros}0 %1' conflicts with "
-    "corresponding option '%select{-include|-imacros}0 %2' on command line">;
 def err_pch_undef : Error<
     "%select{command line contains|precompiled header was built with}0 "
     "'-undef' but %select{precompiled header was not built with it|"
diff --git a/include/clang/Basic/FileManager.h b/include/clang/Basic/FileManager.h
index b2f578d..6d9e53b 100644
--- a/include/clang/Basic/FileManager.h
+++ b/include/clang/Basic/FileManager.h
@@ -17,11 +17,12 @@
 
 #include "clang/Basic/FileSystemOptions.h"
 #include "clang/Basic/LLVM.h"
+#include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/OwningPtr.h"
 #include "llvm/Support/Allocator.h"
 // FIXME: Enhance libsystem to support inode and other fields in stat.
 #include <sys/types.h>
@@ -152,6 +153,12 @@ class FileManager : public RefCountedBase<FileManager> {
   /// \see SeenDirEntries
   llvm::StringMap<FileEntry*, llvm::BumpPtrAllocator> SeenFileEntries;
 
+  /// \brief The canonical names of directories.
+  llvm::DenseMap<const DirectoryEntry *, llvm::StringRef> CanonicalDirNames;
+
+  /// \brief Storage for canonical names that we have computed.
+  llvm::BumpPtrAllocator CanonicalNameStorage;
+
   /// \brief Each FileEntry we create is assigned a unique ID #.
   ///
   unsigned NextFileUID;
@@ -164,7 +171,7 @@ class FileManager : public RefCountedBase<FileManager> {
   OwningPtr<FileSystemStatCache> StatCache;
 
   bool getStatValue(const char *Path, struct stat &StatBuf,
-                    int *FileDescriptor);
+                    bool isFile, int *FileDescriptor);
 
   /// Add all ancestors of the given path (pointing to either a file
   /// or a directory) as virtual directories.
@@ -257,6 +264,13 @@ public:
   static void modifyFileEntry(FileEntry *File, off_t Size,
                               time_t ModificationTime);
 
+  /// \brief Retrieve the canonical name for a given directory.
+  ///
+  /// This is a very expensive operation, despite its results being cached,
+  /// and should only be used when the physical layout of the file system is
+  /// required, which is (almost) never.
+  StringRef getCanonicalName(const DirectoryEntry *Dir);
+
   void PrintStats() const;
 };
 
diff --git a/include/clang/Basic/FileSystemStatCache.h b/include/clang/Basic/FileSystemStatCache.h
index a802c7c..ff70373 100644
--- a/include/clang/Basic/FileSystemStatCache.h
+++ b/include/clang/Basic/FileSystemStatCache.h
@@ -18,8 +18,8 @@
 #include "clang/Basic/LLVM.h"
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/StringMap.h"
-#include <sys/types.h>
 #include <sys/stat.h>
+#include <sys/types.h>
 
 namespace clang {
 
@@ -44,13 +44,13 @@ public:
   ///
   /// \returns \c true if the path does not exist or \c false if it exists.
   ///
-  /// If FileDescriptor is non-null, then this lookup should only return success
-  /// for files (not directories).  If it is null this lookup should only return
+  /// If isFile is true, then this lookup should only return success for files
+  /// (not directories).  If it is false this lookup should only return
   /// success for directories (not files).  On a successful file lookup, the
   /// implementation can optionally fill in FileDescriptor with a valid
   /// descriptor and the client guarantees that it will close it.
-  static bool get(const char *Path, struct stat &StatBuf, int *FileDescriptor,
-                  FileSystemStatCache *Cache);
+  static bool get(const char *Path, struct stat &StatBuf,
+                  bool isFile, int *FileDescriptor, FileSystemStatCache *Cache);
   
   
   /// \brief Sets the next stat call cache in the chain of stat caches.
@@ -69,16 +69,17 @@ public:
   
 protected:
   virtual LookupResult getStat(const char *Path, struct stat &StatBuf,
-                               int *FileDescriptor) = 0;
+                               bool isFile, int *FileDescriptor) = 0;
 
   LookupResult statChained(const char *Path, struct stat &StatBuf,
-                           int *FileDescriptor) {
+                           bool isFile, int *FileDescriptor) {
     if (FileSystemStatCache *Next = getNextStatCache())
-      return Next->getStat(Path, StatBuf, FileDescriptor);
+      return Next->getStat(Path, StatBuf, isFile, FileDescriptor);
     
     // If we hit the end of the list of stat caches to try, just compute and
     // return it without a cache.
-    return get(Path, StatBuf, FileDescriptor, 0) ? CacheMissing : CacheExists;
+    return get(Path, StatBuf,
+               isFile, FileDescriptor, 0) ? CacheMissing : CacheExists;
   }
 };
 
@@ -97,7 +98,7 @@ public:
   iterator end() const { return StatCalls.end(); }
   
   virtual LookupResult getStat(const char *Path, struct stat &StatBuf,
-                               int *FileDescriptor);
+                               bool isFile, int *FileDescriptor);
 };
 
 } // end namespace clang
diff --git a/include/clang/Basic/IdentifierTable.h b/include/clang/Basic/IdentifierTable.h
index 76242ec..c04a893 100644
--- a/include/clang/Basic/IdentifierTable.h
+++ b/include/clang/Basic/IdentifierTable.h
@@ -16,9 +16,9 @@
 #ifndef LLVM_CLANG_BASIC_IDENTIFIERTABLE_H
 #define LLVM_CLANG_BASIC_IDENTIFIERTABLE_H
 
+#include "clang/Basic/LLVM.h"
 #include "clang/Basic/OperatorKinds.h"
 #include "clang/Basic/TokenKinds.h"
-#include "clang/Basic/LLVM.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/PointerLikeTypeTraits.h"
@@ -146,9 +146,6 @@ public:
   bool hadMacroDefinition() const {
     return HadMacro;
   }
-  void setHadMacroDefinition(bool Val) {
-    HadMacro = Val;
-  }
 
   /// getTokenID - If this is a source-language token (e.g. 'for'), this API
   /// can be used to cause the lexer to map identifiers to source-language
@@ -297,11 +294,11 @@ public:
   }
   
   /// \brief Determine whether this is the contextual keyword
-  /// '__experimental_modules_import'.
+  /// 'import'.
   bool isModulesImport() const { return IsModulesImport; }
   
   /// \brief Set whether this identifier is the contextual keyword 
-  /// '__experimental_modules_import'.
+  /// 'import'.
   void setModulesImport(bool I) {
     IsModulesImport = I;
     if (I)
diff --git a/include/clang/Basic/LLVM.h b/include/clang/Basic/LLVM.h
index 13c5b44..306c75e 100644
--- a/include/clang/Basic/LLVM.h
+++ b/include/clang/Basic/LLVM.h
@@ -16,19 +16,24 @@
 #ifndef CLANG_BASIC_LLVM_H
 #define CLANG_BASIC_LLVM_H
 
-// This should be the only #include, force #includes of all the others on
-// clients.
+// Do not proliferate #includes here, require clients to #include their
+// dependencies.
+// Casting.h has complex templates that cannot be easily forward declared.
 #include "llvm/Support/Casting.h"
+// None.h includes an enumerator that is desired & cannot be forward declared
+// without a definition of NoneType.
+#include "llvm/ADT/None.h"
 
 namespace llvm {
   // ADT's.
   class StringRef;
   class Twine;
   template<typename T> class ArrayRef;
-  template<class T> class OwningPtr;
+  template<typename T> class OwningPtr;
   template<unsigned InternalLen> class SmallString;
   template<typename T, unsigned N> class SmallVector;
   template<typename T> class SmallVectorImpl;
+  template<typename T> class Optional;
 
   template<typename T>
   struct SaveAndRestore;
@@ -53,6 +58,8 @@ namespace clang {
   using llvm::cast_or_null;
   
   // ADT's.
+  using llvm::None;
+  using llvm::Optional;
   using llvm::StringRef;
   using llvm::Twine;
   using llvm::ArrayRef;
diff --git a/include/clang/Basic/LangOptions.def b/include/clang/Basic/LangOptions.def
index dbc08c7..3de0107 100644
--- a/include/clang/Basic/LangOptions.def
+++ b/include/clang/Basic/LangOptions.def
@@ -45,9 +45,10 @@ LANGOPT(C99               , 1, 0, "C99")
 LANGOPT(C11               , 1, 0, "C11")
 LANGOPT(MicrosoftExt      , 1, 0, "Microsoft extensions")
 LANGOPT(MicrosoftMode     , 1, 0, "Microsoft compatibility mode")
+LANGOPT(AsmBlocks         , 1, 0, "Microsoft inline asm blocks")
 LANGOPT(Borland           , 1, 0, "Borland extensions")
 LANGOPT(CPlusPlus         , 1, 0, "C++")
-LANGOPT(CPlusPlus0x       , 1, 0, "C++0x")
+LANGOPT(CPlusPlus11       , 1, 0, "C++0x")
 LANGOPT(CPlusPlus1y       , 1, 0, "C++1y")
 LANGOPT(ObjC1             , 1, 0, "Objective-C 1")
 LANGOPT(ObjC2             , 1, 0, "Objective-C 2")
@@ -115,7 +116,9 @@ LANGOPT(ShortEnums        , 1, 0, "short enum types")
 
 LANGOPT(OpenCL            , 1, 0, "OpenCL")
 LANGOPT(OpenCLVersion     , 32, 0, "OpenCL version")
+LANGOPT(NativeHalfType    , 1, 0, "Native half type support")
 LANGOPT(CUDA              , 1, 0, "CUDA")
+LANGOPT(OpenMP            , 1, 0, "OpenMP support")
 
 LANGOPT(AssumeSaneOperatorNew , 1, 1, "implicit __attribute__((malloc)) for C++'s new operators")
 BENIGN_LANGOPT(ElideConstructors , 1, 1, "C++ copy constructor elision")
@@ -144,18 +147,21 @@ BENIGN_LANGOPT(DelayedTemplateParsing , 1, 0, "delayed template parsing")
 LANGOPT(BlocksRuntimeOptional , 1, 0, "optional blocks runtime")
 
 ENUM_LANGOPT(GC, GCMode, 2, NonGC, "Objective-C Garbage Collection mode")
-ENUM_LANGOPT(VisibilityMode, Visibility, 3, DefaultVisibility, 
-             "symbol visibility")
+ENUM_LANGOPT(ValueVisibilityMode, Visibility, 3, DefaultVisibility, 
+             "value symbol visibility")
+ENUM_LANGOPT(TypeVisibilityMode, Visibility, 3, DefaultVisibility, 
+             "type symbol visibility")
 ENUM_LANGOPT(StackProtector, StackProtectorMode, 2, SSPOff, 
              "stack protector mode")
 ENUM_LANGOPT(SignedOverflowBehavior, SignedOverflowBehaviorTy, 2, SOB_Undefined,
              "signed integer overflow handling")
-ENUM_LANGOPT(FPContractMode, FPContractModeKind, 2, FPC_On, "FP_CONTRACT mode")
 
 BENIGN_LANGOPT(InstantiationDepth, 32, 512, 
                "maximum template instantiation depth")
 BENIGN_LANGOPT(ConstexprCallDepth, 32, 512,
                "maximum constexpr call depth")
+BENIGN_LANGOPT(BracketDepth, 32, 256,
+               "maximum bracket nesting depth")
 BENIGN_LANGOPT(NumLargeByValueCopy, 32, 0, 
         "if non-zero, warn about parameter or return Warn if parameter/return value is larger in bytes than this setting. 0 is no check.")
 VALUE_LANGOPT(MSCVersion, 32, 0, 
@@ -163,17 +169,8 @@ VALUE_LANGOPT(MSCVersion, 32, 0,
 
 LANGOPT(ApplePragmaPack, 1, 0, "Apple gcc-compatible #pragma pack handling")
 
-BENIGN_LANGOPT(EmitMicrosoftInlineAsm , 1, 0, 
-               "Enable emission of MS-style inline assembly.")
-
-
 BENIGN_LANGOPT(RetainCommentsFromSystemHeaders, 1, 0, "retain documentation comments from system headers in the AST")
 
-/// Runtime sanitizers.
-#define SANITIZER(NAME, ID) \
-BENIGN_LANGOPT(Sanitize##ID, 1, 0, NAME " sanitizer")
-#include "clang/Basic/Sanitizers.def"
-
 #undef LANGOPT
 #undef VALUE_LANGOPT
 #undef BENIGN_LANGOPT
diff --git a/include/clang/Basic/LangOptions.h b/include/clang/Basic/LangOptions.h
index fbb014e..21ca7eb 100644
--- a/include/clang/Basic/LangOptions.h
+++ b/include/clang/Basic/LangOptions.h
@@ -15,14 +15,23 @@
 #ifndef LLVM_CLANG_LANGOPTIONS_H
 #define LLVM_CLANG_LANGOPTIONS_H
 
-#include <string>
+#include "clang/Basic/CommentOptions.h"
 #include "clang/Basic/LLVM.h"
 #include "clang/Basic/ObjCRuntime.h"
 #include "clang/Basic/Visibility.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include <string>
 
 namespace clang {
 
+struct SanitizerOptions {
+#define SANITIZER(NAME, ID) unsigned ID : 1;
+#include "clang/Basic/Sanitizers.def"
+
+  /// \brief Cached set of sanitizer options with all sanitizers disabled.
+  static const SanitizerOptions Disabled;
+};
+
 /// Bitfields of LangOptions, split out from LangOptions in order to ensure that
 /// this large collection of bitfields is a trivial class type.
 class LangOptionsBase {
@@ -32,6 +41,7 @@ public:
 #define ENUM_LANGOPT(Name, Type, Bits, Default, Description)
 #include "clang/Basic/LangOptions.def"
 
+  SanitizerOptions Sanitize;
 protected:
   // Define language options of enumeration type. These are private, and will
   // have accessors (below).
@@ -56,12 +66,6 @@ public:
     SOB_Trapping    // -ftrapv
   };
 
-  enum FPContractModeKind {
-    FPC_Off,        // Form fused FP ops only where result will not be affected.
-    FPC_On,         // Form fused FP ops according to FP_CONTRACT rules.
-    FPC_Fast        // Aggressively fuse FP ops (E.g. FMA).
-  };
-
 public:
   clang::ObjCRuntime ObjCRuntime;
 
@@ -75,6 +79,9 @@ public:
 
   /// \brief The name of the current module.
   std::string CurrentModule;
+
+  /// \brief Options for parsing comments.
+  CommentOptions CommentOpts;
   
   LangOptions();
 
diff --git a/include/clang/Basic/Linkage.h b/include/clang/Basic/Linkage.h
index 6bc1f5d..01b8db1 100644
--- a/include/clang/Basic/Linkage.h
+++ b/include/clang/Basic/Linkage.h
@@ -42,6 +42,14 @@ enum Linkage {
   ExternalLinkage
 };
 
+/// \brief Describes the different kinds of language linkage
+/// (C++ [dcl.link]) that an entity may have.
+enum LanguageLinkage {
+  CLanguageLinkage,
+  CXXLanguageLinkage,
+  NoLanguageLinkage
+};
+
 /// \brief A more specific kind of linkage than enum Linkage.
 ///
 /// This is relevant to CodeGen and AST file reading.
diff --git a/include/clang/Basic/MacroBuilder.h b/include/clang/Basic/MacroBuilder.h
index 6df3a38..9a9eaa2 100644
--- a/include/clang/Basic/MacroBuilder.h
+++ b/include/clang/Basic/MacroBuilder.h
@@ -15,6 +15,7 @@
 #ifndef LLVM_CLANG_BASIC_MACROBUILDER_H
 #define LLVM_CLANG_BASIC_MACROBUILDER_H
 
+#include "clang/Basic/LLVM.h"
 #include "llvm/ADT/Twine.h"
 #include "llvm/Support/raw_ostream.h"
 
diff --git a/include/clang/Basic/Module.h b/include/clang/Basic/Module.h
index b6b088c..d2a43f0 100644
--- a/include/clang/Basic/Module.h
+++ b/include/clang/Basic/Module.h
@@ -18,10 +18,10 @@
 #include "clang/Basic/SourceLocation.h"
 #include "llvm/ADT/PointerIntPair.h"
 #include "llvm/ADT/PointerUnion.h"
+#include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/SetVector.h"
 #include <string>
 #include <utility>
 #include <vector>
@@ -34,12 +34,12 @@ namespace clang {
   
 class DirectoryEntry;
 class FileEntry;
+class FileManager;
 class LangOptions;
 class TargetInfo;
   
 /// \brief Describes the name of a module.
-typedef llvm::SmallVector<std::pair<std::string, SourceLocation>, 2>
-  ModuleId;
+typedef SmallVector<std::pair<std::string, SourceLocation>, 2> ModuleId;
   
 /// \brief Describes a module or submodule.
 class Module {
@@ -68,23 +68,26 @@ private:
   /// \brief The AST file if this is a top-level module which has a
   /// corresponding serialized AST file, or null otherwise.
   const FileEntry *ASTFile;
-  
+
+  /// \brief The top-level headers associated with this module.
+  llvm::SmallSetVector<const FileEntry *, 2> TopHeaders;
+
+  /// \brief top-level header filenames that aren't resolved to FileEntries yet.
+  std::vector<std::string> TopHeaderNames;
+
 public:
   /// \brief The headers that are part of this module.
-  llvm::SmallVector<const FileEntry *, 2> Headers;
+  SmallVector<const FileEntry *, 2> Headers;
 
   /// \brief The headers that are explicitly excluded from this module.
-  llvm::SmallVector<const FileEntry *, 2> ExcludedHeaders;
-
-  /// \brief The top-level headers associated with this module.
-  llvm::SmallSetVector<const FileEntry *, 2> TopHeaders;
+  SmallVector<const FileEntry *, 2> ExcludedHeaders;
 
   /// \brief The set of language features required to use this module.
   ///
   /// If any of these features is not present, the \c IsAvailable bit
   /// will be false to indicate that this (sub)module is not
   /// available.
-  llvm::SmallVector<std::string, 2> Requires;
+  SmallVector<std::string, 2> Requires;
 
   /// \brief Whether this module is available in the current
   /// translation unit.
@@ -116,7 +119,14 @@ public:
   /// \brief Whether, when inferring submodules, the inferr submodules should
   /// export all modules they import (e.g., the equivalent of "export *").
   unsigned InferExportWildcard : 1;
-  
+
+  /// \brief Whether the set of configuration macros is exhaustive.
+  ///
+  /// When the set of configuration macros is exhaustive, meaning
+  /// that no identifier not in this list should affect how the module is
+  /// built.
+  unsigned ConfigMacrosExhaustive : 1;
+
   /// \brief Describes the visibility of the various names within a
   /// particular module.
   enum NameVisibilityKind {
@@ -137,7 +147,7 @@ public:
 
   /// \brief The set of modules imported by this module, and on which this
   /// module depends.
-  llvm::SmallVector<Module *, 2> Imports;
+  SmallVector<Module *, 2> Imports;
   
   /// \brief Describes an exported module.
   ///
@@ -146,7 +156,7 @@ public:
   typedef llvm::PointerIntPair<Module *, 1, bool> ExportDecl;
   
   /// \brief The set of export declarations.
-  llvm::SmallVector<ExportDecl, 2> Exports;
+  SmallVector<ExportDecl, 2> Exports;
   
   /// \brief Describes an exported module that has not yet been resolved
   /// (perhaps because the module it refers to has not yet been loaded).
@@ -164,8 +174,58 @@ public:
   };
   
   /// \brief The set of export declarations that have yet to be resolved.
-  llvm::SmallVector<UnresolvedExportDecl, 2> UnresolvedExports;
-  
+  SmallVector<UnresolvedExportDecl, 2> UnresolvedExports;
+
+  /// \brief A library or framework to link against when an entity from this
+  /// module is used.
+  struct LinkLibrary {
+    LinkLibrary() : IsFramework(false) { }
+    LinkLibrary(const std::string &Library, bool IsFramework)
+      : Library(Library), IsFramework(IsFramework) { }
+    
+    /// \brief The library to link against.
+    ///
+    /// This will typically be a library or framework name, but can also
+    /// be an absolute path to the library or framework.
+    std::string Library;
+
+    /// \brief Whether this is a framework rather than a library.
+    bool IsFramework;
+  };
+
+  /// \brief The set of libraries or frameworks to link against when
+  /// an entity from this module is used.
+  llvm::SmallVector<LinkLibrary, 2> LinkLibraries;
+
+  /// \brief The set of "configuration macros", which are macros that
+  /// (intentionally) change how this module is built.
+  std::vector<std::string> ConfigMacros;
+
+  /// \brief An unresolved conflict with another module.
+  struct UnresolvedConflict {
+    /// \brief The (unresolved) module id.
+    ModuleId Id;
+
+    /// \brief The message provided to the user when there is a conflict.
+    std::string Message;
+  };
+
+  /// \brief The list of conflicts for which the module-id has not yet been
+  /// resolved.
+  std::vector<UnresolvedConflict> UnresolvedConflicts;
+
+  /// \brief A conflict between two modules.
+  struct Conflict {
+    /// \brief The module that this module conflicts with.
+    Module *Other;
+
+    /// \brief The message provided to the user when there is a conflict.
+    std::string Message;
+  };
+
+  /// \brief The list of conflicts.
+  std::vector<Conflict> Conflicts;
+
   /// \brief Construct a top-level module.
   explicit Module(StringRef Name, SourceLocation DefinitionLoc,
                   bool IsFramework)
@@ -173,7 +233,8 @@ public:
       IsAvailable(true), IsFromModuleFile(false), IsFramework(IsFramework), 
       IsExplicit(false), IsSystem(false),
       InferSubmodules(false), InferExplicitSubmodules(false),
-      InferExportWildcard(false), NameVisibility(Hidden) { }
+      InferExportWildcard(false), ConfigMacrosExhaustive(false),
+      NameVisibility(Hidden) { }
   
   /// \brief Construct a new module or submodule.
   Module(StringRef Name, SourceLocation DefinitionLoc, Module *Parent, 
@@ -217,7 +278,13 @@ public:
     
     return false;
   }
-  
+
+  /// \brief Determine whether this module is a subframework of another
+  /// framework.
+  bool isSubFramework() const {
+    return IsFramework && Parent && Parent->isPartOfFramework();
+  }
+
   /// \brief Retrieve the full name of this module, including the path from
   /// its top-level module.
   std::string getFullModuleName() const;
@@ -266,6 +333,20 @@ public:
     return Umbrella && Umbrella.is<const DirectoryEntry *>();
   }
 
+  /// \brief Add a top-level header associated with this module.
+  void addTopHeader(const FileEntry *File) {
+    assert(File);
+    TopHeaders.insert(File);
+  }
+
+  /// \brief Add a top-level header filename associated with this module.
+  void addTopHeaderFilename(StringRef Filename) {
+    TopHeaderNames.push_back(Filename);
+  }
+
+  /// \brief The top-level headers associated with this module.
+  ArrayRef<const FileEntry *> getTopHeaders(FileManager &FileMgr);
+
   /// \brief Add the given feature requirement to the list of features
   /// required by this module.
   ///
@@ -284,7 +365,7 @@ public:
   ///
   /// \returns The submodule if found, or NULL otherwise.
   Module *findSubmodule(StringRef Name) const;
-  
+
   typedef std::vector<Module *>::iterator submodule_iterator;
   typedef std::vector<Module *>::const_iterator submodule_const_iterator;
   
@@ -292,14 +373,17 @@ public:
   submodule_const_iterator submodule_begin() const {return SubModules.begin();}
   submodule_iterator submodule_end()   { return SubModules.end(); }
   submodule_const_iterator submodule_end() const { return SubModules.end(); }
-  
+
+  /// \brief Returns the exported modules based on the wildcard restrictions.
+  void getExportedModules(SmallVectorImpl<Module *> &Exported) const;
+
   static StringRef getModuleInputBufferName() {
     return "<module-includes>";
   }
 
   /// \brief Print the module map for this module to the given stream. 
   ///
-  void print(llvm::raw_ostream &OS, unsigned Indent = 0) const;
+  void print(raw_ostream &OS, unsigned Indent = 0) const;
   
   /// \brief Dump the contents of this module to the given output stream.
   void dump() const;
diff --git a/include/clang/Basic/ObjCRuntime.h b/include/clang/Basic/ObjCRuntime.h
index d543b76..18ef64a 100644
--- a/include/clang/Basic/ObjCRuntime.h
+++ b/include/clang/Basic/ObjCRuntime.h
@@ -104,7 +104,7 @@ public:
     return true;
   }
 
-  /// \brief Is this runtime basically of the GNUstep family of runtimes?
+  /// \brief Is this runtime basically of the GNU family of runtimes?
   bool isGNUFamily() const {
     switch (getKind()) {
     case FragileMacOSX:
@@ -164,6 +164,8 @@ public:
         return getVersion() >= VersionTuple(10, 8);
       case iOS:
         return (getVersion() >= VersionTuple(6));
+      case GNUstep:
+        return getVersion() >= VersionTuple(1, 7);
     
       default:
       return false;
@@ -272,6 +274,18 @@ public:
     llvm_unreachable("bad kind");
   }
 
+  bool hasAtomicCopyHelper() const {
+    switch (getKind()) {
+    case FragileMacOSX:
+    case MacOSX:
+    case iOS:
+      return true;
+    case GNUstep:
+      return getVersion() >= VersionTuple(1, 7);
+    default: return false;
+    }
+  }
+
   /// \brief Try to parse an Objective-C runtime specification from the given
   /// string.
   ///
diff --git a/include/clang/Basic/OnDiskHashTable.h b/include/clang/Basic/OnDiskHashTable.h
index cc9ca9f..06cb143 100644
--- a/include/clang/Basic/OnDiskHashTable.h
+++ b/include/clang/Basic/OnDiskHashTable.h
@@ -14,11 +14,12 @@
 #ifndef LLVM_CLANG_BASIC_ON_DISK_HASH_TABLE_H
 #define LLVM_CLANG_BASIC_ON_DISK_HASH_TABLE_H
 
+#include "clang/Basic/LLVM.h"
 #include "llvm/Support/Allocator.h"
 #include "llvm/Support/DataTypes.h"
+#include "llvm/Support/Host.h"
 #include "llvm/Support/MathExtras.h"
 #include "llvm/Support/raw_ostream.h"
-#include "llvm/Support/Host.h"
 #include <cassert>
 #include <cstdlib>
 
diff --git a/include/clang/Basic/OpenMPKinds.def b/include/clang/Basic/OpenMPKinds.def
new file mode 100644
index 0000000..f968977
--- /dev/null
+++ b/include/clang/Basic/OpenMPKinds.def
@@ -0,0 +1,23 @@
+//===--- OpenMPKinds.def - OpenMP directives and clauses list ---*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+/// \file
+/// \brief This file defines the list of supported OpenMP directives and 
+/// clauses.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef OPENMP_DIRECTIVE
+#  define OPENMP_DIRECTIVE(Name)
+#endif
+
+// OpenMP directives.
+OPENMP_DIRECTIVE(threadprivate)
+OPENMP_DIRECTIVE(parallel)
+
+#undef OPENMP_DIRECTIVE
diff --git a/include/clang/Basic/OpenMPKinds.h b/include/clang/Basic/OpenMPKinds.h
new file mode 100644
index 0000000..c90e9a0
--- /dev/null
+++ b/include/clang/Basic/OpenMPKinds.h
@@ -0,0 +1,37 @@
+//===--- OpenMPKinds.h - OpenMP enums ---------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief Defines some OpenMP-specific enums and functions.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_BASIC_OPENMPKINDS_H
+#define LLVM_CLANG_BASIC_OPENMPKINDS_H
+
+#include "llvm/ADT/StringRef.h"
+
+namespace clang {
+
+/// \brief OpenMP directives.
+enum OpenMPDirectiveKind {
+  OMPD_unknown = 0,
+#define OPENMP_DIRECTIVE(Name) \
+  OMPD_##Name,
+#include "clang/Basic/OpenMPKinds.def"
+  NUM_OPENMP_DIRECTIVES
+};
+
+OpenMPDirectiveKind getOpenMPDirectiveKind(llvm::StringRef Str);
+const char *getOpenMPDirectiveName(OpenMPDirectiveKind Kind);
+
+}
+
+#endif
+
diff --git a/include/clang/Basic/OperatorPrecedence.h b/include/clang/Basic/OperatorPrecedence.h
new file mode 100644
index 0000000..b68d577
--- /dev/null
+++ b/include/clang/Basic/OperatorPrecedence.h
@@ -0,0 +1,52 @@
+//===--- OperatorPrecedence.h - Operator precedence levels ------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief Defines and computes precedence levels for binary/ternary operators.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_OPERATOR_PRECEDENCE_H
+#define LLVM_CLANG_OPERATOR_PRECEDENCE_H
+
+#include "clang/Basic/TokenKinds.h"
+
+namespace clang {
+
+/// PrecedenceLevels - These are precedences for the binary/ternary
+/// operators in the C99 grammar.  These have been named to relate
+/// with the C99 grammar productions.  Low precedences numbers bind
+/// more weakly than high numbers.
+namespace prec {
+  enum Level {
+    Unknown         = 0,    // Not binary operator.
+    Comma           = 1,    // ,
+    Assignment      = 2,    // =, *=, /=, %=, +=, -=, <<=, >>=, &=, ^=, |=
+    Conditional     = 3,    // ?
+    LogicalOr       = 4,    // ||
+    LogicalAnd      = 5,    // &&
+    InclusiveOr     = 6,    // |
+    ExclusiveOr     = 7,    // ^
+    And             = 8,    // &
+    Equality        = 9,    // ==, !=
+    Relational      = 10,   //  >=, <=, >, <
+    Shift           = 11,   // <<, >>
+    Additive        = 12,   // -, +
+    Multiplicative  = 13,   // *, /, %
+    PointerToMember = 14    // .*, ->*
+  };
+}
+
+/// \brief Return the precedence of the specified binary operator token.
+prec::Level getBinOpPrecedence(tok::TokenKind Kind, bool GreaterThanIsOperator,
+                               bool CPlusPlus11);
+
+}  // end namespace clang
+
+#endif  // LLVM_CLANG_OPERATOR_PRECEDENCE_H
diff --git a/include/clang/Basic/PartialDiagnostic.h b/include/clang/Basic/PartialDiagnostic.h
index 3f4626e..3f68160 100644
--- a/include/clang/Basic/PartialDiagnostic.h
+++ b/include/clang/Basic/PartialDiagnostic.h
@@ -19,6 +19,7 @@
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/SourceLocation.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/Support/Compiler.h"
 #include "llvm/Support/DataTypes.h"
 #include <cassert>
 
@@ -200,6 +201,14 @@ public:
     }
   }
 
+#if LLVM_HAS_RVALUE_REFERENCES
+  PartialDiagnostic(PartialDiagnostic &&Other)
+    : DiagID(Other.DiagID), DiagStorage(Other.DiagStorage),
+      Allocator(Other.Allocator) {
+    Other.DiagStorage = 0;
+  }
+#endif
+
   PartialDiagnostic(const PartialDiagnostic &Other, Storage *DiagStorage)
     : DiagID(Other.DiagID), DiagStorage(DiagStorage),
       Allocator(reinterpret_cast<StorageAllocator *>(~uintptr_t(0)))
@@ -242,6 +251,19 @@ public:
     return *this;
   }
 
+#if LLVM_HAS_RVALUE_REFERENCES
+  PartialDiagnostic &operator=(PartialDiagnostic &&Other) {
+    freeStorage();
+
+    DiagID = Other.DiagID;
+    DiagStorage = Other.DiagStorage;
+    Allocator = Other.Allocator;
+
+    Other.DiagStorage = 0;
+    return *this;
+  }
+#endif
+
   ~PartialDiagnostic() {
     freeStorage();
   }
@@ -299,7 +321,7 @@ public:
   }
 
   void EmitToString(DiagnosticsEngine &Diags,
-                    llvm::SmallVectorImpl<char> &Buf) const {
+                    SmallVectorImpl<char> &Buf) const {
     // FIXME: It should be possible to render a diagnostic to a string without
     //        messing with the state of the diagnostics engine.
     DiagnosticBuilder DB(Diags.Report(getDiagID()));
diff --git a/include/clang/Basic/Sanitizers.def b/include/clang/Basic/Sanitizers.def
index 085ca16..709ec8d 100644
--- a/include/clang/Basic/Sanitizers.def
+++ b/include/clang/Basic/Sanitizers.def
@@ -40,30 +40,61 @@
 
 // AddressSanitizer
 SANITIZER("address", Address)
+// More features of AddressSanitizer that should be turned on explicitly.
+SANITIZER("init-order", InitOrder)
+SANITIZER("use-after-return", UseAfterReturn)
+SANITIZER("use-after-scope", UseAfterScope)
+
+SANITIZER_GROUP("address-full", AddressFull,
+                Address | InitOrder | UseAfterReturn | UseAfterScope)
+
+// MemorySanitizer
+SANITIZER("memory", Memory)
 
 // ThreadSanitizer
 SANITIZER("thread", Thread)
 
 // UndefinedBehaviorSanitizer
-SANITIZER("signed-integer-overflow", SignedIntegerOverflow)
-SANITIZER("divide-by-zero", DivideByZero)
+SANITIZER("alignment", Alignment)
+SANITIZER("bool", Bool)
+SANITIZER("bounds", Bounds)
+SANITIZER("enum", Enum)
+SANITIZER("float-cast-overflow", FloatCastOverflow)
+SANITIZER("float-divide-by-zero", FloatDivideByZero)
+SANITIZER("integer-divide-by-zero", IntegerDivideByZero)
+SANITIZER("null", Null)
+SANITIZER("object-size", ObjectSize)
+SANITIZER("return", Return)
 SANITIZER("shift", Shift)
+SANITIZER("signed-integer-overflow", SignedIntegerOverflow)
 SANITIZER("unreachable", Unreachable)
-SANITIZER("return", Return)
 SANITIZER("vla-bound", VLABound)
-SANITIZER("alignment", Alignment)
-SANITIZER("null", Null)
 SANITIZER("vptr", Vptr)
-SANITIZER("object-size", ObjectSize)
-SANITIZER("float-cast-overflow", FloatCastOverflow)
 
-// -fsanitize=undefined (and its alias -fcatch-undefined-behavior). This should
-// include all the sanitizers which have low overhead, no ABI or address space
-// layout implications, and only catch undefined behavior.
+// IntegerSanitizer
+SANITIZER("unsigned-integer-overflow", UnsignedIntegerOverflow)
+
+// -fsanitize=undefined includes all the sanitizers which have low overhead, no
+// ABI or address space layout implications, and only catch undefined behavior.
 SANITIZER_GROUP("undefined", Undefined,
-                SignedIntegerOverflow | DivideByZero | Shift | Unreachable |
-                Return | VLABound | Alignment | Null | Vptr | ObjectSize |
-                FloatCastOverflow)
+                Alignment | Bool | Bounds | Enum | FloatCastOverflow |
+                FloatDivideByZero | IntegerDivideByZero | Null | ObjectSize |
+                Return | Shift | SignedIntegerOverflow | Unreachable |
+                VLABound | Vptr)
+
+// -fsanitize=undefined-trap (and its alias -fcatch-undefined-behavior) includes
+// all sanitizers included by -fsanitize=undefined, except those that require
+// runtime support.  This group is generally used in conjunction with the
+// -fsanitize-undefined-trap-on-error flag.
+SANITIZER_GROUP("undefined-trap", UndefinedTrap,
+                Alignment | Bool | Bounds | Enum | FloatCastOverflow |
+                FloatDivideByZero | IntegerDivideByZero | Null | ObjectSize |
+                Return | Shift | SignedIntegerOverflow | Unreachable |
+                VLABound)
+
+SANITIZER_GROUP("integer", Integer,
+                SignedIntegerOverflow | UnsignedIntegerOverflow | Shift |
+                IntegerDivideByZero)
 
 #undef SANITIZER
 #undef SANITIZER_GROUP
diff --git a/include/clang/Basic/SourceLocation.h b/include/clang/Basic/SourceLocation.h
index cfcf468..143beb6 100644
--- a/include/clang/Basic/SourceLocation.h
+++ b/include/clang/Basic/SourceLocation.h
@@ -16,12 +16,12 @@
 #define LLVM_CLANG_SOURCELOCATION_H
 
 #include "clang/Basic/LLVM.h"
-#include "llvm/Support/PointerLikeTypeTraits.h"
 #include "llvm/Support/Compiler.h"
-#include <utility>
-#include <functional>
+#include "llvm/Support/PointerLikeTypeTraits.h"
 #include <cassert>
+#include <functional>
 #include <string>
+#include <utility>
 
 namespace llvm {
   class MemoryBuffer;
@@ -165,7 +165,7 @@ public:
     return (void*)(uintptr_t)getRawEncoding();
   }
 
-  /// getFromPtrEncoding - Turn a pointer encoding of a SourceLocation object
+  /// \brief Turn a pointer encoding of a SourceLocation object back
   /// into a real SourceLocation.
   static SourceLocation getFromPtrEncoding(const void *Encoding) {
     return getFromRawEncoding((unsigned)(uintptr_t)Encoding);
@@ -218,7 +218,7 @@ public:
 /// \brief Represents a character-granular source range.
 ///
 /// The underlying SourceRange can either specify the starting/ending character
-/// of the range, or it can specify the start or the range and the start of the
+/// of the range, or it can specify the start of the range and the start of the
 /// last token of the range (a "token range").  In the token range case, the
 /// size of the last token must be measured to determine the actual end of the
 /// range.
@@ -227,20 +227,14 @@ class CharSourceRange {
   bool IsTokenRange;
 public:
   CharSourceRange() : IsTokenRange(false) {}
-  CharSourceRange(SourceRange R, bool ITR) : Range(R),IsTokenRange(ITR){}
+  CharSourceRange(SourceRange R, bool ITR) : Range(R), IsTokenRange(ITR) {}
 
   static CharSourceRange getTokenRange(SourceRange R) {
-    CharSourceRange Result;
-    Result.Range = R;
-    Result.IsTokenRange = true;
-    return Result;
+    return CharSourceRange(R, true);
   }
 
   static CharSourceRange getCharRange(SourceRange R) {
-    CharSourceRange Result;
-    Result.Range = R;
-    Result.IsTokenRange = false;
-    return Result;
+    return CharSourceRange(R, false);
   }
     
   static CharSourceRange getTokenRange(SourceLocation B, SourceLocation E) {
diff --git a/include/clang/Basic/SourceManager.h b/include/clang/Basic/SourceManager.h
index db6bfd2..00c96c3 100644
--- a/include/clang/Basic/SourceManager.h
+++ b/include/clang/Basic/SourceManager.h
@@ -10,7 +10,7 @@
 /// \file
 /// \brief Defines the SourceManager interface.
 ///
-/// There are three different types of locations in a file: a spelling
+/// There are three different types of locations in a %file: a spelling
 /// location, an expansion location, and a presumed location.
 ///
 /// Given an example of:
@@ -35,21 +35,22 @@
 #ifndef LLVM_CLANG_SOURCEMANAGER_H
 #define LLVM_CLANG_SOURCEMANAGER_H
 
-#include "clang/Basic/LLVM.h"
 #include "clang/Basic/FileManager.h"
+#include "clang/Basic/LLVM.h"
 #include "clang/Basic/SourceLocation.h"
-#include "llvm/Support/Allocator.h"
-#include "llvm/Support/DataTypes.h"
-#include "llvm/ADT/PointerIntPair.h"
-#include "llvm/ADT/PointerUnion.h"
-#include "llvm/ADT/IntrusiveRefCntPtr.h"
-#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/DenseSet.h"
+#include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/PointerIntPair.h"
+#include "llvm/ADT/PointerUnion.h"
+#include "llvm/Support/Allocator.h"
+#include "llvm/Support/DataTypes.h"
 #include "llvm/Support/MemoryBuffer.h"
+#include <cassert>
 #include <map>
 #include <vector>
-#include <cassert>
 
 namespace clang {
 
@@ -78,7 +79,7 @@ namespace SrcMgr {
   };
 
   /// \brief One instance of this struct is kept for every file loaded or used.
-  ////
+  ///
   /// This object owns the MemoryBuffer object.
   class ContentCache {
     enum CCFlags {
@@ -270,7 +271,7 @@ namespace SrcMgr {
       return SourceLocation::getFromRawEncoding(IncludeLoc);
     }
     const ContentCache* getContentCache() const {
-      return reinterpret_cast<const ContentCache*>(Data & ~7UL);
+      return reinterpret_cast<const ContentCache*>(Data & ~uintptr_t(7));
     }
 
     /// \brief Return whether this is a system header or not.
@@ -328,6 +329,11 @@ namespace SrcMgr {
         SourceLocation::getFromRawEncoding(ExpansionLocEnd).isInvalid();
     }
 
+    bool isMacroBodyExpansion() const {
+      return getExpansionLocStart().isValid() &&
+        SourceLocation::getFromRawEncoding(ExpansionLocEnd).isValid();
+    }
+
     bool isFunctionMacroExpansion() const {
       return getExpansionLocStart().isValid() &&
           getExpansionLocStart() != getExpansionLocEnd();
@@ -429,6 +435,11 @@ public:
   /// \returns true if an error occurred that prevented the source-location
   /// entry from being loaded.
   virtual bool ReadSLocEntry(int ID) = 0;
+
+  /// \brief Retrieve the module import location and name for the given ID, if
+  /// in fact it was loaded from a module (rather than, say, a precompiled
+  /// header).
+  virtual std::pair<SourceLocation, StringRef> getModuleImportLoc(int ID) = 0;
 };
 
 
@@ -436,7 +447,7 @@ public:
 ///
 /// The cache structure is complex enough to be worth breaking out of
 /// SourceManager.
-class IsBeforeInTranslationUnitCache {
+class InBeforeInTUCacheEntry {
   /// \brief The FileID's of the cached query.
   ///
   /// If these match up with a subsequent query, the result can be reused.
@@ -458,7 +469,6 @@ class IsBeforeInTranslationUnitCache {
   /// random token in the parent.
   unsigned LCommonOffset, RCommonOffset;
 public:
-
   /// \brief Return true if the currently cached values match up with
   /// the specified LHS/RHS query.
   ///
@@ -508,6 +518,11 @@ public:
 
 };
 
+/// \brief The stack used when building modules on demand, which is used
+/// to provide a link between the source managers of the different compiler
+/// instances.
+typedef ArrayRef<std::pair<std::string, FullSourceLoc> > ModuleBuildStack;
+
 /// \brief This class handles loading and caching of source files into memory.
 ///
 /// This object owns the MemoryBuffer objects for all of the loaded
@@ -572,13 +587,13 @@ class SourceManager : public RefCountedBase<SourceManager> {
   ///
   /// Positive FileIDs are indexes into this table. Entry 0 indicates an invalid
   /// expansion.
-  std::vector<SrcMgr::SLocEntry> LocalSLocEntryTable;
+  SmallVector<SrcMgr::SLocEntry, 0> LocalSLocEntryTable;
 
   /// \brief The table of SLocEntries that are loaded from other modules.
   ///
   /// Negative FileIDs are indexes into this table. To get from ID to an index,
   /// use (-ID - 2).
-  mutable std::vector<SrcMgr::SLocEntry> LoadedSLocEntryTable;
+  mutable SmallVector<SrcMgr::SLocEntry, 0> LoadedSLocEntryTable;
 
   /// \brief The starting offset of the next local SLocEntry.
   ///
@@ -631,8 +646,21 @@ class SourceManager : public RefCountedBase<SourceManager> {
   // Statistics for -print-stats.
   mutable unsigned NumLinearScans, NumBinaryProbes;
 
-  // Cache results for the isBeforeInTranslationUnit method.
-  mutable IsBeforeInTranslationUnitCache IsBeforeInTUCache;
+  /// The key value into the IsBeforeInTUCache table.
+  typedef std::pair<FileID, FileID> IsBeforeInTUCacheKey;
+
+  /// The IsBeforeInTranslationUnitCache is a mapping from FileID pairs
+  /// to cache results.
+  typedef llvm::DenseMap<IsBeforeInTUCacheKey, InBeforeInTUCacheEntry>
+          InBeforeInTUCache;
+
+  /// Cache results for the isBeforeInTranslationUnit method.
+  mutable InBeforeInTUCache IBTUCache;
+  mutable InBeforeInTUCacheEntry IBTUCacheOverflow;
+
+  /// Return the cache entry for comparing the given file IDs
+  /// for isBeforeInTranslationUnit.
+  InBeforeInTUCacheEntry &getInBeforeInTUCache(FileID LFID, FileID RFID) const;
 
   // Cache for the "fake" buffer used for error-recovery purposes.
   mutable llvm::MemoryBuffer *FakeBufferForRecovery;
@@ -645,6 +673,15 @@ class SourceManager : public RefCountedBase<SourceManager> {
 
   mutable llvm::DenseMap<FileID, MacroArgsMap *> MacroArgsCacheMap;
 
+  /// \brief The stack of modules being built, which is used to detect
+  /// cycles in the module dependency graph as modules are being built, as
+  /// well as to describe why we're rebuilding a particular module.
+  ///
+  /// There is no way to set this value from the command line. If we ever need
+  /// to do so (e.g., if on-demand module construction moves out-of-process),
+  /// we can add a cc1-level option to do so.
+  SmallVector<std::pair<std::string, FullSourceLoc>, 2> StoredModuleBuildStack;
+
   // SourceManager doesn't support copy construction.
   explicit SourceManager(const SourceManager&) LLVM_DELETED_FUNCTION;
   void operator=(const SourceManager&) LLVM_DELETED_FUNCTION;
@@ -669,6 +706,22 @@ public:
   /// (likely to change while trying to use them).
   bool userFilesAreVolatile() const { return UserFilesAreVolatile; }
 
+  /// \brief Retrieve the module build stack.
+  ModuleBuildStack getModuleBuildStack() const {
+    return StoredModuleBuildStack;
+  }
+
+  /// \brief Set the module build stack.
+  void setModuleBuildStack(ModuleBuildStack stack) {
+    StoredModuleBuildStack.clear();
+    StoredModuleBuildStack.append(stack.begin(), stack.end());
+  }
+
+  /// \brief Push an entry to the module build stack.
+  void pushModuleBuildStack(StringRef moduleName, FullSourceLoc importLoc) {
+    StoredModuleBuildStack.push_back(std::make_pair(moduleName.str(),importLoc));
+  }
+
   /// \brief Create the FileID for a memory buffer that will represent the
   /// FileID for the main source.
   ///
@@ -959,6 +1012,21 @@ public:
     return Entry.getFile().getIncludeLoc();
   }
 
+  // \brief Returns the import location if the given source location is
+  // located within a module, or an invalid location if the source location
+  // is within the current translation unit.
+  std::pair<SourceLocation, StringRef>
+  getModuleImportLoc(SourceLocation Loc) const {
+    FileID FID = getFileID(Loc);
+
+    // Positive file IDs are in the current translation unit, and -1 is a
+    // placeholder.
+    if (FID.ID >= -1)
+      return std::make_pair(SourceLocation(), "");
+
+    return ExternalSLocEntries->getModuleImportLoc(FID.ID);
+  }
+
   /// \brief Given a SourceLocation object \p Loc, return the expansion
   /// location referenced by the ID.
   SourceLocation getExpansionLoc(SourceLocation Loc) const {
@@ -1075,6 +1143,13 @@ public:
   /// expanded.
   bool isMacroArgExpansion(SourceLocation Loc) const;
 
+  /// \brief Tests whether the given source location represents the expansion of
+  /// a macro body.
+  ///
+  /// This is equivalent to testing whether the location is part of a macro
+  /// expansion but not the expansion of an argument to a function-like macro.
+  bool isMacroBodyExpansion(SourceLocation Loc) const;
+
   /// \brief Returns true if \p Loc is inside the [\p Start, +\p Length)
   /// chunk of the source location address space.
   ///
@@ -1187,7 +1262,8 @@ public:
   /// presumed location cannot be calculate (e.g., because \p Loc is invalid
   /// or the file containing \p Loc has changed on disk), returns an invalid
   /// presumed location.
-  PresumedLoc getPresumedLoc(SourceLocation Loc) const;
+  PresumedLoc getPresumedLoc(SourceLocation Loc,
+                             bool UseLineDirectives = true) const;
 
   /// \brief Returns true if both SourceLocations correspond to the same file.
   bool isFromSameFile(SourceLocation Loc1, SourceLocation Loc2) const {
@@ -1421,40 +1497,13 @@ public:
     return !isLoadedFileID(FID);
   }
 
-  /// Get a presumed location suitable for displaying in a diagnostic message,
-  /// taking into account macro arguments and expansions.
-  PresumedLoc getPresumedLocForDisplay(SourceLocation Loc) const {
-    // This is a condensed form of the algorithm used by emitCaretDiagnostic to
-    // walk to the top of the macro call stack.
-    while (Loc.isMacroID()) {
-      Loc = skipToMacroArgExpansion(Loc);
-      Loc = getImmediateMacroCallerLoc(Loc);
-    }
-
-    return getPresumedLoc(Loc);
-  }
-
-  /// Look through spelling locations for a macro argument expansion, and if
-  /// found skip to it so that we can trace the argument rather than the macros
-  /// in which that argument is used. If no macro argument expansion is found,
-  /// don't skip anything and return the starting location.
-  SourceLocation skipToMacroArgExpansion(SourceLocation StartLoc) const {
-    for (SourceLocation L = StartLoc; L.isMacroID();
-         L = getImmediateSpellingLoc(L)) {
-      if (isMacroArgExpansion(L))
-        return L;
-    }
-    // Otherwise just return initial location, there's nothing to skip.
-    return StartLoc;
-  }
-
   /// Gets the location of the immediate macro caller, one level up the stack
   /// toward the initial macro typed into the source.
   SourceLocation getImmediateMacroCallerLoc(SourceLocation Loc) const {
     if (!Loc.isMacroID()) return Loc;
 
     // When we have the location of (part of) an expanded parameter, its
-    // spelling location points to the argument as typed into the macro call,
+    // spelling location points to the argument as expanded in the macro call,
     // and therefore is used to locate the macro caller.
     if (isMacroArgExpansion(Loc))
       return getImmediateSpellingLoc(Loc);
@@ -1464,22 +1513,6 @@ public:
     return getImmediateExpansionRange(Loc).first;
   }
 
-  /// Gets the location of the immediate macro callee, one level down the stack
-  /// toward the leaf macro.
-  SourceLocation getImmediateMacroCalleeLoc(SourceLocation Loc) const {
-    if (!Loc.isMacroID()) return Loc;
-
-    // When we have the location of (part of) an expanded parameter, its
-    // expansion location points to the unexpanded parameter reference within
-    // the macro definition (or callee).
-    if (isMacroArgExpansion(Loc))
-      return getImmediateExpansionRange(Loc).first;
-
-    // Otherwise, the callee of the macro is located where this location was
-    // spelled inside the macro definition.
-    return getImmediateSpellingLoc(Loc);
-  }
-
 private:
   const llvm::MemoryBuffer *getFakeBufferForRecovery() const;
   const SrcMgr::ContentCache *getFakeContentCacheForRecovery() const;
@@ -1599,4 +1632,5 @@ public:
 
 }  // end namespace clang
 
+
 #endif
diff --git a/include/clang/Basic/Specifiers.h b/include/clang/Basic/Specifiers.h
index c82b8cb..8706179 100644
--- a/include/clang/Basic/Specifiers.h
+++ b/include/clang/Basic/Specifiers.h
@@ -62,13 +62,21 @@ namespace clang {
     TST_auto,         // C++0x auto
     TST_unknown_anytype, // __unknown_anytype extension
     TST_atomic,       // C11 _Atomic
+    TST_image1d_t,        // OpenCL image1d_t
+    TST_image1d_array_t,  // OpenCL image1d_array_t
+    TST_image1d_buffer_t, // OpenCL image1d_buffer_t
+    TST_image2d_t,        // OpenCL image2d_t
+    TST_image2d_array_t,  // OpenCL image2d_array_t
+    TST_image3d_t,        // OpenCL image3d_t
+    TST_sampler_t,        // OpenCL sampler_t
+    TST_event_t,          // OpenCL event_t
     TST_error         // erroneous type
   };
   
   /// \brief Structure that packs information about the type specifiers that
   /// were written in a particular type specifier sequence.
   struct WrittenBuiltinSpecs {
-    /*DeclSpec::TST*/ unsigned Type  : 5;
+    /*DeclSpec::TST*/ unsigned Type  : 6;
     /*DeclSpec::TSS*/ unsigned Sign  : 2;
     /*DeclSpec::TSW*/ unsigned Width : 2;
     bool ModeAttr : 1;
@@ -186,7 +194,8 @@ namespace clang {
     CC_X86Pascal,   // __attribute__((pascal))
     CC_AAPCS,       // __attribute__((pcs("aapcs")))
     CC_AAPCS_VFP,   // __attribute__((pcs("aapcs-vfp")))
-    CC_PnaclCall    // __attribute__((pnaclcall))
+    CC_PnaclCall,   // __attribute__((pnaclcall))
+    CC_IntelOclBicc // __attribute__((intel_ocl_bicc))
   };
 
 } // end namespace clang
diff --git a/include/clang/Basic/TargetCXXABI.h b/include/clang/Basic/TargetCXXABI.h
new file mode 100644
index 0000000..c9d28f8
--- /dev/null
+++ b/include/clang/Basic/TargetCXXABI.h
@@ -0,0 +1,261 @@
+//===--- TargetCXXABI.h - C++ ABI Target Configuration ----------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief Defines the TargetCXXABI class, which abstracts details of the
+/// C++ ABI that we're targeting.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_TARGETCXXABI_H
+#define LLVM_CLANG_TARGETCXXABI_H
+
+#include "llvm/ADT/Triple.h"
+#include "llvm/Support/ErrorHandling.h"
+
+namespace clang {
+
+/// \brief The basic abstraction for the target C++ ABI.
+class TargetCXXABI {
+public:
+  /// \brief The basic C++ ABI kind.
+  enum Kind {
+    /// The generic Itanium ABI is the standard ABI of most open-source
+    /// and Unix-like platforms.  It is the primary ABI targeted by
+    /// many compilers, including Clang and GCC.
+    ///
+    /// It is documented here:
+    ///   http://www.codesourcery.com/public/cxx-abi/
+    GenericItanium,
+
+    /// The generic ARM ABI is a modified version of the Itanium ABI
+    /// proposed by ARM for use on ARM-based platforms.
+    ///
+    /// These changes include:
+    ///   - the representation of member function pointers is adjusted
+    ///     to not conflict with the 'thumb' bit of ARM function pointers;
+    ///   - constructors and destructors return 'this';
+    ///   - guard variables are smaller;
+    ///   - inline functions are never key functions;
+    ///   - array cookies have a slightly different layout;
+    ///   - additional convenience functions are specified;
+    ///   - and more!
+    ///
+    /// It is documented here:
+    ///    http://infocenter.arm.com
+    ///                    /help/topic/com.arm.doc.ihi0041c/IHI0041C_cppabi.pdf
+    GenericARM,
+
+    /// The iOS ABI is a partial implementation of the ARM ABI.
+    /// Several of the features of the ARM ABI were not fully implemented
+    /// in the compilers that iOS was launched with.
+    ///
+    /// Essentially, the iOS ABI includes the ARM changes to:
+    ///   - member function pointers,
+    ///   - guard variables,
+    ///   - array cookies, and
+    ///   - constructor/destructor signatures.
+    iOS,
+
+    /// The generic AArch64 ABI is also a modified version of the Itanium ABI,
+    /// but it has fewer divergences than the 32-bit ARM ABI.
+    ///
+    /// The relevant changes from the generic ABI in this case are:
+    ///   - representation of member function pointers adjusted as in ARM.
+    ///   - guard variables  are smaller.
+    GenericAArch64,
+
+    /// The Microsoft ABI is the ABI used by Microsoft Visual Studio (and
+    /// compatible compilers).
+    ///
+    /// FIXME: should this be split into Win32 and Win64 variants?
+    ///
+    /// Only scattered and incomplete official documentation exists.
+    Microsoft
+  };
+
+private:
+  // Right now, this class is passed around as a cheap value type.
+  // If you add more members, especially non-POD members, please
+  // audit the users to pass it by reference instead.
+  Kind TheKind;
+
+public:
+  /// A bogus initialization of the platform ABI.
+  TargetCXXABI() : TheKind(GenericItanium) {}
+
+  TargetCXXABI(Kind kind) : TheKind(kind) {}
+
+  void set(Kind kind) {
+    TheKind = kind;
+  }
+
+  Kind getKind() const { return TheKind; }
+
+  /// \brief Does this ABI generally fall into the Itanium family of ABIs?
+  bool isItaniumFamily() const {
+    switch (getKind()) {
+    case GenericAArch64:
+    case GenericItanium:
+    case GenericARM:
+    case iOS:
+      return true;
+
+    case Microsoft:
+      return false;
+    }
+    llvm_unreachable("bad ABI kind");
+  }
+
+  /// \brief Is this ABI an MSVC-compatible ABI?
+  bool isMicrosoft() const {
+    switch (getKind()) {
+    case GenericAArch64:
+    case GenericItanium:
+    case GenericARM:
+    case iOS:
+      return false;
+
+    case Microsoft:
+      return true;
+    }
+    llvm_unreachable("bad ABI kind");
+  }
+
+  /// \brief Is the default C++ member function calling convention
+  /// the same as the default calling convention?
+  bool isMemberFunctionCCDefault() const {
+    // Right now, this is always true for Microsoft.
+    return !isMicrosoft();
+  }
+
+  /// \brief Does this ABI have different entrypoints for complete-object
+  /// and base-subobject constructors?
+  bool hasConstructorVariants() const {
+    return isItaniumFamily();
+  }
+
+  /// \brief Does this ABI have different entrypoints for complete-object
+  /// and base-subobject destructors?
+  bool hasDestructorVariants() const {
+    return isItaniumFamily();
+  }
+
+  /// \brief Does this ABI allow virtual bases to be primary base classes?
+  bool hasPrimaryVBases() const {
+    return isItaniumFamily();
+  }
+
+  /// \brief Can an out-of-line inline function serve as a key function?
+  ///
+  /// This flag is only useful in ABIs where type data (for example,
+  /// v-tables and type_info objects) are emitted only after processing
+  /// the definition of a special "key" virtual function.  (This is safe
+  /// because the ODR requires that every virtual function be defined
+  /// somewhere in a program.)  This usually permits such data to be
+  /// emitted in only a single object file, as opposed to redundantly
+  /// in every object file that requires it.
+  ///
+  /// One simple and common definition of "key function" is the first
+  /// virtual function in the class definition which is not defined there.
+  /// This rule works very well when that function has a non-inline
+  /// definition in some non-header file.  Unfortunately, when that
+  /// function is defined inline, this rule requires the type data
+  /// to be emitted weakly, as if there were no key function.
+  ///
+  /// The ARM ABI observes that the ODR provides an additional guarantee:
+  /// a virtual function is always ODR-used, so if it is defined inline,
+  /// that definition must appear in every translation unit that defines
+  /// the class.  Therefore, there is no reason to allow such functions
+  /// to serve as key functions.
+  ///
+  /// Because this changes the rules for emitting type data,
+  /// it can cause type data to be emitted with both weak and strong
+  /// linkage, which is not allowed on all platforms.  Therefore,
+  /// exploiting this observation requires an ABI break and cannot be
+  /// done on a generic Itanium platform.
+  bool canKeyFunctionBeInline() const {
+    switch (getKind()) {
+    case GenericARM:
+      return false;
+
+    case GenericAArch64:
+    case GenericItanium:
+    case iOS:   // old iOS compilers did not follow this rule
+    case Microsoft:
+      return true;
+    }
+    llvm_unreachable("bad ABI kind");
+  }
+
+  /// When is record layout allowed to allocate objects in the tail
+  /// padding of a base class?
+  ///
+  /// This decision cannot be changed without breaking platform ABI
+  /// compatibility, and yet it is tied to language guarantees which
+  /// the committee has so far seen fit to strengthen no less than
+  /// three separate times:
+  ///   - originally, there were no restrictions at all;
+  ///   - C++98 declared that objects could not be allocated in the
+  ///     tail padding of a POD type;
+  ///   - C++03 extended the definition of POD to include classes
+  ///     containing member pointers; and
+  ///   - C++11 greatly broadened the definition of POD to include
+  ///     all trivial standard-layout classes.
+  /// Each of these changes technically took several existing
+  /// platforms and made them permanently non-conformant.
+  enum TailPaddingUseRules {
+    /// The tail-padding of a base class is always theoretically
+    /// available, even if it's POD.  This is not strictly conforming
+    /// in any language mode.
+    AlwaysUseTailPadding,
+
+    /// Only allocate objects in the tail padding of a base class if
+    /// the base class is not POD according to the rules of C++ TR1.
+    /// This is non strictly conforming in C++11 mode.
+    UseTailPaddingUnlessPOD03,
+
+    /// Only allocate objects in the tail padding of a base class if
+    /// the base class is not POD according to the rules of C++11.
+    UseTailPaddingUnlessPOD11
+  };
+  TailPaddingUseRules getTailPaddingUseRules() const {
+    switch (getKind()) {
+    // To preserve binary compatibility, the generic Itanium ABI has
+    // permanently locked the definition of POD to the rules of C++ TR1,
+    // and that trickles down to all the derived ABIs.
+    case GenericItanium:
+    case GenericAArch64:
+    case GenericARM:
+    case iOS:
+      return UseTailPaddingUnlessPOD03;
+
+    // MSVC always allocates fields in the tail-padding of a base class
+    // subobject, even if they're POD.
+    case Microsoft:
+      return AlwaysUseTailPadding;
+    }
+    llvm_unreachable("bad ABI kind");
+  }
+
+  /// Try to parse an ABI name, returning false on error.
+  bool tryParse(llvm::StringRef name);
+
+  friend bool operator==(const TargetCXXABI &left, const TargetCXXABI &right) {
+    return left.getKind() == right.getKind();
+  }
+
+  friend bool operator!=(const TargetCXXABI &left, const TargetCXXABI &right) {
+    return !(left == right);
+  }
+};
+
+}  // end namespace clang
+
+#endif
diff --git a/include/clang/Basic/TargetInfo.h b/include/clang/Basic/TargetInfo.h
index 2d26783..c05f062 100644
--- a/include/clang/Basic/TargetInfo.h
+++ b/include/clang/Basic/TargetInfo.h
@@ -15,20 +15,21 @@
 #ifndef LLVM_CLANG_BASIC_TARGETINFO_H
 #define LLVM_CLANG_BASIC_TARGETINFO_H
 
+#include "clang/Basic/AddressSpaces.h"
+#include "clang/Basic/TargetCXXABI.h"
 #include "clang/Basic/LLVM.h"
+#include "clang/Basic/Specifiers.h"
+#include "clang/Basic/TargetOptions.h"
+#include "clang/Basic/VersionTuple.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/ADT/Triple.h"
 #include "llvm/Support/DataTypes.h"
-#include "clang/Basic/AddressSpaces.h"
-#include "clang/Basic/TargetOptions.h"
-#include "clang/Basic/VersionTuple.h"
-#include "clang/Basic/Specifiers.h"
 #include <cassert>
-#include <vector>
 #include <string>
+#include <vector>
 
 namespace llvm {
 struct fltSemantics;
@@ -43,26 +44,10 @@ class SourceManager;
 
 namespace Builtin { struct Info; }
 
-/// \brief The types of C++ ABIs for which we can generate code.
-enum TargetCXXABI {
-  /// The generic ("Itanium") C++ ABI, documented at:
-  ///   http://www.codesourcery.com/public/cxx-abi/
-  CXXABI_Itanium,
-
-  /// The ARM C++ ABI, based largely on the Itanium ABI but with
-  /// significant differences.
-  ///    http://infocenter.arm.com
-  ///                    /help/topic/com.arm.doc.ihi0041c/IHI0041C_cppabi.pdf
-  CXXABI_ARM,
-
-  /// The Visual Studio ABI.  Only scattered official documentation exists.
-  CXXABI_Microsoft
-};
-
 /// \brief Exposes information about the current target.
 ///
 class TargetInfo : public RefCountedBase<TargetInfo> {
-  llvm::IntrusiveRefCntPtr<TargetOptions> TargetOpts;
+  IntrusiveRefCntPtr<TargetOptions> TargetOpts;
   llvm::Triple Triple;
 protected:
   // Target values set by the ctor of the actual target implementation.  Default
@@ -89,7 +74,7 @@ protected:
   const llvm::fltSemantics *HalfFormat, *FloatFormat, *DoubleFormat,
     *LongDoubleFormat;
   unsigned char RegParmMax, SSERegParmMax;
-  TargetCXXABI CXXABI;
+  TargetCXXABI TheCXXABI;
   const LangAS::Map *AddrSpaceMap;
 
   mutable StringRef PlatformName;
@@ -109,7 +94,7 @@ public:
   /// modify the options to canonicalize the target feature information to match
   /// what the backend expects.
   static TargetInfo* CreateTargetInfo(DiagnosticsEngine &Diags,
-                                      TargetOptions &Opts);
+                                      TargetOptions *Opts);
 
   virtual ~TargetInfo();
 
@@ -119,8 +104,8 @@ public:
     return *TargetOpts; 
   }
 
-  void setTargetOpts(TargetOptions &TargetOpts) {
-    this->TargetOpts = &TargetOpts;
+  void setTargetOpts(TargetOptions *TargetOpts) {
+    this->TargetOpts = TargetOpts;
   }
 
   ///===---- Target Data Type Query Methods -------------------------------===//
@@ -151,6 +136,10 @@ public:
     /// typedef void* __builtin_va_list;
     VoidPtrBuiltinVaList,
 
+    /// __builtin_va_list as defind by the AArch64 ABI
+    /// http://infocenter.arm.com/help/topic/com.arm.doc.ihi0055a/IHI0055A_aapcs64.pdf
+    AArch64ABIBuiltinVaList,
+
     /// __builtin_va_list as defined by the PNaCl ABI:
     /// http://www.chromium.org/nativeclient/pnacl/bitcode-abi#TOC-Machine-Types
     PNaClABIBuiltinVaList,
@@ -270,6 +259,9 @@ public:
   unsigned getLongLongWidth() const { return LongLongWidth; }
   unsigned getLongLongAlign() const { return LongLongAlign; }
 
+  /// \brief Determine whether the __int128 type is supported on this target.
+  bool hasInt128Type() const { return getPointerWidth(0) >= 64; } // FIXME
+
   /// \brief Return the alignment that is suitable for storing any
   /// object with a fundamental alignment requirement.
   unsigned getSuitableAlign() const { return SuitableAlign; }
@@ -335,6 +327,9 @@ public:
     return getTypeWidth(IntMaxType);
   }
 
+  // Return the size of unwind_word for this target.
+  unsigned getUnwindWordWidth() const { return getPointerWidth(0); }
+
   /// \brief Return the "preferred" register width on this target.
   uint64_t getRegisterWidth() const {
     // Currently we assume the register width on the target matches the pointer
@@ -518,6 +513,10 @@ public:
   bool validateInputConstraint(ConstraintInfo *OutputConstraints,
                                unsigned NumOutputs,
                                ConstraintInfo &info) const;
+  virtual bool validateInputSize(StringRef /*Constraint*/,
+                                 unsigned /*Size*/) const {
+    return true;
+  }
   virtual bool validateConstraintModifier(StringRef /*Constraint*/,
                                           const char /*Modifier*/,
                                           unsigned /*Size*/) const {
@@ -572,8 +571,6 @@ public:
   /// either; the entire thing is pretty badly mangled.
   virtual bool hasProtectedVisibility() const { return true; }
 
-  virtual bool useGlobalsForAutomaticVariables() const { return false; }
-
   /// \brief Return the section to use for CFString literals, or 0 if no
   /// special section is used.
   virtual const char *getCFStringSection() const {
@@ -624,8 +621,8 @@ public:
   }
 
   /// \brief Get the C++ ABI currently in use.
-  virtual TargetCXXABI getCXXABI() const {
-    return CXXABI;
+  TargetCXXABI getCXXABI() const {
+    return TheCXXABI;
   }
 
   /// \brief Target the specified CPU.
@@ -645,14 +642,9 @@ public:
   /// \brief Use this specified C++ ABI.
   ///
   /// \return False on error (invalid C++ ABI name).
-  bool setCXXABI(const std::string &Name) {
-    static const TargetCXXABI Unknown = static_cast<TargetCXXABI>(-1);
-    TargetCXXABI ABI = llvm::StringSwitch<TargetCXXABI>(Name)
-      .Case("arm", CXXABI_ARM)
-      .Case("itanium", CXXABI_Itanium)
-      .Case("microsoft", CXXABI_Microsoft)
-      .Default(Unknown);
-    if (ABI == Unknown) return false;
+  bool setCXXABI(llvm::StringRef name) {
+    TargetCXXABI ABI;
+    if (!ABI.tryParse(name)) return false;
     return setCXXABI(ABI);
   }
 
@@ -660,7 +652,7 @@ public:
   ///
   /// \return False on error (ABI not valid on this target)
   virtual bool setCXXABI(TargetCXXABI ABI) {
-    CXXABI = ABI;
+    TheCXXABI = ABI;
     return true;
   }
 
@@ -735,13 +727,19 @@ public:
 
   bool isBigEndian() const { return BigEndian; }
 
+  enum CallingConvMethodType {
+    CCMT_Unknown,
+    CCMT_Member,
+    CCMT_NonMember
+  };
+
   /// \brief Gets the default calling convention for the given target and
   /// declaration context.
-  virtual CallingConv getDefaultCallingConv() const {
+  virtual CallingConv getDefaultCallingConv(CallingConvMethodType MT) const {
     // Not all targets will specify an explicit calling convention that we can
     // express.  This will always do the right thing, even though it's not
     // an explicit calling convention.
-    return CC_Default;
+    return CC_C;
   }
 
   enum CallingConvCheckResult {
diff --git a/include/clang/Basic/TargetOptions.h b/include/clang/Basic/TargetOptions.h
index d6deb02..c2183fd 100644
--- a/include/clang/Basic/TargetOptions.h
+++ b/include/clang/Basic/TargetOptions.h
@@ -15,6 +15,7 @@
 #ifndef LLVM_CLANG_FRONTEND_TARGETOPTIONS_H
 #define LLVM_CLANG_FRONTEND_TARGETOPTIONS_H
 
+#include "clang/Basic/LLVM.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
 #include <string>
 #include <vector>
diff --git a/include/clang/Basic/TokenKinds.def b/include/clang/Basic/TokenKinds.def
index 25e8d5a..a254fae 100644
--- a/include/clang/Basic/TokenKinds.def
+++ b/include/clang/Basic/TokenKinds.def
@@ -121,7 +121,7 @@ TOK(numeric_constant)    // 0x123
 TOK(char_constant)       // 'a'
 TOK(wide_char_constant)  // L'b'
 
-// C++0x Character Constants
+// C++11 Character Constants
 TOK(utf16_char_constant) // u'a'
 TOK(utf32_char_constant) // U'a'
 
@@ -130,7 +130,7 @@ TOK(string_literal)      // "foo"
 TOK(wide_string_literal) // L"foo"
 TOK(angle_string_literal)// <foo>
 
-// C++0x String Literals.
+// C++11 String Literals.
 TOK(utf8_string_literal) // u8"foo"
 TOK(utf16_string_literal)// u"foo"
 TOK(utf32_string_literal)// U"foo"
@@ -208,7 +208,7 @@ PUNCTUATOR(greatergreatergreater, ">>>")
 //   KEYCXX   - This is a C++ keyword, or a C++-specific keyword in the
 //              implementation namespace
 //   KEYNOCXX - This is a keyword in every non-C++ dialect.
-//   KEYCXX0X - This is a C++ keyword introduced to C++ in C++0x
+//   KEYCXX11 - This is a C++ keyword introduced to C++ in C++11
 //   KEYGNU   - This is a keyword if GNU extensions are enabled
 //   KEYMS    - This is a keyword if Microsoft extensions are enabled
 //   KEYNOMS  - This is a keyword that must never be enabled under
@@ -260,6 +260,7 @@ KEYWORD(_Bool                       , KEYNOCXX)
 KEYWORD(_Complex                    , KEYALL)
 KEYWORD(_Generic                    , KEYALL)
 KEYWORD(_Imaginary                  , KEYALL)
+KEYWORD(_Noreturn                   , KEYALL)
 KEYWORD(_Static_assert              , KEYALL)
 KEYWORD(__func__                    , KEYALL)
 KEYWORD(__objc_yes                  , KEYALL)
@@ -311,17 +312,17 @@ CXX_KEYWORD_OPERATOR(or_eq   , pipeequal)
 CXX_KEYWORD_OPERATOR(xor     , caret)
 CXX_KEYWORD_OPERATOR(xor_eq  , caretequal)
 
-// C++0x keywords
-KEYWORD(alignas                     , KEYCXX0X)
-KEYWORD(alignof                     , KEYCXX0X)
-KEYWORD(char16_t                    , KEYCXX0X|KEYNOMS)
-KEYWORD(char32_t                    , KEYCXX0X|KEYNOMS)
-KEYWORD(constexpr                   , KEYCXX0X)
-KEYWORD(decltype                    , KEYCXX0X)
-KEYWORD(noexcept                    , KEYCXX0X)
-KEYWORD(nullptr                     , KEYCXX0X)
-KEYWORD(static_assert               , KEYCXX0X)
-KEYWORD(thread_local                , KEYCXX0X)
+// C++11 keywords
+KEYWORD(alignas                     , KEYCXX11)
+KEYWORD(alignof                     , KEYCXX11)
+KEYWORD(char16_t                    , KEYCXX11|KEYNOMS)
+KEYWORD(char32_t                    , KEYCXX11|KEYNOMS)
+KEYWORD(constexpr                   , KEYCXX11)
+KEYWORD(decltype                    , KEYCXX11)
+KEYWORD(noexcept                    , KEYCXX11)
+KEYWORD(nullptr                     , KEYCXX11)
+KEYWORD(static_assert               , KEYCXX11)
+KEYWORD(thread_local                , KEYCXX11)
 
 // GNU Extensions (in impl-reserved namespace)
 KEYWORD(_Decimal32                  , KEYALL)
@@ -350,31 +351,34 @@ KEYWORD(typeof                      , KEYGNU)
 KEYWORD(L__FUNCTION__               , KEYMS)
 
 // GNU and MS Type Traits
-KEYWORD(__has_nothrow_assign        , KEYCXX)
-KEYWORD(__has_nothrow_copy          , KEYCXX)
-KEYWORD(__has_nothrow_constructor   , KEYCXX)
-KEYWORD(__has_trivial_assign        , KEYCXX)
-KEYWORD(__has_trivial_copy          , KEYCXX)
-KEYWORD(__has_trivial_constructor   , KEYCXX)
-KEYWORD(__has_trivial_destructor    , KEYCXX)
-KEYWORD(__has_virtual_destructor    , KEYCXX)
-KEYWORD(__is_abstract               , KEYCXX)
-KEYWORD(__is_base_of                , KEYCXX)
-KEYWORD(__is_class                  , KEYCXX)
-KEYWORD(__is_convertible_to         , KEYCXX)
-KEYWORD(__is_empty                  , KEYCXX)
-KEYWORD(__is_enum                   , KEYCXX)
-KEYWORD(__is_final                  , KEYCXX)
-KEYWORD(__is_interface_class        , KEYCXX)
+KEYWORD(__has_nothrow_assign          , KEYCXX)
+KEYWORD(__has_nothrow_move_assign     , KEYCXX)
+KEYWORD(__has_nothrow_copy            , KEYCXX)
+KEYWORD(__has_nothrow_constructor     , KEYCXX)
+KEYWORD(__has_trivial_assign          , KEYCXX)
+KEYWORD(__has_trivial_move_assign     , KEYCXX)
+KEYWORD(__has_trivial_copy            , KEYCXX)
+KEYWORD(__has_trivial_constructor     , KEYCXX)
+KEYWORD(__has_trivial_move_constructor, KEYCXX)
+KEYWORD(__has_trivial_destructor      , KEYCXX)
+KEYWORD(__has_virtual_destructor      , KEYCXX)
+KEYWORD(__is_abstract                 , KEYCXX)
+KEYWORD(__is_base_of                  , KEYCXX)
+KEYWORD(__is_class                    , KEYCXX)
+KEYWORD(__is_convertible_to           , KEYCXX)
+KEYWORD(__is_empty                    , KEYCXX)
+KEYWORD(__is_enum                     , KEYCXX)
+KEYWORD(__is_final                    , KEYCXX)
+KEYWORD(__is_interface_class          , KEYCXX)
 // Tentative name - there's no implementation of std::is_literal_type yet.
-KEYWORD(__is_literal                , KEYCXX)
+KEYWORD(__is_literal                  , KEYCXX)
 // Name for GCC 4.6 compatibility - people have already written libraries using
 // this name unfortunately.
-KEYWORD(__is_literal_type           , KEYCXX)
-KEYWORD(__is_pod                    , KEYCXX)
-KEYWORD(__is_polymorphic            , KEYCXX)
-KEYWORD(__is_trivial                , KEYCXX)
-KEYWORD(__is_union                  , KEYCXX)
+KEYWORD(__is_literal_type             , KEYCXX)
+KEYWORD(__is_pod                      , KEYCXX)
+KEYWORD(__is_polymorphic              , KEYCXX)
+KEYWORD(__is_trivial                  , KEYCXX)
+KEYWORD(__is_union                    , KEYCXX)
 
 // Clang-only C++ Type Traits
 KEYWORD(__is_trivially_constructible, KEYCXX)
@@ -448,6 +452,14 @@ ALIAS("read_only", __read_only      , KEYOPENCL)
 ALIAS("write_only", __write_only    , KEYOPENCL)
 ALIAS("read_write", __read_write    , KEYOPENCL)
 KEYWORD(__builtin_astype            , KEYOPENCL)
+KEYWORD(image1d_t                   , KEYOPENCL)
+KEYWORD(image1d_array_t             , KEYOPENCL)
+KEYWORD(image1d_buffer_t            , KEYOPENCL)
+KEYWORD(image2d_t                   , KEYOPENCL)
+KEYWORD(image2d_array_t             , KEYOPENCL)
+KEYWORD(image3d_t                   , KEYOPENCL)
+KEYWORD(sampler_t                   , KEYOPENCL)
+KEYWORD(event_t                     , KEYOPENCL)
 
 // Borland Extensions.
 KEYWORD(__pascal                    , KEYALL)
@@ -566,7 +578,7 @@ OBJC2_AT_KEYWORD(required)
 OBJC2_AT_KEYWORD(optional)
 OBJC2_AT_KEYWORD(synthesize)
 OBJC2_AT_KEYWORD(dynamic)
-OBJC2_AT_KEYWORD(__experimental_modules_import)
+OBJC2_AT_KEYWORD(import)
 
 // TODO: What to do about context-sensitive keywords like:
 //       bycopy/byref/in/inout/oneway/out?
@@ -637,6 +649,12 @@ ANNOTATION(pragma_fp_contract)
 // handles them.
 ANNOTATION(pragma_opencl_extension)
 
+// Annotations for OpenMP pragma directives - #pragma omp ...
+// The lexer produces these so that they only take effect when the parser
+// handles #pragma omp ... directives.
+ANNOTATION(pragma_openmp)
+ANNOTATION(pragma_openmp_end)
+
 #undef ANNOTATION
 #undef TESTING_KEYWORD
 #undef OBJC2_AT_KEYWORD
diff --git a/include/clang/Basic/TokenKinds.h b/include/clang/Basic/TokenKinds.h
index e850971..dcbe1da 100644
--- a/include/clang/Basic/TokenKinds.h
+++ b/include/clang/Basic/TokenKinds.h
@@ -68,15 +68,21 @@ inline bool isAnyIdentifier(TokenKind K) {
   return (K == tok::identifier) || (K == tok::raw_identifier);
 }
 
+/// \brief Return true if this is a C or C++ string-literal (or
+/// C++11 user-defined-string-literal) token.
+inline bool isStringLiteral(TokenKind K) {
+  return K == tok::string_literal || K == tok::wide_string_literal ||
+         K == tok::utf8_string_literal || K == tok::utf16_string_literal ||
+         K == tok::utf32_string_literal;
+}
+
 /// \brief Return true if this is a "literal" kind, like a numeric
 /// constant, string, etc.
 inline bool isLiteral(TokenKind K) {
-  return (K == tok::numeric_constant) || (K == tok::char_constant) ||
-         (K == tok::wide_char_constant) || (K == tok::utf16_char_constant) ||
-         (K == tok::utf32_char_constant) || (K == tok::string_literal) ||
-         (K == tok::wide_string_literal) || (K == tok::utf8_string_literal) ||
-         (K == tok::utf16_string_literal) || (K == tok::utf32_string_literal) ||
-         (K == tok::angle_string_literal);
+  return K == tok::numeric_constant || K == tok::char_constant ||
+         K == tok::wide_char_constant || K == tok::utf16_char_constant ||
+         K == tok::utf32_char_constant || isStringLiteral(K) ||
+         K == tok::angle_string_literal;
 }
 
 /// \brief Return true if this is any of tok::annot_* kinds.
diff --git a/include/clang/Basic/TypeTraits.h b/include/clang/Basic/TypeTraits.h
index 882b52d..1645796 100644
--- a/include/clang/Basic/TypeTraits.h
+++ b/include/clang/Basic/TypeTraits.h
@@ -20,11 +20,14 @@ namespace clang {
   /// \brief Names for the unary type traits.
   enum UnaryTypeTrait {
     UTT_HasNothrowAssign,
+    UTT_HasNothrowMoveAssign,
     UTT_HasNothrowCopy,
     UTT_HasNothrowConstructor,
     UTT_HasTrivialAssign,
+    UTT_HasTrivialMoveAssign,
     UTT_HasTrivialCopy,
     UTT_HasTrivialDefaultConstructor,
+    UTT_HasTrivialMoveConstructor,
     UTT_HasTrivialDestructor,
     UTT_HasVirtualDestructor,
     UTT_IsAbstract,
diff --git a/include/clang/Basic/Version.h b/include/clang/Basic/Version.h
index 3f1b4d8..7db8a2e 100644
--- a/include/clang/Basic/Version.h
+++ b/include/clang/Basic/Version.h
@@ -16,9 +16,8 @@
 #ifndef LLVM_CLANG_BASIC_VERSION_H
 #define LLVM_CLANG_BASIC_VERSION_H
 
-#include "llvm/ADT/StringRef.h"
-
 #include "clang/Basic/Version.inc"
+#include "llvm/ADT/StringRef.h"
 
 /// \brief Helper macro for CLANG_VERSION_STRING.
 #define CLANG_MAKE_VERSION_STRING2(X) #X
diff --git a/include/clang/Basic/VersionTuple.h b/include/clang/Basic/VersionTuple.h
index a94f76c..ff06a5c 100644
--- a/include/clang/Basic/VersionTuple.h
+++ b/include/clang/Basic/VersionTuple.h
@@ -55,16 +55,16 @@ public:
   unsigned getMajor() const { return Major; }
 
   /// \brief Retrieve the minor version number, if provided.
-  llvm::Optional<unsigned> getMinor() const { 
+  Optional<unsigned> getMinor() const {
     if (!HasMinor)
-      return llvm::Optional<unsigned>();
+      return None;
     return Minor;
   }
 
   /// \brief Retrieve the subminor version number, if provided.
-  llvm::Optional<unsigned> getSubminor() const { 
+  Optional<unsigned> getSubminor() const {
     if (!HasSubminor)
-      return llvm::Optional<unsigned>();
+      return None;
     return Subminor;
   }
 
diff --git a/include/clang/Basic/Visibility.h b/include/clang/Basic/Visibility.h
index e81ad91..b623b94 100644
--- a/include/clang/Basic/Visibility.h
+++ b/include/clang/Basic/Visibility.h
@@ -15,6 +15,8 @@
 #ifndef LLVM_CLANG_BASIC_VISIBILITY_H
 #define LLVM_CLANG_BASIC_VISIBILITY_H
 
+#include "clang/Basic/Linkage.h"
+
 namespace clang {
 
 /// \brief Describes the different kinds of visibility that a declaration
@@ -46,6 +48,80 @@ inline Visibility minVisibility(Visibility L, Visibility R) {
   return L < R ? L : R;
 }
 
+class LinkageInfo {
+  uint8_t linkage_    : 2;
+  uint8_t visibility_ : 2;
+  uint8_t explicit_   : 1;
+
+  void setVisibility(Visibility V, bool E) { visibility_ = V; explicit_ = E; }
+public:
+  LinkageInfo() : linkage_(ExternalLinkage), visibility_(DefaultVisibility),
+                  explicit_(false) {}
+  LinkageInfo(Linkage L, Visibility V, bool E)
+    : linkage_(L), visibility_(V), explicit_(E) {
+    assert(getLinkage() == L && getVisibility() == V &&
+           isVisibilityExplicit() == E && "Enum truncated!");
+  }
+
+  static LinkageInfo external() {
+    return LinkageInfo();
+  }
+  static LinkageInfo internal() {
+    return LinkageInfo(InternalLinkage, DefaultVisibility, false);
+  }
+  static LinkageInfo uniqueExternal() {
+    return LinkageInfo(UniqueExternalLinkage, DefaultVisibility, false);
+  }
+  static LinkageInfo none() {
+    return LinkageInfo(NoLinkage, DefaultVisibility, false);
+  }
+
+  Linkage getLinkage() const { return (Linkage)linkage_; }
+  Visibility getVisibility() const { return (Visibility)visibility_; }
+  bool isVisibilityExplicit() const { return explicit_; }
+
+  void setLinkage(Linkage L) { linkage_ = L; }
+
+  void mergeLinkage(Linkage L) {
+    setLinkage(minLinkage(getLinkage(), L));
+  }
+  void mergeLinkage(LinkageInfo other) {
+    mergeLinkage(other.getLinkage());
+  }
+
+  /// Merge in the visibility 'newVis'.
+  void mergeVisibility(Visibility newVis, bool newExplicit) {
+    Visibility oldVis = getVisibility();
+
+    // Never increase visibility.
+    if (oldVis < newVis)
+      return;
+
+    // If the new visibility is the same as the old and the new
+    // visibility isn't explicit, we have nothing to add.
+    if (oldVis == newVis && !newExplicit)
+      return;
+
+    // Otherwise, we're either decreasing visibility or making our
+    // existing visibility explicit.
+    setVisibility(newVis, newExplicit);
+  }
+  void mergeVisibility(LinkageInfo other) {
+    mergeVisibility(other.getVisibility(), other.isVisibilityExplicit());
+  }
+
+  /// Merge both linkage and visibility.
+  void merge(LinkageInfo other) {
+    mergeLinkage(other);
+    mergeVisibility(other);
+  }
+
+  /// Merge linkage and conditionally merge visibility.
+  void mergeMaybeWithVisibility(LinkageInfo other, bool withVis) {
+    mergeLinkage(other);
+    if (withVis) mergeVisibility(other);
+  }
+};
 }
 
 #endif // LLVM_CLANG_BASIC_VISIBILITY_H
diff --git a/include/clang/CodeGen/ModuleBuilder.h b/include/clang/CodeGen/ModuleBuilder.h
index ba9d1f9..cda7863 100644
--- a/include/clang/CodeGen/ModuleBuilder.h
+++ b/include/clang/CodeGen/ModuleBuilder.h
@@ -26,6 +26,7 @@ namespace clang {
   class DiagnosticsEngine;
   class LangOptions;
   class CodeGenOptions;
+  class TargetOptions;
 
   class CodeGenerator : public ASTConsumer {
     virtual void anchor();
@@ -40,6 +41,7 @@ namespace clang {
   CodeGenerator *CreateLLVMCodeGen(DiagnosticsEngine &Diags,
                                    const std::string &ModuleName,
                                    const CodeGenOptions &CGO,
+                                   const TargetOptions &TO,
                                    llvm::LLVMContext& C);
 }
 
diff --git a/include/clang/Driver/Arg.h b/include/clang/Driver/Arg.h
index 3b3829a..662a2e2 100644
--- a/include/clang/Driver/Arg.h
+++ b/include/clang/Driver/Arg.h
@@ -15,9 +15,8 @@
 #ifndef CLANG_DRIVER_ARG_H_
 #define CLANG_DRIVER_ARG_H_
 
-#include "clang/Driver/Option.h"
-
 #include "Util.h"
+#include "clang/Driver/Option.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
 #include <string>
@@ -52,7 +51,7 @@ namespace driver {
     /// ArgList.
     unsigned Index;
 
-    /// \brief Was this argument used to effect compilation?
+    /// \brief Was this argument used to affect compilation?
     ///
     /// This is used for generating "argument unused" diagnostics.
     mutable unsigned Claimed : 1;
@@ -72,7 +71,7 @@ namespace driver {
         const char *Value0, const char *Value1, const Arg *BaseArg = 0);
     ~Arg();
 
-    const Option getOption() const { return Opt; }
+    Option getOption() const { return Opt; }
     StringRef getSpelling() const { return Spelling; }
     unsigned getIndex() const { return Index; }
 
diff --git a/include/clang/Driver/ArgList.h b/include/clang/Driver/ArgList.h
index 72ed7bf..3967dcc 100644
--- a/include/clang/Driver/ArgList.h
+++ b/include/clang/Driver/ArgList.h
@@ -11,12 +11,11 @@
 #define CLANG_DRIVER_ARGLIST_H_
 
 #include "clang/Basic/LLVM.h"
-#include "clang/Driver/Option.h"
 #include "clang/Driver/OptSpecifier.h"
+#include "clang/Driver/Option.h"
 #include "clang/Driver/Util.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
-
 #include <list>
 #include <string>
 #include <vector>
@@ -291,6 +290,8 @@ namespace driver {
                                          StringRef RHS) const;
 
     /// @}
+
+    void dump();
   };
 
   class InputArgList : public ArgList  {
diff --git a/include/clang/Driver/CC1AsOptions.td b/include/clang/Driver/CC1AsOptions.td
index 9fd855a..2749bcd 100644
--- a/include/clang/Driver/CC1AsOptions.td
+++ b/include/clang/Driver/CC1AsOptions.td
@@ -37,6 +37,8 @@ def L : Flag<["-"], "L">,
   HelpText<"Save temporary labels in the symbol table. "
            "Note this may change .s semantics, it should almost never be used "
            "on compiler generated code!">;
+def main_file_name : Separate<["-"], "main-file-name">,
+  HelpText<"Main file name to use for debug info">;
 
 //===----------------------------------------------------------------------===//
 // Frontend Options
@@ -86,5 +88,11 @@ def fatal_warnings : Flag<["--"], "fatal-warnings">,
 
 def g : Flag<["-"], "g">, HelpText<"Generate source level debug information">;
 
+def fdebug_compilation_dir : Separate<["-"], "fdebug-compilation-dir">,
+  HelpText<"The compilation directory to embed in the debug info.">;
+
 def dwarf_debug_flags : Separate<["-"], "dwarf-debug-flags">,
   HelpText<"The string to embed in the Dwarf debug flags record.">;
+
+def dwarf_debug_producer : Separate<["-"], "dwarf-debug-producer">,
+  HelpText<"The string to embed in the Dwarf debug AT_producer record.">;
diff --git a/include/clang/Driver/CC1Options.td b/include/clang/Driver/CC1Options.td
index 3ff2549..e4dd345 100644
--- a/include/clang/Driver/CC1Options.td
+++ b/include/clang/Driver/CC1Options.td
@@ -81,15 +81,6 @@ def analyzer_inline_max_stack_depth : Separate<["-"], "analyzer-inline-max-stack
 def analyzer_inline_max_stack_depth_EQ : Joined<["-"], "analyzer-inline-max-stack-depth=">, 
   Alias<analyzer_inline_max_stack_depth>;
   
-def analyzer_inline_max_function_size : Separate<["-"], "analyzer-inline-max-function-size">,
-  HelpText<"Bound on the number of basic blocks in an inlined function (200 by default)">;
-def analyzer_inline_max_function_size_EQ : Joined<["-"], "analyzer-inline-max-function-size=">, 
-  Alias<analyzer_inline_max_function_size>;
-
-def analyzer_ipa : Separate<["-"], "analyzer-ipa">,
-  HelpText<"Specify the inter-procedural analysis mode">;
-def analyzer_ipa_EQ : Joined<["-"], "analyzer-ipa=">, Alias<analyzer_ipa>;
-  
 def analyzer_inlining_mode : Separate<["-"], "analyzer-inlining-mode">,
   HelpText<"Specify the function selection heuristic used during inlining">;
 def analyzer_inlining_mode_EQ : Joined<["-"], "analyzer-inlining-mode=">, Alias<analyzer_inlining_mode>;
@@ -97,8 +88,6 @@ def analyzer_inlining_mode_EQ : Joined<["-"], "analyzer-inlining-mode=">, Alias<
 def analyzer_disable_retry_exhausted : Flag<["-"], "analyzer-disable-retry-exhausted">,
   HelpText<"Do not re-analyze paths leading to exhausted nodes with a different strategy (may decrease code coverage)">;
   
-def analyzer_max_nodes : Separate<["-"], "analyzer-max-nodes">,
-  HelpText<"The maximum number of nodes the analyzer can generate (150000 default, 0 = no limit)">;
 def analyzer_max_loop : Separate<["-"], "analyzer-max-loop">,
   HelpText<"The maximum number of times the analyzer will go through a loop">;
 def analyzer_stats : Flag<["-"], "analyzer-stats">,
@@ -145,6 +134,8 @@ def dwarf_debug_flags : Separate<["-"], "dwarf-debug-flags">,
   HelpText<"The string to embed in the Dwarf debug flags record.">;
 def dwarf_column_info : Flag<["-"], "dwarf-column-info">,
   HelpText<"Turn on column location information.">;
+def split_dwarf : Flag<["-"], "split-dwarf">,
+  HelpText<"Split out the dwarf .dwo sections">;
 def fforbid_guard_variables : Flag<["-"], "fforbid-guard-variables">,
   HelpText<"Emit an error if a C++ static local initializer would need a guard variable">;
 def no_implicit_float : Flag<["-"], "no-implicit-float">,
@@ -158,10 +149,20 @@ def femit_coverage_data: Flag<["-"], "femit-coverage-data">,
 def coverage_file : Separate<["-"], "coverage-file">,
   HelpText<"Emit coverage data to this filename. The extension will be replaced.">;
 def coverage_file_EQ : Joined<["-"], "coverage-file=">, Alias<coverage_file>;
+def coverage_cfg_checksum : Flag<["-"], "coverage-cfg-checksum">,
+  HelpText<"Emit CFG checksum for functions in .gcno files.">;
+def coverage_no_function_names_in_data : Flag<["-"], "coverage-no-function-names-in-data">,
+  HelpText<"Emit function names in .gcda files.">;
+def coverage_version_EQ : Joined<["-"], "coverage-version=">,
+  HelpText<"Four-byte version string for gcov files.">;
+def test_coverage : Flag<["-"], "test-coverage">,
+  HelpText<"Do not generate coverage files or remove coverage changes from IR">;
 def fuse_register_sized_bitfield_access: Flag<["-"], "fuse-register-sized-bitfield-access">,
   HelpText<"Use register sized accesses to bit-fields, when possible.">;
 def relaxed_aliasing : Flag<["-"], "relaxed-aliasing">,
   HelpText<"Turn off Type Based Alias Analysis">;
+def struct_path_tbaa : Flag<["-"], "struct-path-tbaa">,
+  HelpText<"Turn on struct-path aware Type Based Alias Analysis">;
 def masm_verbose : Flag<["-"], "masm-verbose">,
   HelpText<"Generate verbose assembly output">;
 def mcode_model : Separate<["-"], "mcode-model">,
@@ -185,6 +186,8 @@ def mlimit_float_precision : Separate<["-"], "mlimit-float-precision">,
   HelpText<"Limit float precision to the given value">;
 def mno_exec_stack : Flag<["-"], "mnoexecstack">,
   HelpText<"Mark the file as not needing an executable stack">;
+def split_stacks : Flag<["-"], "split-stacks">,
+  HelpText<"Try to use a split stack if possible.">;
 def mno_zero_initialized_in_bss : Flag<["-"], "mno-zero-initialized-in-bss">,
   HelpText<"Do not put zero initialized data in the BSS">;
 def backend_option : Separate<["-"], "backend-option">,
@@ -197,8 +200,6 @@ def mrelocation_model : Separate<["-"], "mrelocation-model">,
   HelpText<"The relocation model to use">;
 def munwind_tables : Flag<["-"], "munwind-tables">,
   HelpText<"Generate unwinding tables for all functions">;
-def fuse_init_array : Flag<["-"], "fuse-init-array">,
-  HelpText<"Use .init_array instead of .ctors">;
 def mconstructor_aliases : Flag<["-"], "mconstructor-aliases">,
   HelpText<"Emit complete constructors and destructors as aliases when possible">;
 def mlink_bitcode_file : Separate<["-"], "mlink-bitcode-file">,
@@ -217,9 +218,6 @@ def header_include_file : Separate<["-"], "header-include-file">,
 // Diagnostic Options
 //===----------------------------------------------------------------------===//
 
-def dump_build_information : Separate<["-"], "dump-build-information">,
-  MetaVarName<"<filename>">,
-  HelpText<"output a dump of some build information to a file">;
 def diagnostic_log_file : Separate<["-"], "diagnostic-log-file">,
   HelpText<"Filename (or -) to log diagnostics to">;
 def diagnostic_serialized_file : Separate<["-"], "serialize-diagnostic-file">,
@@ -230,6 +228,8 @@ def fdiagnostics_format : Separate<["-"], "fdiagnostics-format">,
   HelpText<"Change diagnostic formatting to match IDE and command line tools">;
 def fdiagnostics_show_category : Separate<["-"], "fdiagnostics-show-category">,
   HelpText<"Print diagnostic category">;
+def fno_diagnostics_use_presumed_location : Flag<["-"], "fno-diagnostics-use-presumed-location">,
+  HelpText<"Ignore #line directives when displaying diagnostic locations">;
 def ftabstop : Separate<["-"], "ftabstop">, MetaVarName<"<N>">,
   HelpText<"Set the tab stop distance.">;
 def ferror_limit : Separate<["-"], "ferror-limit">, MetaVarName<"<N>">,
@@ -245,6 +245,9 @@ def fmessage_length : Separate<["-"], "fmessage-length">, MetaVarName<"<N>">,
 def Wno_rewrite_macros : Flag<["-"], "Wno-rewrite-macros">,
   HelpText<"Silence ObjC rewriting warnings">;
 
+def fwarn_on_spellcheck : Flag<["-"], "fwarn-on-spellcheck">,
+  HelpText<"Emit warning if spell-check is initiated, for testing">;
+
 //===----------------------------------------------------------------------===//
 // Frontend Options
 //===----------------------------------------------------------------------===//
@@ -283,8 +286,6 @@ def plugin_arg : JoinedAndSeparate<["-"], "plugin-arg-">,
     HelpText<"Pass <arg> to plugin <name>">;
 def add_plugin : Separate<["-"], "add-plugin">, MetaVarName<"<name>">,
   HelpText<"Use the named plugin action in addition to the default action">;
-def resource_dir : Separate<["-"], "resource-dir">,
-  HelpText<"The directory which holds the compiler resource files">;
 def version : Flag<["-"], "version">,
   HelpText<"Print the compiler version">;
 def ast_dump_filter : Separate<["-"], "ast-dump-filter">,
@@ -292,6 +293,8 @@ def ast_dump_filter : Separate<["-"], "ast-dump-filter">,
   HelpText<"Use with -ast-dump or -ast-print to dump/print only AST declaration"
            " nodes having a certain substring in a qualified name. Use"
            " -ast-list to list all filterable declaration node names.">;
+def fno_modules_global_index : Flag<["-"], "fno-modules-global-index">,
+  HelpText<"Do not automatically generate or update the global module index">;
 
 let Group = Action_Group in {
 
@@ -389,6 +392,8 @@ def fhidden_weak_vtables : Flag<["-"], "fhidden-weak-vtables">,
   HelpText<"Generate weak vtables and RTTI with hidden visibility">;
 def main_file_name : Separate<["-"], "main-file-name">,
   HelpText<"Main file name to use for debug info">;
+def split_dwarf_file : Separate<["-"], "split-dwarf-file">,
+  HelpText<"File name to use for split dwarf debug info output">;
 def fno_signed_char : Flag<["-"], "fno-signed-char">,
   HelpText<"Char is unsigned">;
 def fno_wchar : Flag<["-"], "fno-wchar">,
@@ -425,11 +430,15 @@ def stack_protector : Separate<["-"], "stack-protector">,
 def stack_protector_buffer_size : Separate<["-"], "stack-protector-buffer-size">,
   HelpText<"Lower bound for a buffer to be considered for stack protection">;
 def fvisibility : Separate<["-"], "fvisibility">,
-  HelpText<"Default symbol visibility">;
+  HelpText<"Default type and symbol visibility">;
+def ftype_visibility : Separate<["-"], "ftype-visibility">,
+  HelpText<"Default type visibility">;
 def ftemplate_depth : Separate<["-"], "ftemplate-depth">,
   HelpText<"Maximum depth of recursive template instantiation">;
 def fconstexpr_depth : Separate<["-"], "fconstexpr-depth">,
   HelpText<"Maximum depth of recursive constexpr function calls">;
+def fbracket_depth : Separate<["-"], "fbracket-depth">,
+  HelpText<"Maximum nesting level for parentheses, brackets, and braces">;
 def fconst_strings : Flag<["-"], "fconst-strings">,
   HelpText<"Use a const qualified type for string literals in C and ObjC">;
 def fno_const_strings : Flag<["-"], "fno-const-strings">,
diff --git a/include/clang/Driver/Compilation.h b/include/clang/Driver/Compilation.h
index 5f63aa7..15c5e40 100644
--- a/include/clang/Driver/Compilation.h
+++ b/include/clang/Driver/Compilation.h
@@ -20,6 +20,7 @@ namespace driver {
   class DerivedArgList;
   class Driver;
   class InputArgList;
+  class JobAction;
   class JobList;
   class ToolChain;
 
@@ -54,11 +55,11 @@ class Compilation {
   ArgStringList TempFiles;
 
   /// Result files which should be removed on failure.
-  ArgStringList ResultFiles;
+  ArgStringMap ResultFiles;
 
   /// Result files which are generated correctly on failure, and which should
   /// only be removed if we crash.
-  ArgStringList FailureResultFiles;
+  ArgStringMap FailureResultFiles;
 
   /// Redirection for stdout, stderr, etc.
   const llvm::sys::Path **Redirects;
@@ -88,9 +89,9 @@ public:
 
   const ArgStringList &getTempFiles() const { return TempFiles; }
 
-  const ArgStringList &getResultFiles() const { return ResultFiles; }
+  const ArgStringMap &getResultFiles() const { return ResultFiles; }
 
-  const ArgStringList &getFailureResultFiles() const {
+  const ArgStringMap &getFailureResultFiles() const {
     return FailureResultFiles;
   }
 
@@ -113,24 +114,40 @@ public:
 
   /// addResultFile - Add a file to remove on failure, and returns its
   /// argument.
-  const char *addResultFile(const char *Name) {
-    ResultFiles.push_back(Name);
+  const char *addResultFile(const char *Name, const JobAction *JA) {
+    ResultFiles[JA] = Name;
     return Name;
   }
 
   /// addFailureResultFile - Add a file to remove if we crash, and returns its
   /// argument.
-  const char *addFailureResultFile(const char *Name) {
-    FailureResultFiles.push_back(Name);
+  const char *addFailureResultFile(const char *Name, const JobAction *JA) {
+    FailureResultFiles[JA] = Name;
     return Name;
   }
 
+  /// CleanupFile - Delete a given file.
+  ///
+  /// \param IssueErrors - Report failures as errors.
+  /// \return Whether the file was removed successfully.
+  bool CleanupFile(const char *File, bool IssueErrors = false) const;
+
   /// CleanupFileList - Remove the files in the given list.
   ///
   /// \param IssueErrors - Report failures as errors.
   /// \return Whether all files were removed successfully.
   bool CleanupFileList(const ArgStringList &Files,
-                       bool IssueErrors=false) const;
+                       bool IssueErrors = false) const;
+
+  /// CleanupFileMap - Remove the files in the given map.
+  ///
+  /// \param JA - If specified, only delete the files associated with this
+  /// JobAction.  Otherwise, delete all files in the map.
+  /// \param IssueErrors - Report failures as errors.
+  /// \return Whether all files were removed successfully.
+  bool CleanupFileMap(const ArgStringMap &Files,
+                      const JobAction *JA,
+                      bool IssueErrors = false) const;
 
   /// PrintJob - Print one job in -### format.
   ///
@@ -158,10 +175,10 @@ public:
 
   /// ExecuteJob - Execute a single job.
   ///
-  /// \param FailingCommand - For non-zero results, this will be set to the
-  /// Command which failed.
-  /// \return The accumulated result code of the job.
-  int ExecuteJob(const Job &J, const Command *&FailingCommand) const;
+  /// \param FailingCommands - For non-zero results, this will be a vector of
+  /// failing commands and their associated result code.
+  void ExecuteJob(const Job &J,
+     SmallVectorImpl< std::pair<int, const Command *> > &FailingCommands) const;
 
   /// initCompilationForDiagnostics - Remove stale state and suppress output
   /// so compilation can be reexecuted to generate additional diagnostic
diff --git a/include/clang/Driver/Driver.h b/include/clang/Driver/Driver.h
index b752ce6..1330e95 100644
--- a/include/clang/Driver/Driver.h
+++ b/include/clang/Driver/Driver.h
@@ -11,11 +11,10 @@
 #define CLANG_DRIVER_DRIVER_H_
 
 #include "clang/Basic/Diagnostic.h"
-
+#include "clang/Basic/LLVM.h"
 #include "clang/Driver/Phases.h"
 #include "clang/Driver/Types.h"
 #include "clang/Driver/Util.h"
-
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/Triple.h"
@@ -25,9 +24,6 @@
 #include <set>
 #include <string>
 
-namespace llvm {
-  template<typename T> class ArrayRef;
-}
 namespace clang {
 namespace driver {
   class Action;
@@ -178,7 +174,6 @@ public:
   Driver(StringRef _ClangExecutable,
          StringRef _DefaultTargetTriple,
          StringRef _DefaultImageName,
-         bool IsProduction,
          DiagnosticsEngine &_Diags);
   ~Driver();
 
@@ -277,7 +272,7 @@ public:
   /// to just running the subprocesses, for example reporting errors, removing
   /// temporary files, etc.
   int ExecuteCompilation(const Compilation &C,
-                         const Command *&FailingCommand) const;
+     SmallVectorImpl< std::pair<int, const Command *> > &FailingCommands) const;
   
   /// generateCompilationDiagnostics - Generate diagnostics information 
   /// including preprocessed source file(s).
@@ -363,10 +358,9 @@ public:
   /// GCC goes to extra lengths here to be a bit more robust.
   std::string GetTemporaryPath(StringRef Prefix, const char *Suffix) const;
 
-  /// ShouldUseClangCompilar - Should the clang compiler be used to
+  /// ShouldUseClangCompiler - Should the clang compiler be used to
   /// handle this action.
-  bool ShouldUseClangCompiler(const Compilation &C, const JobAction &JA,
-                              const llvm::Triple &ArchName) const;
+  bool ShouldUseClangCompiler(const JobAction &JA) const;
 
   bool IsUsingLTO(const ArgList &Args) const;
 
diff --git a/include/clang/Driver/Job.h b/include/clang/Driver/Job.h
index 84f5ee1..045b5d8 100644
--- a/include/clang/Driver/Job.h
+++ b/include/clang/Driver/Job.h
@@ -10,9 +10,9 @@
 #ifndef CLANG_DRIVER_JOB_H_
 #define CLANG_DRIVER_JOB_H_
 
+#include "clang/Basic/LLVM.h"
 #include "clang/Driver/Util.h"
 #include "llvm/ADT/SmallVector.h"
-#include "clang/Basic/LLVM.h"
 
 namespace clang {
 namespace driver {
diff --git a/include/clang/Driver/OptSpecifier.h b/include/clang/Driver/OptSpecifier.h
index bb1cd17..e683ef3 100644
--- a/include/clang/Driver/OptSpecifier.h
+++ b/include/clang/Driver/OptSpecifier.h
@@ -10,6 +10,8 @@
 #ifndef CLANG_DRIVER_OPTSPECIFIER_H
 #define CLANG_DRIVER_OPTSPECIFIER_H
 
+#include "llvm/Support/Compiler.h"
+
 namespace clang {
 namespace driver {
   class Option;
@@ -19,7 +21,7 @@ namespace driver {
     unsigned ID;
 
   private:
-    explicit OptSpecifier(bool); // DO NOT IMPLEMENT
+    explicit OptSpecifier(bool) LLVM_DELETED_FUNCTION;
 
   public:
     OptSpecifier() : ID(0) {}
diff --git a/include/clang/Driver/Option.h b/include/clang/Driver/Option.h
index c3db773..764934f 100644
--- a/include/clang/Driver/Option.h
+++ b/include/clang/Driver/Option.h
@@ -10,10 +10,10 @@
 #ifndef CLANG_DRIVER_OPTION_H_
 #define CLANG_DRIVER_OPTION_H_
 
+#include "clang/Basic/LLVM.h"
 #include "clang/Driver/OptTable.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/ErrorHandling.h"
-#include "clang/Basic/LLVM.h"
 
 namespace clang {
 namespace driver {
diff --git a/include/clang/Driver/Options.td b/include/clang/Driver/Options.td
index 77ba17a..112feb7 100644
--- a/include/clang/Driver/Options.td
+++ b/include/clang/Driver/Options.td
@@ -152,7 +152,8 @@ def E : Flag<["-"], "E">, Flags<[DriverOption,CC1Option]>, Group<Action_Group>,
   HelpText<"Only run the preprocessor">;
 def F : JoinedOrSeparate<["-"], "F">, Flags<[RenderJoined,CC1Option]>,
     HelpText<"Add directory to framework include search path">;
-def G : Separate<["-"], "G">, Flags<[DriverOption]>;
+def G : JoinedOrSeparate<["-"], "G">, Flags<[DriverOption]>;
+def G_EQ : Joined<["-"], "G=">, Flags<[DriverOption]>;
 def H : Flag<["-"], "H">, Flags<[CC1Option]>,
     HelpText<"Show header includes and nesting depth">;
 def I_ : Flag<["-"], "I-">, Group<I_Group>;
@@ -290,6 +291,7 @@ def faccess_control : Flag<["-"], "faccess-control">, Group<f_Group>;
 def fallow_unsupported : Flag<["-"], "fallow-unsupported">, Group<f_Group>;
 def faltivec : Flag<["-"], "faltivec">, Group<f_Group>, Flags<[CC1Option]>,
   HelpText<"Enable AltiVec vector initializer syntax">;
+def fno_altivec : Flag<["-"], "fno-altivec">, Group<f_Group>, Flags<[CC1Option]>;
 def fapple_kext : Flag<["-"], "fapple-kext">, Group<f_Group>, Flags<[CC1Option]>,
   HelpText<"Use Apple's kernel extensions ABI">;
 def fapple_pragma_pack : Flag<["-"], "fapple-pragma-pack">, Group<f_Group>, Flags<[CC1Option]>,
@@ -300,7 +302,7 @@ def fthread_sanitizer : Flag<["-"], "fthread-sanitizer">, Group<f_Group>;
 def fno_thread_sanitizer : Flag<["-"], "fno-thread-sanitizer">, Group<f_Group>;
 def fasm : Flag<["-"], "fasm">, Group<f_Group>;
 
-def fasm_blocks : Flag<["-"], "fasm-blocks">, Group<f_Group>;
+def fasm_blocks : Flag<["-"], "fasm-blocks">, Group<f_Group>, Flags<[CC1Option]>;
 def fno_asm_blocks : Flag<["-"], "fno-asm-blocks">, Group<f_Group>;
 
 def fassume_sane_operator_new : Flag<["-"], "fassume-sane-operator-new">, Group<f_Group>;
@@ -325,6 +327,9 @@ def fcatch_undefined_behavior : Flag<["-"], "fcatch-undefined-behavior">, Group<
 def fclasspath_EQ : Joined<["-"], "fclasspath=">, Group<f_Group>;
 def fcolor_diagnostics : Flag<["-"], "fcolor-diagnostics">, Group<f_Group>, Flags<[CC1Option]>,
   HelpText<"Use colors in diagnostics">;
+def fcomment_block_commands : CommaJoined<["-"], "fcomment-block-commands=">, Group<f_clang_Group>, Flags<[CC1Option]>,
+  HelpText<"Treat each comma separated argument in <arg> as a documentation comment block command">,
+  MetaVarName<"<arg>">;
 def fcommon : Flag<["-"], "fcommon">, Group<f_Group>;
 def fcompile_resource_EQ : Joined<["-"], "fcompile-resource=">, Group<f_Group>;
 def fconstant_cfstrings : Flag<["-"], "fconstant-cfstrings">, Group<f_Group>;
@@ -374,6 +379,10 @@ def ferror_limit_EQ : Joined<["-"], "ferror-limit=">, Group<f_Group>;
 def fexceptions : Flag<["-"], "fexceptions">, Group<f_Group>, Flags<[CC1Option]>,
   HelpText<"Enable support for exception handling">;
 def fextdirs_EQ : Joined<["-"], "fextdirs=">, Group<f_Group>;
+def fextended_identifiers : Flag<["-"], "fextended-identifiers">,
+    Group<clang_ignored_f_Group>;
+def fno_extended_identifiers : Flag<["-"], "fno-extended-identifiers">,
+    Group<f_Group>, Flags<[Unsupported]>;
 def fhosted : Flag<["-"], "fhosted">, Group<f_Group>;
 def ffast_math : Flag<["-"], "ffast-math">, Group<f_Group>, Flags<[CC1Option]>,
   HelpText<"Enable the *frontend*'s 'fast-math' mode. This has no effect on "
@@ -383,6 +392,7 @@ def fno_fast_math : Flag<["-"], "fno-fast-math">, Group<f_Group>;
 def fmath_errno : Flag<["-"], "fmath-errno">, Group<f_Group>, Flags<[CC1Option]>,
   HelpText<"Require math functions to indicate errors by setting errno">;
 def fno_math_errno : Flag<["-"], "fno-math-errno">, Group<f_Group>;
+def fbracket_depth_EQ : Joined<["-"], "fbracket-depth=">, Group<f_Group>;
 def fsignaling_math : Flag<["-"], "fsignaling-math">, Group<f_Group>;
 def fno_signaling_math : Flag<["-"], "fno-signaling-math">, Group<f_Group>;
 def fsanitize_EQ : CommaJoined<["-"], "fsanitize=">, Group<f_clang_Group>,
@@ -391,6 +401,32 @@ def fsanitize_EQ : CommaJoined<["-"], "fsanitize=">, Group<f_clang_Group>,
                             "address (memory errors) | thread (race detection) | "
                             "undefined (miscellaneous undefined behavior)">;
 def fno_sanitize_EQ : CommaJoined<["-"], "fno-sanitize=">, Group<f_clang_Group>;
+def fsanitize_address_zero_base_shadow : Flag<["-"], "fsanitize-address-zero-base-shadow">,
+                                         Group<f_clang_Group>, Flags<[CC1Option]>,
+                                         HelpText<"Make AddressSanitizer map shadow memory"
+                                                  "at zero offset">;
+def fno_sanitize_address_zero_base_shadow : Flag<["-"], "fno-sanitize-address-zero-base-shadow">,
+                                            Group<f_clang_Group>;
+def fsanitize_blacklist : Joined<["-"], "fsanitize-blacklist=">,
+                          Group<f_clang_Group>, Flags<[CC1Option]>,
+                          HelpText<"Path to blacklist file for sanitizers">;
+def fno_sanitize_blacklist : Flag<["-"], "fno-sanitize-blacklist">,
+                             Group<f_clang_Group>,
+                             HelpText<"Don't use blacklist file for sanitizers">;
+def fsanitize_memory_track_origins : Flag<["-"], "fsanitize-memory-track-origins">,
+                                     Group<f_clang_Group>, Flags<[CC1Option]>,
+                                     HelpText<"Enable origins tracking in MemorySanitizer">;
+def fno_sanitize_memory_track_origins : Flag<["-"], "fno-sanitize-memory-track-origins">,
+                                        Group<f_clang_Group>;
+def fsanitize_recover : Flag<["-"], "fsanitize-recover">,
+                        Group<f_clang_Group>;
+def fno_sanitize_recover : Flag<["-"], "fno-sanitize-recover">,
+                           Group<f_clang_Group>, Flags<[CC1Option]>,
+                           HelpText<"Disable sanitizer check recovery">;
+def fsanitize_undefined_trap_on_error : Flag<["-"], "fsanitize-undefined-trap-on-error">,
+                                        Group<f_clang_Group>, Flags<[CC1Option]>;
+def fno_sanitize_undefined_trap_on_error : Flag<["-"], "fno-sanitize-undefined-trap-on-error">,
+                                           Group<f_clang_Group>;
 def funsafe_math_optimizations : Flag<["-"], "funsafe-math-optimizations">,
   Group<f_Group>;
 def fno_unsafe_math_optimizations : Flag<["-"], "fno-unsafe-math-optimizations">,
@@ -453,8 +489,6 @@ def fmerge_all_constants : Flag<["-"], "fmerge-all-constants">, Group<f_Group>;
 def fmessage_length_EQ : Joined<["-"], "fmessage-length=">, Group<f_Group>;
 def fms_extensions : Flag<["-"], "fms-extensions">, Group<f_Group>, Flags<[CC1Option]>,
   HelpText<"Accept some non-standard constructs supported by the Microsoft compiler">;
-def fenable_experimental_ms_inline_asm : Flag<["-"], "fenable-experimental-ms-inline-asm">, Group<f_Group>, Flags<[CC1Option]>,
-  HelpText<"Enable support for Microsoft style inine assembly">;
 def fms_compatibility : Flag<["-"], "fms-compatibility">, Group<f_Group>, Flags<[CC1Option]>,
   HelpText<"Enable Microsoft compatibility mode">;
 def fmsc_version : Joined<["-"], "fmsc-version=">, Group<f_Group>, Flags<[CC1Option]>,
@@ -462,11 +496,23 @@ def fmsc_version : Joined<["-"], "fmsc-version=">, Group<f_Group>, Flags<[CC1Opt
 def fdelayed_template_parsing : Flag<["-"], "fdelayed-template-parsing">, Group<f_Group>,
   HelpText<"Parse templated function definitions at the end of the "
            "translation unit ">,  Flags<[CC1Option]>;
-def fmodule_cache_path : Separate<["-"], "fmodule-cache-path">, Group<i_Group>, 
+def fmodules_cache_path : Joined<["-"], "fmodules-cache-path=">, Group<i_Group>,
   Flags<[NoForward,CC1Option]>, MetaVarName<"<directory>">,
   HelpText<"Specify the module cache path">;
+def fmodules_prune_interval : Joined<["-"], "fmodules-prune-interval=">, Group<i_Group>,
+  Flags<[CC1Option]>, MetaVarName<"<seconds>">,
+  HelpText<"Specify the interval (in seconds) between attempts to prune the module cache">;
+def fmodules_prune_after : Joined<["-"], "fmodules-prune-after=">, Group<i_Group>,
+  Flags<[CC1Option]>, MetaVarName<"<seconds>">,
+  HelpText<"Specify the interval (in seconds) after which a module file will be considered unused">;
 def fmodules : Flag <["-"], "fmodules">, Group<f_Group>, Flags<[NoForward,CC1Option]>,
   HelpText<"Enable the 'modules' language feature">;
+def fmodules_autolink : Flag <["-"], "fmodules-autolink">, Group<f_Group>, Flags<[NoForward,CC1Option]>,
+  HelpText<"Enable autolinking of the libraries for imported modules">;
+def fno_modules_autolink : Flag <["-"], "fno-modules-autolink">, Group<f_Group>,
+  HelpText<"Disable autolinking of the libraries for imported modules">;
+def fmodules_ignore_macro : Joined<["-"], "fmodules-ignore-macro=">, Group<f_Group>, Flags<[CC1Option]>,
+  HelpText<"Ignore the definition of the given macro when building and loading modules">;
 def fretain_comments_from_system_headers : Flag<["-"], "fretain-comments-from-system-headers">, Group<f_Group>, Flags<[CC1Option]>;
 
 def fmudflapth : Flag<["-"], "fmudflapth">, Group<f_Group>;
@@ -541,12 +587,15 @@ def fno_spell_checking : Flag<["-"], "fno-spell-checking">, Group<f_Group>,
   Flags<[CC1Option]>, HelpText<"Disable spell-checking">;
 def fno_stack_protector : Flag<["-"], "fno-stack-protector">, Group<f_Group>;
 def fno_strict_aliasing : Flag<["-"], "fno-strict-aliasing">, Group<f_Group>;
+def fstruct_path_tbaa : Flag<["-"], "fstruct-path-tbaa">, Group<f_Group>;
 def fno_strict_enums : Flag<["-"], "fno-strict-enums">, Group<f_Group>;
 def fno_strict_overflow : Flag<["-"], "fno-strict-overflow">, Group<f_Group>;
 def fno_threadsafe_statics : Flag<["-"], "fno-threadsafe-statics">, Group<f_Group>,
   Flags<[CC1Option]>, HelpText<"Do not emit code to make initialization of local statics thread safe">;
 def fno_use_cxa_atexit : Flag<["-"], "fno-use-cxa-atexit">, Group<f_Group>, Flags<[CC1Option]>,
   HelpText<"Don't use __cxa_atexit for calling destructors">;
+def fno_use_init_array : Flag<["-"], "fno-use-init-array">, Group<f_Group>, Flags<[CC1Option]>,
+  HelpText<"Don't use .init_array instead of .ctors">;
 def fno_unit_at_a_time : Flag<["-"], "fno-unit-at-a-time">, Group<f_Group>;
 def fno_unwind_tables : Flag<["-"], "fno-unwind-tables">, Group<f_Group>;
 def fno_verbose_asm : Flag<["-"], "fno-verbose-asm">, Group<f_Group>;
@@ -590,7 +639,7 @@ def fno_objc_nonfragile_abi : Flag<["-"], "fno-objc-nonfragile-abi">, Group<f_Gr
 def fobjc_sender_dependent_dispatch : Flag<["-"], "fobjc-sender-dependent-dispatch">, Group<f_Group>;
 def fobjc : Flag<["-"], "fobjc">, Group<f_Group>;
 def fomit_frame_pointer : Flag<["-"], "fomit-frame-pointer">, Group<f_Group>;
-def fopenmp : Flag<["-"], "fopenmp">, Group<f_Group>;
+def fopenmp : Flag<["-"], "fopenmp">, Group<f_Group>, Flags<[CC1Option]>;
 def fno_optimize_sibling_calls : Flag<["-"], "fno-optimize-sibling-calls">, Group<f_Group>;
 def foptimize_sibling_calls : Flag<["-"], "foptimize-sibling-calls">, Group<f_Group>;
 def force__cpusubtype__ALL : Flag<["-"], "force_cpusubtype_ALL">;
@@ -627,6 +676,7 @@ def fshow_source_location : Flag<["-"], "fshow-source-location">, Group<f_Group>
 def fspell_checking : Flag<["-"], "fspell-checking">, Group<f_Group>;
 def fsigned_bitfields : Flag<["-"], "fsigned-bitfields">, Group<f_Group>;
 def fsigned_char : Flag<["-"], "fsigned-char">, Group<f_Group>;
+def fsplit_stack : Flag<["-"], "fsplit-stack">, Group<f_Group>;
 def fstack_protector_all : Flag<["-"], "fstack-protector-all">, Group<f_Group>;
 def fstack_protector : Flag<["-"], "fstack-protector">, Group<f_Group>;
 def fstrict_aliasing : Flag<["-"], "fstrict-aliasing">, Group<f_Group>;
@@ -641,6 +691,16 @@ def ftemplate_depth_ : Joined<["-"], "ftemplate-depth-">, Group<f_Group>;
 def ftemplate_backtrace_limit_EQ : Joined<["-"], "ftemplate-backtrace-limit=">,
                                    Group<f_Group>;
 def ftest_coverage : Flag<["-"], "ftest-coverage">, Group<f_Group>;
+def fvectorize : Flag<["-"], "fvectorize">, Group<f_Group>,
+  HelpText<"Enable the loop vectorization passes">;
+def fno_vectorize : Flag<["-"], "fno-vectorize">, Group<f_Group>;
+def ftree_vectorize : Flag<["-"], "ftree-vectorize">, Alias<fvectorize>;
+def fno_tree_vectorize : Flag<["-"], "fno-tree-vectorize">, Alias<fno_vectorize>;
+def fslp_vectorize : Flag<["-"], "fslp-vectorize">, Group<f_Group>,
+  HelpText<"Enable the superword-level parallelism vectorization passes">;
+def fno_slp_vectorize : Flag<["-"], "fno-slp-vectorize">, Group<f_Group>;
+def ftree_slp_vectorize : Flag<["-"], "ftree-slp-vectorize">, Alias<fslp_vectorize>;
+def fno_tree_slp_vectorize : Flag<["-"], "fno-tree-slp-vectorize">, Alias<fno_slp_vectorize>;
 def Wlarge_by_value_copy_def : Flag<["-"], "Wlarge-by-value-copy">,
   HelpText<"Warn if a function definition returns or accepts an object larger "
            "in bytes than a given value">, Flags<[HelpHidden]>;
@@ -672,11 +732,17 @@ def funsigned_bitfields : Flag<["-"], "funsigned-bitfields">, Group<f_Group>;
 def funsigned_char : Flag<["-"], "funsigned-char">, Group<f_Group>;
 def funwind_tables : Flag<["-"], "funwind-tables">, Group<f_Group>;
 def fuse_cxa_atexit : Flag<["-"], "fuse-cxa-atexit">, Group<f_Group>;
+def fuse_init_array : Flag<["-"], "fuse-init-array">, Group<f_Group>, Flags<[CC1Option]>,
+  HelpText<"Use .init_array instead of .ctors">;
 def fverbose_asm : Flag<["-"], "fverbose-asm">, Group<f_Group>;
-def fvisibility_EQ : Joined<["-"], "fvisibility=">, Group<f_Group>;
+def fvisibility_EQ : Joined<["-"], "fvisibility=">, Group<f_Group>,
+  HelpText<"Set the default symbol visibility for all global declarations">;
 def fvisibility_inlines_hidden : Flag<["-"], "fvisibility-inlines-hidden">, Group<f_Group>,
   HelpText<"Give inline C++ member functions default visibility by default">,
   Flags<[CC1Option]>;
+def fvisibility_ms_compat : Flag<["-"], "fvisibility-ms-compat">, Group<f_Group>,
+  HelpText<"Give global types 'default' visibility and global functions and "
+           "variables 'hidden' visibility by default">;
 def fwrapv : Flag<["-"], "fwrapv">, Group<f_Group>, Flags<[CC1Option]>,
   HelpText<"Treat signed integer overflow as two's complement">;
 def fwritable_strings : Flag<["-"], "fwritable-strings">, Group<f_Group>, Flags<[CC1Option]>,
@@ -716,6 +782,7 @@ def gno_record_gcc_switches : Flag<["-"], "gno-record-gcc-switches">,
 def gstrict_dwarf : Flag<["-"], "gstrict-dwarf">, Group<g_flags_Group>;
 def gno_strict_dwarf : Flag<["-"], "gno-strict-dwarf">, Group<g_flags_Group>;
 def gcolumn_info : Flag<["-"], "gcolumn-info">, Group<g_flags_Group>;
+def gsplit_dwarf : Flag<["-"], "gsplit-dwarf">, Group<g_flags_Group>;
 def headerpad__max__install__names : Joined<["-"], "headerpad_max_install_names">;
 def help : Flag<["-", "--"], "help">, Flags<[CC1Option]>,
   HelpText<"Display available options">;
@@ -757,6 +824,8 @@ def keep__private__externs : Flag<["-"], "keep_private_externs">;
 def l : JoinedOrSeparate<["-"], "l">, Flags<[LinkerInput, RenderJoined]>;
 def lazy__framework : Separate<["-"], "lazy_framework">, Flags<[LinkerInput]>;
 def lazy__library : Separate<["-"], "lazy_library">, Flags<[LinkerInput]>;
+def EL : Flag<["-"], "EL">, Flags<[DriverOption]>;
+def EB : Flag<["-"], "EB">, Flags<[DriverOption]>;
 def m32 : Flag<["-"], "m32">, Group<m_Group>, Flags<[DriverOption]>;
 def mqdsp6_compat : Flag<["-"], "mqdsp6-compat">, Group<m_Group>, Flags<[DriverOption,CC1Option]>,
   HelpText<"Enable hexagon-qdsp6 backward compatibility">;
@@ -766,6 +835,15 @@ def m64 : Flag<["-"], "m64">, Group<m_Group>, Flags<[DriverOption]>;
 def mabi_EQ : Joined<["-"], "mabi=">, Group<m_Group>;
 def march_EQ : Joined<["-"], "march=">, Group<m_Group>;
 def maltivec : Flag<["-"], "maltivec">, Alias<faltivec>;
+def mno_altivec : Flag<["-"], "mno-altivec">, Alias<fno_altivec>;
+def mfprnd : Flag<["-"], "mfprnd">, Group<m_Group>;
+def mno_fprnd : Flag<["-"], "mno-fprnd">, Group<m_Group>;
+def mmfcrf : Flag<["-"], "mmfcrf">, Group<m_Group>;
+def mno_mfcrf : Flag<["-"], "mno-mfcrf">, Group<m_Group>;
+def mpopcntd : Flag<["-"], "mpopcntd">, Group<m_Group>;
+def mno_popcntd : Flag<["-"], "mno-popcntd">, Group<m_Group>;
+def mqpx : Flag<["-"], "mqpx">, Group<m_Group>;
+def mno_qpx : Flag<["-"], "mno-qpx">, Group<m_Group>;
 def mcmodel_EQ : Joined<["-"], "mcmodel=">, Group<m_Group>;
 def mconstant_cfstrings : Flag<["-"], "mconstant-cfstrings">, Group<clang_ignored_m_Group>;
 def mcpu_EQ : Joined<["-"], "mcpu=">, Group<m_Group>;
@@ -827,6 +905,8 @@ def mno_fma : Flag<["-"], "mno-fma">, Group<m_x86_Features_Group>;
 def mno_xop : Flag<["-"], "mno-xop">, Group<m_x86_Features_Group>;
 def mno_f16c : Flag<["-"], "mno-f16c">, Group<m_x86_Features_Group>;
 def mno_rtm : Flag<["-"], "mno-rtm">, Group<m_x86_Features_Group>;
+def mno_prfchw : Flag<["-"], "mno-prfchw">, Group<m_x86_Features_Group>;
+def mno_rdseed : Flag<["-"], "mno-rdseed">, Group<m_x86_Features_Group>;
 
 def mno_thumb : Flag<["-"], "mno-thumb">, Group<m_Group>;
 def marm : Flag<["-"], "marm">, Alias<mno_thumb>;
@@ -835,6 +915,7 @@ def mno_warn_nonportable_cfstrings : Flag<["-"], "mno-warn-nonportable-cfstrings
 def mno_omit_leaf_frame_pointer : Flag<["-"], "mno-omit-leaf-frame-pointer">, Group<m_Group>;
 def momit_leaf_frame_pointer : Flag<["-"], "momit-leaf-frame-pointer">, Group<m_Group>,
   HelpText<"Omit frame pointer setup for leaf functions">, Flags<[CC1Option]>;
+def moslib_EQ : Joined<["-"], "moslib=">, Group<m_Group>;
 def mpascal_strings : Flag<["-"], "mpascal-strings">, Group<m_Group>;
 def mred_zone : Flag<["-"], "mred-zone">, Group<m_Group>;
 def mregparm_EQ : Joined<["-"], "mregparm=">, Group<m_Group>;
@@ -869,8 +950,12 @@ def mfma : Flag<["-"], "mfma">, Group<m_x86_Features_Group>;
 def mxop : Flag<["-"], "mxop">, Group<m_x86_Features_Group>;
 def mf16c : Flag<["-"], "mf16c">, Group<m_x86_Features_Group>;
 def mrtm : Flag<["-"], "mrtm">, Group<m_x86_Features_Group>;
+def mprfchw : Flag<["-"], "mprfchw">, Group<m_x86_Features_Group>;
+def mrdseed : Flag<["-"], "mrdseed">, Group<m_x86_Features_Group>;
 def mips16 : Flag<["-"], "mips16">, Group<m_Group>;
 def mno_mips16 : Flag<["-"], "mno-mips16">, Group<m_Group>;
+def mxgot : Flag<["-"], "mxgot">, Group<m_Group>;
+def mno_xgot : Flag<["-"], "mno-xgot">, Group<m_Group>;
 def mdsp : Flag<["-"], "mdsp">, Group<m_Group>;
 def mno_dsp : Flag<["-"], "mno-dsp">, Group<m_Group>;
 def mdspr2 : Flag<["-"], "mdspr2">, Group<m_Group>;
@@ -883,6 +968,7 @@ def mips64 : Flag<["-"], "mips64">, Group<mips_CPUs_Group>,
   HelpText<"Equivalent to -march=mips64">, Flags<[HelpHidden]>;
 def mips64r2 : Flag<["-"], "mips64r2">, Group<mips_CPUs_Group>,
   HelpText<"Equivalent to -march=mips64r2">, Flags<[HelpHidden]>;
+def module_file_info : Flag<["-"], "module-file-info">, Flags<[DriverOption,CC1Option]>, Group<Action_Group>;
 def mthumb : Flag<["-"], "mthumb">, Group<m_Group>;
 def mtune_EQ : Joined<["-"], "mtune=">, Group<m_Group>;
 def multi__module : Flag<["-"], "multi_module">;
@@ -951,6 +1037,11 @@ def rewrite_objc : Flag<["-"], "rewrite-objc">, Flags<[DriverOption,CC1Option]>,
 def rewrite_legacy_objc : Flag<["-"], "rewrite-legacy-objc">, Flags<[DriverOption]>,
   HelpText<"Rewrite Legacy Objective-C source to C++">;
 def rdynamic : Flag<["-"], "rdynamic">;
+def resource_dir : Separate<["-"], "resource-dir">,
+  Flags<[DriverOption, CC1Option, HelpHidden]>,
+  HelpText<"The directory which holds the compiler resource files">;
+def resource_dir_EQ : Joined<["-"], "resource-dir=">, Flags<[DriverOption]>,
+  Alias<resource_dir>;
 def rpath : Separate<["-"], "rpath">, Flags<[LinkerInput]>;
 def rtlib_EQ : Joined<["-", "--"], "rtlib=">;
 def r : Flag<["-"], "r">;
@@ -1100,7 +1191,7 @@ def _output_class_directory_EQ : Joined<["--"], "output-class-directory=">, Alia
 def _output_class_directory : Separate<["--"], "output-class-directory">, Alias<foutput_class_dir_EQ>;
 def _output_EQ : Joined<["--"], "output=">, Alias<o>;
 def _output : Separate<["--"], "output">, Alias<o>;
-def _param : Separate<["--"], "param">;
+def _param : Separate<["--"], "param">, Group<CompileOnly_Group>;
 def _param_EQ : Joined<["--"], "param=">, Alias<_param>;
 def _prefix_EQ : Joined<["--"], "prefix=">, Alias<B>;
 def _prefix : Separate<["--"], "prefix">, Alias<B>;
diff --git a/include/clang/Driver/Phases.h b/include/clang/Driver/Phases.h
index a0c42ea..4e0f40c 100644
--- a/include/clang/Driver/Phases.h
+++ b/include/clang/Driver/Phases.h
@@ -23,6 +23,10 @@ namespace phases {
     Link
   };
 
+  enum {
+    MaxNumberOfPhases = Link + 1
+  };
+
   const char *getPhaseName(ID Id);
 
 } // end namespace phases
diff --git a/include/clang/Driver/Tool.h b/include/clang/Driver/Tool.h
index c62e756..4c05d0a 100644
--- a/include/clang/Driver/Tool.h
+++ b/include/clang/Driver/Tool.h
@@ -50,6 +50,7 @@ public:
   virtual bool hasIntegratedAssembler() const { return false; }
   virtual bool hasIntegratedCPP() const = 0;
   virtual bool isLinkJob() const { return false; }
+  virtual bool isDsymutilJob() const { return false; }
 
   /// \brief Does this tool have "good" standardized diagnostics, or should the
   /// driver add an additional "command failed" diagnostic on failures.
diff --git a/include/clang/Driver/ToolChain.h b/include/clang/Driver/ToolChain.h
index 509e08d..ae9e397 100644
--- a/include/clang/Driver/ToolChain.h
+++ b/include/clang/Driver/ToolChain.h
@@ -10,8 +10,10 @@
 #ifndef CLANG_DRIVER_TOOLCHAIN_H_
 #define CLANG_DRIVER_TOOLCHAIN_H_
 
-#include "clang/Driver/Util.h"
+#include "clang/Driver/Action.h"
 #include "clang/Driver/Types.h"
+#include "clang/Driver/Util.h"
+#include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/Triple.h"
 #include "llvm/Support/Path.h"
@@ -47,6 +49,7 @@ public:
 private:
   const Driver &D;
   const llvm::Triple Triple;
+  const ArgList &Args;
 
   /// The list of toolchain specific path prefixes to search for
   /// files.
@@ -56,8 +59,20 @@ private:
   /// programs.
   path_list ProgramPaths;
 
+  mutable OwningPtr<Tool> Clang;
+  mutable OwningPtr<Tool> Assemble;
+  mutable OwningPtr<Tool> Link;
+  Tool *getClang() const;
+  Tool *getAssemble() const;
+  Tool *getLink() const;
+  Tool *getClangAs() const;
+
 protected:
-  ToolChain(const Driver &D, const llvm::Triple &T);
+  ToolChain(const Driver &D, const llvm::Triple &T, const ArgList &Args);
+
+  virtual Tool *buildAssembler() const;
+  virtual Tool *buildLinker() const;
+  virtual Tool *getTool(Action::ActionClass AC) const;
 
   /// \name Utilities for implementing subclasses.
   ///@{
@@ -111,10 +126,8 @@ public:
     return 0;
   }
 
-  /// SelectTool - Choose a tool to use to handle the action \p JA with the
-  /// given \p Inputs.
-  virtual Tool &SelectTool(const Compilation &C, const JobAction &JA,
-                           const ActionList &Inputs) const = 0;
+  /// Choose a tool to use to handle the action \p JA.
+  Tool *SelectTool(const JobAction &JA) const;
 
   // Helper methods
 
@@ -138,6 +151,9 @@ public:
   /// by default.
   virtual bool IsIntegratedAssemblerDefault() const { return false; }
 
+  /// \brief Check if the toolchain should use the integrated assembler.
+  bool useIntegratedAs() const;
+
   /// IsStrictAliasingDefault - Does this tool chain use -fstrict-aliasing by
   /// default.
   virtual bool IsStrictAliasingDefault() const { return true; }
@@ -147,7 +163,7 @@ public:
 
   /// IsObjCDefaultSynthPropertiesDefault - Does this tool chain enable
   /// -fobjc-default-synthesize-properties by default.
-  virtual bool IsObjCDefaultSynthPropertiesDefault() const { return false; }
+  virtual bool IsObjCDefaultSynthPropertiesDefault() const { return true; }
   
   /// IsEncodeExtendedBlockSignatureDefault - Does this tool chain enable
   /// -fencode-extended-block-signature by default.
@@ -233,9 +249,9 @@ public:
   virtual void AddClangSystemIncludeArgs(const ArgList &DriverArgs,
                                          ArgStringList &CC1Args) const;
 
-  // addClangTargetOptions - Add options that need to be passed to cc1 for
-  // this target.
-  virtual void addClangTargetOptions(ArgStringList &CC1Args) const;
+  /// \brief Add options that need to be passed to cc1 for this target.
+  virtual void addClangTargetOptions(const ArgList &DriverArgs,
+                                     ArgStringList &CC1Args) const;
 
   // GetRuntimeLibType - Determine the runtime library type to use with the
   // given compilation arguments.
diff --git a/include/clang/Driver/Types.def b/include/clang/Driver/Types.def
index 318c55a..42f0709 100644
--- a/include/clang/Driver/Types.def
+++ b/include/clang/Driver/Types.def
@@ -30,7 +30,7 @@
 // The fourth value is the suffix to use when creating temporary files
 // of this type, or null if unspecified.
 
-// The fifth value is a string containt option flags. Valid values:
+// The fifth value is a string containing option flags. Valid values:
 //  a - The type should only be assembled.
 //  p - The type should only be precompiled.
 //  u - The type can be user specified (with -x).
@@ -80,6 +80,7 @@ TYPE("lto-bc",                   LTO_BC,       INVALID,         "o",     "")
 
 // Misc.
 TYPE("ast",                      AST,          INVALID,         "ast",   "u")
+TYPE("pcm",                      ModuleFile,   INVALID,         "pcm",   "u")
 TYPE("plist",                    Plist,        INVALID,         "plist", "")
 TYPE("rewritten-objc",           RewrittenObjC,INVALID,         "cpp",   "")
 TYPE("rewritten-legacy-objc",    RewrittenLegacyObjC,INVALID,   "cpp",   "")
diff --git a/include/clang/Driver/Types.h b/include/clang/Driver/Types.h
index d28ca88..18cd2d5 100644
--- a/include/clang/Driver/Types.h
+++ b/include/clang/Driver/Types.h
@@ -11,6 +11,7 @@
 #define CLANG_DRIVER_TYPES_H_
 
 #include "clang/Driver/Phases.h"
+#include "llvm/ADT/SmallVector.h"
 
 namespace clang {
 namespace driver {
@@ -73,14 +74,12 @@ namespace types {
   /// specified type name.
   ID lookupTypeForTypeSpecifier(const char *Name);
 
-  /// getNumCompilationPhases - Return the complete number of phases
-  /// to be done for this type.
-  unsigned getNumCompilationPhases(ID Id);
+  /// getCompilationPhases - Get the list of compilation phases ('Phases') to be
+  /// done for type 'Id'.
+  void getCompilationPhases(
+    ID Id,
+    llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases> &Phases);
 
-  /// getCompilationPhase - Return the \p N th compilation phase to
-  /// be done for this type.
-  phases::ID getCompilationPhase(ID Id, unsigned N);
-  
   /// lookupCXXTypeForCType - Lookup CXX input type that corresponds to given
   /// C type (used for clang++ emulation of g++ behaviour)
   ID lookupCXXTypeForCType(ID Id);
diff --git a/include/clang/Driver/Util.h b/include/clang/Driver/Util.h
index 65aef4b..06b82b9 100644
--- a/include/clang/Driver/Util.h
+++ b/include/clang/Driver/Util.h
@@ -11,14 +11,19 @@
 #define CLANG_DRIVER_UTIL_H_
 
 #include "clang/Basic/LLVM.h"
+#include "llvm/ADT/DenseMap.h"
 
 namespace clang {
 namespace driver {
   class Action;
+  class JobAction;
 
   /// ArgStringList - Type used for constructing argv lists for subprocesses.
   typedef SmallVector<const char*, 16> ArgStringList;
 
+  /// ArgStringMap - Type used to map a JobAction to its result file.
+  typedef llvm::DenseMap<const JobAction*, const char*> ArgStringMap;
+
   /// ActionList - Type used for lists of actions.
   typedef SmallVector<Action*, 3> ActionList;
 
diff --git a/include/clang/Edit/Commit.h b/include/clang/Edit/Commit.h
index aaf6b18..48e3d59 100644
--- a/include/clang/Edit/Commit.h
+++ b/include/clang/Edit/Commit.h
@@ -11,12 +11,12 @@
 #define LLVM_CLANG_EDIT_COMMIT_H
 
 #include "clang/Edit/FileOffset.h"
-#include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
 
 namespace clang {
   class LangOptions;
-  class PreprocessingRecord;
+  class PPConditionalDirectiveRecord;
 
 namespace edit {
   class EditedSource;
@@ -46,7 +46,7 @@ public:
 private:
   const SourceManager &SourceMgr;
   const LangOptions &LangOpts;
-  const PreprocessingRecord *PPRec;
+  const PPConditionalDirectiveRecord *PPRec;
   EditedSource *Editor;
 
   bool IsCommitable;
@@ -55,7 +55,7 @@ private:
 public:
   explicit Commit(EditedSource &Editor);
   Commit(const SourceManager &SM, const LangOptions &LangOpts,
-         const PreprocessingRecord *PPRec = 0)
+         const PPConditionalDirectiveRecord *PPRec = 0)
     : SourceMgr(SM), LangOpts(LangOpts), PPRec(PPRec), Editor(0),
       IsCommitable(true) { }
 
diff --git a/include/clang/Edit/EditedSource.h b/include/clang/Edit/EditedSource.h
index c685753..733ad40 100644
--- a/include/clang/Edit/EditedSource.h
+++ b/include/clang/Edit/EditedSource.h
@@ -11,14 +11,14 @@
 #define LLVM_CLANG_EDIT_EDITEDSOURCE_H
 
 #include "clang/Edit/FileOffset.h"
-#include "llvm/Support/Allocator.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/StringRef.h"
+#include "llvm/Support/Allocator.h"
 #include <map>
 
 namespace clang {
   class LangOptions;
-  class PreprocessingRecord;
+  class PPConditionalDirectiveRecord;
 
 namespace edit {
   class Commit;
@@ -27,7 +27,7 @@ namespace edit {
 class EditedSource {
   const SourceManager &SourceMgr;
   const LangOptions &LangOpts;
-  const PreprocessingRecord *PPRec;
+  const PPConditionalDirectiveRecord *PPRec;
 
   struct FileEdit {
     StringRef Text;
@@ -45,13 +45,15 @@ class EditedSource {
 
 public:
   EditedSource(const SourceManager &SM, const LangOptions &LangOpts,
-               const PreprocessingRecord *PPRec = 0)
+               const PPConditionalDirectiveRecord *PPRec = 0)
     : SourceMgr(SM), LangOpts(LangOpts), PPRec(PPRec),
       StrAlloc(/*size=*/512) { }
 
   const SourceManager &getSourceManager() const { return SourceMgr; }
   const LangOptions &getLangOpts() const { return LangOpts; }
-  const PreprocessingRecord *getPreprocessingRecord() const { return PPRec; }
+  const PPConditionalDirectiveRecord *getPPCondDirectiveRecord() const {
+    return PPRec;
+  }
 
   bool canInsertInOffset(SourceLocation OrigLoc, FileOffset Offs);
 
diff --git a/include/clang/Edit/Rewriters.h b/include/clang/Edit/Rewriters.h
index aa7a5b2..292878e 100644
--- a/include/clang/Edit/Rewriters.h
+++ b/include/clang/Edit/Rewriters.h
@@ -13,6 +13,7 @@
 namespace clang {
   class ObjCMessageExpr;
   class NSAPI;
+  class ParentMap;
 
 namespace edit {
   class Commit;
@@ -21,7 +22,8 @@ bool rewriteObjCRedundantCallWithLiteral(const ObjCMessageExpr *Msg,
                                          const NSAPI &NS, Commit &commit);
 
 bool rewriteToObjCLiteralSyntax(const ObjCMessageExpr *Msg,
-                                const NSAPI &NS, Commit &commit);
+                                const NSAPI &NS, Commit &commit,
+                                const ParentMap *PMap);
 
 bool rewriteToObjCSubscriptSyntax(const ObjCMessageExpr *Msg,
                                   const NSAPI &NS, Commit &commit);
diff --git a/include/clang/Format/Format.h b/include/clang/Format/Format.h
new file mode 100644
index 0000000..d6cc114e
--- /dev/null
+++ b/include/clang/Format/Format.h
@@ -0,0 +1,131 @@
+//===--- Format.h - Format C++ code -----------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// Various functions to configurably format source code.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_FORMAT_FORMAT_H
+#define LLVM_CLANG_FORMAT_FORMAT_H
+
+#include "clang/Frontend/FrontendAction.h"
+#include "clang/Tooling/Refactoring.h"
+
+namespace clang {
+
+class Lexer;
+class SourceManager;
+class DiagnosticConsumer;
+
+namespace format {
+
+/// \brief The \c FormatStyle is used to configure the formatting to follow
+/// specific guidelines.
+struct FormatStyle {
+  /// \brief The column limit.
+  unsigned ColumnLimit;
+
+  /// \brief The penalty for each character outside of the column limit.
+  unsigned PenaltyExcessCharacter;
+
+  /// \brief The maximum number of consecutive empty lines to keep.
+  unsigned MaxEmptyLinesToKeep;
+
+  /// \brief Set whether & and * bind to the type as opposed to the variable.
+  bool PointerBindsToType;
+
+  /// \brief If \c true, analyze the formatted file for the most common binding.
+  bool DerivePointerBinding;
+
+  /// \brief The extra indent or outdent of access modifiers (e.g.: public:).
+  int AccessModifierOffset;
+
+  enum LanguageStandard {
+    LS_Cpp03,
+    LS_Cpp11,
+    LS_Auto
+  };
+
+  /// \brief Format compatible with this standard, e.g. use \c A<A<int> >
+  /// instead of \c A<A<int>> for LS_Cpp03.
+  LanguageStandard Standard;
+
+  /// \brief If \c true, analyze the formatted file for C++03 compatibility.
+  bool DeriveBackwardsCompatibility;
+
+  /// \brief Indent case labels one level from the switch statement.
+  ///
+  /// When false, use the same indentation level as for the switch statement.
+  /// Switch statement body is always indented one level more than case labels.
+  bool IndentCaseLabels;
+
+  /// \brief The number of spaces to before trailing line comments.
+  unsigned SpacesBeforeTrailingComments;
+
+  /// \brief If false, a function call's or function definition's parameters
+  /// will either all be on the same line or will have one line each.
+  bool BinPackParameters;
+
+  /// \brief Allow putting all parameters of a function declaration onto
+  /// the next line even if \c BinPackParameters is \c false.
+  bool AllowAllParametersOfDeclarationOnNextLine;
+
+  /// \brief Penalty for putting the return type of a function onto its own
+  /// line.
+  unsigned PenaltyReturnTypeOnItsOwnLine;
+
+  /// \brief If the constructor initializers don't fit on a line, put each
+  /// initializer on its own line.
+  bool ConstructorInitializerAllOnOneLineOrOnePerLine;
+
+  /// \brief If true, "if (a) return;" can be put on a single line.
+  bool AllowShortIfStatementsOnASingleLine;
+
+  /// \brief Add a space in front of an Objective-C protocol list, i.e. use
+  /// Foo <Protocol> instead of Foo<Protocol>.
+  bool ObjCSpaceBeforeProtocolList;
+};
+
+/// \brief Returns a format style complying with the LLVM coding standards:
+/// http://llvm.org/docs/CodingStandards.html.
+FormatStyle getLLVMStyle();
+
+/// \brief Returns a format style complying with Google's C++ style guide:
+/// http://google-styleguide.googlecode.com/svn/trunk/cppguide.xml.
+FormatStyle getGoogleStyle();
+
+/// \brief Returns a format style complying with Chromium's style guide:
+/// http://www.chromium.org/developers/coding-style.
+FormatStyle getChromiumStyle();
+
+/// \brief Reformats the given \p Ranges in the token stream coming out of
+/// \c Lex.
+///
+/// Each range is extended on either end to its next bigger logic unit, i.e.
+/// everything that might influence its formatting or might be influenced by its
+/// formatting.
+///
+/// \param DiagClient A custom DiagnosticConsumer. Can be 0, in this case
+/// diagnostic is output to llvm::errs().
+///
+/// Returns the \c Replacements necessary to make all \p Ranges comply with
+/// \p Style.
+tooling::Replacements reformat(const FormatStyle &Style, Lexer &Lex,
+                               SourceManager &SourceMgr,
+                               std::vector<CharSourceRange> Ranges,
+                               DiagnosticConsumer *DiagClient = 0);
+
+/// \brief Returns the \c LangOpts that the formatter expects you to set.
+LangOptions getFormattingLangOpts();
+
+} // end namespace format
+} // end namespace clang
+
+#endif // LLVM_CLANG_FORMAT_FORMAT_H
diff --git a/include/clang/Frontend/ASTUnit.h b/include/clang/Frontend/ASTUnit.h
index 5e409bd..02c57d7 100644
--- a/include/clang/Frontend/ASTUnit.h
+++ b/include/clang/Frontend/ASTUnit.h
@@ -14,30 +14,30 @@
 #ifndef LLVM_CLANG_FRONTEND_ASTUNIT_H
 #define LLVM_CLANG_FRONTEND_ASTUNIT_H
 
-#include "clang/Serialization/ASTBitCodes.h"
-#include "clang/Sema/Sema.h"
-#include "clang/Sema/CodeCompleteConsumer.h"
-#include "clang/Lex/ModuleLoader.h"
-#include "clang/Lex/PreprocessingRecord.h"
-#include "clang/Lex/HeaderSearchOptions.h"
+#include "clang-c/Index.h"
 #include "clang/AST/ASTContext.h"
-#include "clang/Basic/LangOptions.h"
-#include "clang/Basic/SourceManager.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/FileSystemOptions.h"
+#include "clang/Basic/LangOptions.h"
+#include "clang/Basic/SourceManager.h"
 #include "clang/Basic/TargetOptions.h"
-#include "clang-c/Index.h"
+#include "clang/Lex/HeaderSearchOptions.h"
+#include "clang/Lex/ModuleLoader.h"
+#include "clang/Lex/PreprocessingRecord.h"
+#include "clang/Sema/CodeCompleteConsumer.h"
+#include "clang/Sema/Sema.h"
+#include "clang/Serialization/ASTBitCodes.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/Support/Path.h"
+#include <cassert>
 #include <map>
 #include <string>
-#include <vector>
-#include <cassert>
-#include <utility>
 #include <sys/types.h>
+#include <utility>
+#include <vector>
 
 namespace llvm {
   class MemoryBuffer;
@@ -485,6 +485,9 @@ public:
 
   StringRef getMainFileName() const;
 
+  /// \brief If this ASTUnit came from an AST file, returns the filename for it.
+  StringRef getASTFileName() const;
+
   typedef std::vector<Decl *>::iterator top_level_iterator;
 
   top_level_iterator top_level_begin() {
@@ -830,12 +833,19 @@ public:
   /// \returns True if an error occurred, false otherwise.
   bool serialize(raw_ostream &OS);
   
-  virtual Module *loadModule(SourceLocation ImportLoc, ModuleIdPath Path,
-                             Module::NameVisibilityKind Visibility,
-                             bool IsInclusionDirective) {
+  virtual ModuleLoadResult loadModule(SourceLocation ImportLoc,
+                                      ModuleIdPath Path,
+                                      Module::NameVisibilityKind Visibility,
+                                      bool IsInclusionDirective) {
     // ASTUnit doesn't know how to load modules (not that this matters).
-    return 0;
+    return ModuleLoadResult();
   }
+
+  virtual void makeModuleVisible(Module *Mod,
+                                 Module::NameVisibilityKind Visibility,
+                                 SourceLocation ImportLoc,
+                                 bool Complain) { }
+
 };
 
 } // namespace clang
diff --git a/include/clang/Frontend/ChainedIncludesSource.h b/include/clang/Frontend/ChainedIncludesSource.h
index d7119e9..e14580e 100644
--- a/include/clang/Frontend/ChainedIncludesSource.h
+++ b/include/clang/Frontend/ChainedIncludesSource.h
@@ -44,8 +44,8 @@ protected:
   virtual uint32_t GetNumExternalSelectors();
   virtual Stmt *GetExternalDeclStmt(uint64_t Offset);
   virtual CXXBaseSpecifier *GetExternalCXXBaseSpecifiers(uint64_t Offset);
-  virtual DeclContextLookupResult
-  FindExternalVisibleDeclsByName(const DeclContext *DC, DeclarationName Name);
+  virtual bool FindExternalVisibleDeclsByName(const DeclContext *DC,
+                                              DeclarationName Name);
   virtual ExternalLoadResult FindExternalLexicalDecls(const DeclContext *DC,
                                         bool (*isKindWeWant)(Decl::Kind),
                                         SmallVectorImpl<Decl*> &Result);
diff --git a/include/clang/Frontend/CodeGenOptions.def b/include/clang/Frontend/CodeGenOptions.def
index 558e6f1..1c0b9fa 100644
--- a/include/clang/Frontend/CodeGenOptions.def
+++ b/include/clang/Frontend/CodeGenOptions.def
@@ -30,6 +30,8 @@ CODEGENOPT(Name, Bits, Default)
 
 CODEGENOPT(AsmVerbose        , 1, 0) ///< -dA, -fverbose-asm.
 CODEGENOPT(ObjCAutoRefCountExceptions , 1, 0) ///< Whether ARC should be EH-safe.
+CODEGENOPT(CoverageExtraChecksum, 1, 0) ///< Whether we need a second checksum for functions in GCNO files.
+CODEGENOPT(CoverageNoFunctionNamesInData, 1, 0) ///< Do not include function names in GCDA files.
 CODEGENOPT(CUDAIsDevice      , 1, 0) ///< Set when compiling for CUDA device.
 CODEGENOPT(CXAAtExit         , 1, 1) ///< Use __cxa_atexit for calling destructors.
 CODEGENOPT(CXXCtorDtorAliases, 1, 0) ///< Emit complete ctors/dtors as linker
@@ -40,6 +42,7 @@ CODEGENOPT(DisableLLVMOpts   , 1, 0) ///< Don't run any optimizations, for use i
                                      ///< getting .bc files that correspond to the
                                      ///< internal state before optimizations are
                                      ///< done.
+CODEGENOPT(DisableGCov       , 1, 0) ///< Don't run the GCov pass, for testing.
 CODEGENOPT(DisableRedZone    , 1, 0) ///< Set when -mno-red-zone is enabled.
 CODEGENOPT(DisableTailCalls  , 1, 0) ///< Do not emit tail calls.
 CODEGENOPT(EmitDeclMetadata  , 1, 0) ///< Emit special metadata indicating what
@@ -49,6 +52,8 @@ CODEGENOPT(EmitDeclMetadata  , 1, 0) ///< Emit special metadata indicating what
 CODEGENOPT(EmitGcovArcs      , 1, 0) ///< Emit coverage data files, aka. GCDA.
 CODEGENOPT(EmitGcovNotes     , 1, 0) ///< Emit coverage "notes" files, aka GCNO.
 CODEGENOPT(EmitOpenCLArgMetadata , 1, 0) ///< Emit OpenCL kernel arg metadata.
+/// \brief FP_CONTRACT mode (on/off/fast).
+ENUM_CODEGENOPT(FPContractMode, FPContractModeKind, 2, FPC_On)
 CODEGENOPT(ForbidGuardVariables , 1, 0) ///< Issue errors if C++ guard variables
                                         ///< are required.
 CODEGENOPT(FunctionSections  , 1, 0) ///< Set when -ffunction-sections is enabled.
@@ -65,6 +70,7 @@ CODEGENOPT(NoDwarf2CFIAsm    , 1, 0) ///< Set when -fno-dwarf2-cfi-asm is enable
 CODEGENOPT(NoDwarfDirectoryAsm , 1, 0) ///< Set when -fno-dwarf-directory-asm is
                                        ///< enabled.
 CODEGENOPT(NoExecStack       , 1, 0) ///< Set when -Wa,--noexecstack is enabled.
+CODEGENOPT(EnableSegmentedStacks , 1, 0) ///< Set when -fsplit-stack is enabled.
 CODEGENOPT(NoGlobalMerge     , 1, 0) ///< Set when -mno-global-merge is enabled.
 CODEGENOPT(NoImplicitFloat   , 1, 0) ///< Set when -mno-implicit-float is enabled.
 CODEGENOPT(NoInfsFPMath      , 1, 0) ///< Assume FP arguments, results not +-Inf.
@@ -80,7 +86,14 @@ VALUE_CODEGENOPT(OptimizationLevel, 3, 0) ///< The -O[0-4] option specified.
 VALUE_CODEGENOPT(OptimizeSize, 2, 0) ///< If -Os (==1) or -Oz (==2) is specified.
 CODEGENOPT(RelaxAll          , 1, 0) ///< Relax all machine code instructions.
 CODEGENOPT(RelaxedAliasing   , 1, 0) ///< Set when -fno-strict-aliasing is enabled.
+CODEGENOPT(StructPathTBAA    , 1, 0) ///< Whether or not to use struct-path TBAA.
 CODEGENOPT(SaveTempLabels    , 1, 0) ///< Save temporary labels.
+CODEGENOPT(SanitizeAddressZeroBaseShadow , 1, 0) ///< Map shadow memory at zero
+                                                 ///< offset in AddressSanitizer.
+CODEGENOPT(SanitizeMemoryTrackOrigins, 1, 0) ///< Enable tracking origins in
+                                             ///< MemorySanitizer
+CODEGENOPT(SanitizeUndefinedTrapOnError, 1, 0) ///< Set on
+                                               /// -fsanitize-undefined-trap-on-error
 CODEGENOPT(SimplifyLibCalls  , 1, 1) ///< Set when -fbuiltin is enabled.
 CODEGENOPT(SoftFloat         , 1, 0) ///< -soft-float.
 CODEGENOPT(StrictEnums       , 1, 0) ///< Optimize based on strict enum definition.
@@ -107,13 +120,12 @@ VALUE_CODEGENOPT(StackAlignment    , 32, 0) ///< Overrides default stack
 CODEGENOPT(DebugColumnInfo, 1, 0) ///< Whether or not to use column information
                                   ///< in debug info.
 
+CODEGENOPT(ModulesAutolink, 1, 0) ///< Whether to auto-link imported modules
+
 /// The user specified number of registers to be used for integral arguments,
 /// or 0 if unspecified.
 VALUE_CODEGENOPT(NumRegisterParameters, 32, 0)
 
-/// The run-time penalty for bounds checking, or 0 to disable.
-VALUE_CODEGENOPT(BoundsChecking, 8, 0)
-
 /// The lower bound for a buffer to be considered for stack protection.
 VALUE_CODEGENOPT(SSPBufferSize, 32, 0)
 
@@ -126,6 +138,9 @@ ENUM_CODEGENOPT(Inlining, InliningMethod, 2, NoInlining)
 /// The default TLS model to use.
 ENUM_CODEGENOPT(DefaultTLSModel, TLSModel, 2, GeneralDynamicTLSModel)
 
+CODEGENOPT(SanitizeRecover, 1, 1) ///< Attempt to recover from sanitizer checks
+                                  ///< by continuing execution when possible
+
 #undef CODEGENOPT
 #undef ENUM_CODEGENOPT
 #undef VALUE_CODEGENOPT
diff --git a/include/clang/Frontend/CodeGenOptions.h b/include/clang/Frontend/CodeGenOptions.h
index 3567187..d0bbf30 100644
--- a/include/clang/Frontend/CodeGenOptions.h
+++ b/include/clang/Frontend/CodeGenOptions.h
@@ -65,6 +65,12 @@ public:
     LocalExecTLSModel
   };
 
+  enum FPContractModeKind {
+    FPC_Off,        // Form fused FP ops only where result will not be affected.
+    FPC_On,         // Form fused FP ops according to FP_CONTRACT rules.
+    FPC_Fast        // Aggressively fuse FP ops (E.g. FMA).
+  };
+
   /// The code model to use (-mcmodel).
   std::string CodeModel;
 
@@ -72,6 +78,9 @@ public:
   /// replaced.
   std::string CoverageFile;
 
+  /// The version string to put into coverage files.
+  char CoverageVersion[4];
+
   /// Enable additional debugging information.
   std::string DebugPass;
 
@@ -96,9 +105,16 @@ public:
   /// file, for example with -save-temps.
   std::string MainFileName;
 
+  /// The name for the split debug info file that we'll break out. This is used
+  /// in the backend for setting the name in the skeleton cu.
+  std::string SplitDwarfFile;
+
   /// The name of the relocation model to use.
   std::string RelocationModel;
 
+  /// Path to blacklist file for sanitizers.
+  std::string SanitizerBlacklistFile;
+
   /// If not an empty string, trap intrinsics are lowered to calls to this
   /// function instead of to trap instructions.
   std::string TrapFuncName;
@@ -121,6 +137,7 @@ public:
 #include "clang/Frontend/CodeGenOptions.def"
 
     RelocationModel = "pic";
+    memcpy(CoverageVersion, "*204", 4);
   }
 };
 
diff --git a/include/clang/Frontend/CompilerInstance.h b/include/clang/Frontend/CompilerInstance.h
index 2f3dc3f..0d67462 100644
--- a/include/clang/Frontend/CompilerInstance.h
+++ b/include/clang/Frontend/CompilerInstance.h
@@ -10,15 +10,15 @@
 #ifndef LLVM_CLANG_FRONTEND_COMPILERINSTANCE_H_
 #define LLVM_CLANG_FRONTEND_COMPILERINSTANCE_H_
 
-#include "clang/Frontend/CompilerInvocation.h"
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/SourceManager.h"
+#include "clang/Frontend/CompilerInvocation.h"
 #include "clang/Lex/ModuleLoader.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
-#include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/StringRef.h"
 #include <cassert>
 #include <list>
 #include <string>
@@ -94,7 +94,7 @@ class CompilerInstance : public ModuleLoader {
 
   /// \brief The semantic analysis object.
   OwningPtr<Sema> TheSema;
-  
+
   /// \brief The frontend timer
   OwningPtr<llvm::Timer> FrontendTimer;
 
@@ -111,8 +111,15 @@ class CompilerInstance : public ModuleLoader {
   
   /// \brief The result of the last module import.
   ///
-  Module *LastModuleImportResult;
-  
+  ModuleLoadResult LastModuleImportResult;
+
+  /// \brief Whether we should (re)build the global module index once we
+  /// have finished with this translation unit.
+  bool BuildGlobalModuleIndex;
+
+  /// \brief One or more modules failed to build.
+  bool ModuleBuildFailed;
+
   /// \brief Holds information about the output file.
   ///
   /// If TempFilename is not empty we must rename it to Filename at the end.
@@ -186,6 +193,15 @@ public:
   /// setInvocation - Replace the current invocation.
   void setInvocation(CompilerInvocation *Value);
 
+  /// \brief Indicates whether we should (re)build the global module index.
+  bool shouldBuildGlobalModuleIndex() const;
+  
+  /// \brief Set the flag indicating whether we should (re)build the global
+  /// module index.
+  void setBuildGlobalModuleIndex(bool Build) {
+    BuildGlobalModuleIndex = Build;
+  }
+
   /// }
   /// @name Forwarding Methods
   /// {
@@ -479,17 +495,12 @@ public:
   ///
   /// \param ShouldCloneClient If Client is non-NULL, specifies whether that
   /// client should be cloned.
-  void createDiagnostics(int Argc, const char* const *Argv,
-                         DiagnosticConsumer *Client = 0,
+  void createDiagnostics(DiagnosticConsumer *Client = 0,
                          bool ShouldOwnClient = true,
                          bool ShouldCloneClient = true);
 
   /// Create a DiagnosticsEngine object with a the TextDiagnosticPrinter.
   ///
-  /// The \p Argc and \p Argv arguments are used only for logging purposes,
-  /// when the diagnostic options indicate that the compiler should output
-  /// logging information.
-  ///
   /// If no diagnostic client is provided, this creates a
   /// DiagnosticConsumer that is owned by the returned diagnostic
   /// object, if using directly the caller is responsible for
@@ -507,8 +518,7 @@ public:
   ///
   /// \return The new object on success, or null on failure.
   static IntrusiveRefCntPtr<DiagnosticsEngine>
-  createDiagnostics(DiagnosticOptions *Opts, int Argc,
-                    const char* const *Argv,
+  createDiagnostics(DiagnosticOptions *Opts,
                     DiagnosticConsumer *Client = 0,
                     bool ShouldOwnClient = true,
                     bool ShouldCloneClient = true,
@@ -542,7 +552,8 @@ public:
                              bool DisablePCHValidation,
                              bool AllowPCHWithCompilerErrors,
                              Preprocessor &PP, ASTContext &Context,
-                             void *DeserializationListener, bool Preamble);
+                             void *DeserializationListener, bool Preamble,
+                             bool UseGlobalModuleIndex);
 
   /// Create a code completion consumer using the invocation; note that this
   /// will cause the source manager to truncate the input source file at the
@@ -645,9 +656,16 @@ public:
 
   /// }
   
-  virtual Module *loadModule(SourceLocation ImportLoc, ModuleIdPath Path,
-                             Module::NameVisibilityKind Visibility,
-                             bool IsInclusionDirective);
+  virtual ModuleLoadResult loadModule(SourceLocation ImportLoc,
+                                      ModuleIdPath Path,
+                                      Module::NameVisibilityKind Visibility,
+                                      bool IsInclusionDirective);
+
+  virtual void makeModuleVisible(Module *Mod,
+                                 Module::NameVisibilityKind Visibility,
+                                 SourceLocation ImportLoc,
+                                 bool Complain);
+
 };
 
 } // end namespace clang
diff --git a/include/clang/Frontend/CompilerInvocation.h b/include/clang/Frontend/CompilerInvocation.h
index 1314956..fac05c5 100644
--- a/include/clang/Frontend/CompilerInvocation.h
+++ b/include/clang/Frontend/CompilerInvocation.h
@@ -10,22 +10,22 @@
 #ifndef LLVM_CLANG_FRONTEND_COMPILERINVOCATION_H_
 #define LLVM_CLANG_FRONTEND_COMPILERINVOCATION_H_
 
+#include "clang/Basic/DiagnosticOptions.h"
+#include "clang/Basic/FileSystemOptions.h"
 #include "clang/Basic/LangOptions.h"
 #include "clang/Basic/TargetOptions.h"
-#include "clang/Basic/FileSystemOptions.h"
-#include "clang/Basic/DiagnosticOptions.h"
-#include "clang/Lex/HeaderSearchOptions.h"
-#include "clang/Lex/PreprocessorOptions.h"
-#include "clang/StaticAnalyzer/Core/AnalyzerOptions.h"
-#include "clang/Frontend/MigratorOptions.h"
 #include "clang/Frontend/CodeGenOptions.h"
 #include "clang/Frontend/DependencyOutputOptions.h"
 #include "clang/Frontend/FrontendOptions.h"
 #include "clang/Frontend/LangStandard.h"
+#include "clang/Frontend/MigratorOptions.h"
 #include "clang/Frontend/PreprocessorOutputOptions.h"
+#include "clang/Lex/HeaderSearchOptions.h"
+#include "clang/Lex/PreprocessorOptions.h"
+#include "clang/StaticAnalyzer/Core/AnalyzerOptions.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
-#include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
 #include <string>
 #include <vector>
 
diff --git a/include/clang/Frontend/DiagnosticRenderer.h b/include/clang/Frontend/DiagnosticRenderer.h
index 086bb13..f3cd054 100644
--- a/include/clang/Frontend/DiagnosticRenderer.h
+++ b/include/clang/Frontend/DiagnosticRenderer.h
@@ -19,6 +19,7 @@
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/LLVM.h"
 #include "clang/Basic/SourceLocation.h"
+#include "llvm/ADT/Optional.h"
 #include "llvm/ADT/PointerUnion.h"
 
 namespace clang {
@@ -31,7 +32,8 @@ typedef llvm::PointerUnion<const Diagnostic *,
                            const StoredDiagnostic *> DiagOrStoredDiag;
   
 /// \brief Class to encapsulate the logic for formatting a diagnostic message.
-///  Actual "printing" logic is implemented by subclasses.
+///
+/// Actual "printing" logic is implemented by subclasses.
 ///
 /// This class provides an interface for building and emitting
 /// diagnostic, including all of the macro backtraces, caret diagnostics, FixIt
@@ -55,7 +57,7 @@ protected:
   
   /// \brief The location of the last include whose stack was printed if known.
   ///
-  /// Same restriction as \see LastLoc essentially, but tracking include stack
+  /// Same restriction as LastLoc essentially, but tracking include stack
   /// root locations rather than diagnostic locations.
   SourceLocation LastIncludeLoc;
   
@@ -92,7 +94,13 @@ protected:
   
   virtual void emitIncludeLocation(SourceLocation Loc, PresumedLoc PLoc,
                                    const SourceManager &SM) = 0;
-  
+  virtual void emitImportLocation(SourceLocation Loc, PresumedLoc PLoc,
+                                  StringRef ModuleName,
+                                  const SourceManager &SM) = 0;
+  virtual void emitBuildingModuleLocation(SourceLocation Loc, PresumedLoc PLoc,
+                                          StringRef ModuleName,
+                                          const SourceManager &SM) = 0;
+
   virtual void beginDiagnostic(DiagOrStoredDiag D,
                                DiagnosticsEngine::Level Level) {}
   virtual void endDiagnostic(DiagOrStoredDiag D,
@@ -100,16 +108,23 @@ protected:
 
   
 private:
-  void emitIncludeStack(SourceLocation Loc, DiagnosticsEngine::Level Level,
-                        const SourceManager &SM);
+  void emitIncludeStack(SourceLocation Loc, PresumedLoc PLoc,
+                        DiagnosticsEngine::Level Level, const SourceManager &SM);
   void emitIncludeStackRecursively(SourceLocation Loc, const SourceManager &SM);
-  void emitMacroExpansionsAndCarets(SourceLocation Loc,
-                                    DiagnosticsEngine::Level Level,
-                                    SmallVectorImpl<CharSourceRange>& Ranges,
-                                    ArrayRef<FixItHint> Hints,
-                                    const SourceManager &SM,
-                                    unsigned &MacroDepth,
-                                    unsigned OnMacroInst = 0);
+  void emitImportStack(SourceLocation Loc, const SourceManager &SM);
+  void emitImportStackRecursively(SourceLocation Loc, StringRef ModuleName,
+                                  const SourceManager &SM);
+  void emitModuleBuildStack(const SourceManager &SM);
+  void emitCaret(SourceLocation Loc, DiagnosticsEngine::Level Level,
+                 ArrayRef<CharSourceRange> Ranges, ArrayRef<FixItHint> Hints,
+                 const SourceManager &SM);
+  void emitMacroExpansions(SourceLocation Loc,
+                           DiagnosticsEngine::Level Level,
+                           ArrayRef<CharSourceRange> Ranges,
+                           ArrayRef<FixItHint> Hints,
+                           const SourceManager &SM,
+                           unsigned &MacroDepth,
+                           unsigned OnMacroInst = 0);
 public:
   /// \brief Emit a diagnostic.
   ///
@@ -149,7 +164,15 @@ public:
   virtual void emitIncludeLocation(SourceLocation Loc,
                                    PresumedLoc PLoc,
                                    const SourceManager &SM);
-  
+
+  virtual void emitImportLocation(SourceLocation Loc, PresumedLoc PLoc,
+                                  StringRef ModuleName,
+                                  const SourceManager &SM);
+
+  virtual void emitBuildingModuleLocation(SourceLocation Loc, PresumedLoc PLoc,
+                                          StringRef ModuleName,
+                                          const SourceManager &SM);
+
   virtual void emitNote(SourceLocation Loc, StringRef Message,
                         const SourceManager *SM) = 0;
 };
diff --git a/include/clang/Frontend/FrontendAction.h b/include/clang/Frontend/FrontendAction.h
index 3283444..c67be92 100644
--- a/include/clang/Frontend/FrontendAction.h
+++ b/include/clang/Frontend/FrontendAction.h
@@ -6,6 +6,14 @@
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
+///
+/// \file
+/// \brief Defines the clang::FrontendAction interface and various convenience
+/// abstract classes (clang::ASTFrontendAction, clang::PluginASTAction,
+/// clang::PreprocessorFrontendAction, and clang::WrapperFrontendAction)
+/// derived from it.
+///
+//===----------------------------------------------------------------------===//
 
 #ifndef LLVM_CLANG_FRONTEND_FRONTENDACTION_H
 #define LLVM_CLANG_FRONTEND_FRONTENDACTION_H
@@ -13,8 +21,8 @@
 #include "clang/Basic/LLVM.h"
 #include "clang/Basic/LangOptions.h"
 #include "clang/Frontend/FrontendOptions.h"
-#include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/StringRef.h"
 #include <string>
 #include <vector>
 
@@ -24,8 +32,7 @@ class ASTMergeAction;
 class ASTUnit;
 class CompilerInstance;
 
-/// FrontendAction - Abstract base class for actions which can be performed by
-/// the frontend.
+/// Abstract base class for actions which can be performed by the frontend.
 class FrontendAction {
   FrontendInputFile CurrentInput;
   OwningPtr<ASTUnit> CurrentASTUnit;
@@ -41,20 +48,19 @@ protected:
   /// @name Implementation Action Interface
   /// @{
 
-  /// CreateASTConsumer - Create the AST consumer object for this action, if
-  /// supported.
+  /// \brief Create the AST consumer object for this action, if supported.
   ///
-  /// This routine is called as part of \see BeginSourceAction(), which will
+  /// This routine is called as part of BeginSourceFile(), which will
   /// fail if the AST consumer cannot be created. This will not be called if the
   /// action has indicated that it only uses the preprocessor.
   ///
-  /// \param CI - The current compiler instance, provided as a convenience, \see
+  /// \param CI - The current compiler instance, provided as a convenience, see
   /// getCompilerInstance().
   ///
-  /// \param InFile - The current input file, provided as a convenience, \see
+  /// \param InFile - The current input file, provided as a convenience, see
   /// getCurrentFile().
   ///
-  /// \return The new AST consumer, or 0 on failure.
+  /// \return The new AST consumer, or null on failure.
   virtual ASTConsumer *CreateASTConsumer(CompilerInstance &CI,
                                          StringRef InFile) = 0;
 
@@ -62,29 +68,29 @@ protected:
   /// opportunity to modify the CompilerInvocation or do some other action
   /// before BeginSourceFileAction is called.
   ///
-  /// \return True on success; on failure \see BeginSourceFileAction() and
-  /// ExecutionAction() and EndSourceFileAction() will not be called.
+  /// \return True on success; on failure BeginSourceFileAction(),
+  /// ExecuteAction() and EndSourceFileAction() will not be called.
   virtual bool BeginInvocation(CompilerInstance &CI) { return true; }
 
-  /// BeginSourceFileAction - Callback at the start of processing a single
-  /// input.
+  /// \brief Callback at the start of processing a single input.
   ///
-  /// \return True on success; on failure \see ExecutionAction() and
+  /// \return True on success; on failure ExecutionAction() and
   /// EndSourceFileAction() will not be called.
   virtual bool BeginSourceFileAction(CompilerInstance &CI,
                                      StringRef Filename) {
     return true;
   }
 
-  /// ExecuteAction - Callback to run the program action, using the initialized
+  /// \brief Callback to run the program action, using the initialized
   /// compiler instance.
   ///
-  /// This routine is guaranteed to only be called between \see
-  /// BeginSourceFileAction() and \see EndSourceFileAction().
+  /// This is guaranteed to only be called between BeginSourceFileAction()
+  /// and EndSourceFileAction().
   virtual void ExecuteAction() = 0;
 
-  /// EndSourceFileAction - Callback at the end of processing a single input;
-  /// this is guaranteed to only be called following a successful call to
+  /// \brief Callback at the end of processing a single input.
+  ///
+  /// This is guaranteed to only be called following a successful call to
   /// BeginSourceFileAction (and BeginSourceFile).
   virtual void EndSourceFileAction() {}
 
@@ -142,34 +148,35 @@ public:
   /// @name Supported Modes
   /// @{
 
-  /// usesPreprocessorOnly - Does this action only use the preprocessor? If so
-  /// no AST context will be created and this action will be invalid with AST
-  /// file inputs.
+  /// \brief Does this action only use the preprocessor?
+  ///
+  /// If so no AST context will be created and this action will be invalid
+  /// with AST file inputs.
   virtual bool usesPreprocessorOnly() const = 0;
 
   /// \brief For AST-based actions, the kind of translation unit we're handling.
   virtual TranslationUnitKind getTranslationUnitKind() { return TU_Complete; }
 
-  /// hasPCHSupport - Does this action support use with PCH?
+  /// \brief Does this action support use with PCH?
   virtual bool hasPCHSupport() const { return !usesPreprocessorOnly(); }
 
-  /// hasASTFileSupport - Does this action support use with AST files?
+  /// \brief Does this action support use with AST files?
   virtual bool hasASTFileSupport() const { return !usesPreprocessorOnly(); }
 
-  /// hasIRSupport - Does this action support use with IR files?
+  /// \brief Does this action support use with IR files?
   virtual bool hasIRSupport() const { return false; }
 
-  /// hasCodeCompletionSupport - Does this action support use with code
-  /// completion?
+  /// \brief Does this action support use with code completion?
   virtual bool hasCodeCompletionSupport() const { return false; }
 
   /// @}
   /// @name Public Action Interface
   /// @{
 
-  /// BeginSourceFile - Prepare the action for processing the input file
-  /// \p Input; this is run after the options and frontend have been
-  /// initialized, but prior to executing any per-file processing.
+  /// \brief Prepare the action for processing the input file \p Input.
+  ///
+  /// This is run after the options and frontend have been initialized,
+  /// but prior to executing any per-file processing.
   ///
   /// \param CI - The compiler instance this action is being run from. The
   /// action may store and use this object up until the matching EndSourceFile
@@ -180,29 +187,28 @@ public:
   /// several objects which would normally be owned by the
   /// CompilerInstance. When processing AST input files, these objects should
   /// generally not be initialized in the CompilerInstance -- they will
-  /// automatically be shared with the AST file in between \see
-  /// BeginSourceFile() and \see EndSourceFile().
+  /// automatically be shared with the AST file in between
+  /// BeginSourceFile() and EndSourceFile().
   ///
   /// \return True on success; on failure the compilation of this file should
-  /// be aborted and neither Execute nor EndSourceFile should be called.
+  /// be aborted and neither Execute() nor EndSourceFile() should be called.
   bool BeginSourceFile(CompilerInstance &CI, const FrontendInputFile &Input);
 
-  /// Execute - Set the source managers main input file, and run the action.
+  /// \brief Set the source manager's main input file, and run the action.
   bool Execute();
 
-  /// EndSourceFile - Perform any per-file post processing, deallocate per-file
+  /// \brief Perform any per-file post processing, deallocate per-file
   /// objects, and run statistics and output file cleanup code.
   void EndSourceFile();
 
   /// @}
 };
 
-/// ASTFrontendAction - Abstract base class to use for AST consumer based
-/// frontend actions.
+/// \brief Abstract base class to use for AST consumer-based frontend actions.
 class ASTFrontendAction : public FrontendAction {
 protected:
-  /// ExecuteAction - Implement the ExecuteAction interface by running Sema on
-  /// the already initialized AST consumer.
+  /// \brief Implement the ExecuteAction interface by running Sema on
+  /// the already-initialized AST consumer.
   ///
   /// This will also take care of instantiating a code completion consumer if
   /// the user requested it and the action supports it.
@@ -219,7 +225,7 @@ protected:
                                          StringRef InFile) = 0;
 
 public:
-  /// ParseArgs - Parse the given plugin command line arguments.
+  /// \brief Parse the given plugin command line arguments.
   ///
   /// \param CI - The compiler instance, for use in reporting diagnostics.
   /// \return True if the parsing succeeded; otherwise the plugin will be
@@ -229,11 +235,10 @@ public:
                          const std::vector<std::string> &arg) = 0;
 };
 
-/// PreprocessorFrontendAction - Abstract base class to use for preprocessor
-/// based frontend actions.
+/// \brief Abstract base class to use for preprocessor-based frontend actions.
 class PreprocessorFrontendAction : public FrontendAction {
 protected:
-  /// CreateASTConsumer - Provide a default implementation which returns aborts,
+  /// \brief Provide a default implementation which returns aborts;
   /// this method should never be called by FrontendAction clients.
   virtual ASTConsumer *CreateASTConsumer(CompilerInstance &CI,
                                          StringRef InFile);
@@ -242,11 +247,12 @@ public:
   virtual bool usesPreprocessorOnly() const { return true; }
 };
 
-/// WrapperFrontendAction - A frontend action which simply wraps some other
-/// runtime specified frontend action. Deriving from this class allows an
-/// action to inject custom logic around some existing action's behavior. It
-/// implements every virtual method in the FrontendAction interface by
-/// forwarding to the wrapped action.
+/// \brief A frontend action which simply wraps some other runtime-specified
+/// frontend action.
+///
+/// Deriving from this class allows an action to inject custom logic around
+/// some existing action's behavior. It implements every virtual method in
+/// the FrontendAction interface by forwarding to the wrapped action.
 class WrapperFrontendAction : public FrontendAction {
   OwningPtr<FrontendAction> WrappedAction;
 
diff --git a/include/clang/Frontend/FrontendActions.h b/include/clang/Frontend/FrontendActions.h
index 477ac45..1786190 100644
--- a/include/clang/Frontend/FrontendActions.h
+++ b/include/clang/Frontend/FrontendActions.h
@@ -123,7 +123,7 @@ public:
                                           std::string &OutputFile,
                                           raw_ostream *&OS);
 };
-  
+
 class SyntaxOnlyAction : public ASTFrontendAction {
 protected:
   virtual ASTConsumer *CreateASTConsumer(CompilerInstance &CI,
@@ -133,6 +133,21 @@ public:
   virtual bool hasCodeCompletionSupport() const { return true; }
 };
 
+/// \brief Dump information about the given module file, to be used for
+/// basic debugging and discovery.
+class DumpModuleInfoAction : public ASTFrontendAction {
+protected:
+  virtual ASTConsumer *CreateASTConsumer(CompilerInstance &CI,
+                                         StringRef InFile);
+  virtual void ExecuteAction();
+  
+public:
+  virtual bool hasPCHSupport() const { return false; }
+  virtual bool hasASTFileSupport() const { return true; }
+  virtual bool hasIRSupport() const { return false; }
+  virtual bool hasCodeCompletionSupport() const { return false; }
+};
+
 /**
  * \brief Frontend action adaptor that merges ASTs together.
  *
diff --git a/include/clang/Frontend/FrontendOptions.h b/include/clang/Frontend/FrontendOptions.h
index db2f5a5..234e344 100644
--- a/include/clang/Frontend/FrontendOptions.h
+++ b/include/clang/Frontend/FrontendOptions.h
@@ -43,6 +43,7 @@ namespace frontend {
     GeneratePCH,            ///< Generate pre-compiled header.
     GeneratePTH,            ///< Generate pre-tokenized header.
     InitOnly,               ///< Only execute frontend initialization.
+    ModuleFileInfo,         ///< Dump information about a module file.
     ParseSyntaxOnly,        ///< Parse and perform semantic analysis.
     PluginAction,           ///< Run a plugin action, \see ActionName.
     PrintDeclContext,       ///< Print DeclContext and their Decls.
@@ -137,6 +138,10 @@ public:
                                            /// speed up parsing in cases you do
                                            /// not need them (e.g. with code
                                            /// completion).
+  unsigned UseGlobalModuleIndex : 1;       ///< Whether we can use the
+                                           ///< global module index if available.
+  unsigned GenerateGlobalModuleIndex : 1;  ///< Whether we can generate the
+                                           ///< global module index if needed.
 
   CodeCompleteOptions CodeCompleteOpts;
 
@@ -204,20 +209,16 @@ public:
   std::string OverrideRecordLayoutsFile;
   
 public:
-  FrontendOptions() {
-    DisableFree = 0;
-    ProgramAction = frontend::ParseSyntaxOnly;
-    ActionName = "";
-    RelocatablePCH = 0;
-    ShowHelp = 0;
-    ShowStats = 0;
-    ShowTimers = 0;
-    ShowVersion = 0;
-    ARCMTAction = ARCMT_None;
-    ARCMTMigrateEmitARCErrors = 0;
-    SkipFunctionBodies = 0;
-    ObjCMTAction = ObjCMT_None;
-  }
+  FrontendOptions() :
+    DisableFree(false), RelocatablePCH(false), ShowHelp(false),
+    ShowStats(false), ShowTimers(false), ShowVersion(false),
+    FixWhatYouCan(false), FixOnlyWarnings(false), FixAndRecompile(false),
+    FixToTemporaries(false), ARCMTMigrateEmitARCErrors(false),
+    SkipFunctionBodies(false), UseGlobalModuleIndex(true),
+    GenerateGlobalModuleIndex(true),
+    ARCMTAction(ARCMT_None), ObjCMTAction(ObjCMT_None),
+    ProgramAction(frontend::ParseSyntaxOnly)
+  {}
 
   /// getInputKindForExtension - Return the appropriate input kind for a file
   /// extension. For example, "c" would return IK_C.
diff --git a/include/clang/Frontend/LangStandard.h b/include/clang/Frontend/LangStandard.h
index f07cb02..1124d53 100644
--- a/include/clang/Frontend/LangStandard.h
+++ b/include/clang/Frontend/LangStandard.h
@@ -23,7 +23,7 @@ enum LangFeatures {
   C99 = (1 << 2),
   C11 = (1 << 3),
   CPlusPlus = (1 << 4),
-  CPlusPlus0x = (1 << 5),
+  CPlusPlus11 = (1 << 5),
   CPlusPlus1y = (1 << 6),
   Digraphs = (1 << 7),
   GNUMode = (1 << 8),
@@ -69,8 +69,8 @@ public:
   /// isCPlusPlus - Language is a C++ variant.
   bool isCPlusPlus() const { return Flags & frontend::CPlusPlus; }
 
-  /// isCPlusPlus0x - Language is a C++0x variant.
-  bool isCPlusPlus0x() const { return Flags & frontend::CPlusPlus0x; }
+  /// isCPlusPlus11 - Language is a C++0x variant.
+  bool isCPlusPlus11() const { return Flags & frontend::CPlusPlus11; }
 
   /// isCPlusPlus1y - Language is a C++1y variant.
   bool isCPlusPlus1y() const { return Flags & frontend::CPlusPlus1y; }
diff --git a/include/clang/Frontend/LangStandards.def b/include/clang/Frontend/LangStandards.def
index 10807b7..7b2516b 100644
--- a/include/clang/Frontend/LangStandards.def
+++ b/include/clang/Frontend/LangStandards.def
@@ -96,23 +96,23 @@ LANGSTANDARD(gnucxx98, "gnu++98",
 
 LANGSTANDARD(cxx0x, "c++0x",
              "ISO C++ 2011 with amendments",
-             LineComment | CPlusPlus | CPlusPlus0x | Digraphs)
+             LineComment | CPlusPlus | CPlusPlus11 | Digraphs)
 LANGSTANDARD(cxx11, "c++11",
              "ISO C++ 2011 with amendments",
-             LineComment | CPlusPlus | CPlusPlus0x | Digraphs)
+             LineComment | CPlusPlus | CPlusPlus11 | Digraphs)
 LANGSTANDARD(gnucxx0x, "gnu++0x",
              "ISO C++ 2011 with amendments and GNU extensions",
-             LineComment | CPlusPlus | CPlusPlus0x | Digraphs | GNUMode)
+             LineComment | CPlusPlus | CPlusPlus11 | Digraphs | GNUMode)
 LANGSTANDARD(gnucxx11, "gnu++11",
              "ISO C++ 2011 with amendments and GNU extensions",
-             LineComment | CPlusPlus | CPlusPlus0x | Digraphs | GNUMode)
+             LineComment | CPlusPlus | CPlusPlus11 | Digraphs | GNUMode)
 
 LANGSTANDARD(cxx1y, "c++1y",
              "Working draft for ISO C++ 2014",
-             LineComment | CPlusPlus | CPlusPlus0x | CPlusPlus1y | Digraphs)
+             LineComment | CPlusPlus | CPlusPlus11 | CPlusPlus1y | Digraphs)
 LANGSTANDARD(gnucxx1y, "gnu++1y",
              "Working draft for ISO C++ 2014 with GNU extensions",
-             LineComment | CPlusPlus | CPlusPlus0x | CPlusPlus1y | Digraphs |
+             LineComment | CPlusPlus | CPlusPlus11 | CPlusPlus1y | Digraphs |
              GNUMode)
 
 // OpenCL
diff --git a/include/clang/Frontend/LayoutOverrideSource.h b/include/clang/Frontend/LayoutOverrideSource.h
index 225efe6..ec34e14 100644
--- a/include/clang/Frontend/LayoutOverrideSource.h
+++ b/include/clang/Frontend/LayoutOverrideSource.h
@@ -11,6 +11,7 @@
 #define LLVM_CLANG_FRONTEND_LAYOUTOVERRIDESOURCE_H
 
 #include "clang/AST/ExternalASTSource.h"
+#include "clang/Basic/LLVM.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringRef.h"
 
@@ -31,7 +32,7 @@ namespace clang {
       uint64_t Align;
       
       /// \brief The offsets of the fields, in source order.
-      llvm::SmallVector<uint64_t, 8> FieldOffsets;
+      SmallVector<uint64_t, 8> FieldOffsets;
     };
     
     /// \brief The set of layouts that will be overridden.
@@ -42,7 +43,7 @@ namespace clang {
     /// set of record types.
     ///
     /// The file is the result of passing -fdump-record-layouts to a file.
-    explicit LayoutOverrideSource(llvm::StringRef Filename);
+    explicit LayoutOverrideSource(StringRef Filename);
     
     /// \brief If this particular record type has an overridden layout,
     /// return that layout.
diff --git a/include/clang/Frontend/LogDiagnosticPrinter.h b/include/clang/Frontend/LogDiagnosticPrinter.h
index f4fa876..0c700a7 100644
--- a/include/clang/Frontend/LogDiagnosticPrinter.h
+++ b/include/clang/Frontend/LogDiagnosticPrinter.h
@@ -12,8 +12,8 @@
 
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/SourceLocation.h"
-#include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringRef.h"
 
 namespace clang {
 class DiagnosticOptions;
@@ -42,7 +42,7 @@ class LogDiagnosticPrinter : public DiagnosticConsumer {
   
   raw_ostream &OS;
   const LangOptions *LangOpts;
-  llvm::IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts;
+  IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts;
 
   SourceLocation LastWarningLoc;
   FullSourceLoc LastLoc;
diff --git a/include/clang/Frontend/MultiplexConsumer.h b/include/clang/Frontend/MultiplexConsumer.h
index 539f2c5..6ea7547 100644
--- a/include/clang/Frontend/MultiplexConsumer.h
+++ b/include/clang/Frontend/MultiplexConsumer.h
@@ -17,7 +17,6 @@
 
 #include "clang/Basic/LLVM.h"
 #include "clang/Sema/SemaConsumer.h"
-#include "clang/Basic/LLVM.h"
 #include "llvm/ADT/OwningPtr.h"
 #include <vector>
 
diff --git a/include/clang/Frontend/PreprocessorOutputOptions.h b/include/clang/Frontend/PreprocessorOutputOptions.h
index 9793aa6..e273dd6 100644
--- a/include/clang/Frontend/PreprocessorOutputOptions.h
+++ b/include/clang/Frontend/PreprocessorOutputOptions.h
@@ -25,7 +25,7 @@ public:
 
 public:
   PreprocessorOutputOptions() {
-    ShowCPP = 1;
+    ShowCPP = 0;
     ShowComments = 0;
     ShowLineMarkers = 1;
     ShowMacroComments = 0;
diff --git a/include/clang/Frontend/SerializedDiagnosticPrinter.h b/include/clang/Frontend/SerializedDiagnosticPrinter.h
index ab70afd..117771d 100644
--- a/include/clang/Frontend/SerializedDiagnosticPrinter.h
+++ b/include/clang/Frontend/SerializedDiagnosticPrinter.h
@@ -10,6 +10,7 @@
 #ifndef LLVM_CLANG_FRONTEND_SERIALIZE_DIAGNOSTIC_PRINTER_H_
 #define LLVM_CLANG_FRONTEND_SERIALIZE_DIAGNOSTIC_PRINTER_H_
 
+#include "clang/Basic/LLVM.h"
 #include "llvm/Bitcode/BitstreamWriter.h"
 
 namespace llvm {
@@ -53,7 +54,7 @@ enum RecordIDs {
 /// This allows wrapper tools for Clang to get diagnostics from Clang
 /// (via libclang) without needing to parse Clang's command line output.
 ///
-DiagnosticConsumer *create(llvm::raw_ostream *OS,
+DiagnosticConsumer *create(raw_ostream *OS,
                            DiagnosticOptions *diags);
 
 } // end serialized_diags namespace
diff --git a/include/clang/Frontend/TextDiagnostic.h b/include/clang/Frontend/TextDiagnostic.h
index 51f841d..656aa57 100644
--- a/include/clang/Frontend/TextDiagnostic.h
+++ b/include/clang/Frontend/TextDiagnostic.h
@@ -18,8 +18,6 @@
 
 #include "clang/Frontend/DiagnosticRenderer.h"
 
-struct SourceColumnMap;
-
 namespace clang {
 
 /// \brief Class to encapsulate the logic for formatting and printing a textual
@@ -103,6 +101,14 @@ protected:
   virtual void emitIncludeLocation(SourceLocation Loc, PresumedLoc PLoc,
                                    const SourceManager &SM);
 
+  virtual void emitImportLocation(SourceLocation Loc, PresumedLoc PLoc,
+                                  StringRef ModuleName,
+                                  const SourceManager &SM);
+
+  virtual void emitBuildingModuleLocation(SourceLocation Loc, PresumedLoc PLoc,
+                                          StringRef ModuleName,
+                                          const SourceManager &SM);
+
 private:
   void emitSnippetAndCaret(SourceLocation Loc, DiagnosticsEngine::Level Level,
                            SmallVectorImpl<CharSourceRange>& Ranges,
@@ -111,16 +117,6 @@ private:
 
   void emitSnippet(StringRef SourceLine);
 
-  void highlightRange(const CharSourceRange &R,
-                      unsigned LineNo, FileID FID,
-                      const SourceColumnMap &map,
-                      std::string &CaretLine,
-                      const SourceManager &SM);
-
-  std::string buildFixItInsertionLine(unsigned LineNo,
-                                      const SourceColumnMap &map,
-                                      ArrayRef<FixItHint> Hints,
-                                      const SourceManager &SM);
   void emitParseableFixits(ArrayRef<FixItHint> Hints, const SourceManager &SM);
 };
 
diff --git a/include/clang/Frontend/TextDiagnosticPrinter.h b/include/clang/Frontend/TextDiagnosticPrinter.h
index 91ac3c8..470438e 100644
--- a/include/clang/Frontend/TextDiagnosticPrinter.h
+++ b/include/clang/Frontend/TextDiagnosticPrinter.h
@@ -17,8 +17,8 @@
 
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/LLVM.h"
-#include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include "llvm/ADT/OwningPtr.h"
 
 namespace clang {
 class DiagnosticOptions;
@@ -27,7 +27,7 @@ class TextDiagnostic;
 
 class TextDiagnosticPrinter : public DiagnosticConsumer {
   raw_ostream &OS;
-  llvm::IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts;
+  IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts;
 
   /// \brief Handle to the currently active text diagnostic emitter.
   OwningPtr<TextDiagnostic> TextDiag;
diff --git a/include/clang/Frontend/Utils.h b/include/clang/Frontend/Utils.h
index 6b1fc63..8830dce 100644
--- a/include/clang/Frontend/Utils.h
+++ b/include/clang/Frontend/Utils.h
@@ -60,7 +60,8 @@ void InitializePreprocessor(Preprocessor &PP,
 /// ProcessWarningOptions - Initialize the diagnostic client and process the
 /// warning options specified on the command line.
 void ProcessWarningOptions(DiagnosticsEngine &Diags,
-                           const DiagnosticOptions &Opts);
+                           const DiagnosticOptions &Opts,
+                           bool ReportDiags = true);
 
 /// DoPrintPreprocessedInput - Implement -E mode.
 void DoPrintPreprocessedInput(Preprocessor &PP, raw_ostream* OS,
diff --git a/include/clang/Lex/DirectoryLookup.h b/include/clang/Lex/DirectoryLookup.h
index d773fc6..261dfab 100644
--- a/include/clang/Lex/DirectoryLookup.h
+++ b/include/clang/Lex/DirectoryLookup.h
@@ -50,34 +50,34 @@ private:
   /// SrcMgr::CharacteristicKind.
   unsigned DirCharacteristic : 2;
 
-  /// UserSupplied - True if this is a user-supplied directory.
-  ///
-  bool UserSupplied : 1;
-
   /// LookupType - This indicates whether this DirectoryLookup object is a
   /// normal directory, a framework, or a headermap.
   unsigned LookupType : 2;
   
   /// \brief Whether this is a header map used when building a framework.
   unsigned IsIndexHeaderMap : 1;
+
+  /// \brief Whether we've performed an exhaustive search for module maps
+  /// within the subdirectories of this directory.
+  unsigned SearchedAllModuleMaps : 1;
   
 public:
   /// DirectoryLookup ctor - Note that this ctor *does not take ownership* of
   /// 'dir'.
   DirectoryLookup(const DirectoryEntry *dir, SrcMgr::CharacteristicKind DT,
-                  bool isUser, bool isFramework)
-    : DirCharacteristic(DT), UserSupplied(isUser), 
+                  bool isFramework)
+    : DirCharacteristic(DT),
       LookupType(isFramework ? LT_Framework : LT_NormalDir),
-      IsIndexHeaderMap(false) {
+      IsIndexHeaderMap(false), SearchedAllModuleMaps(false) {
     u.Dir = dir;
   }
 
   /// DirectoryLookup ctor - Note that this ctor *does not take ownership* of
   /// 'map'.
   DirectoryLookup(const HeaderMap *map, SrcMgr::CharacteristicKind DT,
-                  bool isUser, bool isIndexHeaderMap)
-    : DirCharacteristic(DT), UserSupplied(isUser), LookupType(LT_HeaderMap),
-      IsIndexHeaderMap(isIndexHeaderMap) {
+                  bool isIndexHeaderMap)
+    : DirCharacteristic(DT), LookupType(LT_HeaderMap),
+      IsIndexHeaderMap(isIndexHeaderMap), SearchedAllModuleMaps(false) {
     u.Map = map;
   }
 
@@ -113,16 +113,22 @@ public:
   /// isHeaderMap - Return true if this is a header map, not a normal directory.
   bool isHeaderMap() const { return getLookupType() == LT_HeaderMap; }
 
+  /// \brief Determine whether we have already searched this entire
+  /// directory for module maps.
+  bool haveSearchedAllModuleMaps() const { return SearchedAllModuleMaps; }
+
+  /// \brief Specify whether we have already searched all of the subdirectories
+  /// for module maps.
+  void setSearchedAllModuleMaps(bool SAMM) {
+    SearchedAllModuleMaps = SAMM;
+  }
+
   /// DirCharacteristic - The type of directory this is, one of the DirType enum
   /// values.
   SrcMgr::CharacteristicKind getDirCharacteristic() const {
     return (SrcMgr::CharacteristicKind)DirCharacteristic;
   }
 
-  /// isUserSupplied - True if this is a user-supplied directory.
-  ///
-  bool isUserSupplied() const { return UserSupplied; }
-
   /// \brief Whether this header map is building a framework or not.
   bool isIndexHeaderMap() const { 
     return isHeaderMap() && IsIndexHeaderMap; 
diff --git a/include/clang/Lex/ExternalPreprocessorSource.h b/include/clang/Lex/ExternalPreprocessorSource.h
index d2e2412..d9a4de4 100644
--- a/include/clang/Lex/ExternalPreprocessorSource.h
+++ b/include/clang/Lex/ExternalPreprocessorSource.h
@@ -15,7 +15,9 @@
 #define LLVM_CLANG_LEX_EXTERNAL_PREPROCESSOR_SOURCE_H
 
 namespace clang {
-  
+
+class IdentifierInfo;
+
 /// \brief Abstract interface for external sources of preprocessor 
 /// information.
 ///
diff --git a/include/clang/Lex/HeaderSearch.h b/include/clang/Lex/HeaderSearch.h
index 4334db7..8a5a798 100644
--- a/include/clang/Lex/HeaderSearch.h
+++ b/include/clang/Lex/HeaderSearch.h
@@ -18,10 +18,10 @@
 #include "clang/Lex/ModuleMap.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/StringMap.h"
 #include "llvm/ADT/StringSet.h"
 #include "llvm/Support/Allocator.h"
-#include "llvm/ADT/OwningPtr.h"
 #include <vector>
 
 namespace clang {
@@ -50,6 +50,9 @@ struct HeaderFileInfo {
 
   /// \brief Whether this header file info was supplied by an external source.
   unsigned External : 1;
+
+  /// \brief Whether this header is part of a module.
+  unsigned isModuleHeader : 1;
   
   /// \brief Whether this structure is considered to already have been
   /// "resolved", meaning that it was loaded from the external source.
@@ -90,7 +93,8 @@ struct HeaderFileInfo {
   
   HeaderFileInfo()
     : isImport(false), isPragmaOnce(false), DirInfo(SrcMgr::C_User), 
-      External(false), Resolved(false), IndexHeaderMapHeader(false),
+      External(false), isModuleHeader(false), Resolved(false),
+      IndexHeaderMapHeader(false),
       NumIncludes(0), ControllingMacroID(0), ControllingMacro(0)  {}
 
   /// \brief Retrieve the controlling macro for this header file, if
@@ -134,7 +138,7 @@ class HeaderSearch {
   };
 
   /// \brief Header-search options used to initialize this header search.
-  llvm::IntrusiveRefCntPtr<HeaderSearchOptions> HSOpts;
+  IntrusiveRefCntPtr<HeaderSearchOptions> HSOpts;
 
   FileManager &FileMgr;
   /// \#include search path information.  Requests for \#include "x" search the
@@ -189,7 +193,7 @@ class HeaderSearch {
   std::vector<std::pair<const FileEntry*, const HeaderMap*> > HeaderMaps;
 
   /// \brief The mapping between modules and headers.
-  ModuleMap ModMap;
+  mutable ModuleMap ModMap;
   
   /// \brief Describes whether a given directory has a module map in it.
   llvm::DenseMap<const DirectoryEntry *, bool> DirectoryHasModuleMap;
@@ -217,7 +221,7 @@ class HeaderSearch {
   friend class DirectoryLookup;
   
 public:
-  HeaderSearch(llvm::IntrusiveRefCntPtr<HeaderSearchOptions> HSOpts,
+  HeaderSearch(IntrusiveRefCntPtr<HeaderSearchOptions> HSOpts,
                FileManager &FM, DiagnosticsEngine &Diags,
                const LangOptions &LangOpts, const TargetInfo *Target);
   ~HeaderSearch();
@@ -363,7 +367,8 @@ public:
       StringRef Filename,
       const FileEntry *RelativeFileEnt,
       SmallVectorImpl<char> *SearchPath,
-      SmallVectorImpl<char> *RelativePath);
+      SmallVectorImpl<char> *RelativePath,
+      Module **SuggestedModule);
 
   /// \brief Look up the specified framework name in our framework cache.
   /// \returns The DirectoryEntry it is in if we know, null otherwise.
@@ -399,6 +404,9 @@ public:
     getFileInfo(File).DirInfo = SrcMgr::C_System;
   }
 
+  /// \brief Mark the specified file as part of a module.
+  void MarkFileModuleHeader(const FileEntry *File);
+
   /// \brief Increment the count for the number of times the specified
   /// FileEntry has been entered.
   void IncrementIncludeCount(const FileEntry *File) {
@@ -468,7 +476,7 @@ public:
   /// \brief Retrieve the module that corresponds to the given file, if any.
   ///
   /// \param File The header that we wish to map to a module.
-  Module *findModuleForHeader(const FileEntry *File);
+  Module *findModuleForHeader(const FileEntry *File) const;
   
   /// \brief Read the contents of the given module map file.
   ///
@@ -480,7 +488,7 @@ public:
   /// \brief Collect the set of all known, top-level modules.
   ///
   /// \param Modules Will be filled with the set of known, top-level modules.
-  void collectAllModules(llvm::SmallVectorImpl<Module *> &Modules);
+  void collectAllModules(SmallVectorImpl<Module *> &Modules);
                          
 private:
   /// \brief Retrieve a module with the given name, which may be part of the
@@ -497,7 +505,11 @@ private:
   Module *loadFrameworkModule(StringRef Name, 
                               const DirectoryEntry *Dir,
                               bool IsSystem);
-  
+
+  /// \brief Load all of the module maps within the immediate subdirectories
+  /// of the given search directory.
+  void loadSubdirectoryModuleMaps(DirectoryLookup &SearchDir);
+
 public:
   /// \brief Retrieve the module map.
   ModuleMap &getModuleMap() { return ModMap; }
diff --git a/include/clang/Lex/HeaderSearchOptions.h b/include/clang/Lex/HeaderSearchOptions.h
index 468fefa..afce5ba 100644
--- a/include/clang/Lex/HeaderSearchOptions.h
+++ b/include/clang/Lex/HeaderSearchOptions.h
@@ -10,8 +10,11 @@
 #ifndef LLVM_CLANG_LEX_HEADERSEARCHOPTIONS_H
 #define LLVM_CLANG_LEX_HEADERSEARCHOPTIONS_H
 
+#include "clang/Basic/LLVM.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include "llvm/ADT/SetVector.h"
 #include "llvm/ADT/StringRef.h"
+#include <string>
 #include <vector>
 
 namespace clang {
@@ -27,6 +30,8 @@ namespace frontend {
     IndexHeaderMap, ///< Like Angled, but marks header maps used when
                        ///  building frameworks.
     System,         ///< Like Angled, but marks system directories.
+    ExternCSystem,  ///< Like System, but headers are implicitly wrapped in
+                    ///  extern "C".
     CSystem,        ///< Like System, but only used for C.
     CXXSystem,      ///< Like System, but only used for C++.
     ObjCSystem,     ///< Like System, but only used for ObjC.
@@ -37,12 +42,11 @@ namespace frontend {
 
 /// HeaderSearchOptions - Helper class for storing options related to the
 /// initialization of the HeaderSearch object.
-class HeaderSearchOptions : public llvm::RefCountedBase<HeaderSearchOptions> {
+class HeaderSearchOptions : public RefCountedBase<HeaderSearchOptions> {
 public:
   struct Entry {
     std::string Path;
     frontend::IncludeDirGroup Group;
-    unsigned IsUserSupplied : 1;
     unsigned IsFramework : 1;
     
     /// IgnoreSysRoot - This is false if an absolute path should be treated
@@ -50,24 +54,10 @@ public:
     /// path.
     unsigned IgnoreSysRoot : 1;
 
-    /// \brief True if this entry is an internal search path.
-    ///
-    /// This typically indicates that users didn't directly provide it, but
-    /// instead it was provided by a compatibility layer for a particular
-    /// system. This isn't redundant with IsUserSupplied (even though perhaps
-    /// it should be) because that is false for user provided '-iwithprefix'
-    /// header search entries.
-    unsigned IsInternal : 1;
-
-    /// \brief True if this entry's headers should be wrapped in extern "C".
-    unsigned ImplicitExternC : 1;
-
-    Entry(StringRef path, frontend::IncludeDirGroup group,
-          bool isUserSupplied, bool isFramework, bool ignoreSysRoot,
-          bool isInternal, bool implicitExternC)
-      : Path(path), Group(group), IsUserSupplied(isUserSupplied),
-        IsFramework(isFramework), IgnoreSysRoot(ignoreSysRoot),
-        IsInternal(isInternal), ImplicitExternC(implicitExternC) {}
+    Entry(StringRef path, frontend::IncludeDirGroup group, bool isFramework,
+          bool ignoreSysRoot)
+      : Path(path), Group(group), IsFramework(isFramework),
+        IgnoreSysRoot(ignoreSysRoot) {}
   };
 
   struct SystemHeaderPrefix {
@@ -98,13 +88,35 @@ public:
 
   /// \brief The directory used for the module cache.
   std::string ModuleCachePath;
-  
+
   /// \brief Whether we should disable the use of the hash string within the
   /// module cache.
   ///
   /// Note: Only used for testing!
   unsigned DisableModuleHash : 1;
-  
+
+  /// \brief The interval (in seconds) between pruning operations.
+  ///
+  /// This operation is expensive, because it requires Clang to walk through
+  /// the directory structure of the module cache, stat()'ing and removing
+  /// files.
+  ///
+  /// The default value is large, e.g., the operation runs once a week.
+  unsigned ModuleCachePruneInterval;
+
+  /// \brief The time (in seconds) after which an unused module file will be
+  /// considered unused and will, therefore, be pruned.
+  ///
+  /// When the module cache is pruned, any module file that has not been
+  /// accessed in this many seconds will be removed. The default value is
+  /// large, e.g., a month, to avoid forcing infrequently-used modules to be
+  /// regenerated often.
+  unsigned ModuleCachePruneAfter;
+
+  /// \brief The set of macro names that should be ignored for the purposes
+  /// of computing the module hash.
+  llvm::SetVector<std::string> ModulesIgnoreMacros;
+
   /// Include the compiler builtin includes.
   unsigned UseBuiltinIncludes : 1;
 
@@ -122,16 +134,17 @@ public:
 
 public:
   HeaderSearchOptions(StringRef _Sysroot = "/")
-    : Sysroot(_Sysroot), DisableModuleHash(0), UseBuiltinIncludes(true),
+    : Sysroot(_Sysroot), DisableModuleHash(0),
+      ModuleCachePruneInterval(7*24*60*60),
+      ModuleCachePruneAfter(31*24*60*60),
+      UseBuiltinIncludes(true),
       UseStandardSystemIncludes(true), UseStandardCXXIncludes(true),
       UseLibcxx(false), Verbose(false) {}
 
   /// AddPath - Add the \p Path path to the specified \p Group list.
   void AddPath(StringRef Path, frontend::IncludeDirGroup Group,
-               bool IsUserSupplied, bool IsFramework, bool IgnoreSysRoot,
-               bool IsInternal = false, bool ImplicitExternC = false) {
-    UserEntries.push_back(Entry(Path, Group, IsUserSupplied, IsFramework,
-                                IgnoreSysRoot, IsInternal, ImplicitExternC));
+               bool IsFramework, bool IgnoreSysRoot) {
+    UserEntries.push_back(Entry(Path, Group, IsFramework, IgnoreSysRoot));
   }
 
   /// AddSystemHeaderPrefix - Override whether \#include directives naming a
diff --git a/include/clang/Lex/Lexer.h b/include/clang/Lex/Lexer.h
index 407b644..cb4f57f 100644
--- a/include/clang/Lex/Lexer.h
+++ b/include/clang/Lex/Lexer.h
@@ -14,11 +14,11 @@
 #ifndef LLVM_CLANG_LEXER_H
 #define LLVM_CLANG_LEXER_H
 
-#include "clang/Lex/PreprocessorLexer.h"
 #include "clang/Basic/LangOptions.h"
+#include "clang/Lex/PreprocessorLexer.h"
 #include "llvm/ADT/SmallVector.h"
-#include <string>
 #include <cassert>
+#include <string>
 
 namespace clang {
 class DiagnosticsEngine;
@@ -174,8 +174,8 @@ public:
   /// SetKeepWhitespaceMode - This method lets clients enable or disable
   /// whitespace retention mode.
   void SetKeepWhitespaceMode(bool Val) {
-    assert((!Val || LexingRawMode) &&
-           "Can only enable whitespace retention in raw mode");
+    assert((!Val || LexingRawMode || LangOpts.TraditionalCPP) &&
+           "Can only retain whitespace in raw mode or -traditional-cpp");
     ExtendedTokenMode = Val ? 2 : 0;
   }
 
@@ -194,6 +194,14 @@ public:
     ExtendedTokenMode = Mode ? 1 : 0;
   }
 
+  /// Sets the extended token mode back to its initial value, according to the
+  /// language options and preprocessor. This controls whether the lexer
+  /// produces comment and whitespace tokens.
+  ///
+  /// This requires the lexer to have an associated preprocessor. A standalone
+  /// lexer has nothing to reset to.
+  void resetExtendedTokenMode();
+
   const char *getBufferStart() const { return BufferStart; }
 
   /// ReadToEndOfLine - Read the rest of the current preprocessor line as an
@@ -260,10 +268,10 @@ public:
   /// location and does not jump to the expansion or spelling
   /// location.
   static StringRef getSpelling(SourceLocation loc,
-                                     SmallVectorImpl<char> &buffer,
-                                     const SourceManager &SourceMgr,
-                                     const LangOptions &LangOpts,
-                                     bool *invalid = 0);
+                               SmallVectorImpl<char> &buffer,
+                               const SourceManager &SourceMgr,
+                               const LangOptions &LangOpts,
+                               bool *invalid = 0);
   
   /// MeasureTokenLength - Relex the token at the specified location and return
   /// its length in bytes in the input file.  If the token needs cleaning (e.g.
@@ -273,6 +281,12 @@ public:
                                      const SourceManager &SM,
                                      const LangOptions &LangOpts);
 
+  /// \brief Relex the token at the specified location.
+  /// \returns true if there was a failure, false on success.
+  static bool getRawToken(SourceLocation Loc, Token &Result,
+                          const SourceManager &SM,
+                          const LangOptions &LangOpts);
+
   /// \brief Given a location any where in a source buffer, find the location
   /// that corresponds to the beginning of the token in which the original
   /// source location lands.
@@ -431,6 +445,11 @@ private:
   ///
   void LexTokenInternal(Token &Result);
 
+  /// Given that a token begins with the Unicode character \p C, figure out
+  /// what kind of token it is and dispatch to the appropriate lexing helper
+  /// function.
+  void LexUnicode(Token &Result, uint32_t C, const char *CurPtr);
+
   /// FormTokenWithChars - When we lex a token, we have identified a span
   /// starting at BufferPtr, going to TokEnd that forms the token.  This method
   /// takes that range and assigns it to the token as its location and size.  In
@@ -573,6 +592,21 @@ private:
   void cutOffLexing() { BufferPtr = BufferEnd; }
 
   bool isHexaLiteral(const char *Start, const LangOptions &LangOpts);
+
+
+  /// Read a universal character name.
+  ///
+  /// \param CurPtr The position in the source buffer after the initial '\'.
+  ///               If the UCN is syntactically well-formed (but not necessarily
+  ///               valid), this parameter will be updated to point to the
+  ///               character after the UCN.
+  /// \param SlashLoc The position in the source buffer of the '\'.
+  /// \param Tok The token being formed. Pass \c NULL to suppress diagnostics
+  ///            and handle token formation in the caller.
+  ///
+  /// \return The Unicode codepoint specified by the UCN, or 0 if the UCN is
+  ///         invalid.
+  uint32_t tryReadUCN(const char *&CurPtr, const char *SlashLoc, Token *Tok);
 };
 
 
diff --git a/include/clang/Lex/LiteralSupport.h b/include/clang/Lex/LiteralSupport.h
index 3b68d1b..b1430cc 100644
--- a/include/clang/Lex/LiteralSupport.h
+++ b/include/clang/Lex/LiteralSupport.h
@@ -15,13 +15,13 @@
 #ifndef CLANG_LITERALSUPPORT_H
 #define CLANG_LITERALSUPPORT_H
 
+#include "clang/Basic/CharInfo.h"
 #include "clang/Basic/LLVM.h"
+#include "clang/Basic/TokenKinds.h"
 #include "llvm/ADT/APFloat.h"
 #include "llvm/ADT/SmallString.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/DataTypes.h"
-#include "clang/Basic/TokenKinds.h"
-#include <cctype>
 
 namespace clang {
 
@@ -101,7 +101,7 @@ private:
   /// SkipHexDigits - Read and skip over any hex digits, up to End.
   /// Return a pointer to the first non-hex digit or End.
   const char *SkipHexDigits(const char *ptr) {
-    while (ptr != ThisTokEnd && isxdigit(*ptr))
+    while (ptr != ThisTokEnd && isHexDigit(*ptr))
       ptr++;
     return ptr;
   }
@@ -117,7 +117,7 @@ private:
   /// SkipDigits - Read and skip over any digits, up to End.
   /// Return a pointer to the first non-hex digit or End.
   const char *SkipDigits(const char *ptr) {
-    while (ptr != ThisTokEnd && isdigit(*ptr))
+    while (ptr != ThisTokEnd && isDigit(*ptr))
       ptr++;
     return ptr;
   }
diff --git a/include/clang/Lex/MacroInfo.h b/include/clang/Lex/MacroInfo.h
index aba77d5..64323b7 100644
--- a/include/clang/Lex/MacroInfo.h
+++ b/include/clang/Lex/MacroInfo.h
@@ -6,9 +6,10 @@
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
-//
-// This file defines the MacroInfo interface.
-//
+///
+/// \file
+/// \brief Defines the clang::MacroInfo and clang::MacroDirective classes.
+///
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_CLANG_MACROINFO_H
@@ -22,34 +23,28 @@
 namespace clang {
   class Preprocessor;
 
-/// MacroInfo - Each identifier that is \#define'd has an instance of this class
-/// associated with it, used to implement macro expansion.
+/// \brief Encapsulates the data about a macro definition (e.g. its tokens).
+///
+/// There's an instance of this class for every #define.
 class MacroInfo {
   //===--------------------------------------------------------------------===//
   // State set when the macro is defined.
 
-  /// Location - This is the place the macro is defined.
+  /// \brief The location the macro is defined.
   SourceLocation Location;
-  /// EndLocation - The location of the last token in the macro.
+  /// \brief The location of the last token in the macro.
   SourceLocation EndLocation;
-  /// \brief The location where the macro was #undef'd, or an invalid location
-  /// for macros that haven't been undefined.
-  SourceLocation UndefLocation;
-  /// \brief Previous definition, the identifier of this macro was defined to,
-  /// or NULL.
-  MacroInfo *PreviousDefinition;
 
-  /// Arguments - The list of arguments for a function-like macro.  This can be
-  /// empty, for, e.g. "#define X()".  In a C99-style variadic macro, this
+  /// \brief The list of arguments for a function-like macro.
+  ///
+  /// ArgumentList points to the first of NumArguments pointers.
+  ///
+  /// This can be empty, for, e.g. "#define X()".  In a C99-style variadic macro, this
   /// includes the \c __VA_ARGS__ identifier on the list.
   IdentifierInfo **ArgumentList;
-  unsigned NumArguments;
 
-  /// \brief The location at which this macro was either explicitly exported
-  /// from its module or marked as private.
-  ///
-  /// If invalid, this macro has not been explicitly given any visibility.
-  SourceLocation VisibilityLocation;
+  /// \see ArgumentList
+  unsigned NumArguments;
   
   /// \brief This is the list of tokens that the macro is defined to.
   SmallVector<Token, 8> ReplacementTokens;
@@ -58,119 +53,88 @@ class MacroInfo {
   mutable unsigned DefinitionLength;
   mutable bool IsDefinitionLengthCached : 1;
 
-  /// \brief True if this macro is a function-like macro, false if it
-  /// is an object-like macro.
+  /// \brief True if this macro is function-like, false if it is object-like.
   bool IsFunctionLike : 1;
 
-  /// IsC99Varargs - True if this macro is of the form "#define X(...)" or
-  /// "#define X(Y,Z,...)".  The __VA_ARGS__ token should be replaced with the
-  /// contents of "..." in an invocation.
+  /// \brief True if this macro is of the form "#define X(...)" or
+  /// "#define X(Y,Z,...)".
+  ///
+  /// The __VA_ARGS__ token should be replaced with the contents of "..." in an
+  /// invocation.
   bool IsC99Varargs : 1;
 
-  /// IsGNUVarargs -  True if this macro is of the form "#define X(a...)".  The
-  /// "a" identifier in the replacement list will be replaced with all arguments
+  /// \brief True if this macro is of the form "#define X(a...)".
+  ///
+  /// The "a" identifier in the replacement list will be replaced with all arguments
   /// of the macro starting with the specified one.
   bool IsGNUVarargs : 1;
 
-  /// IsBuiltinMacro - True if this is a builtin macro, such as __LINE__, and if
-  /// it has not yet been redefined or undefined.
+  /// \brief True if this macro requires processing before expansion.
+  ///
+  /// This is the case for builtin macros such as __LINE__, so long as they have
+  /// not been redefined, but not for regular predefined macros from the "<built-in>"
+  /// memory buffer (see Preprocessing::getPredefinesFileID).
   bool IsBuiltinMacro : 1;
 
-  /// \brief True if this macro was loaded from an AST file.
-  bool IsFromAST : 1;
-
-  /// \brief Whether this macro changed after it was loaded from an AST file.
-  bool ChangedAfterLoad : 1;
+  /// \brief Whether this macro contains the sequence ", ## __VA_ARGS__"
+  bool HasCommaPasting : 1;
   
 private:
   //===--------------------------------------------------------------------===//
   // State that changes as the macro is used.
 
-  /// IsDisabled - True if we have started an expansion of this macro already.
+  /// \brief True if we have started an expansion of this macro already.
+  ///
   /// This disables recursive expansion, which would be quite bad for things
   /// like \#define A A.
   bool IsDisabled : 1;
 
-  /// IsUsed - True if this macro is either defined in the main file and has
-  /// been used, or if it is not defined in the main file.  This is used to
-  /// emit -Wunused-macros diagnostics.
+  /// \brief True if this macro is either defined in the main file and has
+  /// been used, or if it is not defined in the main file.
+  ///
+  /// This is used to emit -Wunused-macros diagnostics.
   bool IsUsed : 1;
 
-  /// AllowRedefinitionsWithoutWarning - True if this macro can be redefined
-  /// without emitting a warning.
+  /// \brief True if this macro can be redefined without emitting a warning.
   bool IsAllowRedefinitionsWithoutWarning : 1;
 
   /// \brief Must warn if the macro is unused at the end of translation unit.
   bool IsWarnIfUnused : 1;
-   
-  /// \brief Whether the macro has public (when described in a module).
-  bool IsPublic : 1;
 
-  /// \brief Whether the macro definition is currently "hidden".
-  /// Note that this is transient state that is never serialized to the AST
-  /// file.
-  bool IsHidden : 1;
+  /// \brief Whether this macro info was loaded from an AST file.
+  unsigned FromASTFile : 1;
 
-  /// \brief Whether the definition of this macro is ambiguous, due to
-  /// multiple definitions coming in from multiple modules.
-  bool IsAmbiguous : 1;
-
-   ~MacroInfo() {
+  ~MacroInfo() {
     assert(ArgumentList == 0 && "Didn't call destroy before dtor!");
   }
 
 public:
   MacroInfo(SourceLocation DefLoc);
-  MacroInfo(const MacroInfo &MI, llvm::BumpPtrAllocator &PPAllocator);
   
-  /// FreeArgumentList - Free the argument list of the macro, restoring it to a
-  /// state where it can be reused for other devious purposes.
+  /// \brief Free the argument list of the macro.
+  ///
+  /// This restores this MacroInfo to a state where it can be reused for other
+  /// devious purposes.
   void FreeArgumentList() {
     ArgumentList = 0;
     NumArguments = 0;
   }
 
-  /// Destroy - destroy this MacroInfo object.
+  /// \brief Destroy this MacroInfo object.
   void Destroy() {
     FreeArgumentList();
     this->~MacroInfo();
   }
 
-  /// getDefinitionLoc - Return the location that the macro was defined at.
-  ///
+  /// \brief Return the location that the macro was defined at.
   SourceLocation getDefinitionLoc() const { return Location; }
 
-  /// setDefinitionEndLoc - Set the location of the last token in the macro.
-  ///
+  /// \brief Set the location of the last token in the macro.
   void setDefinitionEndLoc(SourceLocation EndLoc) { EndLocation = EndLoc; }
 
-  /// getDefinitionEndLoc - Return the location of the last token in the macro.
-  ///
+  /// \brief Return the location of the last token in the macro.
   SourceLocation getDefinitionEndLoc() const { return EndLocation; }
 
-  /// \brief Set the location where macro was undefined. Can only be set once.
-  void setUndefLoc(SourceLocation UndefLoc) {
-    assert(UndefLocation.isInvalid() && "UndefLocation is already set!");
-    assert(UndefLoc.isValid() && "Invalid UndefLoc!");
-    UndefLocation = UndefLoc;
-  }
-
-  /// \brief Get the location where macro was undefined.
-  SourceLocation getUndefLoc() const { return UndefLocation; }
-
-  /// \brief Set previous definition of the macro with the same name.
-  void setPreviousDefinition(MacroInfo *PreviousDef) {
-    PreviousDefinition = PreviousDef;
-  }
-
-  /// \brief Get previous definition of the macro with the same name.
-  MacroInfo *getPreviousDefinition() { return PreviousDefinition; }
-
-  /// \brief Find macro definition active in the specified source location. If
-  /// this macro was not defined there, return NULL.
-  const MacroInfo *findDefinitionAtLoc(SourceLocation L,
-                                       SourceManager &SM) const;
-
   /// \brief Get length in characters of the macro definition.
   unsigned getDefinitionLength(SourceManager &SM) const {
     if (IsDefinitionLengthCached)
@@ -178,25 +142,27 @@ public:
     return getDefinitionLengthSlow(SM);
   }
 
-  /// isIdenticalTo - Return true if the specified macro definition is equal to
-  /// this macro in spelling, arguments, and whitespace.  This is used to emit
-  /// duplicate definition warnings.  This implements the rules in C99 6.10.3.
-  bool isIdenticalTo(const MacroInfo &Other, Preprocessor &PP) const;
-
-  /// setIsBuiltinMacro - Set or clear the isBuiltinMacro flag.
+  /// \brief Return true if the specified macro definition is equal to
+  /// this macro in spelling, arguments, and whitespace.
   ///
+  /// \param Syntactically if true, the macro definitions can be identical even
+  /// if they use different identifiers for the function macro parameters.
+  /// Otherwise the comparison is lexical and this implements the rules in
+  /// C99 6.10.3.
+  bool isIdenticalTo(const MacroInfo &Other, Preprocessor &PP,
+                     bool Syntactically) const;
+
+  /// \brief Set or clear the isBuiltinMacro flag.
   void setIsBuiltinMacro(bool Val = true) {
     IsBuiltinMacro = Val;
   }
 
-  /// setIsUsed - Set the value of the IsUsed flag.
-  ///
+  /// \brief Set the value of the IsUsed flag.
   void setIsUsed(bool Val) {
     IsUsed = Val;
   }
 
-  /// setIsAllowRedefinitionsWithoutWarning - Set the value of the 
-  /// IsAllowRedefinitionsWithoutWarning flag.
+  /// \brief Set the value of the IsAllowRedefinitionsWithoutWarning flag.
   void setIsAllowRedefinitionsWithoutWarning(bool Val) {
     IsAllowRedefinitionsWithoutWarning = Val;
   }
@@ -206,8 +172,8 @@ public:
     IsWarnIfUnused = val;
   }
 
-  /// setArgumentList - Set the specified list of identifiers as the argument
-  /// list for this macro.
+  /// \brief Set the specified list of identifiers as the argument list for
+  /// this macro.
   void setArgumentList(IdentifierInfo* const *List, unsigned NumArgs,
                        llvm::BumpPtrAllocator &PPAllocator) {
     assert(ArgumentList == 0 && NumArguments == 0 &&
@@ -228,7 +194,7 @@ public:
   arg_iterator arg_end() const { return ArgumentList+NumArguments; }
   unsigned getNumArgs() const { return NumArguments; }
 
-  /// getArgumentNum - Return the argument number of the specified identifier,
+  /// \brief Return the argument number of the specified identifier,
   /// or -1 if the identifier is not a formal argument identifier.
   int getArgumentNum(IdentifierInfo *Arg) const {
     for (arg_iterator I = arg_begin(), E = arg_end(); I != E; ++I)
@@ -249,30 +215,22 @@ public:
   bool isGNUVarargs() const { return IsGNUVarargs; }
   bool isVariadic() const { return IsC99Varargs | IsGNUVarargs; }
 
-  /// isBuiltinMacro - Return true if this macro is a builtin macro, such as
-  /// __LINE__, which requires processing before expansion.
+  /// \brief Return true if this macro requires processing before expansion.
+  ///
+  /// This is true only for builtin macro, such as \__LINE__, whose values
+  /// are not given by fixed textual expansions.  Regular predefined macros
+  /// from the "<built-in>" buffer are not reported as builtins by this
+  /// function.
   bool isBuiltinMacro() const { return IsBuiltinMacro; }
 
-  /// isFromAST - Return true if this macro was loaded from an AST file.
-  bool isFromAST() const { return IsFromAST; }
-
-  /// setIsFromAST - Set whether this macro was loaded from an AST file.
-  void setIsFromAST(bool FromAST = true) { IsFromAST = FromAST; }
+  bool hasCommaPasting() const { return HasCommaPasting; }
+  void setHasCommaPasting() { HasCommaPasting = true; }
 
-  /// \brief Determine whether this macro has changed since it was loaded from
-  /// an AST file.
-  bool hasChangedAfterLoad() const { return ChangedAfterLoad; }
-  
-  /// \brief Note whether this macro has changed after it was loaded from an
-  /// AST file.
-  void setChangedAfterLoad(bool CAL = true) { ChangedAfterLoad = CAL; }
-  
-  /// isUsed - Return false if this macro is defined in the main file and has
+  /// \brief Return false if this macro is defined in the main file and has
   /// not yet been used.
   bool isUsed() const { return IsUsed; }
 
-  /// isAllowRedefinitionsWithoutWarning - Return true if this macro can be
-  /// redefined without warning.
+  /// \brief Return true if this macro can be redefined without warning.
   bool isAllowRedefinitionsWithoutWarning() const {
     return IsAllowRedefinitionsWithoutWarning;
   }
@@ -282,7 +240,7 @@ public:
     return IsWarnIfUnused;
   }
 
-  /// getNumTokens - Return the number of tokens that this macro expands to.
+  /// \brief Return the number of tokens that this macro expands to.
   ///
   unsigned getNumTokens() const {
     return ReplacementTokens.size();
@@ -298,16 +256,16 @@ public:
   tokens_iterator tokens_end() const { return ReplacementTokens.end(); }
   bool tokens_empty() const { return ReplacementTokens.empty(); }
 
-  /// AddTokenToBody - Add the specified token to the replacement text for the
-  /// macro.
+  /// \brief Add the specified token to the replacement text for the macro.
   void AddTokenToBody(const Token &Tok) {
     assert(!IsDefinitionLengthCached &&
           "Changing replacement tokens after definition length got calculated");
     ReplacementTokens.push_back(Tok);
   }
 
-  /// isEnabled - Return true if this macro is enabled: in other words, that we
-  /// are not currently in an expansion of this macro.
+  /// \brief Return true if this macro is enabled.
+  ///
+  /// In other words, that we are not currently in an expansion of this macro.
   bool isEnabled() const { return !IsDisabled; }
 
   void EnableMacro() {
@@ -320,41 +278,272 @@ public:
     IsDisabled = true;
   }
 
-  /// \brief Set the export location for this macro.
-  void setVisibility(bool Public, SourceLocation Loc) {
-    VisibilityLocation = Loc;
-    IsPublic = Public;
+  /// \brief Determine whether this macro info came from an AST file (such as
+  /// a precompiled header or module) rather than having been parsed.
+  bool isFromASTFile() const { return FromASTFile; }
+
+  /// \brief Retrieve the global ID of the module that owns this particular
+  /// macro info.
+  unsigned getOwningModuleID() const {
+    if (isFromASTFile())
+      return *(const unsigned*)(this+1);
+
+    return 0;
   }
 
-  /// \brief Determine whether this macro is part of the public API of its
-  /// module.
-  bool isPublic() const { return IsPublic; }
-  
-  /// \brief Determine the location where this macro was explicitly made
-  /// public or private within its module.
-  SourceLocation getVisibilityLocation() { return VisibilityLocation; }
+private:
+  unsigned getDefinitionLengthSlow(SourceManager &SM) const;
+
+  void setOwningModuleID(unsigned ID) {
+    assert(isFromASTFile());
+    *(unsigned*)(this+1) = ID;
+  }
+
+  friend class Preprocessor;
+};
+
+class DefMacroDirective;
+
+/// \brief Encapsulates changes to the "macros namespace" (the location where
+/// the macro name became active, the location where it was undefined, etc.).
+///
+/// MacroDirectives, associated with an identifier, are used to model the macro
+/// history. Usually a macro definition (MacroInfo) is where a macro name
+/// becomes active (MacroDirective) but modules can have their own macro
+/// history, separate from the local (current translation unit) macro history.
+///
+/// For example, if "@import A;" imports macro FOO, there will be a new local
+/// MacroDirective created to indicate that "FOO" became active at the import
+/// location. Module "A" itself will contain another MacroDirective in its macro
+/// history (at the point of the definition of FOO) and both MacroDirectives
+/// will point to the same MacroInfo object.
+///
+class MacroDirective {
+public:
+  enum Kind {
+    MD_Define,
+    MD_Undefine,
+    MD_Visibility
+  };
+
+protected:
+  /// \brief Previous macro directive for the same identifier, or NULL.
+  MacroDirective *Previous;
+
+  SourceLocation Loc;
+
+  /// \brief MacroDirective kind.
+  unsigned MDKind : 2;
+
+  /// \brief True if the macro directive was loaded from a PCH file.
+  bool IsFromPCH : 1;
 
-  /// \brief Determine whether this macro is currently defined (and has not
-  /// been #undef'd) or has been hidden.
-  bool isDefined() const { return UndefLocation.isInvalid() && !IsHidden; }
+  /// \brief Whether the macro directive is currently "hidden".
+  ///
+  /// Note that this is transient state that is never serialized to the AST
+  /// file.
+  bool IsHidden : 1;
+
+  // Used by DefMacroDirective -----------------------------------------------//
 
-  /// \brief Determine whether this macro definition is hidden.
+  /// \brief True if this macro was imported from a module.
+  bool IsImported : 1;
+
+  /// \brief Whether the definition of this macro is ambiguous, due to
+  /// multiple definitions coming in from multiple modules.
+  bool IsAmbiguous : 1;
+
+  // Used by VisibilityMacroDirective ----------------------------------------//
+
+  /// \brief Whether the macro has public visibility (when described in a
+  /// module).
+  bool IsPublic : 1;
+
+  MacroDirective(Kind K, SourceLocation Loc)
+    : Previous(0), Loc(Loc), MDKind(K), IsFromPCH(false), IsHidden(false),
+      IsImported(false), IsAmbiguous(false),
+      IsPublic(true) {
+  }
+
+public:
+  Kind getKind() const { return Kind(MDKind); }
+
+  SourceLocation getLocation() const { return Loc; }
+
+  /// \brief Set previous definition of the macro with the same name.
+  void setPrevious(MacroDirective *Prev) {
+    Previous = Prev;
+  }
+
+  /// \brief Get previous definition of the macro with the same name.
+  const MacroDirective *getPrevious() const { return Previous; }
+
+  /// \brief Get previous definition of the macro with the same name.
+  MacroDirective *getPrevious() { return Previous; }
+
+  /// \brief Return true if the macro directive was loaded from a PCH file.
+  bool isFromPCH() const { return IsFromPCH; }
+
+  void setIsFromPCH() { IsFromPCH = true; }
+
+  /// \brief Determine whether this macro directive is hidden.
   bool isHidden() const { return IsHidden; }
 
-  /// \brief Set whether this macro definition is hidden.
+  /// \brief Set whether this macro directive is hidden.
   void setHidden(bool Val) { IsHidden = Val; }
 
+  class DefInfo {
+    DefMacroDirective *DefDirective;
+    SourceLocation UndefLoc;
+    bool IsPublic;
+
+  public:
+    DefInfo() : DefDirective(0) { }
+
+    DefInfo(DefMacroDirective *DefDirective, SourceLocation UndefLoc,
+            bool isPublic)
+      : DefDirective(DefDirective), UndefLoc(UndefLoc), IsPublic(isPublic) { }
+
+    const DefMacroDirective *getDirective() const { return DefDirective; }
+          DefMacroDirective *getDirective()       { return DefDirective; }
+
+    inline SourceLocation getLocation() const;
+    inline MacroInfo *getMacroInfo();
+    const MacroInfo *getMacroInfo() const {
+      return const_cast<DefInfo*>(this)->getMacroInfo();
+    }
+
+    SourceLocation getUndefLocation() const { return UndefLoc; }
+    bool isUndefined() const { return UndefLoc.isValid(); }
+
+    bool isPublic() const { return IsPublic; }
+
+    bool isValid() const { return DefDirective != 0; }
+    bool isInvalid() const { return !isValid(); }
+
+    operator bool() const { return isValid(); }
+
+    inline DefInfo getPreviousDefinition(bool AllowHidden = false);
+    const DefInfo getPreviousDefinition(bool AllowHidden = false) const {
+      return const_cast<DefInfo*>(this)->getPreviousDefinition(AllowHidden);
+    }
+  };
+
+  /// \brief Traverses the macro directives history and returns the next
+  /// macro definition directive along with info about its undefined location
+  /// (if there is one) and if it is public or private.
+  DefInfo getDefinition(bool AllowHidden = false);
+  const DefInfo getDefinition(bool AllowHidden = false) const {
+    return const_cast<MacroDirective*>(this)->getDefinition(AllowHidden);
+  }
+
+  bool isDefined(bool AllowHidden = false) const {
+    if (const DefInfo Def = getDefinition(AllowHidden))
+      return !Def.isUndefined();
+    return false;
+  }
+
+  const MacroInfo *getMacroInfo(bool AllowHidden = false) const {
+    return getDefinition(AllowHidden).getMacroInfo();
+  }
+  MacroInfo *getMacroInfo(bool AllowHidden = false) {
+    return getDefinition(AllowHidden).getMacroInfo();
+  }
+
+  /// \brief Find macro definition active in the specified source location. If
+  /// this macro was not defined there, return NULL.
+  const DefInfo findDirectiveAtLoc(SourceLocation L, SourceManager &SM) const;
+
+  static bool classof(const MacroDirective *) { return true; }
+};
+
+/// \brief A directive for a defined macro or a macro imported from a module.
+class DefMacroDirective : public MacroDirective {
+  MacroInfo *Info;
+
+public:
+  explicit DefMacroDirective(MacroInfo *MI)
+    : MacroDirective(MD_Define, MI->getDefinitionLoc()), Info(MI) {
+    assert(MI && "MacroInfo is null");
+  }
+
+  DefMacroDirective(MacroInfo *MI, SourceLocation Loc, bool isImported)
+    : MacroDirective(MD_Define, Loc), Info(MI) {
+    assert(MI && "MacroInfo is null");
+    IsImported = isImported;
+  }
+
+  /// \brief The data for the macro definition.
+  const MacroInfo *getInfo() const { return Info; }
+  MacroInfo *getInfo() { return Info; }
+
+  /// \brief True if this macro was imported from a module.
+  bool isImported() const { return IsImported; }
+
   /// \brief Determine whether this macro definition is ambiguous with
   /// other macro definitions.
   bool isAmbiguous() const { return IsAmbiguous; }
 
   /// \brief Set whether this macro definition is ambiguous.
   void setAmbiguous(bool Val) { IsAmbiguous = Val; }
-  
-private:
-  unsigned getDefinitionLengthSlow(SourceManager &SM) const;
+
+  static bool classof(const MacroDirective *MD) {
+    return MD->getKind() == MD_Define;
+  }
+  static bool classof(const DefMacroDirective *) { return true; }
+};
+
+/// \brief A directive for an undefined macro.
+class UndefMacroDirective : public MacroDirective  {
+public:
+  explicit UndefMacroDirective(SourceLocation UndefLoc)
+    : MacroDirective(MD_Undefine, UndefLoc) {
+    assert(UndefLoc.isValid() && "Invalid UndefLoc!");
+  }
+
+  static bool classof(const MacroDirective *MD) {
+    return MD->getKind() == MD_Undefine;
+  }
+  static bool classof(const UndefMacroDirective *) { return true; }
+};
+
+/// \brief A directive for setting the module visibility of a macro.
+class VisibilityMacroDirective : public MacroDirective  {
+public:
+  explicit VisibilityMacroDirective(SourceLocation Loc, bool Public)
+    : MacroDirective(MD_Visibility, Loc) {
+    IsPublic = Public;
+  }
+
+  /// \brief Determine whether this macro is part of the public API of its
+  /// module.
+  bool isPublic() const { return IsPublic; }
+
+  static bool classof(const MacroDirective *MD) {
+    return MD->getKind() == MD_Visibility;
+  }
+  static bool classof(const VisibilityMacroDirective *) { return true; }
 };
 
+inline SourceLocation MacroDirective::DefInfo::getLocation() const {
+  if (isInvalid())
+    return SourceLocation();
+  return DefDirective->getLocation();
+}
+
+inline MacroInfo *MacroDirective::DefInfo::getMacroInfo() {
+  if (isInvalid())
+    return 0;
+  return DefDirective->getInfo();
+}
+
+inline MacroDirective::DefInfo
+MacroDirective::DefInfo::getPreviousDefinition(bool AllowHidden) {
+  if (isInvalid() || DefDirective->getPrevious() == 0)
+    return DefInfo();
+  return DefDirective->getPrevious()->getDefinition(AllowHidden);
+}
+
 }  // end namespace clang
 
 #endif
diff --git a/include/clang/Lex/ModuleLoader.h b/include/clang/Lex/ModuleLoader.h
index 36d03c0..3acf915 100644
--- a/include/clang/Lex/ModuleLoader.h
+++ b/include/clang/Lex/ModuleLoader.h
@@ -17,16 +17,36 @@
 #include "clang/Basic/Module.h"
 #include "clang/Basic/SourceLocation.h"
 #include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/PointerIntPair.h"
 
 namespace clang {
 
 class IdentifierInfo;
-  
+class Module;
+
 /// \brief A sequence of identifier/location pairs used to describe a particular
 /// module or submodule, e.g., std.vector.
-typedef llvm::ArrayRef<std::pair<IdentifierInfo*, SourceLocation> > 
-  ModuleIdPath;
-  
+typedef ArrayRef<std::pair<IdentifierInfo *, SourceLocation> > ModuleIdPath;
+
+/// \brief Describes the result of attempting to load a module.
+class ModuleLoadResult {
+  llvm::PointerIntPair<Module *, 1, bool> Storage;
+
+public:
+  ModuleLoadResult() : Storage() { }
+
+  ModuleLoadResult(Module *module, bool missingExpected)
+    : Storage(module, missingExpected) { }
+
+  operator Module *() const { return Storage.getPointer(); }
+
+  /// \brief Determines whether the module, which failed to load, was
+  /// actually a submodule that we expected to see (based on implying the
+  /// submodule from header structure), but didn't materialize in the actual
+  /// module.
+  bool isMissingExpected() const { return Storage.getInt(); }
+};
+
 /// \brief Abstract interface for a module loader.
 ///
 /// This abstract interface describes a module loader, which is responsible
@@ -55,9 +75,16 @@ public:
   ///
   /// \returns If successful, returns the loaded module. Otherwise, returns 
   /// NULL to indicate that the module could not be loaded.
-  virtual Module *loadModule(SourceLocation ImportLoc, ModuleIdPath Path,
-                             Module::NameVisibilityKind Visibility,
-                             bool IsInclusionDirective) = 0;
+  virtual ModuleLoadResult loadModule(SourceLocation ImportLoc,
+                                      ModuleIdPath Path,
+                                      Module::NameVisibilityKind Visibility,
+                                      bool IsInclusionDirective) = 0;
+
+  /// \brief Make the given module visible.
+  virtual void makeModuleVisible(Module *Mod,
+                                 Module::NameVisibilityKind Visibility,
+                                 SourceLocation ImportLoc,
+                                 bool Complain) = 0;
 };
   
 }
diff --git a/include/clang/Lex/ModuleMap.h b/include/clang/Lex/ModuleMap.h
index 082408d..1c9c673 100644
--- a/include/clang/Lex/ModuleMap.h
+++ b/include/clang/Lex/ModuleMap.h
@@ -22,8 +22,8 @@
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
 #include <string>
 
 namespace clang {
@@ -33,6 +33,7 @@ class FileEntry;
 class FileManager;
 class DiagnosticConsumer;
 class DiagnosticsEngine;
+class HeaderSearch;
 class ModuleMapParser;
   
 class ModuleMap {
@@ -40,6 +41,7 @@ class ModuleMap {
   IntrusiveRefCntPtr<DiagnosticsEngine> Diags;
   const LangOptions &LangOpts;
   const TargetInfo *Target;
+  HeaderSearch &HeaderInfo;
   
   /// \brief The directory used for Clang-supplied, builtin include headers,
   /// such as "stdint.h".
@@ -104,13 +106,17 @@ class ModuleMap {
 
     /// \brief The names of modules that cannot be inferred within this
     /// directory.
-    llvm::SmallVector<std::string, 2> ExcludedModules;
+    SmallVector<std::string, 2> ExcludedModules;
   };
 
   /// \brief A mapping from directories to information about inferring
   /// framework modules from within those directories.
   llvm::DenseMap<const DirectoryEntry *, InferredDirectory> InferredDirectories;
 
+  /// \brief Describes whether we haved parsed a particular file as a module
+  /// map.
+  llvm::DenseMap<const FileEntry *, bool> ParsedModuleMap;
+
   friend class ModuleMapParser;
   
   /// \brief Resolve the given export declaration into an actual export
@@ -127,8 +133,21 @@ class ModuleMap {
   /// if the export could not be resolved.
   Module::ExportDecl 
   resolveExport(Module *Mod, const Module::UnresolvedExportDecl &Unresolved,
-                bool Complain);
-  
+                bool Complain) const;
+
+  /// \brief Resolve the given module id to an actual module.
+  ///
+  /// \param Id The module-id to resolve.
+  ///
+  /// \param Mod The module in which we're resolving the module-id.
+  ///
+  /// \param Complain Whether this routine should complain about unresolvable
+  /// module-ids.
+  ///
+  /// \returns The resolved module, or null if the module-id could not be
+  /// resolved.
+  Module *resolveModuleId(const ModuleId &Id, Module *Mod, bool Complain) const;
+
 public:
   /// \brief Construct a new module map.
   ///
@@ -143,7 +162,8 @@ public:
   ///
   /// \param Target The target for this translation unit.
   ModuleMap(FileManager &FileMgr, const DiagnosticConsumer &DC,
-            const LangOptions &LangOpts, const TargetInfo *Target);
+            const LangOptions &LangOpts, const TargetInfo *Target,
+            HeaderSearch &HeaderInfo);
 
   /// \brief Destroy the module map.
   ///
@@ -157,6 +177,7 @@ public:
   void setBuiltinIncludeDir(const DirectoryEntry *Dir) {
     BuiltinIncludeDir = Dir;
   }
+  const DirectoryEntry *getBuiltinIncludeDir() { return BuiltinIncludeDir; }
 
   /// \brief Retrieve the module that owns the given header file, if any.
   ///
@@ -168,14 +189,14 @@ public:
 
   /// \brief Determine whether the given header is part of a module
   /// marked 'unavailable'.
-  bool isHeaderInUnavailableModule(const FileEntry *Header);
+  bool isHeaderInUnavailableModule(const FileEntry *Header) const;
 
   /// \brief Retrieve a module with the given name.
   ///
   /// \param Name The name of the module to look up.
   ///
   /// \returns The named module, if known; otherwise, returns null.
-  Module *findModule(StringRef Name);
+  Module *findModule(StringRef Name) const;
 
   /// \brief Retrieve a module with the given name using lexical name lookup,
   /// starting at the given context.
@@ -186,7 +207,7 @@ public:
   /// name lookup.
   ///
   /// \returns The named module, if known; otherwise, returns null.
-  Module *lookupModuleUnqualified(StringRef Name, Module *Context);
+  Module *lookupModuleUnqualified(StringRef Name, Module *Context) const;
 
   /// \brief Retrieve a module with the given name within the given context,
   /// using direct (qualified) name lookup.
@@ -197,7 +218,7 @@ public:
   /// null, we will look for a top-level module.
   ///
   /// \returns The named submodule, if known; otherwose, returns null.
-  Module *lookupModuleQualified(StringRef Name, Module *Context);
+  Module *lookupModuleQualified(StringRef Name, Module *Context) const;
   
   /// \brief Find a new module or submodule, or create it if it does not already
   /// exist.
@@ -231,7 +252,7 @@ public:
   /// \returns true if we are allowed to infer a framework module, and false
   /// otherwise.
   bool canInferFrameworkModule(const DirectoryEntry *ParentDir,
-                               StringRef Name, bool &IsSystem);
+                               StringRef Name, bool &IsSystem) const;
 
   /// \brief Infer the contents of a framework module map from the given
   /// framework directory.
@@ -246,7 +267,7 @@ public:
   ///
   /// \returns The file entry for the module map file containing the given
   /// module, or NULL if the module definition was inferred.
-  const FileEntry *getContainingModuleMapFile(Module *Module);
+  const FileEntry *getContainingModuleMapFile(Module *Module) const;
 
   /// \brief Resolve all of the unresolved exports in the given module.
   ///
@@ -258,7 +279,17 @@ public:
   /// false otherwise.
   bool resolveExports(Module *Mod, bool Complain);
 
-  /// \brief Infers the (sub)module based on the given source location and 
+  /// \brief Resolve all of the unresolved conflicts in the given module.
+  ///
+  /// \param Mod The module whose conflicts should be resolved.
+  ///
+  /// \param Complain Whether to emit diagnostics for failures.
+  ///
+  /// \returns true if any errors were encountered while resolving conflicts,
+  /// false otherwise.
+  bool resolveConflicts(Module *Mod, bool Complain);
+
+  /// \brief Infers the (sub)module based on the given source location and
   /// source manager.
   ///
   /// \param Loc The location within the source that we are querying, along
diff --git a/include/clang/Lex/PPCallbacks.h b/include/clang/Lex/PPCallbacks.h
index 8ba02cc..96359a2 100644
--- a/include/clang/Lex/PPCallbacks.h
+++ b/include/clang/Lex/PPCallbacks.h
@@ -15,10 +15,10 @@
 #ifndef LLVM_CLANG_LEX_PPCALLBACKS_H
 #define LLVM_CLANG_LEX_PPCALLBACKS_H
 
+#include "clang/Basic/DiagnosticIDs.h"
+#include "clang/Basic/SourceLocation.h"
 #include "clang/Lex/DirectoryLookup.h"
 #include "clang/Lex/ModuleLoader.h"
-#include "clang/Basic/SourceLocation.h"
-#include "clang/Basic/DiagnosticIDs.h"
 #include "llvm/ADT/StringRef.h"
 #include <string>
 
@@ -26,7 +26,7 @@ namespace clang {
   class SourceLocation;
   class Token;
   class IdentifierInfo;
-  class MacroInfo;
+  class MacroDirective;
 
 /// \brief This interface provides a way to observe the actions of the
 /// preprocessor as it does its thing.
@@ -184,22 +184,25 @@ public:
 
   /// \brief Called by Preprocessor::HandleMacroExpandedIdentifier when a
   /// macro invocation is found.
-  virtual void MacroExpands(const Token &MacroNameTok, const MacroInfo* MI,
+  virtual void MacroExpands(const Token &MacroNameTok, const MacroDirective *MD,
                             SourceRange Range) {
   }
 
   /// \brief Hook called whenever a macro definition is seen.
-  virtual void MacroDefined(const Token &MacroNameTok, const MacroInfo *MI) {
+  virtual void MacroDefined(const Token &MacroNameTok,
+                            const MacroDirective *MD) {
   }
 
   /// \brief Hook called whenever a macro \#undef is seen.
   ///
-  /// MI is released immediately following this callback.
-  virtual void MacroUndefined(const Token &MacroNameTok, const MacroInfo *MI) {
+  /// MD is released immediately following this callback.
+  virtual void MacroUndefined(const Token &MacroNameTok,
+                              const MacroDirective *MD) {
   }
   
   /// \brief Hook called whenever the 'defined' operator is seen.
-  virtual void Defined(const Token &MacroNameTok) {
+  /// \param MD The MacroDirective if the name was a macro, null otherwise.
+  virtual void Defined(const Token &MacroNameTok, const MacroDirective *MD) {
   }
   
   /// \brief Hook called when a source range is skipped.
@@ -228,13 +231,17 @@ public:
   /// \brief Hook called whenever an \#ifdef is seen.
   /// \param Loc the source location of the directive.
   /// \param MacroNameTok Information on the token being tested.
-  virtual void Ifdef(SourceLocation Loc, const Token &MacroNameTok) {
+  /// \param MD The MacroDirective if the name was a macro, null otherwise.
+  virtual void Ifdef(SourceLocation Loc, const Token &MacroNameTok,
+                     const MacroDirective *MD) {
   }
 
   /// \brief Hook called whenever an \#ifndef is seen.
   /// \param Loc the source location of the directive.
   /// \param MacroNameTok Information on the token being tested.
-  virtual void Ifndef(SourceLocation Loc, const Token &MacroNameTok) {
+  /// \param MD The MacroDirective if the name was a macro, null otherwise.
+  virtual void Ifndef(SourceLocation Loc, const Token &MacroNameTok,
+                      const MacroDirective *MD) {
   }
 
   /// \brief Hook called whenever an \#else is seen.
@@ -346,25 +353,26 @@ public:
     Second->PragmaDiagnostic(Loc, Namespace, mapping, Str);
   }
 
-  virtual void MacroExpands(const Token &MacroNameTok, const MacroInfo* MI,
+  virtual void MacroExpands(const Token &MacroNameTok, const MacroDirective *MD,
                             SourceRange Range) {
-    First->MacroExpands(MacroNameTok, MI, Range);
-    Second->MacroExpands(MacroNameTok, MI, Range);
+    First->MacroExpands(MacroNameTok, MD, Range);
+    Second->MacroExpands(MacroNameTok, MD, Range);
   }
 
-  virtual void MacroDefined(const Token &MacroNameTok, const MacroInfo *MI) {
-    First->MacroDefined(MacroNameTok, MI);
-    Second->MacroDefined(MacroNameTok, MI);
+  virtual void MacroDefined(const Token &MacroNameTok, const MacroDirective *MD) {
+    First->MacroDefined(MacroNameTok, MD);
+    Second->MacroDefined(MacroNameTok, MD);
   }
 
-  virtual void MacroUndefined(const Token &MacroNameTok, const MacroInfo *MI) {
-    First->MacroUndefined(MacroNameTok, MI);
-    Second->MacroUndefined(MacroNameTok, MI);
+  virtual void MacroUndefined(const Token &MacroNameTok,
+                              const MacroDirective *MD) {
+    First->MacroUndefined(MacroNameTok, MD);
+    Second->MacroUndefined(MacroNameTok, MD);
   }
 
-  virtual void Defined(const Token &MacroNameTok) {
-    First->Defined(MacroNameTok);
-    Second->Defined(MacroNameTok);
+  virtual void Defined(const Token &MacroNameTok, const MacroDirective *MD) {
+    First->Defined(MacroNameTok, MD);
+    Second->Defined(MacroNameTok, MD);
   }
 
   virtual void SourceRangeSkipped(SourceRange Range) {
@@ -386,15 +394,17 @@ public:
   }
 
   /// \brief Hook called whenever an \#ifdef is seen.
-  virtual void Ifdef(SourceLocation Loc, const Token &MacroNameTok) {
-    First->Ifdef(Loc, MacroNameTok);
-    Second->Ifdef(Loc, MacroNameTok);
+  virtual void Ifdef(SourceLocation Loc, const Token &MacroNameTok,
+                     const MacroDirective *MD) {
+    First->Ifdef(Loc, MacroNameTok, MD);
+    Second->Ifdef(Loc, MacroNameTok, MD);
   }
 
   /// \brief Hook called whenever an \#ifndef is seen.
-  virtual void Ifndef(SourceLocation Loc, const Token &MacroNameTok) {
-    First->Ifndef(Loc, MacroNameTok);
-    Second->Ifndef(Loc, MacroNameTok);
+  virtual void Ifndef(SourceLocation Loc, const Token &MacroNameTok,
+                      const MacroDirective *MD) {
+    First->Ifndef(Loc, MacroNameTok, MD);
+    Second->Ifndef(Loc, MacroNameTok, MD);
   }
 
   /// \brief Hook called whenever an \#else is seen.
diff --git a/include/clang/Lex/PPConditionalDirectiveRecord.h b/include/clang/Lex/PPConditionalDirectiveRecord.h
new file mode 100644
index 0000000..b9a2252
--- /dev/null
+++ b/include/clang/Lex/PPConditionalDirectiveRecord.h
@@ -0,0 +1,102 @@
+//===--- PPConditionalDirectiveRecord.h - Preprocessing Directives-*- C++ -*-=//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file defines the PPConditionalDirectiveRecord class, which maintains
+//  a record of conditional directive regions.
+//
+//===----------------------------------------------------------------------===//
+#ifndef LLVM_CLANG_LEX_PPCONDITIONALDIRECTIVERECORD_H
+#define LLVM_CLANG_LEX_PPCONDITIONALDIRECTIVERECORD_H
+
+#include "clang/Basic/SourceLocation.h"
+#include "clang/Lex/PPCallbacks.h"
+#include "llvm/ADT/SmallVector.h"
+#include <vector>
+
+namespace clang {
+  
+/// \brief Records preprocessor conditional directive regions and allows
+/// querying in which region source locations belong to.
+class PPConditionalDirectiveRecord : public PPCallbacks {
+  SourceManager &SourceMgr;
+  
+  SmallVector<SourceLocation, 6> CondDirectiveStack;
+
+  class CondDirectiveLoc {
+    SourceLocation Loc;
+    SourceLocation RegionLoc;
+
+  public:
+    CondDirectiveLoc(SourceLocation Loc, SourceLocation RegionLoc)
+      : Loc(Loc), RegionLoc(RegionLoc) {}
+
+    SourceLocation getLoc() const { return Loc; }
+    SourceLocation getRegionLoc() const { return RegionLoc; }
+
+    class Comp {
+      SourceManager &SM;
+    public:
+      explicit Comp(SourceManager &SM) : SM(SM) {}
+      bool operator()(const CondDirectiveLoc &LHS,
+                      const CondDirectiveLoc &RHS) {
+        return SM.isBeforeInTranslationUnit(LHS.getLoc(), RHS.getLoc());
+      }
+      bool operator()(const CondDirectiveLoc &LHS, SourceLocation RHS) {
+        return SM.isBeforeInTranslationUnit(LHS.getLoc(), RHS);
+      }
+      bool operator()(SourceLocation LHS, const CondDirectiveLoc &RHS) {
+        return SM.isBeforeInTranslationUnit(LHS, RHS.getLoc());
+      }
+    };
+  };
+
+  typedef std::vector<CondDirectiveLoc> CondDirectiveLocsTy;
+  /// \brief The locations of conditional directives in source order.
+  CondDirectiveLocsTy CondDirectiveLocs;
+
+  void addCondDirectiveLoc(CondDirectiveLoc DirLoc);
+
+public:
+  /// \brief Construct a new preprocessing record.
+  explicit PPConditionalDirectiveRecord(SourceManager &SM);
+
+  size_t getTotalMemory() const;
+
+  SourceManager &getSourceManager() const { return SourceMgr; }
+
+  /// \brief Returns true if the given range intersects with a conditional
+  /// directive. if a \#if/\#endif block is fully contained within the range,
+  /// this function will return false.
+  bool rangeIntersectsConditionalDirective(SourceRange Range) const;
+
+  /// \brief Returns true if the given locations are in different regions,
+  /// separated by conditional directive blocks.
+  bool areInDifferentConditionalDirectiveRegion(SourceLocation LHS,
+                                                SourceLocation RHS) const {
+    return findConditionalDirectiveRegionLoc(LHS) !=
+        findConditionalDirectiveRegionLoc(RHS);
+  }
+
+  SourceLocation findConditionalDirectiveRegionLoc(SourceLocation Loc) const;
+
+private:
+  virtual void If(SourceLocation Loc, SourceRange ConditionRange);
+  virtual void Elif(SourceLocation Loc, SourceRange ConditionRange,
+                    SourceLocation IfLoc);
+  virtual void Ifdef(SourceLocation Loc, const Token &MacroNameTok,
+                     const MacroDirective *MD);
+  virtual void Ifndef(SourceLocation Loc, const Token &MacroNameTok,
+                      const MacroDirective *MD);
+  virtual void Else(SourceLocation Loc, SourceLocation IfLoc);
+  virtual void Endif(SourceLocation Loc, SourceLocation IfLoc);
+};
+
+} // end namespace clang
+
+#endif // LLVM_CLANG_LEX_PPCONDITIONALDIRECTIVERECORD_H
diff --git a/include/clang/Lex/PPMutationListener.h b/include/clang/Lex/PPMutationListener.h
deleted file mode 100644
index 5319c66..0000000
--- a/include/clang/Lex/PPMutationListener.h
+++ /dev/null
@@ -1,43 +0,0 @@
-//===--- PPMutationListener.h - Preprocessor Mutation Interface -*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-//  This file defines the PPMutationListener interface.
-//
-//===----------------------------------------------------------------------===//
-#ifndef LLVM_CLANG_LEX_PPTMUTATIONLISTENER_H
-#define LLVM_CLANG_LEX_PPTMUTATIONLISTENER_H
-
-#include "clang/Basic/SourceLocation.h"
-
-namespace clang {
-
-class MacroInfo;
-
-/// \brief A record that describes an update to a macro that was
-/// originally loaded to an AST file and has been modified within the
-/// current translation unit.
-struct MacroUpdate {
-  /// \brief The source location at which this macro was #undef'd.
-  SourceLocation UndefLoc;
-};
-
-/// \brief An abstract interface that should be implemented by
-/// listeners that want to be notified when a preprocessor entity gets
-/// modified after its initial creation.
-class PPMutationListener {
-public:
-  virtual ~PPMutationListener();
-
-  /// \brief A macro has been #undef'd.
-  virtual void UndefinedMacro(MacroInfo *MI) { }
-};
-
-} // end namespace clang
-
-#endif
diff --git a/include/clang/Lex/PTHManager.h b/include/clang/Lex/PTHManager.h
index e64dbd8..fad0806 100644
--- a/include/clang/Lex/PTHManager.h
+++ b/include/clang/Lex/PTHManager.h
@@ -14,10 +14,10 @@
 #ifndef LLVM_CLANG_PTHMANAGER_H
 #define LLVM_CLANG_PTHMANAGER_H
 
-#include "clang/Lex/PTHLexer.h"
-#include "clang/Basic/LangOptions.h"
-#include "clang/Basic/IdentifierTable.h"
 #include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/IdentifierTable.h"
+#include "clang/Basic/LangOptions.h"
+#include "clang/Lex/PTHLexer.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/Support/Allocator.h"
 #include <string>
diff --git a/include/clang/Lex/PreprocessingRecord.h b/include/clang/Lex/PreprocessingRecord.h
index 57e51b7..b13b2be 100644
--- a/include/clang/Lex/PreprocessingRecord.h
+++ b/include/clang/Lex/PreprocessingRecord.h
@@ -14,18 +14,19 @@
 #ifndef LLVM_CLANG_LEX_PREPROCESSINGRECORD_H
 #define LLVM_CLANG_LEX_PREPROCESSINGRECORD_H
 
-#include "clang/Lex/PPCallbacks.h"
-#include "clang/Basic/SourceLocation.h"
 #include "clang/Basic/IdentifierTable.h"
-#include "llvm/ADT/SmallVector.h"
+#include "clang/Basic/SourceLocation.h"
+#include "clang/Lex/PPCallbacks.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/Optional.h"
+#include "llvm/ADT/SmallVector.h"
 #include "llvm/Support/Allocator.h"
 #include "llvm/Support/Compiler.h"
 #include <vector>
 
 namespace clang {
   class IdentifierInfo;
+  class MacroInfo;
   class PreprocessingRecord;
 }
 
@@ -277,9 +278,9 @@ namespace clang {
 
     /// \brief Optionally returns true or false if the preallocated preprocessed
     /// entity with index \p Index came from file \p FID.
-    virtual llvm::Optional<bool> isPreprocessedEntityInFileID(unsigned Index,
-                                                              FileID FID) {
-      return llvm::Optional<bool>();
+    virtual Optional<bool> isPreprocessedEntityInFileID(unsigned Index,
+                                                        FileID FID) {
+      return None;
     }
   };
   
@@ -303,44 +304,6 @@ namespace clang {
     /// and are referenced by the iterator using negative indices.
     std::vector<PreprocessedEntity *> LoadedPreprocessedEntities;
 
-    bool RecordCondDirectives;
-    unsigned CondDirectiveNextIdx;
-    SmallVector<unsigned, 6> CondDirectiveStack; 
-
-    class CondDirectiveLoc {
-      SourceLocation Loc;
-      unsigned Idx;
-
-    public:
-      CondDirectiveLoc(SourceLocation Loc, unsigned Idx) : Loc(Loc), Idx(Idx) {}
-
-      SourceLocation getLoc() const { return Loc; }
-      unsigned getIdx() const { return Idx; }
-
-      class Comp {
-        SourceManager &SM;
-      public:
-        explicit Comp(SourceManager &SM) : SM(SM) {}
-        bool operator()(const CondDirectiveLoc &LHS,
-                        const CondDirectiveLoc &RHS) {
-          return SM.isBeforeInTranslationUnit(LHS.getLoc(), RHS.getLoc());
-        }
-        bool operator()(const CondDirectiveLoc &LHS, SourceLocation RHS) {
-          return SM.isBeforeInTranslationUnit(LHS.getLoc(), RHS);
-        }
-        bool operator()(SourceLocation LHS, const CondDirectiveLoc &RHS) {
-          return SM.isBeforeInTranslationUnit(LHS, RHS.getLoc());
-        }
-      };
-    };
-
-    typedef std::vector<CondDirectiveLoc> CondDirectiveLocsTy; 
-    /// \brief The locations of conditional directives in source order.
-    CondDirectiveLocsTy CondDirectiveLocs;
-
-    void addCondDirectiveLoc(CondDirectiveLoc DirLoc);
-    unsigned findCondDirectiveIdx(SourceLocation Loc) const;
-
     /// \brief Global (loaded or local) ID for a preprocessed entity.
     /// Negative values are used to indicate preprocessed entities
     /// loaded from the external source while non-negative values are used to
@@ -363,7 +326,7 @@ namespace clang {
     }
 
     /// \brief Mapping from MacroInfo structures to their definitions.
-    llvm::DenseMap<const MacroInfo *, PPEntityID> MacroDefinitions;
+    llvm::DenseMap<const MacroInfo *, MacroDefinition *> MacroDefinitions;
 
     /// \brief External source of preprocessed entities.
     ExternalPreprocessingRecordSource *ExternalSource;
@@ -394,11 +357,11 @@ namespace clang {
     unsigned allocateLoadedEntities(unsigned NumEntities);
 
     /// \brief Register a new macro definition.
-    void RegisterMacroDefinition(MacroInfo *Macro, PPEntityID PPID);
+    void RegisterMacroDefinition(MacroInfo *Macro, MacroDefinition *Def);
     
   public:
     /// \brief Construct a new preprocessing record.
-    PreprocessingRecord(SourceManager &SM, bool RecordConditionalDirectives);
+    explicit PreprocessingRecord(SourceManager &SM);
     
     /// \brief Allocate memory in the preprocessing record.
     void *Allocate(unsigned Size, unsigned Align = 8) {
@@ -582,24 +545,6 @@ namespace clang {
     /// \brief Add a new preprocessed entity to this record.
     PPEntityID addPreprocessedEntity(PreprocessedEntity *Entity);
 
-    /// \brief Returns true if this PreprocessingRecord is keeping track of
-    /// conditional directives locations.
-    bool isRecordingConditionalDirectives() const {
-      return RecordCondDirectives;
-    }
-
-    /// \brief Returns true if the given range intersects with a conditional
-    /// directive. if a \#if/\#endif block is fully contained within the range,
-    /// this function will return false.
-    bool rangeIntersectsConditionalDirective(SourceRange Range) const;
-
-    /// \brief Returns true if the given locations are in different regions,
-    /// separated by conditional directive blocks.
-    bool areInDifferentConditionalDirectiveRegion(SourceLocation LHS,
-                                                  SourceLocation RHS) const {
-      return findCondDirectiveIdx(LHS) != findCondDirectiveIdx(RHS);
-    }
-
     /// \brief Set the external source for preprocessed entities.
     void SetExternalSource(ExternalPreprocessingRecordSource &Source);
 
@@ -613,10 +558,10 @@ namespace clang {
     MacroDefinition *findMacroDefinition(const MacroInfo *MI);
         
   private:
-    virtual void MacroExpands(const Token &Id, const MacroInfo* MI,
+    virtual void MacroExpands(const Token &Id, const MacroDirective *MD,
                               SourceRange Range);
-    virtual void MacroDefined(const Token &Id, const MacroInfo *MI);
-    virtual void MacroUndefined(const Token &Id, const MacroInfo *MI);
+    virtual void MacroDefined(const Token &Id, const MacroDirective *MD);
+    virtual void MacroUndefined(const Token &Id, const MacroDirective *MD);
     virtual void InclusionDirective(SourceLocation HashLoc,
                                     const Token &IncludeTok,
                                     StringRef FileName,
@@ -626,13 +571,15 @@ namespace clang {
                                     StringRef SearchPath,
                                     StringRef RelativePath,
                                     const Module *Imported);
-    virtual void If(SourceLocation Loc, SourceRange ConditionRange);
-    virtual void Elif(SourceLocation Loc, SourceRange ConditionRange,
-                      SourceLocation IfLoc);
-    virtual void Ifdef(SourceLocation Loc, const Token &MacroNameTok);
-    virtual void Ifndef(SourceLocation Loc, const Token &MacroNameTok);
-    virtual void Else(SourceLocation Loc, SourceLocation IfLoc);
-    virtual void Endif(SourceLocation Loc, SourceLocation IfLoc);
+    virtual void Ifdef(SourceLocation Loc, const Token &MacroNameTok,
+                       const MacroDirective *MD);
+    virtual void Ifndef(SourceLocation Loc, const Token &MacroNameTok,
+                        const MacroDirective *MD);
+    /// \brief Hook called whenever the 'defined' operator is seen.
+    virtual void Defined(const Token &MacroNameTok, const MacroDirective *MD);
+
+    void addMacroExpansion(const Token &Id, const MacroInfo *MI,
+                           SourceRange Range);
 
     /// \brief Cached result of the last \see getPreprocessedEntitiesInRange
     /// query.
diff --git a/include/clang/Lex/Preprocessor.h b/include/clang/Lex/Preprocessor.h
index e9095fb..7a912ec 100644
--- a/include/clang/Lex/Preprocessor.h
+++ b/include/clang/Lex/Preprocessor.h
@@ -14,23 +14,22 @@
 #ifndef LLVM_CLANG_LEX_PREPROCESSOR_H
 #define LLVM_CLANG_LEX_PREPROCESSOR_H
 
-#include "clang/Lex/MacroInfo.h"
-#include "clang/Lex/Lexer.h"
-#include "clang/Lex/PTHLexer.h"
-#include "clang/Lex/PPCallbacks.h"
-#include "clang/Lex/PPMutationListener.h"
-#include "clang/Lex/TokenLexer.h"
-#include "clang/Lex/PTHManager.h"
 #include "clang/Basic/Builtins.h"
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/IdentifierTable.h"
 #include "clang/Basic/SourceLocation.h"
+#include "clang/Lex/Lexer.h"
+#include "clang/Lex/MacroInfo.h"
+#include "clang/Lex/PPCallbacks.h"
+#include "clang/Lex/PTHLexer.h"
+#include "clang/Lex/PTHManager.h"
+#include "clang/Lex/TokenLexer.h"
+#include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
-#include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallVector.h"
-#include "llvm/ADT/ArrayRef.h"
 #include "llvm/Support/Allocator.h"
 #include <vector>
 
@@ -84,7 +83,7 @@ public:
 /// like the \#include stack, token expansion, etc.
 ///
 class Preprocessor : public RefCountedBase<Preprocessor> {
-  llvm::IntrusiveRefCntPtr<PreprocessorOptions> PPOpts;
+  IntrusiveRefCntPtr<PreprocessorOptions> PPOpts;
   DiagnosticsEngine        *Diags;
   LangOptions       &LangOpts;
   const TargetInfo  *Target;
@@ -160,6 +159,12 @@ class Preprocessor : public RefCountedBase<Preprocessor> {
   /// \brief True if pragmas are enabled.
   bool PragmasEnabled : 1;
 
+  /// \brief True if the current build action is a preprocessing action.
+  bool PreprocessedOutput : 1;
+
+  /// \brief True if we are currently preprocessing a #if or #elif directive
+  bool ParsingIfOrElifDirective;
+
   /// \brief True if we are pre-expanding macro arguments.
   bool InMacroArgPreExpansion;
 
@@ -215,8 +220,7 @@ class Preprocessor : public RefCountedBase<Preprocessor> {
   SourceLocation ModuleImportLoc;
 
   /// \brief The module import path that we're currently processing.
-  llvm::SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 2> 
-    ModuleImportPath;
+  SmallVector<std::pair<IdentifierInfo *, SourceLocation>, 2> ModuleImportPath;
   
   /// \brief Whether the module import expectes an identifier next. Otherwise,
   /// it expects a '.' or ';'.
@@ -291,24 +295,19 @@ class Preprocessor : public RefCountedBase<Preprocessor> {
   /// encountered (e.g. a file is \#included, etc).
   PPCallbacks *Callbacks;
 
-  /// \brief Listener whose actions are invoked when an entity in the
-  /// preprocessor (e.g., a macro) that was loaded from an AST file is
-  /// later mutated.
-  PPMutationListener *Listener;
-
   struct MacroExpandsInfo {
     Token Tok;
-    MacroInfo *MI;
+    MacroDirective *MD;
     SourceRange Range;
-    MacroExpandsInfo(Token Tok, MacroInfo *MI, SourceRange Range)
-      : Tok(Tok), MI(MI), Range(Range) { }
+    MacroExpandsInfo(Token Tok, MacroDirective *MD, SourceRange Range)
+      : Tok(Tok), MD(MD), Range(Range) { }
   };
   SmallVector<MacroExpandsInfo, 2> DelayedMacroExpandsCallbacks;
 
   /// Macros - For each IdentifierInfo that was associated with a macro, we
   /// keep a mapping to the history of all macro definitions and #undefs in
   /// the reverse order (the latest one is in the head of the list).
-  llvm::DenseMap<IdentifierInfo*, MacroInfo*> Macros;
+  llvm::DenseMap<const IdentifierInfo*, MacroDirective*> Macros;
   friend class ASTReader;
   
   /// \brief Macros that we want to warn because they are not used at the end
@@ -343,6 +342,9 @@ class Preprocessor : public RefCountedBase<Preprocessor> {
   /// should use from the command line etc.
   std::string Predefines;
 
+  /// \brief The file ID for the preprocessor predefines.
+  FileID PredefinesFileID;
+
   /// TokenLexerCache - Cache macro expanders to reduce malloc traffic.
   enum { TokenLexerCacheSize = 8 };
   unsigned NumCachedTokenLexers;
@@ -396,7 +398,7 @@ private:  // Cached tokens state.
   MacroInfoChain *MICache;
 
 public:
-  Preprocessor(llvm::IntrusiveRefCntPtr<PreprocessorOptions> PPOpts,
+  Preprocessor(IntrusiveRefCntPtr<PreprocessorOptions> PPOpts,
                DiagnosticsEngine &diags, LangOptions &opts,
                const TargetInfo *target,
                SourceManager &SM, HeaderSearch &Headers,
@@ -447,6 +449,11 @@ public:
   /// \brief Retrieve the module loader associated with this preprocessor.
   ModuleLoader &getModuleLoader() const { return TheModuleLoader; }
 
+  /// \brief True if we are currently preprocessing a #if or #elif directive
+  bool isParsingIfOrElifDirective() const { 
+    return ParsingIfOrElifDirective;
+  }
+
   /// SetCommentRetentionState - Control whether or not the preprocessor retains
   /// comments in output.
   void SetCommentRetentionState(bool KeepComments, bool KeepMacroComments) {
@@ -467,6 +474,16 @@ public:
     return SuppressIncludeNotFoundError;
   }
 
+  /// Sets whether the preprocessor is responsible for producing output or if
+  /// it is producing tokens to be consumed by Parse and Sema.
+  void setPreprocessedOutput(bool IsPreprocessedOutput) {
+    PreprocessedOutput = IsPreprocessedOutput;
+  }
+
+  /// Returns true if the preprocessor is responsible for generating output,
+  /// false if it is producing tokens to be consumed by Parse and Sema.
+  bool isPreprocessedOutput() const { return PreprocessedOutput; }
+
   /// isCurrentLexer - Return true if we are lexing directly from the specified
   /// lexer.
   bool isCurrentLexer(const PreprocessorLexer *L) const {
@@ -483,6 +500,9 @@ public:
   /// expansions going on at the time.
   PreprocessorLexer *getCurrentFileLexer() const;
 
+  /// \brief Returns the file ID for the preprocessor predefines.
+  FileID getPredefinesFileID() const { return PredefinesFileID; }
+
   /// getPPCallbacks/addPPCallbacks - Accessors for preprocessor callbacks.
   /// Note that this class takes ownership of any PPCallbacks object given to
   /// it.
@@ -493,53 +513,54 @@ public:
     Callbacks = C;
   }
 
-  /// \brief Attach an preprocessor mutation listener to the preprocessor.
-  ///
-  /// The preprocessor mutation listener provides the ability to track
-  /// modifications to the preprocessor entities committed after they were
-  /// initially created.
-  void setPPMutationListener(PPMutationListener *Listener) {
-    this->Listener = Listener;
-  }
-
-  /// \brief Retrieve a pointer to the preprocessor mutation listener
-  /// associated with this preprocessor, if any.
-  PPMutationListener *getPPMutationListener() const { return Listener; }
-
-  /// \brief Given an identifier, return the MacroInfo it is \#defined to
-  /// or null if it isn't \#define'd.
-  MacroInfo *getMacroInfo(IdentifierInfo *II) const {
+  /// \brief Given an identifier, return its latest MacroDirective if it is
+  // \#defined or null if it isn't \#define'd.
+  MacroDirective *getMacroDirective(IdentifierInfo *II) const {
     if (!II->hasMacroDefinition())
       return 0;
 
-    MacroInfo *MI = getMacroInfoHistory(II);
-    assert(MI->getUndefLoc().isInvalid() && "Macro is undefined!");
-    return MI;
+    MacroDirective *MD = getMacroDirectiveHistory(II);
+    assert(MD->isDefined() && "Macro is undefined!");
+    return MD;
+  }
+
+  const MacroInfo *getMacroInfo(IdentifierInfo *II) const {
+    return const_cast<Preprocessor*>(this)->getMacroInfo(II);
+  }
+
+  MacroInfo *getMacroInfo(IdentifierInfo *II) {
+    if (MacroDirective *MD = getMacroDirective(II))
+      return MD->getMacroInfo();
+    return 0;
   }
 
   /// \brief Given an identifier, return the (probably #undef'd) MacroInfo
   /// representing the most recent macro definition. One can iterate over all
   /// previous macro definitions from it. This method should only be called for
   /// identifiers that hadMacroDefinition().
-  MacroInfo *getMacroInfoHistory(IdentifierInfo *II) const;
-
-  /// \brief Specify a macro for this identifier.
-  void setMacroInfo(IdentifierInfo *II, MacroInfo *MI);
-  /// \brief Add a MacroInfo that was loaded from an AST file.
-  void addLoadedMacroInfo(IdentifierInfo *II, MacroInfo *MI,
-                          MacroInfo *Hint = 0);
-  /// \brief Make the given MacroInfo, that was loaded from an AST file and
-  /// previously hidden, visible.
-  void makeLoadedMacroInfoVisible(IdentifierInfo *II, MacroInfo *MI);
-  /// \brief Undefine a macro for this identifier.
-  void clearMacroInfo(IdentifierInfo *II);
+  MacroDirective *getMacroDirectiveHistory(const IdentifierInfo *II) const;
+
+  /// \brief Add a directive to the macro directive history for this identifier.
+  void appendMacroDirective(IdentifierInfo *II, MacroDirective *MD);
+  DefMacroDirective *appendDefMacroDirective(IdentifierInfo *II, MacroInfo *MI,
+                                             SourceLocation Loc,
+                                             bool isImported) {
+    DefMacroDirective *MD = AllocateDefMacroDirective(MI, Loc, isImported);
+    appendMacroDirective(II, MD);
+    return MD;
+  }
+  DefMacroDirective *appendDefMacroDirective(IdentifierInfo *II, MacroInfo *MI){
+    return appendDefMacroDirective(II, MI, MI->getDefinitionLoc(), false);
+  }
+  /// \brief Set a MacroDirective that was loaded from a PCH file.
+  void setLoadedMacroDirective(IdentifierInfo *II, MacroDirective *MD);
 
   /// macro_iterator/macro_begin/macro_end - This allows you to walk the macro
   /// history table. Currently defined macros have
   /// IdentifierInfo::hasMacroDefinition() set and an empty
   /// MacroInfo::getUndefLoc() at the head of the list.
-  typedef llvm::DenseMap<IdentifierInfo*,
-                         MacroInfo*>::const_iterator macro_iterator;
+  typedef llvm::DenseMap<const IdentifierInfo *,
+                         MacroDirective*>::const_iterator macro_iterator;
   macro_iterator macro_begin(bool IncludeExternalMacros = true) const;
   macro_iterator macro_end(bool IncludeExternalMacros = true) const;
 
@@ -611,7 +632,7 @@ public:
 
   /// \brief Create a new preprocessing record, which will keep track of
   /// all macro expansions, macro definitions, etc.
-  void createPreprocessingRecord(bool RecordConditionalDirectives);
+  void createPreprocessingRecord();
 
   /// EnterMainSourceFile - Enter the specified FileID as the main source file,
   /// which implicitly adds the builtin defines etc.
@@ -696,6 +717,25 @@ public:
 
   void LexAfterModuleImport(Token &Result);
 
+  /// \brief Lex a string literal, which may be the concatenation of multiple
+  /// string literals and may even come from macro expansion.
+  /// \returns true on success, false if a error diagnostic has been generated.
+  bool LexStringLiteral(Token &Result, std::string &String,
+                        const char *DiagnosticTag, bool AllowMacroExpansion) {
+    if (AllowMacroExpansion)
+      Lex(Result);
+    else
+      LexUnexpandedToken(Result);
+    return FinishLexStringLiteral(Result, String, DiagnosticTag,
+                                  AllowMacroExpansion);
+  }
+
+  /// \brief Complete the lexing of a string literal where the first token has
+  /// already been lexed (see LexStringLiteral).
+  bool FinishLexStringLiteral(Token &Result, std::string &String,
+                              const char *DiagnosticTag,
+                              bool AllowMacroExpansion);
+
   /// LexNonComment - Lex a token.  If it's a comment, keep lexing until we get
   /// something not a comment.  This is useful in -E -C mode where comments
   /// would foul up preprocessor directive handling.
@@ -901,8 +941,8 @@ public:
   ///   "cleaning", e.g. if it contains trigraphs or escaped newlines
   /// \param invalid If non-null, will be set \c true if an error occurs.
   StringRef getSpelling(SourceLocation loc,
-                              SmallVectorImpl<char> &buffer,
-                              bool *invalid = 0) const {
+                        SmallVectorImpl<char> &buffer,
+                        bool *invalid = 0) const {
     return Lexer::getSpelling(loc, buffer, SourceMgr, LangOpts, invalid);
   }
 
@@ -939,6 +979,12 @@ public:
                         SmallVectorImpl<char> &Buffer,
                         bool *Invalid = 0) const;
 
+  /// \brief Relex the token at the specified location.
+  /// \returns true if there was a failure, false on success.
+  bool getRawToken(SourceLocation Loc, Token &Result) {
+    return Lexer::getRawToken(Loc, Result, SourceMgr, LangOpts);
+  }
+
   /// getSpellingOfSingleCharacterNumericConstant - Tok is a numeric constant
   /// with length 1, return the character.
   char getSpellingOfSingleCharacterNumericConstant(const Token &Tok,
@@ -1143,8 +1189,9 @@ public:
   /// \brief Allocate a new MacroInfo object with the provided SourceLocation.
   MacroInfo *AllocateMacroInfo(SourceLocation L);
 
-  /// \brief Allocate a new MacroInfo object which is clone of \p MI.
-  MacroInfo *CloneMacroInfo(const MacroInfo &MI);
+  /// \brief Allocate a new MacroInfo object loaded from an AST file.
+  MacroInfo *AllocateDeserializedMacroInfo(SourceLocation L,
+                                           unsigned SubModuleID);
 
   /// \brief Turn the specified lexer token into a fully checked and spelled
   /// filename, e.g. as an operand of \#include. 
@@ -1221,6 +1268,13 @@ private:
   /// \brief Allocate a new MacroInfo object.
   MacroInfo *AllocateMacroInfo();
 
+  DefMacroDirective *AllocateDefMacroDirective(MacroInfo *MI,
+                                               SourceLocation Loc,
+                                               bool isImported);
+  UndefMacroDirective *AllocateUndefMacroDirective(SourceLocation UndefLoc);
+  VisibilityMacroDirective *AllocateVisibilityMacroDirective(SourceLocation Loc,
+                                                             bool isPublic);
+
   /// \brief Release the specified MacroInfo for re-use.
   ///
   /// This memory will  be reused for allocating new MacroInfo objects.
@@ -1268,7 +1322,7 @@ private:
   /// HandleMacroExpandedIdentifier - If an identifier token is read that is to
   /// be expanded as a macro, handle it and return the next token as 'Tok'.  If
   /// the macro should not be expanded return true, otherwise return false.
-  bool HandleMacroExpandedIdentifier(Token &Tok, MacroInfo *MI);
+  bool HandleMacroExpandedIdentifier(Token &Tok, MacroDirective *MD);
 
   /// \brief Cache macro expanded tokens for TokenLexers.
   //
@@ -1312,6 +1366,12 @@ private:
   /// start getting tokens from it using the PTH cache.
   void EnterSourceFileWithPTH(PTHLexer *PL, const DirectoryLookup *Dir);
 
+  /// \brief Set the file ID for the preprocessor predefines.
+  void setPredefinesFileID(FileID FID) {
+    assert(PredefinesFileID.isInvalid() && "PredefinesFileID already set!");
+    PredefinesFileID = FID;
+  }
+
   /// IsFileLexer - Returns true if we are lexing from a file and not a
   ///  pragma or a macro.
   static bool IsFileLexer(const Lexer* L, const PreprocessorLexer* P) {
@@ -1367,8 +1427,6 @@ private:
   // Macro handling.
   void HandleDefineDirective(Token &Tok);
   void HandleUndefDirective(Token &Tok);
-  void UndefineMacro(IdentifierInfo *II, MacroInfo *MI,
-                     SourceLocation UndefLoc);
 
   // Conditional Inclusion.
   void HandleIfdefDirective(Token &Tok, bool isIfndef,
diff --git a/include/clang/Lex/PreprocessorOptions.h b/include/clang/Lex/PreprocessorOptions.h
index e5fe373..eba2a13 100644
--- a/include/clang/Lex/PreprocessorOptions.h
+++ b/include/clang/Lex/PreprocessorOptions.h
@@ -10,14 +10,16 @@
 #ifndef LLVM_CLANG_LEX_PREPROCESSOROPTIONS_H_
 #define LLVM_CLANG_LEX_PREPROCESSOROPTIONS_H_
 
+#include "clang/Basic/SourceLocation.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSet.h"
 #include <cassert>
+#include <set>
 #include <string>
 #include <utility>
 #include <vector>
-#include <set>
 
 namespace llvm {
   class MemoryBuffer;
@@ -39,23 +41,20 @@ enum ObjCXXARCStandardLibraryKind {
   
 /// PreprocessorOptions - This class is used for passing the various options
 /// used in preprocessor initialization to InitializePreprocessor().
-class PreprocessorOptions : public llvm::RefCountedBase<PreprocessorOptions> {
+class PreprocessorOptions : public RefCountedBase<PreprocessorOptions> {
 public:
   std::vector<std::pair<std::string, bool/*isUndef*/> > Macros;
   std::vector<std::string> Includes;
   std::vector<std::string> MacroIncludes;
 
-  unsigned UsePredefines : 1; /// Initialize the preprocessor with the compiler
-                              /// and target specific predefines.
+  /// \brief Initialize the preprocessor with the compiler and target specific
+  /// predefines.
+  unsigned UsePredefines : 1;
+
+  /// \brief Whether we should maintain a detailed record of all macro
+  /// definitions and expansions.
+  unsigned DetailedRecord : 1;
 
-  unsigned DetailedRecord : 1; /// Whether we should maintain a detailed
-                               /// record of all macro definitions and
-                               /// expansions.
-  unsigned DetailedRecordConditionalDirectives : 1; /// Whether in the
-                               /// preprocessing record we should also keep
-                               /// track of locations of conditional directives
-                               /// in non-system files.
-  
   /// The implicit PCH included at the start of the translation unit, or empty.
   std::string ImplicitPCHInclude;
 
@@ -119,14 +118,28 @@ public:
   /// with support for lifetime-qualified pointers.
   ObjCXXARCStandardLibraryKind ObjCXXARCStandardLibrary;
     
-  /// \brief The path of modules being build, which is used to detect
-  /// cycles in the module dependency graph as modules are being built.
-  ///
-  /// There is no way to set this value from the command line. If we ever need
-  /// to do so (e.g., if on-demand module construction moves out-of-process),
-  /// we can add a cc1-level option to do so.
-  SmallVector<std::string, 2> ModuleBuildPath;
+  /// \brief Records the set of modules
+  class FailedModulesSet : public RefCountedBase<FailedModulesSet> {
+    llvm::StringSet<> Failed;
+
+  public:
+    bool hasAlreadyFailed(StringRef module) {
+      return Failed.count(module) > 0;
+    }
+
+    void addFailed(StringRef module) {
+      Failed.insert(module);
+    }
+  };
   
+  /// \brief The set of modules that failed to build.
+  ///
+  /// This pointer will be shared among all of the compiler instances created
+  /// to (re)build modules, so that once a module fails to build anywhere,
+  /// other instances will see that the module has failed and won't try to
+  /// build it again.
+  IntrusiveRefCntPtr<FailedModulesSet> FailedModules;
+
   typedef std::vector<std::pair<std::string, std::string> >::iterator
     remapped_file_iterator;
   typedef std::vector<std::pair<std::string, std::string> >::const_iterator
@@ -163,7 +176,6 @@ public:
   
 public:
   PreprocessorOptions() : UsePredefines(true), DetailedRecord(false),
-                          DetailedRecordConditionalDirectives(false),
                           DisablePCHValidation(false),
                           AllowPCHWithCompilerErrors(false),
                           DumpDeserializedPCHDecls(false),
diff --git a/include/clang/Lex/Token.h b/include/clang/Lex/Token.h
index 50b86c8..bcbe9c9 100644
--- a/include/clang/Lex/Token.h
+++ b/include/clang/Lex/Token.h
@@ -14,10 +14,10 @@
 #ifndef LLVM_CLANG_TOKEN_H
 #define LLVM_CLANG_TOKEN_H
 
+#include "clang/Basic/OperatorKinds.h"
+#include "clang/Basic/SourceLocation.h"
 #include "clang/Basic/TemplateKinds.h"
 #include "clang/Basic/TokenKinds.h"
-#include "clang/Basic/SourceLocation.h"
-#include "clang/Basic/OperatorKinds.h"
 #include <cstdlib>
 
 namespace clang {
@@ -74,9 +74,10 @@ public:
     StartOfLine   = 0x01,  // At start of line or only after whitespace.
     LeadingSpace  = 0x02,  // Whitespace exists before this token.
     DisableExpand = 0x04,  // This identifier may never be macro expanded.
-    NeedsCleaning = 0x08,   // Contained an escaped newline or trigraph.
+    NeedsCleaning = 0x08,  // Contained an escaped newline or trigraph.
     LeadingEmptyMacro = 0x10, // Empty macro exists before this token.
-    HasUDSuffix = 0x20     // This string or character literal has a ud-suffix.
+    HasUDSuffix = 0x20,    // This string or character literal has a ud-suffix.
+    HasUCN = 0x40          // This identifier contains a UCN.
   };
 
   tok::TokenKind getKind() const { return (tok::TokenKind)Kind; }
@@ -257,6 +258,9 @@ public:
   /// \brief Return true if this token is a string or character literal which
   /// has a ud-suffix.
   bool hasUDSuffix() const { return (Flags & HasUDSuffix) ? true : false; }
+
+  /// Returns true if this token contains a universal character name.
+  bool hasUCN() const { return (Flags & HasUCN) ? true : false; }
 };
 
 /// \brief Information about the conditional stack (\#if directives)
diff --git a/include/clang/Parse/Parser.h b/include/clang/Parse/Parser.h
index c433344..8cc60a2 100644
--- a/include/clang/Parse/Parser.h
+++ b/include/clang/Parse/Parser.h
@@ -14,11 +14,13 @@
 #ifndef LLVM_CLANG_PARSE_PARSER_H
 #define LLVM_CLANG_PARSE_PARSER_H
 
+#include "clang/Basic/OpenMPKinds.h"
+#include "clang/Basic/OperatorPrecedence.h"
 #include "clang/Basic/Specifiers.h"
-#include "clang/Lex/Preprocessor.h"
 #include "clang/Lex/CodeCompletionHandler.h"
-#include "clang/Sema/Sema.h"
+#include "clang/Lex/Preprocessor.h"
 #include "clang/Sema/DeclSpec.h"
+#include "clang/Sema/Sema.h"
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/Support/Compiler.h"
@@ -44,39 +46,6 @@ namespace clang {
   class PoisonSEHIdentifiersRAIIObject;
   class VersionTuple;
 
-/// PrettyStackTraceParserEntry - If a crash happens while the parser is active,
-/// an entry is printed for it.
-class PrettyStackTraceParserEntry : public llvm::PrettyStackTraceEntry {
-  const Parser &P;
-public:
-  PrettyStackTraceParserEntry(const Parser &p) : P(p) {}
-  virtual void print(raw_ostream &OS) const;
-};
-
-/// PrecedenceLevels - These are precedences for the binary/ternary
-/// operators in the C99 grammar.  These have been named to relate
-/// with the C99 grammar productions.  Low precedences numbers bind
-/// more weakly than high numbers.
-namespace prec {
-  enum Level {
-    Unknown         = 0,    // Not binary operator.
-    Comma           = 1,    // ,
-    Assignment      = 2,    // =, *=, /=, %=, +=, -=, <<=, >>=, &=, ^=, |=
-    Conditional     = 3,    // ?
-    LogicalOr       = 4,    // ||
-    LogicalAnd      = 5,    // &&
-    InclusiveOr     = 6,    // |
-    ExclusiveOr     = 7,    // ^
-    And             = 8,    // &
-    Equality        = 9,    // ==, !=
-    Relational      = 10,   //  >=, <=, >, <
-    Shift           = 11,   // <<, >>
-    Additive        = 12,   // -, +
-    Multiplicative  = 13,   // *, /, %
-    PointerToMember = 14    // .*, ->*
-  };
-}
-
 /// Parser - This implements a parser for the C family of languages.  After
 /// parsing units of the grammar, productions are invoked to handle whatever has
 /// been read.
@@ -179,6 +148,7 @@ class Parser : public CodeCompletionHandler {
   OwningPtr<PragmaHandler> FPContractHandler;
   OwningPtr<PragmaHandler> OpenCLExtensionHandler;
   OwningPtr<CommentHandler> CommentSemaHandler;
+  OwningPtr<PragmaHandler> OpenMPHandler;
 
   /// Whether the '>' token acts as an operator or not. This will be
   /// true except when we are parsing an expression within a C++
@@ -255,15 +225,6 @@ public:
   typedef llvm::MutableArrayRef<Stmt*> MultiStmtArg;
   typedef Sema::FullExprArg FullExprArg;
 
-  /// Adorns a ExprResult with Actions to make it an ExprResult
-  ExprResult Owned(ExprResult res) {
-    return ExprResult(res);
-  }
-  /// Adorns a StmtResult with Actions to make it an StmtResult
-  StmtResult Owned(StmtResult res) {
-    return StmtResult(res);
-  }
-
   ExprResult ExprError() { return ExprResult(true); }
   StmtResult StmtError() { return StmtResult(true); }
 
@@ -274,10 +235,6 @@ public:
 
   // Parsing methods.
 
-  /// ParseTranslationUnit - All in one method that initializes parses, and
-  /// shuts down the parser.
-  void ParseTranslationUnit();
-
   /// Initialize - Warm up the parser.
   ///
   void Initialize();
@@ -290,12 +247,12 @@ public:
   /// This does not work with all kinds of tokens: strings and specific other
   /// tokens must be consumed with custom methods below.  This returns the
   /// location of the consumed token.
-  SourceLocation ConsumeToken() {
+  SourceLocation ConsumeToken(bool ConsumeCodeCompletionTok = false) {
     assert(!isTokenStringLiteral() && !isTokenParen() && !isTokenBracket() &&
            !isTokenBrace() &&
            "Should consume special tokens with Consume*Token");
 
-    if (Tok.is(tok::code_completion))
+    if (!ConsumeCodeCompletionTok && Tok.is(tok::code_completion))
       return handleUnexpectedCodeCompletionToken();
 
     PrevTokLocation = Tok.getLocation();
@@ -324,11 +281,7 @@ private:
   /// isTokenStringLiteral - True if this token is a string-literal.
   ///
   bool isTokenStringLiteral() const {
-    return Tok.getKind() == tok::string_literal ||
-           Tok.getKind() == tok::wide_string_literal ||
-           Tok.getKind() == tok::utf8_string_literal ||
-           Tok.getKind() == tok::utf16_string_literal ||
-           Tok.getKind() == tok::utf32_string_literal;
+    return tok::isStringLiteral(Tok.getKind());
   }
 
   /// \brief Returns true if the current token is '=' or is a type of '='.
@@ -338,7 +291,7 @@ private:
   /// ConsumeAnyToken - Dispatch to the right Consume* method based on the
   /// current token type.  This should only be used in cases where the type of
   /// the token really isn't known, e.g. in error recovery.
-  SourceLocation ConsumeAnyToken() {
+  SourceLocation ConsumeAnyToken(bool ConsumeCodeCompletionTok = false) {
     if (isTokenParen())
       return ConsumeParen();
     else if (isTokenBracket())
@@ -348,7 +301,7 @@ private:
     else if (isTokenStringLiteral())
       return ConsumeStringToken();
     else
-      return ConsumeToken();
+      return ConsumeToken(ConsumeCodeCompletionTok);
   }
 
   /// ConsumeParen - This consume method keeps the paren count up-to-date.
@@ -849,7 +802,7 @@ private:
   };
 
   // A list of late-parsed attributes.  Used by ParseGNUAttributes.
-  class LateParsedAttrList: public llvm::SmallVector<LateParsedAttribute*, 2> {
+  class LateParsedAttrList: public SmallVector<LateParsedAttribute *, 2> {
   public:
     LateParsedAttrList(bool PSoon = false) : ParseSoon(PSoon) { }
 
@@ -869,7 +822,7 @@ private:
 
     /// \brief Whether this member function had an associated template
     /// scope. When true, D is a template declaration.
-    /// othewise, it is a member function declaration.
+    /// otherwise, it is a member function declaration.
     bool TemplateScope;
 
     explicit LexedMethod(Parser* P, Decl *MD)
@@ -1097,7 +1050,8 @@ private:
   void DeallocateParsedClasses(ParsingClass *Class);
   void PopParsingClass(Sema::ParsingClassState);
 
-  Decl *ParseCXXInlineMethodDef(AccessSpecifier AS, AttributeList *AccessAttrs,
+  NamedDecl *ParseCXXInlineMethodDef(AccessSpecifier AS,
+                                AttributeList *AccessAttrs,
                                 ParsingDeclarator &D,
                                 const ParsedTemplateInfo &TemplateInfo,
                                 const VirtSpecifiers& VS,
@@ -1159,10 +1113,15 @@ private:
   ExprResult ParseAsmStringLiteral();
 
   // Objective-C External Declarations
+  void MaybeSkipAttributes(tok::ObjCKeywordKind Kind);
   DeclGroupPtrTy ParseObjCAtDirectives();
   DeclGroupPtrTy ParseObjCAtClassDeclaration(SourceLocation atLoc);
   Decl *ParseObjCAtInterfaceDeclaration(SourceLocation AtLoc,
                                         ParsedAttributes &prefixAttrs);
+  void HelperActionsForIvarDeclarations(Decl *interfaceDecl, SourceLocation atLoc,
+                                        BalancedDelimiterTracker &T,
+                                        SmallVectorImpl<Decl *> &AllIvarDecls,
+                                        bool RBraceMissing);
   void ParseObjCClassInstanceVariables(Decl *interfaceDecl,
                                        tok::ObjCKeywordKind visibility,
                                        SourceLocation atLoc);
@@ -1289,7 +1248,7 @@ private:
                            SmallVectorImpl<SourceLocation> &CommaLocs,
                            void (Sema::*Completer)(Scope *S,
                                                    Expr *Data,
-                                             llvm::ArrayRef<Expr *> Args) = 0,
+                                                   ArrayRef<Expr *> Args) = 0,
                            Expr *Data = 0);
 
   /// ParenParseOption - Control what ParseParenExpression will parse.
@@ -1332,7 +1291,8 @@ private:
                                       ParsedType ObjectType,
                                       bool EnteringContext,
                                       bool *MayBePseudoDestructor = 0,
-                                      bool IsTypename = false);
+                                      bool IsTypename = false,
+                                      IdentifierInfo **LastII = 0);
 
   void CheckForLParenAfterColonColon();
 
@@ -1342,7 +1302,7 @@ private:
   // [...] () -> type {...}
   ExprResult ParseLambdaExpression();
   ExprResult TryParseLambdaExpression();
-  llvm::Optional<unsigned> ParseLambdaIntroducer(LambdaIntroducer &Intro);
+  Optional<unsigned> ParseLambdaIntroducer(LambdaIntroducer &Intro);
   bool TryParseLambdaIntroducer(LambdaIntroducer &Intro);
   ExprResult ParseLambdaExpressionAfterIntroducer(
                LambdaIntroducer &Intro);
@@ -1637,7 +1597,8 @@ private:
 
   bool ParseImplicitInt(DeclSpec &DS, CXXScopeSpec *SS,
                         const ParsedTemplateInfo &TemplateInfo,
-                        AccessSpecifier AS, DeclSpecContext DSC);
+                        AccessSpecifier AS, DeclSpecContext DSC, 
+                        ParsedAttributesWithRange &Attrs);
   DeclSpecContext getDeclSpecContextFromDeclaratorContext(unsigned Context);
   void ParseDeclarationSpecifiers(DeclSpec &DS,
                 const ParsedTemplateInfo &TemplateInfo = ParsedTemplateInfo(),
@@ -1843,7 +1804,8 @@ public:
                            Declarator::TheContext Context
                              = Declarator::TypeNameContext,
                            AccessSpecifier AS = AS_none,
-                           Decl **OwnedType = 0);
+                           Decl **OwnedType = 0,
+                           ParsedAttributes *Attrs = 0);
 
 private:
   void ParseBlockId(SourceLocation CaretLoc);
@@ -1852,11 +1814,22 @@ private:
   // an attribute is not allowed.
   bool CheckProhibitedCXX11Attribute() {
     assert(Tok.is(tok::l_square));
-    if (!getLangOpts().CPlusPlus0x || NextToken().isNot(tok::l_square))
+    if (!getLangOpts().CPlusPlus11 || NextToken().isNot(tok::l_square))
       return false;
     return DiagnoseProhibitedCXX11Attribute();
   }
   bool DiagnoseProhibitedCXX11Attribute();
+  void CheckMisplacedCXX11Attribute(ParsedAttributesWithRange &Attrs,
+                                    SourceLocation CorrectLocation) {
+    if (!getLangOpts().CPlusPlus11)
+      return;
+    if ((Tok.isNot(tok::l_square) || NextToken().isNot(tok::l_square)) &&
+        Tok.isNot(tok::kw_alignas))
+      return;
+    DiagnoseMisplacedCXX11Attribute(Attrs, CorrectLocation);
+  }
+  void DiagnoseMisplacedCXX11Attribute(ParsedAttributesWithRange &Attrs,
+                                       SourceLocation CorrectLocation);
 
   void ProhibitAttributes(ParsedAttributesWithRange &attrs) {
     if (!attrs.Range.isValid()) return;
@@ -1896,26 +1869,26 @@ private:
                              SourceLocation ScopeLoc,
                              AttributeList::Syntax Syntax);
 
-  void MaybeParseCXX0XAttributes(Declarator &D) {
-    if (getLangOpts().CPlusPlus0x && isCXX11AttributeSpecifier()) {
+  void MaybeParseCXX11Attributes(Declarator &D) {
+    if (getLangOpts().CPlusPlus11 && isCXX11AttributeSpecifier()) {
       ParsedAttributesWithRange attrs(AttrFactory);
       SourceLocation endLoc;
       ParseCXX11Attributes(attrs, &endLoc);
       D.takeAttributes(attrs, endLoc);
     }
   }
-  void MaybeParseCXX0XAttributes(ParsedAttributes &attrs,
+  void MaybeParseCXX11Attributes(ParsedAttributes &attrs,
                                  SourceLocation *endLoc = 0) {
-    if (getLangOpts().CPlusPlus0x && isCXX11AttributeSpecifier()) {
+    if (getLangOpts().CPlusPlus11 && isCXX11AttributeSpecifier()) {
       ParsedAttributesWithRange attrsWithRange(AttrFactory);
       ParseCXX11Attributes(attrsWithRange, endLoc);
       attrs.takeAllFrom(attrsWithRange);
     }
   }
-  void MaybeParseCXX0XAttributes(ParsedAttributesWithRange &attrs,
+  void MaybeParseCXX11Attributes(ParsedAttributesWithRange &attrs,
                                  SourceLocation *endLoc = 0,
                                  bool OuterMightBeMessageSend = false) {
-    if (getLangOpts().CPlusPlus0x &&
+    if (getLangOpts().CPlusPlus11 &&
         isCXX11AttributeSpecifier(false, OuterMightBeMessageSend))
       ParseCXX11Attributes(attrs, endLoc);
   }
@@ -1954,7 +1927,7 @@ private:
                                   ParsedAttributes &attrs,
                                   SourceLocation *endLoc);
 
-  bool IsThreadSafetyAttribute(llvm::StringRef AttrName);
+  bool IsThreadSafetyAttribute(StringRef AttrName);
   void ParseThreadSafetyAttribute(IdentifierInfo &AttrName,
                                   SourceLocation AttrNameLoc,
                                   ParsedAttributes &Attrs,
@@ -1978,13 +1951,13 @@ private:
   void ParseAlignmentSpecifier(ParsedAttributes &Attrs,
                                SourceLocation *endLoc = 0);
 
-  VirtSpecifiers::Specifier isCXX0XVirtSpecifier(const Token &Tok) const;
-  VirtSpecifiers::Specifier isCXX0XVirtSpecifier() const {
-    return isCXX0XVirtSpecifier(Tok);
+  VirtSpecifiers::Specifier isCXX11VirtSpecifier(const Token &Tok) const;
+  VirtSpecifiers::Specifier isCXX11VirtSpecifier() const {
+    return isCXX11VirtSpecifier(Tok);
   }
-  void ParseOptionalCXX0XVirtSpecifierSeq(VirtSpecifiers &VS, bool IsInterface);
+  void ParseOptionalCXX11VirtSpecifierSeq(VirtSpecifiers &VS, bool IsInterface);
 
-  bool isCXX0XFinalKeyword() const;
+  bool isCXX11FinalKeyword() const;
 
   /// DeclaratorScopeObj - RAII object used in Parser::ParseDirectDeclarator to
   /// enter a new C++ declarator scope and exit it when the function is
@@ -2027,7 +2000,8 @@ private:
                                DirectDeclParseFunction DirectDeclParser);
 
   void ParseTypeQualifierListOpt(DeclSpec &DS, bool GNUAttributesAllowed = true,
-                                 bool CXX0XAttributesAllowed = true);
+                                 bool CXX11AttributesAllowed = true,
+                                 bool AtomicAllowed = true);
   void ParseDirectDeclarator(Declarator &D);
   void ParseParenDeclarator(Declarator &D);
   void ParseFunctionDeclarator(Declarator &D,
@@ -2098,8 +2072,12 @@ private:
   void ParseClassSpecifier(tok::TokenKind TagTokKind, SourceLocation TagLoc,
                            DeclSpec &DS, const ParsedTemplateInfo &TemplateInfo,
                            AccessSpecifier AS, bool EnteringContext,
-                           DeclSpecContext DSC);
-  void ParseCXXMemberSpecification(SourceLocation StartLoc, unsigned TagType,
+                           DeclSpecContext DSC, 
+                           ParsedAttributesWithRange &Attributes);
+  void ParseCXXMemberSpecification(SourceLocation StartLoc,
+                                   SourceLocation AttrFixitLoc,
+                                   ParsedAttributesWithRange &Attrs,
+                                   unsigned TagType,
                                    Decl *TagDecl);
   ExprResult ParseCXXMemberInitializer(Decl *D, bool IsFunction,
                                        SourceLocation &EqualLoc);
@@ -2131,6 +2109,11 @@ private:
                                   ParsedType ObjectType,
                                   UnqualifiedId &Result);
 
+  //===--------------------------------------------------------------------===//
+  // OpenMP: Directives and clauses.
+  DeclGroupPtrTy ParseOpenMPDeclarativeDirective();
+  bool ParseOpenMPSimpleVarList(OpenMPDirectiveKind Kind,
+                                SmallVectorImpl<DeclarationNameInfo> &IdList);
 public:
   bool ParseUnqualifiedId(CXXScopeSpec &SS, bool EnteringContext,
                           bool AllowDestructorName,
@@ -2173,6 +2156,8 @@ private:
   // C++ 14.3: Template arguments [temp.arg]
   typedef SmallVector<ParsedTemplateArgument, 16> TemplateArgList;
 
+  bool ParseGreaterThanInTemplateList(SourceLocation &RAngleLoc,
+                                      bool ConsumeLastToken);
   bool ParseTemplateIdAfterTemplateName(TemplateTy Template,
                                         SourceLocation TemplateNameLoc,
                                         const CXXScopeSpec &SS,
diff --git a/include/clang/Rewrite/Core/RewriteRope.h b/include/clang/Rewrite/Core/RewriteRope.h
index 9f1bbe5..a5192ef 100644
--- a/include/clang/Rewrite/Core/RewriteRope.h
+++ b/include/clang/Rewrite/Core/RewriteRope.h
@@ -15,10 +15,9 @@
 #define LLVM_CLANG_REWRITEROPE_H
 
 #include "llvm/Support/Compiler.h"
-
-#include <cstring>
 #include <cassert>
 #include <cstddef>
+#include <cstring>
 #include <iterator>
 
 namespace clang {
diff --git a/include/clang/Rewrite/Core/Rewriter.h b/include/clang/Rewrite/Core/Rewriter.h
index a33ea13..cb044ae 100644
--- a/include/clang/Rewrite/Core/Rewriter.h
+++ b/include/clang/Rewrite/Core/Rewriter.h
@@ -52,7 +52,11 @@ public:
   iterator end() const { return Buffer.end(); }
   unsigned size() const { return Buffer.size(); }
 
-  raw_ostream &write(raw_ostream &) const;
+  /// \brief Write to \p Stream the result of applying all changes to the
+  /// original buffer.
+  ///
+  /// The original buffer is not actually changed.
+  raw_ostream &write(raw_ostream &Stream) const;
 
   /// RemoveText - Remove the specified text.
   void RemoveText(unsigned OrigOffset, unsigned Size,
@@ -279,7 +283,7 @@ public:
   buffer_iterator buffer_begin() { return RewriteBuffers.begin(); }
   buffer_iterator buffer_end() { return RewriteBuffers.end(); }
 
-  /// SaveFiles - Save all changed files to disk.
+  /// overwriteChangedFiles - Save all changed files to disk.
   ///
   /// Returns whether not all changes were saved successfully.
   /// Outputs diagnostics via the source manager's diagnostic engine
diff --git a/include/clang/Rewrite/Frontend/ASTConsumers.h b/include/clang/Rewrite/Frontend/ASTConsumers.h
index c9c92e3..584af3f 100644
--- a/include/clang/Rewrite/Frontend/ASTConsumers.h
+++ b/include/clang/Rewrite/Frontend/ASTConsumers.h
@@ -35,7 +35,8 @@ ASTConsumer *CreateModernObjCRewriter(const std::string &InFile,
                                 raw_ostream *OS,
                                 DiagnosticsEngine &Diags,
                                 const LangOptions &LOpts,
-                                bool SilenceRewriteMacroWarning);
+                                bool SilenceRewriteMacroWarning,
+                                bool LineInfo);
 
 /// CreateHTMLPrinter - Create an AST consumer which rewrites source code to
 /// HTML with syntax highlighting suitable for viewing in a web-browser.
diff --git a/include/clang/Rewrite/Frontend/FixItRewriter.h b/include/clang/Rewrite/Frontend/FixItRewriter.h
index f12a034..04c04a2 100644
--- a/include/clang/Rewrite/Frontend/FixItRewriter.h
+++ b/include/clang/Rewrite/Frontend/FixItRewriter.h
@@ -17,8 +17,8 @@
 
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/SourceLocation.h"
-#include "clang/Rewrite/Core/Rewriter.h"
 #include "clang/Edit/EditedSource.h"
+#include "clang/Rewrite/Core/Rewriter.h"
 
 namespace clang {
 
diff --git a/include/clang/Sema/AttributeList.h b/include/clang/Sema/AttributeList.h
index 2e8b0c0..0f0d218 100644
--- a/include/clang/Sema/AttributeList.h
+++ b/include/clang/Sema/AttributeList.h
@@ -15,11 +15,11 @@
 #ifndef LLVM_CLANG_SEMA_ATTRLIST_H
 #define LLVM_CLANG_SEMA_ATTRLIST_H
 
-#include "llvm/Support/Allocator.h"
-#include "llvm/ADT/SmallVector.h"
 #include "clang/Basic/SourceLocation.h"
 #include "clang/Basic/VersionTuple.h"
 #include "clang/Sema/Ownership.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/Support/Allocator.h"
 #include <cassert>
 
 namespace clang {
@@ -44,8 +44,9 @@ struct AvailabilityChange {
   bool isValid() const { return !Version.empty(); }
 };
 
-/// AttributeList - Represents GCC's __attribute__ declaration. There are
-/// 4 forms of this construct...they are:
+/// AttributeList - Represents a syntactic attribute.
+///
+/// For a GNU attribute, there are four forms of this construct:
 ///
 /// 1: __attribute__(( const )). ParmName/Args/NumArgs will all be unused.
 /// 2: __attribute__(( mode(byte) )). ParmName used, Args/NumArgs unused.
@@ -56,12 +57,14 @@ class AttributeList { // TODO: This should really be called ParsedAttribute
 public:
   /// The style used to specify an attribute.
   enum Syntax {
+    /// __attribute__((...))
     AS_GNU,
+    /// [[...]]
     AS_CXX11,
+    /// __declspec(...)
     AS_Declspec,
-    // eg) __w64, __ptr32, etc.  It is implied that an MSTypespec is also
-    // a declspec.
-    AS_MSTypespec   
+    /// __ptr16, alignas(...), etc.
+    AS_Keyword
   };
 private:
   IdentifierInfo *AttrName;
@@ -70,6 +73,7 @@ private:
   SourceRange AttrRange;
   SourceLocation ScopeLoc;
   SourceLocation ParmLoc;
+  SourceLocation EllipsisLoc;
 
   /// The number of expression arguments this attribute has.
   /// The expressions themselves are stored after the object.
@@ -140,6 +144,14 @@ private:
     return *reinterpret_cast<const TypeTagForDatatypeData *>(this + 1);
   }
 
+  ParsedType &getTypeBuffer() {
+    return *reinterpret_cast<ParsedType *>(this + 1);
+  }
+
+  const ParsedType &getTypeBuffer() const {
+    return *reinterpret_cast<const ParsedType *>(this + 1);
+  }
+
   AttributeList(const AttributeList &) LLVM_DELETED_FUNCTION;
   void operator=(const AttributeList &) LLVM_DELETED_FUNCTION;
   void operator delete(void *) LLVM_DELETED_FUNCTION;
@@ -152,11 +164,11 @@ private:
                 IdentifierInfo *scopeName, SourceLocation scopeLoc,
                 IdentifierInfo *parmName, SourceLocation parmLoc,
                 Expr **args, unsigned numArgs,
-                Syntax syntaxUsed)
+                Syntax syntaxUsed, SourceLocation ellipsisLoc)
     : AttrName(attrName), ScopeName(scopeName), ParmName(parmName),
       AttrRange(attrRange), ScopeLoc(scopeLoc), ParmLoc(parmLoc),
-      NumArgs(numArgs), SyntaxUsed(syntaxUsed), Invalid(false),
-      UsedAsTypeAttr(false), IsAvailability(false),
+      EllipsisLoc(ellipsisLoc), NumArgs(numArgs), SyntaxUsed(syntaxUsed),
+      Invalid(false), UsedAsTypeAttr(false), IsAvailability(false),
       IsTypeTagForDatatype(false), NextInPosition(0), NextInPool(0) {
     if (numArgs) memcpy(getArgsBuffer(), args, numArgs * sizeof(Expr*));
     AttrKind = getKind(getName(), getScopeName(), syntaxUsed);
@@ -173,7 +185,7 @@ private:
                 const Expr *messageExpr,
                 Syntax syntaxUsed)
     : AttrName(attrName), ScopeName(scopeName), ParmName(parmName),
-      AttrRange(attrRange), ScopeLoc(scopeLoc), ParmLoc(parmLoc),
+      AttrRange(attrRange), ScopeLoc(scopeLoc), ParmLoc(parmLoc), EllipsisLoc(),
       NumArgs(0), SyntaxUsed(syntaxUsed),
       Invalid(false), UsedAsTypeAttr(false), IsAvailability(true),
       IsTypeTagForDatatype(false),
@@ -194,7 +206,7 @@ private:
                 bool mustBeNull, Syntax syntaxUsed)
     : AttrName(attrName), ScopeName(scopeName), ParmName(argumentKindName),
       AttrRange(attrRange), ScopeLoc(scopeLoc), ParmLoc(argumentKindLoc),
-      NumArgs(0), SyntaxUsed(syntaxUsed),
+      EllipsisLoc(), NumArgs(0), SyntaxUsed(syntaxUsed),
       Invalid(false), UsedAsTypeAttr(false), IsAvailability(false),
       IsTypeTagForDatatype(true), NextInPosition(NULL), NextInPool(NULL) {
     TypeTagForDatatypeData &ExtraData = getTypeTagForDatatypeDataSlot();
@@ -204,6 +216,20 @@ private:
     AttrKind = getKind(getName(), getScopeName(), syntaxUsed);
   }
 
+  /// Constructor for attributes with a single type argument.
+  AttributeList(IdentifierInfo *attrName, SourceRange attrRange,
+                IdentifierInfo *scopeName, SourceLocation scopeLoc,
+                IdentifierInfo *parmName, SourceLocation parmLoc,
+                ParsedType typeArg, Syntax syntaxUsed)
+      : AttrName(attrName), ScopeName(scopeName), ParmName(parmName),
+        AttrRange(attrRange), ScopeLoc(scopeLoc), ParmLoc(parmLoc),
+        EllipsisLoc(), NumArgs(1), SyntaxUsed(syntaxUsed), Invalid(false),
+        UsedAsTypeAttr(false), IsAvailability(false),
+        IsTypeTagForDatatype(false), NextInPosition(0), NextInPool(0) {
+    new (&getTypeBuffer()) ParsedType(typeArg);
+    AttrKind = getKind(getName(), getScopeName(), syntaxUsed);
+  }
+
   friend class AttributePool;
   friend class AttributeFactory;
 
@@ -227,12 +253,16 @@ public:
   IdentifierInfo *getParameterName() const { return ParmName; }
   SourceLocation getParameterLoc() const { return ParmLoc; }
 
-  /// Returns true if the attribute is a pure __declspec or a synthesized
-  /// declspec representing a type specification (like __w64 or __ptr32).
-  bool isDeclspecAttribute() const { return SyntaxUsed == AS_Declspec ||
-                                            SyntaxUsed == AS_MSTypespec; }
-  bool isCXX0XAttribute() const { return SyntaxUsed == AS_CXX11; }
-  bool isMSTypespecAttribute() const { return SyntaxUsed == AS_MSTypespec; }
+  bool isAlignasAttribute() const {
+    // FIXME: Use a better mechanism to determine this.
+    return getKind() == AT_Aligned && SyntaxUsed == AS_Keyword;
+  }
+
+  bool isDeclspecAttribute() const { return SyntaxUsed == AS_Declspec; }
+  bool isCXX11Attribute() const {
+    return SyntaxUsed == AS_CXX11 || isAlignasAttribute();
+  }
+  bool isKeywordAttribute() const { return SyntaxUsed == AS_Keyword; }
 
   bool isInvalid() const { return Invalid; }
   void setInvalid(bool b = true) const { Invalid = b; }
@@ -240,6 +270,9 @@ public:
   bool isUsedAsTypeAttr() const { return UsedAsTypeAttr; }
   void setUsedAsTypeAttr() { UsedAsTypeAttr = true; }
 
+  bool isPackExpansion() const { return EllipsisLoc.isValid(); }
+  SourceLocation getEllipsisLoc() const { return EllipsisLoc; }
+
   Kind getKind() const { return Kind(AttrKind); }
   static Kind getKind(const IdentifierInfo *Name, const IdentifierInfo *Scope,
                       Syntax SyntaxUsed);
@@ -340,6 +373,16 @@ public:
            "Not a type_tag_for_datatype attribute");
     return getTypeTagForDatatypeDataSlot().MustBeNull;
   }
+
+  const ParsedType &getTypeArg() const {
+    assert(getKind() == AT_VecTypeHint && "Not a type attribute");
+    return getTypeBuffer();
+  }
+
+  /// \brief Get an index into the attribute spelling list
+  /// defined in Attr.td. This index is used by an attribute
+  /// to pretty print itself.
+  unsigned getAttributeSpellingListIndex() const;
 };
 
 /// A factory, from which one makes pools, from which one creates
@@ -448,13 +491,15 @@ public:
                         IdentifierInfo *scopeName, SourceLocation scopeLoc,
                         IdentifierInfo *parmName, SourceLocation parmLoc,
                         Expr **args, unsigned numArgs,
-                        AttributeList::Syntax syntax) {
+                        AttributeList::Syntax syntax,
+                        SourceLocation ellipsisLoc = SourceLocation()) {
     void *memory = allocate(sizeof(AttributeList)
                             + numArgs * sizeof(Expr*));
     return add(new (memory) AttributeList(attrName, attrRange,
                                           scopeName, scopeLoc,
                                           parmName, parmLoc,
-                                          args, numArgs, syntax));
+                                          args, numArgs, syntax,
+                                          ellipsisLoc));
   }
 
   AttributeList *create(IdentifierInfo *attrName, SourceRange attrRange,
@@ -491,6 +536,18 @@ public:
                                           matchingCType, layoutCompatible,
                                           mustBeNull, syntax));
   }
+
+  AttributeList *createTypeAttribute(
+                    IdentifierInfo *attrName, SourceRange attrRange,
+                    IdentifierInfo *scopeName, SourceLocation scopeLoc,
+                    IdentifierInfo *parmName, SourceLocation parmLoc,
+                    ParsedType typeArg, AttributeList::Syntax syntaxUsed) {
+    void *memory = allocate(sizeof(AttributeList) + sizeof(void *));
+    return add(new (memory) AttributeList(attrName, attrRange,
+                                          scopeName, scopeLoc,
+                                          parmName, parmLoc,
+                                          typeArg, syntaxUsed));
+  }
 };
 
 /// addAttributeLists - Add two AttributeLists together
@@ -511,18 +568,18 @@ inline AttributeList *addAttributeLists(AttributeList *Left,
   return Left;
 }
 
-/// CXX0XAttributeList - A wrapper around a C++0x attribute list.
+/// CXX11AttributeList - A wrapper around a C++11 attribute list.
 /// Stores, in addition to the list proper, whether or not an actual list was
 /// (as opposed to an empty list, which may be ill-formed in some places) and
 /// the source range of the list.
-struct CXX0XAttributeList { 
+struct CXX11AttributeList { 
   AttributeList *AttrList;
   SourceRange Range;
   bool HasAttr;
-  CXX0XAttributeList (AttributeList *attrList, SourceRange range, bool hasAttr)
+  CXX11AttributeList (AttributeList *attrList, SourceRange range, bool hasAttr)
     : AttrList(attrList), Range(range), HasAttr (hasAttr) {
   }
-  CXX0XAttributeList ()
+  CXX11AttributeList ()
     : AttrList(0), Range(), HasAttr(false) {
   }
 };
@@ -588,10 +645,11 @@ public:
                         IdentifierInfo *scopeName, SourceLocation scopeLoc,
                         IdentifierInfo *parmName, SourceLocation parmLoc,
                         Expr **args, unsigned numArgs,
-                        AttributeList::Syntax syntax) {
+                        AttributeList::Syntax syntax,
+                        SourceLocation ellipsisLoc = SourceLocation()) {
     AttributeList *attr =
       pool.create(attrName, attrRange, scopeName, scopeLoc, parmName, parmLoc,
-                  args, numArgs, syntax);
+                  args, numArgs, syntax, ellipsisLoc);
     add(attr);
     return attr;
   }
@@ -632,6 +690,19 @@ public:
     return attr;
   }
 
+  /// Add an attribute with a single type argument.
+  AttributeList *
+  addNewTypeAttr(IdentifierInfo *attrName, SourceRange attrRange,
+                 IdentifierInfo *scopeName, SourceLocation scopeLoc,
+                 IdentifierInfo *parmName, SourceLocation parmLoc,
+                 ParsedType typeArg, AttributeList::Syntax syntaxUsed) {
+    AttributeList *attr =
+        pool.createTypeAttribute(attrName, attrRange, scopeName, scopeLoc,
+                                 parmName, parmLoc, typeArg, syntaxUsed);
+    add(attr);
+    return attr;
+  }
+
   AttributeList *addNewInteger(ASTContext &C, IdentifierInfo *name,
                                SourceLocation loc, int arg) {
     AttributeList *attr =
diff --git a/include/clang/Sema/CMakeLists.txt b/include/clang/Sema/CMakeLists.txt
index 03f99a3..6b5d222 100644
--- a/include/clang/Sema/CMakeLists.txt
+++ b/include/clang/Sema/CMakeLists.txt
@@ -11,4 +11,9 @@ clang_tablegen(AttrParsedAttrList.inc -gen-clang-attr-parsed-attr-list
 clang_tablegen(AttrParsedAttrKinds.inc -gen-clang-attr-parsed-attr-kinds
   -I ${CMAKE_CURRENT_SOURCE_DIR}/../../
   SOURCE ../Basic/Attr.td
-  TARGET ClangAttrParsedAttrKinds)
-\ No newline at end of file
+  TARGET ClangAttrParsedAttrKinds)
+
+clang_tablegen(AttrSpellingListIndex.inc -gen-clang-attr-spelling-index
+  -I ${CMAKE_CURRENT_SOURCE_DIR}/../../
+  SOURCE ../Basic/Attr.td
+  TARGET ClangAttrSpellingListIndex)
diff --git a/include/clang/Sema/CXXFieldCollector.h b/include/clang/Sema/CXXFieldCollector.h
index 6f3c0b4..6685751 100644
--- a/include/clang/Sema/CXXFieldCollector.h
+++ b/include/clang/Sema/CXXFieldCollector.h
@@ -15,6 +15,7 @@
 #ifndef LLVM_CLANG_SEMA_CXXFIELDCOLLECTOR_H
 #define LLVM_CLANG_SEMA_CXXFIELDCOLLECTOR_H
 
+#include "clang/Basic/LLVM.h"
 #include "llvm/ADT/SmallVector.h"
 
 namespace clang {
diff --git a/include/clang/Sema/CodeCompleteConsumer.h b/include/clang/Sema/CodeCompleteConsumer.h
index b128bd8..a1ddec7 100644
--- a/include/clang/Sema/CodeCompleteConsumer.h
+++ b/include/clang/Sema/CodeCompleteConsumer.h
@@ -13,13 +13,13 @@
 #ifndef LLVM_CLANG_SEMA_CODECOMPLETECONSUMER_H
 #define LLVM_CLANG_SEMA_CODECOMPLETECONSUMER_H
 
-#include "clang/AST/Type.h"
+#include "clang-c/Index.h"
 #include "clang/AST/CanonicalType.h"
+#include "clang/AST/Type.h"
 #include "clang/Sema/CodeCompleteOptions.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/Support/Allocator.h"
-#include "clang-c/Index.h"
 #include <string>
 
 namespace clang {
@@ -121,7 +121,7 @@ SimplifiedTypeClass getSimplifiedTypeClass(CanQualType T);
 
 /// \brief Determine the type that this declaration will have if it is used
 /// as a type or in an expression.
-QualType getDeclUsageType(ASTContext &C, NamedDecl *ND);
+QualType getDeclUsageType(ASTContext &C, const NamedDecl *ND);
 
 /// \brief Determine the priority to be given to a macro code completion result
 /// with the given name.
@@ -138,7 +138,7 @@ unsigned getMacroUsagePriority(StringRef MacroName,
 
 /// \brief Determine the libclang cursor kind associated with the given
 /// declaration.
-CXCursorKind getCursorKindForDecl(Decl *D);
+CXCursorKind getCursorKindForDecl(const Decl *D);
 
 class FunctionDecl;
 class FunctionType;
@@ -245,7 +245,8 @@ public:
     /// \brief Code completion in a parenthesized expression, which means that
     /// we may also have types here in C and Objective-C (as well as in C++).
     CCC_ParenthesizedExpression,
-    /// \brief Code completion where an Objective-C instance message is expcted.
+    /// \brief Code completion where an Objective-C instance message is
+    /// expected.
     CCC_ObjCInstanceMessage,
     /// \brief Code completion where an Objective-C class message is expected.
     CCC_ObjCClassMessage,
@@ -530,7 +531,7 @@ class GlobalCodeCompletionAllocator
 };
 
 class CodeCompletionTUInfo {
-  llvm::DenseMap<DeclContext *, StringRef> ParentNames;
+  llvm::DenseMap<const DeclContext *, StringRef> ParentNames;
   IntrusiveRefCntPtr<GlobalCodeCompletionAllocator> AllocatorRef;
 
 public:
@@ -546,7 +547,7 @@ public:
     return *AllocatorRef;
   }
 
-  StringRef getParentName(DeclContext *DC);
+  StringRef getParentName(const DeclContext *DC);
 };
 
 } // end namespace clang
@@ -629,8 +630,9 @@ public:
   void AddAnnotation(const char *A) { Annotations.push_back(A); }
 
   /// \brief Add the parent context information to this code completion.
-  void addParentContext(DeclContext *DC);
+  void addParentContext(const DeclContext *DC);
 
+  const char *getBriefComment() const { return BriefComment; }
   void addBriefComment(StringRef Comment);
   
   StringRef getParentName() const { return ParentName; }
@@ -649,7 +651,7 @@ public:
 
   /// \brief When Kind == RK_Declaration or RK_Pattern, the declaration we are
   /// referring to. In the latter case, the declaration might be NULL.
-  NamedDecl *Declaration;
+  const NamedDecl *Declaration;
 
   union {
     /// \brief When Kind == RK_Keyword, the string representing the keyword
@@ -661,7 +663,7 @@ public:
     CodeCompletionString *Pattern;
 
     /// \brief When Kind == RK_Macro, the identifier that refers to a macro.
-    IdentifierInfo *Macro;
+    const IdentifierInfo *Macro;
   };
 
   /// \brief The priority of this particular code-completion result.
@@ -704,11 +706,12 @@ public:
   NestedNameSpecifier *Qualifier;
 
   /// \brief Build a result that refers to a declaration.
-  CodeCompletionResult(NamedDecl *Declaration,
+  CodeCompletionResult(const NamedDecl *Declaration,
+                       unsigned Priority,
                        NestedNameSpecifier *Qualifier = 0,
                        bool QualifierIsInformative = false,
                        bool Accessible = true)
-    : Declaration(Declaration), Priority(getPriorityFromDecl(Declaration)),
+    : Declaration(Declaration), Priority(Priority),
       StartParameter(0), Kind(RK_Declaration),
       Availability(CXAvailability_Available), Hidden(false),
       QualifierIsInformative(QualifierIsInformative),
@@ -728,7 +731,8 @@ public:
   }
 
   /// \brief Build a result that refers to a macro.
-  CodeCompletionResult(IdentifierInfo *Macro, unsigned Priority = CCP_Macro)
+  CodeCompletionResult(const IdentifierInfo *Macro,
+                       unsigned Priority = CCP_Macro)
     : Declaration(0), Macro(Macro), Priority(Priority), StartParameter(0),
       Kind(RK_Macro), CursorKind(CXCursor_MacroDefinition),
       Availability(CXAvailability_Available), Hidden(false),
@@ -742,7 +746,7 @@ public:
                        unsigned Priority = CCP_CodePattern,
                        CXCursorKind CursorKind = CXCursor_NotImplemented,
                    CXAvailabilityKind Availability = CXAvailability_Available,
-                       NamedDecl *D = 0)
+                       const NamedDecl *D = 0)
     : Declaration(D), Pattern(Pattern), Priority(Priority), StartParameter(0),
       Kind(RK_Pattern), CursorKind(CursorKind), Availability(Availability),
       Hidden(false), QualifierIsInformative(0),
@@ -763,7 +767,7 @@ public:
   }  
   
   /// \brief Retrieve the declaration stored in this result.
-  NamedDecl *getDeclaration() const {
+  const NamedDecl *getDeclaration() const {
     assert(Kind == RK_Declaration && "Not a declaration result");
     return Declaration;
   }
@@ -791,9 +795,6 @@ public:
                                            CodeCompletionTUInfo &CCTUInfo,
                                            bool IncludeBriefComments);
 
-  /// \brief Determine a base priority for the given declaration.
-  static unsigned getPriorityFromDecl(NamedDecl *ND);
-
 private:
   void computeCursorKindAndAvailability(bool Accessible = true);
 };
diff --git a/include/clang/Sema/CodeCompleteOptions.h b/include/clang/Sema/CodeCompleteOptions.h
index 30712db..e43496f 100644
--- a/include/clang/Sema/CodeCompleteOptions.h
+++ b/include/clang/Sema/CodeCompleteOptions.h
@@ -13,16 +13,16 @@
 /// Options controlling the behavior of code completion.
 class CodeCompleteOptions {
 public:
-  ///< Show macros in code completion results.
+  /// Show macros in code completion results.
   unsigned IncludeMacros : 1;
 
-  ///< Show code patterns in code completion results.
+  /// Show code patterns in code completion results.
   unsigned IncludeCodePatterns : 1;
 
-  ///< Show top-level decls in code completion results.
+  /// Show top-level decls in code completion results.
   unsigned IncludeGlobals : 1;
 
-  ///< Show brief documentation comments in code completion results.
+  /// Show brief documentation comments in code completion results.
   unsigned IncludeBriefComments : 1;
 
   CodeCompleteOptions() :
diff --git a/include/clang/Sema/DeclSpec.h b/include/clang/Sema/DeclSpec.h
index 0728e87..5b90784 100644
--- a/include/clang/Sema/DeclSpec.h
+++ b/include/clang/Sema/DeclSpec.h
@@ -23,14 +23,14 @@
 #ifndef LLVM_CLANG_SEMA_DECLSPEC_H
 #define LLVM_CLANG_SEMA_DECLSPEC_H
 
-#include "clang/Sema/AttributeList.h"
-#include "clang/Sema/Ownership.h"
 #include "clang/AST/NestedNameSpecifier.h"
-#include "clang/Lex/Token.h"
 #include "clang/Basic/ExceptionSpecificationType.h"
 #include "clang/Basic/Lambda.h"
 #include "clang/Basic/OperatorKinds.h"
 #include "clang/Basic/Specifiers.h"
+#include "clang/Lex/Token.h"
+#include "clang/Sema/AttributeList.h"
+#include "clang/Sema/Ownership.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/Support/Compiler.h"
 #include "llvm/Support/ErrorHandling.h"
@@ -276,6 +276,14 @@ public:
   static const TST TST_auto = clang::TST_auto;
   static const TST TST_unknown_anytype = clang::TST_unknown_anytype;
   static const TST TST_atomic = clang::TST_atomic;
+  static const TST TST_image1d_t = clang::TST_image1d_t;
+  static const TST TST_image1d_array_t = clang::TST_image1d_array_t;
+  static const TST TST_image1d_buffer_t = clang::TST_image1d_buffer_t;
+  static const TST TST_image2d_t = clang::TST_image2d_t;
+  static const TST TST_image2d_array_t = clang::TST_image2d_array_t;
+  static const TST TST_image3d_t = clang::TST_image3d_t;
+  static const TST TST_sampler_t = clang::TST_sampler_t;
+  static const TST TST_event_t = clang::TST_event_t;
   static const TST TST_error = clang::TST_error;
 
   // type-qualifiers
@@ -283,7 +291,10 @@ public:
     TQ_unspecified = 0,
     TQ_const       = 1,
     TQ_restrict    = 2,
-    TQ_volatile    = 4
+    TQ_volatile    = 4,
+    // This has no corresponding Qualifiers::TQ value, because it's not treated
+    // as a qualifier in our type system.
+    TQ_atomic      = 8
   };
 
   /// ParsedSpecifiers - Flags to query which specifiers were applied.  This is
@@ -306,19 +317,20 @@ private:
   /*TSW*/unsigned TypeSpecWidth : 2;
   /*TSC*/unsigned TypeSpecComplex : 2;
   /*TSS*/unsigned TypeSpecSign : 2;
-  /*TST*/unsigned TypeSpecType : 5;
+  /*TST*/unsigned TypeSpecType : 6;
   unsigned TypeAltiVecVector : 1;
   unsigned TypeAltiVecPixel : 1;
   unsigned TypeAltiVecBool : 1;
   unsigned TypeSpecOwned : 1;
 
   // type-qualifiers
-  unsigned TypeQualifiers : 3;  // Bitwise OR of TQ.
+  unsigned TypeQualifiers : 4;  // Bitwise OR of TQ.
 
   // function-specifier
   unsigned FS_inline_specified : 1;
   unsigned FS_virtual_specified : 1;
   unsigned FS_explicit_specified : 1;
+  unsigned FS_noreturn_specified : 1;
 
   // friend-specifier
   unsigned Friend_specified : 1;
@@ -326,8 +338,6 @@ private:
   // constexpr-specifier
   unsigned Constexpr_specified : 1;
 
-  /*SCS*/unsigned StorageClassSpecAsWritten : 3;
-
   union {
     UnionParsedType TypeRep;
     Decl *DeclRep;
@@ -360,13 +370,12 @@ private:
   /// TSTNameLoc provides source range info for tag types.
   SourceLocation TSTNameLoc;
   SourceRange TypeofParensRange;
-  SourceLocation TQ_constLoc, TQ_restrictLoc, TQ_volatileLoc;
-  SourceLocation FS_inlineLoc, FS_virtualLoc, FS_explicitLoc;
+  SourceLocation TQ_constLoc, TQ_restrictLoc, TQ_volatileLoc, TQ_atomicLoc;
+  SourceLocation FS_inlineLoc, FS_virtualLoc, FS_explicitLoc, FS_noreturnLoc;
   SourceLocation FriendLoc, ModulePrivateLoc, ConstexprLoc;
 
   WrittenBuiltinSpecs writtenBS;
   void SaveWrittenBuiltinSpecs();
-  void SaveStorageSpecifierAsWritten();
 
   ObjCDeclSpec *ObjCQualifiers;
 
@@ -377,16 +386,16 @@ private:
   static bool isExprRep(TST T) {
     return (T == TST_typeofExpr || T == TST_decltype);
   }
+
+  DeclSpec(const DeclSpec &) LLVM_DELETED_FUNCTION;
+  void operator=(const DeclSpec &) LLVM_DELETED_FUNCTION;
+public:
   static bool isDeclRep(TST T) {
     return (T == TST_enum || T == TST_struct ||
             T == TST_interface || T == TST_union ||
             T == TST_class);
   }
 
-  DeclSpec(const DeclSpec &) LLVM_DELETED_FUNCTION;
-  void operator=(const DeclSpec &) LLVM_DELETED_FUNCTION;
-public:
-
   DeclSpec(AttributeFactory &attrFactory)
     : StorageClassSpec(SCS_unspecified),
       SCS_thread_specified(false),
@@ -403,9 +412,9 @@ public:
       FS_inline_specified(false),
       FS_virtual_specified(false),
       FS_explicit_specified(false),
+      FS_noreturn_specified(false),
       Friend_specified(false),
       Constexpr_specified(false),
-      StorageClassSpecAsWritten(SCS_unspecified),
       Attrs(attrFactory),
       ProtocolQualifiers(0),
       NumProtocolQualifiers(0),
@@ -493,6 +502,7 @@ public:
   SourceLocation getConstSpecLoc() const { return TQ_constLoc; }
   SourceLocation getRestrictSpecLoc() const { return TQ_restrictLoc; }
   SourceLocation getVolatileSpecLoc() const { return TQ_volatileLoc; }
+  SourceLocation getAtomicSpecLoc() const { return TQ_atomicLoc; }
 
   /// \brief Clear out all of the type qualifiers.
   void ClearTypeQualifiers() {
@@ -500,6 +510,7 @@ public:
     TQ_constLoc = SourceLocation();
     TQ_restrictLoc = SourceLocation();
     TQ_volatileLoc = SourceLocation();
+    TQ_atomicLoc = SourceLocation();
   }
 
   // function-specifier
@@ -512,6 +523,9 @@ public:
   bool isExplicitSpecified() const { return FS_explicit_specified; }
   SourceLocation getExplicitSpecLoc() const { return FS_explicitLoc; }
 
+  bool isNoreturnSpecified() const { return FS_noreturn_specified; }
+  SourceLocation getNoreturnSpecLoc() const { return FS_noreturnLoc; }
+
   void ClearFunctionSpecs() {
     FS_inline_specified = false;
     FS_inlineLoc = SourceLocation();
@@ -519,6 +533,8 @@ public:
     FS_virtualLoc = SourceLocation();
     FS_explicit_specified = false;
     FS_explicitLoc = SourceLocation();
+    FS_noreturn_specified = false;
+    FS_noreturnLoc = SourceLocation();
   }
 
   /// \brief Return true if any type-specifier has been found.
@@ -533,10 +549,6 @@ public:
   /// DeclSpec includes.
   unsigned getParsedSpecifiers() const;
 
-  SCS getStorageClassSpecAsWritten() const {
-    return (SCS)StorageClassSpecAsWritten;
-  }
-
   /// isEmpty - Return true if this declaration specifier is completely empty:
   /// no tokens were parsed in the production of it.
   bool isEmpty() const {
@@ -602,12 +614,10 @@ public:
   bool SetTypeQual(TQ T, SourceLocation Loc, const char *&PrevSpec,
                    unsigned &DiagID, const LangOptions &Lang);
 
-  bool SetFunctionSpecInline(SourceLocation Loc, const char *&PrevSpec,
-                             unsigned &DiagID);
-  bool SetFunctionSpecVirtual(SourceLocation Loc, const char *&PrevSpec,
-                              unsigned &DiagID);
-  bool SetFunctionSpecExplicit(SourceLocation Loc, const char *&PrevSpec,
-                               unsigned &DiagID);
+  bool setFunctionSpecInline(SourceLocation Loc);
+  bool setFunctionSpecVirtual(SourceLocation Loc);
+  bool setFunctionSpecExplicit(SourceLocation Loc);
+  bool setFunctionSpecNoreturn(SourceLocation Loc);
 
   bool SetFriendSpec(SourceLocation Loc, const char *&PrevSpec,
                      unsigned &DiagID);
@@ -808,6 +818,20 @@ public:
     IK_ImplicitSelfParam
   } Kind;
 
+  struct OFI {
+    /// \brief The kind of overloaded operator.
+    OverloadedOperatorKind Operator;
+
+    /// \brief The source locations of the individual tokens that name
+    /// the operator, e.g., the "new", "[", and "]" tokens in 
+    /// operator new []. 
+    ///
+    /// Different operators have different numbers of tokens in their name,
+    /// up to three. Any remaining source locations in this array will be
+    /// set to an invalid value for operators with fewer than three tokens.
+    unsigned SymbolLocations[3];
+  };
+
   /// \brief Anonymous union that holds extra data associated with the
   /// parsed unqualified-id.
   union {
@@ -817,19 +841,7 @@ public:
     
     /// \brief When Kind == IK_OperatorFunctionId, the overloaded operator
     /// that we parsed.
-    struct {
-      /// \brief The kind of overloaded operator.
-      OverloadedOperatorKind Operator;
-      
-      /// \brief The source locations of the individual tokens that name
-      /// the operator, e.g., the "new", "[", and "]" tokens in 
-      /// operator new []. 
-      ///
-      /// Different operators have different numbers of tokens in their name,
-      /// up to three. Any remaining source locations in this array will be
-      /// set to an invalid value for operators with fewer than three tokens.
-      unsigned SymbolLocations[3];
-    } OperatorFunctionId;
+    struct OFI OperatorFunctionId;
     
     /// \brief When Kind == IK_ConversionFunctionId, the type that the 
     /// conversion function names.
@@ -1010,8 +1022,8 @@ struct DeclaratorChunk {
   };
 
   struct PointerTypeInfo : TypeInfoCommon {
-    /// The type qualifiers: const/volatile/restrict.
-    unsigned TypeQuals : 3;
+    /// The type qualifiers: const/volatile/restrict/atomic.
+    unsigned TypeQuals : 4;
 
     /// The location of the const-qualifier, if any.
     unsigned ConstQualLoc;
@@ -1022,6 +1034,9 @@ struct DeclaratorChunk {
     /// The location of the restrict-qualifier, if any.
     unsigned RestrictQualLoc;
 
+    /// The location of the _Atomic-qualifier, if any.
+    unsigned AtomicQualLoc;
+
     void destroy() {
     }
   };
@@ -1036,8 +1051,8 @@ struct DeclaratorChunk {
   };
 
   struct ArrayTypeInfo : TypeInfoCommon {
-    /// The type qualifiers for the array: const/volatile/restrict.
-    unsigned TypeQuals : 3;
+    /// The type qualifiers for the array: const/volatile/restrict/_Atomic.
+    unsigned TypeQuals : 4;
 
     /// True if this dimension included the 'static' keyword.
     bool hasStatic : 1;
@@ -1259,16 +1274,16 @@ struct DeclaratorChunk {
 
   struct BlockPointerTypeInfo : TypeInfoCommon {
     /// For now, sema will catch these as invalid.
-    /// The type qualifiers: const/volatile/restrict.
-    unsigned TypeQuals : 3;
+    /// The type qualifiers: const/volatile/restrict/_Atomic.
+    unsigned TypeQuals : 4;
 
     void destroy() {
     }
   };
 
   struct MemberPointerTypeInfo : TypeInfoCommon {
-    /// The type qualifiers: const/volatile/restrict.
-    unsigned TypeQuals : 3;
+    /// The type qualifiers: const/volatile/restrict/_Atomic.
+    unsigned TypeQuals : 4;
     // CXXScopeSpec has a constructor, so it can't be a direct member.
     // So we need some pointer-aligned storage and a bit of trickery.
     union {
@@ -1422,6 +1437,9 @@ struct DeclaratorChunk {
     return I;
   }
 
+  bool isParen() const {
+    return Kind == Paren;
+  }
 };
 
 /// \brief Described the kind of function definition (if any) provided for
@@ -1783,33 +1801,41 @@ public:
     return DeclTypeInfo[i];
   }
 
-  void DropFirstTypeObject()
-  {
+  void DropFirstTypeObject() {
     assert(!DeclTypeInfo.empty() && "No type chunks to drop.");
     DeclTypeInfo.front().destroy();
     DeclTypeInfo.erase(DeclTypeInfo.begin());
   }
 
+  /// Return the innermost (closest to the declarator) chunk of this
+  /// declarator that is not a parens chunk, or null if there are no
+  /// non-parens chunks.
+  const DeclaratorChunk *getInnermostNonParenChunk() const {
+    for (unsigned i = 0, i_end = DeclTypeInfo.size(); i < i_end; ++i) {
+      if (!DeclTypeInfo[i].isParen())
+        return &DeclTypeInfo[i];
+    }
+    return 0;
+  }
+
+  /// Return the outermost (furthest from the declarator) chunk of
+  /// this declarator that is not a parens chunk, or null if there are
+  /// no non-parens chunks.
+  const DeclaratorChunk *getOutermostNonParenChunk() const {
+    for (unsigned i = DeclTypeInfo.size(), i_end = 0; i != i_end; --i) {
+      if (!DeclTypeInfo[i-1].isParen())
+        return &DeclTypeInfo[i-1];
+    }
+    return 0;
+  }
+
   /// isArrayOfUnknownBound - This method returns true if the declarator
   /// is a declarator for an array of unknown bound (looking through
   /// parentheses).
   bool isArrayOfUnknownBound() const {
-    for (unsigned i = 0, i_end = DeclTypeInfo.size(); i < i_end; ++i) {
-      switch (DeclTypeInfo[i].Kind) {
-      case DeclaratorChunk::Paren:
-        continue;
-      case DeclaratorChunk::Function:
-      case DeclaratorChunk::Pointer:
-      case DeclaratorChunk::Reference:
-      case DeclaratorChunk::BlockPointer:
-      case DeclaratorChunk::MemberPointer:
-        return false;
-      case DeclaratorChunk::Array:
-        return !DeclTypeInfo[i].Arr.NumElts;
-      }
-      llvm_unreachable("Invalid type chunk");
-    }
-    return false;
+    const DeclaratorChunk *chunk = getInnermostNonParenChunk();
+    return (chunk && chunk->Kind == DeclaratorChunk::Array &&
+            !chunk->Arr.NumElts);
   }
 
   /// isFunctionDeclarator - This method returns true if the declarator
@@ -1866,7 +1892,54 @@ public:
   /// isn't a function declarator, if the type specifier refers to a function
   /// type. This routine checks for both cases.
   bool isDeclarationOfFunction() const;
+
+  /// \brief Return true if this declaration appears in a context where a
+  /// function declarator would be a function declaration.
+  bool isFunctionDeclarationContext() const {
+    if (getDeclSpec().getStorageClassSpec() == DeclSpec::SCS_typedef)
+      return false;
+
+    switch (Context) {
+    case FileContext:
+    case MemberContext:
+    case BlockContext:
+      return true;
+
+    case ForContext:
+    case ConditionContext:
+    case KNRTypeListContext:
+    case TypeNameContext:
+    case AliasDeclContext:
+    case AliasTemplateContext:
+    case PrototypeContext:
+    case ObjCParameterContext:
+    case ObjCResultContext:
+    case TemplateParamContext:
+    case CXXNewContext:
+    case CXXCatchContext:
+    case ObjCCatchContext:
+    case BlockLiteralContext:
+    case LambdaExprContext:
+    case TemplateTypeArgContext:
+    case TrailingReturnContext:
+      return false;
+    }
+    llvm_unreachable("unknown context kind!");
+  }
   
+  /// \brief Return true if a function declarator at this position would be a
+  /// function declaration.
+  bool isFunctionDeclaratorAFunctionDeclaration() const {
+    if (!isFunctionDeclarationContext())
+      return false;
+
+    for (unsigned I = 0, N = getNumTypeObjects(); I != N; ++I)
+      if (getTypeObject(I).Kind != DeclaratorChunk::Paren)
+        return false;
+
+    return true;
+  }
+
   /// takeAttributes - Takes attributes from the given parsed-attributes
   /// set and add them to this declarator.
   ///
@@ -1897,6 +1970,17 @@ public:
     return false;
   }
 
+  /// \brief Return a source range list of C++11 attributes associated
+  /// with the declarator.
+  void getCXX11AttributeRanges(SmallVector<SourceRange, 4> &Ranges) {
+    AttributeList *AttrList = Attrs.getList();
+    while (AttrList) {
+      if (AttrList->isCXX11Attribute())
+        Ranges.push_back(AttrList->getRange());
+      AttrList = AttrList->getNext();
+    }
+  }
+
   void setAsmLabel(Expr *E) { AsmLabel = E; }
   Expr *getAsmLabel() const { return AsmLabel; }
 
@@ -1996,7 +2080,7 @@ struct LambdaIntroducer {
   SourceRange Range;
   SourceLocation DefaultLoc;
   LambdaCaptureDefault Default;
-  llvm::SmallVector<LambdaCapture, 4> Captures;
+  SmallVector<LambdaCapture, 4> Captures;
 
   LambdaIntroducer()
     : Default(LCD_None) {}
diff --git a/include/clang/Sema/DelayedDiagnostic.h b/include/clang/Sema/DelayedDiagnostic.h
index a20480c..3704e09 100644
--- a/include/clang/Sema/DelayedDiagnostic.h
+++ b/include/clang/Sema/DelayedDiagnostic.h
@@ -199,21 +199,25 @@ public:
   }
   
 private:
+
+  struct DD {
+    const NamedDecl *Decl;
+    const ObjCInterfaceDecl *UnknownObjCClass;
+    const ObjCPropertyDecl  *ObjCProperty;
+    const char *Message;
+    size_t MessageLen;
+  };
+
+  struct FTD {
+    unsigned Diagnostic;
+    unsigned Argument;
+    void *OperandType;
+  };
+
   union {
-    /// Deprecation.
-    struct {
-      const NamedDecl *Decl;
-      const ObjCInterfaceDecl *UnknownObjCClass;
-      const ObjCPropertyDecl  *ObjCProperty;
-      const char *Message;
-      size_t MessageLen;
-    } DeprecationData;
-
-    struct {
-      unsigned Diagnostic;
-      unsigned Argument;
-      void *OperandType;
-    } ForbiddenTypeData;
+    /// Deprecation
+    struct DD DeprecationData;
+    struct FTD ForbiddenTypeData;
 
     /// Access control.
     char AccessData[sizeof(AccessedEntity)];
@@ -224,14 +228,14 @@ private:
 /// delayed.
 class DelayedDiagnosticPool {
   const DelayedDiagnosticPool *Parent;
-  llvm::SmallVector<DelayedDiagnostic, 4> Diagnostics;
+  SmallVector<DelayedDiagnostic, 4> Diagnostics;
 
   DelayedDiagnosticPool(const DelayedDiagnosticPool &) LLVM_DELETED_FUNCTION;
   void operator=(const DelayedDiagnosticPool &) LLVM_DELETED_FUNCTION;
 public:
   DelayedDiagnosticPool(const DelayedDiagnosticPool *parent) : Parent(parent) {}
   ~DelayedDiagnosticPool() {
-    for (llvm::SmallVectorImpl<DelayedDiagnostic>::iterator
+    for (SmallVectorImpl<DelayedDiagnostic>::iterator
            i = Diagnostics.begin(), e = Diagnostics.end(); i != e; ++i)
       i->Destroy();
   }
@@ -260,8 +264,7 @@ public:
     pool.Diagnostics.clear();
   }
 
-  typedef llvm::SmallVectorImpl<DelayedDiagnostic>::const_iterator
-    pool_iterator;
+  typedef SmallVectorImpl<DelayedDiagnostic>::const_iterator pool_iterator;
   pool_iterator pool_begin() const { return Diagnostics.begin(); }
   pool_iterator pool_end() const { return Diagnostics.end(); }
   bool pool_empty() const { return Diagnostics.empty(); }
diff --git a/include/clang/Sema/ExternalSemaSource.h b/include/clang/Sema/ExternalSemaSource.h
index 7a59849..cbce757 100644
--- a/include/clang/Sema/ExternalSemaSource.h
+++ b/include/clang/Sema/ExternalSemaSource.h
@@ -15,6 +15,7 @@
 
 #include "clang/AST/ExternalASTSource.h"
 #include "clang/Sema/Weak.h"
+#include "llvm/ADT/MapVector.h"
 #include <utility>
 
 namespace clang {
@@ -65,7 +66,12 @@ public:
   /// which will be used during typo correction.
   virtual void ReadKnownNamespaces(
                            SmallVectorImpl<NamespaceDecl *> &Namespaces);
-  
+
+  /// \brief Load the set of used but not defined functions or variables with
+  /// internal linkage, or used but not defined internal functions.
+  virtual void ReadUndefinedButUsed(
+                         llvm::DenseMap<NamedDecl*, SourceLocation> &Undefined);
+
   /// \brief Do last resort, unqualified lookup on a LookupResult that
   /// Sema cannot find.
   ///
@@ -130,7 +136,7 @@ public:
   /// declarations to the given vector of declarations. Note that this routine 
   /// may be invoked multiple times; the external source should take care not 
   /// to introduce the same declarations repeatedly.
-  virtual void ReadLocallyScopedExternalDecls(
+  virtual void ReadLocallyScopedExternCDecls(
                  SmallVectorImpl<NamedDecl *> &Decls) {}
 
   /// \brief Read the set of referenced selectors known to the
diff --git a/include/clang/Sema/IdentifierResolver.h b/include/clang/Sema/IdentifierResolver.h
index dff0134..0b1b74a 100644
--- a/include/clang/Sema/IdentifierResolver.h
+++ b/include/clang/Sema/IdentifierResolver.h
@@ -158,8 +158,7 @@ public:
   /// \param ExplicitInstantiationOrSpecialization When true, we are checking
   /// whether the declaration is in scope for the purposes of explicit template
   /// instantiation or specialization. The default is false.
-  bool isDeclInScope(Decl *D, DeclContext *Ctx, ASTContext &Context,
-                     Scope *S = 0,
+  bool isDeclInScope(Decl *D, DeclContext *Ctx, Scope *S = 0,
                      bool ExplicitInstantiationOrSpecialization = false) const;
 
   /// AddDecl - Link the decl to its shadowed decl chain.
diff --git a/include/clang/Sema/Initialization.h b/include/clang/Sema/Initialization.h
index 0b0af0c..8459be1 100644
--- a/include/clang/Sema/Initialization.h
+++ b/include/clang/Sema/Initialization.h
@@ -13,12 +13,13 @@
 #ifndef LLVM_CLANG_SEMA_INITIALIZATION_H
 #define LLVM_CLANG_SEMA_INITIALIZATION_H
 
-#include "clang/Sema/Ownership.h"
-#include "clang/Sema/Overload.h"
 #include "clang/AST/ASTContext.h"
+#include "clang/AST/Attr.h"
 #include "clang/AST/Type.h"
 #include "clang/AST/UnresolvedSet.h"
 #include "clang/Basic/SourceLocation.h"
+#include "clang/Sema/Overload.h"
+#include "clang/Sema/Ownership.h"
 #include "llvm/ADT/PointerIntPair.h"
 #include "llvm/ADT/SmallVector.h"
 #include <cassert>
@@ -87,7 +88,27 @@ private:
 
   /// \brief The type of the object or reference being initialized.
   QualType Type;
-  
+
+  struct LN {
+    /// \brief When Kind == EK_Result, EK_Exception, EK_New, the
+    /// location of the 'return', 'throw', or 'new' keyword,
+    /// respectively. When Kind == EK_Temporary, the location where
+    /// the temporary is being created.
+    unsigned Location;
+
+    /// \brief Whether the entity being initialized may end up using the
+    /// named return value optimization (NRVO).
+    bool NRVO;
+  };
+
+  struct C {
+    /// \brief The variable being captured by an EK_LambdaCapture.
+    VarDecl *Var;
+
+    /// \brief The source location at which the capture occurs.
+    unsigned Location;
+  };
+
   union {
     /// \brief When Kind == EK_Variable, or EK_Member, the VarDecl or
     /// FieldDecl, respectively.
@@ -100,18 +121,8 @@ private:
     /// \brief When Kind == EK_Temporary, the type source information for
     /// the temporary.
     TypeSourceInfo *TypeInfo;
-    
-    struct {
-      /// \brief When Kind == EK_Result, EK_Exception, EK_New, the
-      /// location of the 'return', 'throw', or 'new' keyword,
-      /// respectively. When Kind == EK_Temporary, the location where
-      /// the temporary is being created.
-      unsigned Location;
-      
-      /// \brief Whether the entity being initialized may end up using the
-      /// named return value optimization (NRVO).
-      bool NRVO;
-    } LocAndNRVO;
+
+    struct LN LocAndNRVO;
     
     /// \brief When Kind == EK_Base, the base specifier that provides the 
     /// base class. The lower bit specifies whether the base is an inherited
@@ -122,14 +133,8 @@ private:
     /// EK_ComplexElement, the index of the array or vector element being
     /// initialized. 
     unsigned Index;
-    
-    struct {
-      /// \brief The variable being captured by an EK_LambdaCapture.
-      VarDecl *Var;
-      
-      /// \brief The source location at which the capture occurs.
-      unsigned Location;
-    } Capture;
+
+    struct C Capture;
   };
 
   InitializedEntity() { }
@@ -172,17 +177,25 @@ public:
   static InitializedEntity InitializeVariable(VarDecl *Var) {
     return InitializedEntity(Var);
   }
-  
+
   /// \brief Create the initialization entity for a parameter.
   static InitializedEntity InitializeParameter(ASTContext &Context,
                                                ParmVarDecl *Parm) {
+    return InitializeParameter(Context, Parm, Parm->getType());
+  }
+
+  /// \brief Create the initialization entity for a parameter, but use
+  /// another type.
+  static InitializedEntity InitializeParameter(ASTContext &Context,
+                                               ParmVarDecl *Parm,
+                                               QualType Type) {
     bool Consumed = (Context.getLangOpts().ObjCAutoRefCount &&
                      Parm->hasAttr<NSConsumedAttr>());
 
     InitializedEntity Entity;
     Entity.Kind = EK_Parameter;
-    Entity.Type = Context.getVariableArrayDecayedType(
-                                       Parm->getType().getUnqualifiedType());
+    Entity.Type =
+      Context.getVariableArrayDecayedType(Type.getUnqualifiedType());
     Entity.Parent = 0;
     Entity.Parameter
       = (static_cast<uintptr_t>(Consumed) | reinterpret_cast<uintptr_t>(Parm));
@@ -615,7 +628,11 @@ public:
     /// \brief Produce an Objective-C object pointer.
     SK_ProduceObjCObject,
     /// \brief Construct a std::initializer_list from an initializer list.
-    SK_StdInitializerList
+    SK_StdInitializerList,
+    /// \brief Initialize an OpenCL sampler from an integer.
+    SK_OCLSamplerInit,
+    /// \brief Passing zero to a function where OpenCL event_t is expected.
+    SK_OCLZeroEvent
   };
   
   /// \brief A single step in the initialization sequence.
@@ -626,7 +643,13 @@ public:
     
     // \brief The type that results from this initialization.
     QualType Type;
-    
+
+    struct F {
+      bool HadMultipleCandidates;
+      FunctionDecl *Function;
+      DeclAccessPair FoundDecl;
+    };
+
     union {
       /// \brief When Kind == SK_ResolvedOverloadedFunction or Kind ==
       /// SK_UserConversion, the function that the expression should be 
@@ -638,11 +661,7 @@ public:
       /// selected from an overloaded set having size greater than 1.
       /// For conversion decls, the naming class is the source type.
       /// For construct decls, the naming class is the target type.
-      struct {
-        bool HadMultipleCandidates;
-        FunctionDecl *Function;
-        DeclAccessPair FoundDecl;
-      } Function;
+      struct F Function;
 
       /// \brief When Kind = SK_ConversionSequence, the implicit conversion
       /// sequence.
@@ -944,6 +963,14 @@ public:
   /// initializer list.
   void AddStdInitializerListConstructionStep(QualType T);
 
+  /// \brief Add a step to initialize an OpenCL sampler from an integer
+  /// constant.
+  void AddOCLSamplerInitStep(QualType T);
+
+  /// \brief Add a step to initialize an OpenCL event_t from a NULL
+  /// constant.
+  void AddOCLZeroEventStep(QualType T);
+
   /// \brief Add steps to unwrap a initializer list for a reference around a
   /// single element and rewrap it at the end.
   void RewrapReferenceInitList(QualType T, InitListExpr *Syntactic);
diff --git a/include/clang/Sema/Lookup.h b/include/clang/Sema/Lookup.h
index fe5d262..3e7e3a1 100644
--- a/include/clang/Sema/Lookup.h
+++ b/include/clang/Sema/Lookup.h
@@ -15,8 +15,8 @@
 #ifndef LLVM_CLANG_SEMA_LOOKUP_H
 #define LLVM_CLANG_SEMA_LOOKUP_H
 
-#include "clang/Sema/Sema.h"
 #include "clang/AST/DeclCXX.h"
+#include "clang/Sema/Sema.h"
 
 namespace clang {
 
@@ -138,7 +138,8 @@ public:
       IDNS(0),
       Redecl(Redecl != Sema::NotForRedeclaration),
       HideTags(true),
-      Diagnose(Redecl == Sema::NotForRedeclaration)
+      Diagnose(Redecl == Sema::NotForRedeclaration),
+      AllowHidden(Redecl == Sema::ForRedeclaration)
   {
     configure();
   }
@@ -158,7 +159,8 @@ public:
       IDNS(0),
       Redecl(Redecl != Sema::NotForRedeclaration),
       HideTags(true),
-      Diagnose(Redecl == Sema::NotForRedeclaration)
+      Diagnose(Redecl == Sema::NotForRedeclaration),
+      AllowHidden(Redecl == Sema::ForRedeclaration)
   {
     configure();
   }
@@ -176,7 +178,8 @@ public:
       IDNS(Other.IDNS),
       Redecl(Other.Redecl),
       HideTags(Other.HideTags),
-      Diagnose(false)
+      Diagnose(false),
+      AllowHidden(Other.AllowHidden)
   {}
 
   ~LookupResult() {
@@ -214,10 +217,16 @@ public:
     return Redecl;
   }
 
+  /// \brief Specify whether hidden declarations are visible, e.g.,
+  /// for recovery reasons.
+  void setAllowHidden(bool AH) {
+    AllowHidden = AH;
+  }
+
   /// \brief Determine whether this lookup is permitted to see hidden
   /// declarations, such as those in modules that have not yet been imported.
   bool isHiddenDeclarationVisible() const {
-    return Redecl || LookupKind == Sema::LookupTagName;
+    return AllowHidden || LookupKind == Sema::LookupTagName;
   }
   
   /// Sets whether tag declarations should be hidden by non-tag
@@ -483,6 +492,7 @@ public:
   /// \brief Change this lookup's redeclaration kind.
   void setRedeclarationKind(Sema::RedeclarationKind RK) {
     Redecl = RK;
+    AllowHidden = (RK == Sema::ForRedeclaration);
     configure();
   }
 
@@ -615,7 +625,7 @@ private:
 
   bool sanityCheckUnresolved() const {
     for (iterator I = begin(), E = end(); I != E; ++I)
-      if (isa<UnresolvedUsingValueDecl>(*I))
+      if (isa<UnresolvedUsingValueDecl>((*I)->getUnderlyingDecl()))
         return true;
     return false;
   }
@@ -644,6 +654,9 @@ private:
   bool HideTags;
 
   bool Diagnose;
+
+  /// \brief True if we should allow hidden declarations to be 'visible'.
+  bool AllowHidden;
 };
 
   /// \brief Consumes visible declarations found when searching for
diff --git a/include/clang/Sema/Makefile b/include/clang/Sema/Makefile
index f6662d6..7d658a7 100644
--- a/include/clang/Sema/Makefile
+++ b/include/clang/Sema/Makefile
@@ -1,6 +1,7 @@
 CLANG_LEVEL := ../../..
 TD_SRC_DIR = $(PROJ_SRC_DIR)/../Basic
-BUILT_SOURCES = AttrTemplateInstantiate.inc AttrParsedAttrList.inc AttrParsedAttrKinds.inc
+BUILT_SOURCES = AttrTemplateInstantiate.inc AttrParsedAttrList.inc AttrParsedAttrKinds.inc \
+        AttrSpellingListIndex.inc
 
 TABLEGEN_INC_FILES_COMMON = 1
 
@@ -24,4 +25,10 @@ $(ObjDir)/AttrParsedAttrKinds.inc.tmp : $(TD_SRC_DIR)/Attr.td \
 	$(Verb) $(ClangTableGen) -gen-clang-attr-parsed-attr-kinds -o \
 	  $(call SYSPATH, $@) -I $(PROJ_SRC_DIR)/../../ $<
 
+$(ObjDir)/AttrSpellingListIndex.inc.tmp : $(TD_SRC_DIR)/Attr.td \
+                                       $(CLANG_TBLGEN) $(ObjDir)/.dir
+	$(Echo) "Building Clang attribute spelling list index with tablegen"
+	$(Verb) $(ClangTableGen) -gen-clang-attr-spelling-index -o \
+	  $(call SYSPATH, $@) -I $(PROJ_SRC_DIR)/../../ $<
+
 
diff --git a/include/clang/Sema/MultiplexExternalSemaSource.h b/include/clang/Sema/MultiplexExternalSemaSource.h
index 1513aeb..ff87d05 100644
--- a/include/clang/Sema/MultiplexExternalSemaSource.h
+++ b/include/clang/Sema/MultiplexExternalSemaSource.h
@@ -15,9 +15,7 @@
 
 #include "clang/Sema/ExternalSemaSource.h"
 #include "clang/Sema/Weak.h"
-
 #include "llvm/ADT/SmallVector.h"
-
 #include <utility>
 
 namespace clang {
@@ -41,7 +39,7 @@ namespace clang {
 class MultiplexExternalSemaSource : public ExternalSemaSource {
 
 private:
-  llvm::SmallVector<ExternalSemaSource*, 2> Sources; // doesn't own them.
+  SmallVector<ExternalSemaSource *, 2> Sources; // doesn't own them.
 
 public:
   
@@ -67,58 +65,30 @@ public:
 
   /// \brief Resolve a declaration ID into a declaration, potentially
   /// building a new declaration.
-  ///
-  /// This method only needs to be implemented if the AST source ever
-  /// passes back decl sets as VisibleDeclaration objects.
-  ///
-  /// The default implementation of this method is a no-op.
   virtual Decl *GetExternalDecl(uint32_t ID);
 
   /// \brief Resolve a selector ID into a selector.
-  ///
-  /// This operation only needs to be implemented if the AST source
-  /// returns non-zero for GetNumKnownSelectors().
-  ///
-  /// The default implementation of this method is a no-op.
   virtual Selector GetExternalSelector(uint32_t ID);
 
   /// \brief Returns the number of selectors known to the external AST
   /// source.
-  ///
-  /// The default implementation of this method is a no-op.
   virtual uint32_t GetNumExternalSelectors();
 
   /// \brief Resolve the offset of a statement in the decl stream into
   /// a statement.
-  ///
-  /// This operation is meant to be used via a LazyOffsetPtr.  It only
-  /// needs to be implemented if the AST source uses methods like
-  /// FunctionDecl::setLazyBody when building decls.
-  ///
-  /// The default implementation of this method is a no-op.
   virtual Stmt *GetExternalDeclStmt(uint64_t Offset);
 
   /// \brief Resolve the offset of a set of C++ base specifiers in the decl
   /// stream into an array of specifiers.
-  ///
-  /// The default implementation of this method is a no-op.
   virtual CXXBaseSpecifier *GetExternalCXXBaseSpecifiers(uint64_t Offset);
 
-  /// \brief Finds all declarations with the given name in the
+  /// \brief Find all declarations with the given name in the
   /// given context.
-  ///
-  /// Generally the final step of this method is either to call
-  /// SetExternalVisibleDeclsForName or to recursively call lookup on
-  /// the DeclContext after calling SetExternalVisibleDecls.
-  ///
-  /// The default implementation of this method is a no-op.
-  virtual DeclContextLookupResult
+  virtual bool
   FindExternalVisibleDeclsByName(const DeclContext *DC, DeclarationName Name);
 
   /// \brief Ensures that the table of all visible declarations inside this
   /// context is up to date.
-  ///
-  /// The default implementation of this functino is a no-op.
   virtual void completeVisibleDeclsMap(const DeclContext *DC);
 
   /// \brief Finds all declarations lexically contained within the given
@@ -129,8 +99,6 @@ public:
   /// are returned.
   ///
   /// \return an indication of whether the load succeeded or failed.
-  ///
-  /// The default implementation of this method is a no-op.
   virtual ExternalLoadResult FindExternalLexicalDecls(const DeclContext *DC,
                                         bool (*isKindWeWant)(Decl::Kind),
                                         SmallVectorImpl<Decl*> &Result);
@@ -174,26 +142,18 @@ public:
   /// \brief Notify ExternalASTSource that we started deserialization of
   /// a decl or type so until FinishedDeserializing is called there may be
   /// decls that are initializing. Must be paired with FinishedDeserializing.
-  ///
-  /// The default implementation of this method is a no-op.
   virtual void StartedDeserializing();
 
   /// \brief Notify ExternalASTSource that we finished the deserialization of
   /// a decl or type. Must be paired with StartedDeserializing.
-  ///
-  /// The default implementation of this method is a no-op.
   virtual void FinishedDeserializing();
 
   /// \brief Function that will be invoked when we begin parsing a new
   /// translation unit involving this external AST source.
-  ///
-  /// The default implementation of this method is a no-op.
   virtual void StartTranslationUnit(ASTConsumer *Consumer);
 
   /// \brief Print any statistics that have been gathered regarding
   /// the external AST source.
-  ///
-  /// The default implementation of this method is a no-op.
   virtual void PrintStats();
   
   
@@ -254,6 +214,11 @@ public:
   /// \brief Load the set of namespaces that are known to the external source,
   /// which will be used during typo correction.
   virtual void ReadKnownNamespaces(SmallVectorImpl<NamespaceDecl*> &Namespaces);
+
+  /// \brief Load the set of used but not defined functions or variables with
+  /// internal linkage, or used but not defined inline functions.
+  virtual void ReadUndefinedButUsed(
+                         llvm::DenseMap<NamedDecl*, SourceLocation> &Undefined);
   
   /// \brief Do last resort, unqualified lookup on a LookupResult that
   /// Sema cannot find.
@@ -311,14 +276,14 @@ public:
   /// introduce the same declarations repeatedly.
   virtual void ReadDynamicClasses(SmallVectorImpl<CXXRecordDecl*> &Decls);
 
-  /// \brief Read the set of locally-scoped external declarations known to the
+  /// \brief Read the set of locally-scoped extern "C" declarations known to the
   /// external Sema source.
   ///
   /// The external source should append its own locally-scoped external
-  /// declarations to the given vector of declarations. Note that this routine 
-  /// may be invoked multiple times; the external source should take care not 
+  /// declarations to the given vector of declarations. Note that this routine
+  /// may be invoked multiple times; the external source should take care not
   /// to introduce the same declarations repeatedly.
-  virtual void ReadLocallyScopedExternalDecls(SmallVectorImpl<NamedDecl*>&Decls);
+  virtual void ReadLocallyScopedExternCDecls(SmallVectorImpl<NamedDecl*>&Decls);
 
   /// \brief Read the set of referenced selectors known to the
   /// external Sema source.
diff --git a/include/clang/Sema/Overload.h b/include/clang/Sema/Overload.h
index 65ed781..c685843 100644
--- a/include/clang/Sema/Overload.h
+++ b/include/clang/Sema/Overload.h
@@ -78,8 +78,9 @@ namespace clang {
     ICK_Vector_Splat,          ///< A vector splat from an arithmetic type
     ICK_Complex_Real,          ///< Complex-real conversions (C99 6.3.1.7)
     ICK_Block_Pointer_Conversion,    ///< Block Pointer conversions 
-    ICK_TransparentUnionConversion, /// Transparent Union Conversions
+    ICK_TransparentUnionConversion, ///< Transparent Union Conversions
     ICK_Writeback_Conversion,  ///< Objective-C ARC writeback conversion
+    ICK_Zero_Event_Conversion, ///< Zero constant to event (OpenCL1.2 6.12.10)
     ICK_Num_Conversion_Kinds   ///< The number of conversion kinds
   };
 
@@ -694,6 +695,10 @@ namespace clang {
       /// \brief Return the second template argument this deduction failure
       /// refers to, if any.
       const TemplateArgument *getSecondArg();
+
+      /// \brief Return the expression this deduction failure refers to,
+      /// if any.
+      Expr *getExpr();
       
       /// \brief Free any memory associated with this deduction failure.
       void Destroy();
@@ -809,7 +814,7 @@ namespace clang {
 
     void NoteCandidates(Sema &S,
                         OverloadCandidateDisplayKind OCD,
-                        llvm::ArrayRef<Expr *> Args,
+                        ArrayRef<Expr *> Args,
                         StringRef Opc = "",
                         SourceLocation Loc = SourceLocation());
   };
diff --git a/include/clang/Sema/Ownership.h b/include/clang/Sema/Ownership.h
index e59fb3f..e064b91 100644
--- a/include/clang/Sema/Ownership.h
+++ b/include/clang/Sema/Ownership.h
@@ -23,13 +23,10 @@
 //===----------------------------------------------------------------------===//
 
 namespace clang {
-  class Attr;
   class CXXCtorInitializer;
   class CXXBaseSpecifier;
   class Decl;
-  class DeclGroupRef;
   class Expr;
-  class NestedNameSpecifier;
   class ParsedTemplateArgument;
   class QualType;
   class Stmt;
diff --git a/include/clang/Sema/Scope.h b/include/clang/Sema/Scope.h
index 1329f97..d016b9b 100644
--- a/include/clang/Sema/Scope.h
+++ b/include/clang/Sema/Scope.h
@@ -32,70 +32,66 @@ public:
   /// ScopeFlags - These are bitfields that are or'd together when creating a
   /// scope, which defines the sorts of things the scope contains.
   enum ScopeFlags {
-    /// FnScope - This indicates that the scope corresponds to a function, which
+    /// \brief This indicates that the scope corresponds to a function, which
     /// means that labels are set here.
     FnScope       = 0x01,
 
-    /// BreakScope - This is a while,do,switch,for, etc that can have break
-    /// stmts embedded into it.
+    /// \brief This is a while, do, switch, for, etc that can have break
+    /// statements embedded into it.
     BreakScope    = 0x02,
 
-    /// ContinueScope - This is a while,do,for, which can have continue
-    /// stmt embedded into it.
+    /// \brief This is a while, do, for, which can have continue statements
+    /// embedded into it.
     ContinueScope = 0x04,
 
-    /// DeclScope - This is a scope that can contain a declaration.  Some scopes
+    /// \brief This is a scope that can contain a declaration.  Some scopes
     /// just contain loop constructs but don't contain decls.
     DeclScope = 0x08,
 
-    /// ControlScope - The controlling scope in a if/switch/while/for statement.
+    /// \brief The controlling scope in a if/switch/while/for statement.
     ControlScope = 0x10,
 
-    /// ClassScope - The scope of a struct/union/class definition.
+    /// \brief The scope of a struct/union/class definition.
     ClassScope = 0x20,
 
-    /// BlockScope - This is a scope that corresponds to a block/closure object.
+    /// \brief This is a scope that corresponds to a block/closure object.
     /// Blocks serve as top-level scopes for some objects like labels, they
     /// also prevent things like break and continue.  BlockScopes always have
     /// the FnScope and DeclScope flags set as well.
     BlockScope = 0x40,
 
-    /// TemplateParamScope - This is a scope that corresponds to the
+    /// \brief This is a scope that corresponds to the
     /// template parameters of a C++ template. Template parameter
     /// scope starts at the 'template' keyword and ends when the
     /// template declaration ends.
     TemplateParamScope = 0x80,
 
-    /// FunctionPrototypeScope - This is a scope that corresponds to the
+    /// \brief This is a scope that corresponds to the
     /// parameters within a function prototype.
     FunctionPrototypeScope = 0x100,
 
-    /// AtCatchScope - This is a scope that corresponds to the Objective-C
+    /// \brief This is a scope that corresponds to the parameters within
+    /// a function prototype for a function declaration (as opposed to any
+    /// other kind of function declarator). Always has FunctionPrototypeScope
+    /// set as well.
+    FunctionDeclarationScope = 0x200,
+
+    /// \brief This is a scope that corresponds to the Objective-C
     /// \@catch statement.
-    AtCatchScope = 0x200,
+    AtCatchScope = 0x400,
     
-    /// ObjCMethodScope - This scope corresponds to an Objective-C method body.
+    /// \brief This scope corresponds to an Objective-C method body.
     /// It always has FnScope and DeclScope set as well.
-    ObjCMethodScope = 0x400,
-
-    /// SwitchScope - This is a scope that corresponds to a switch statement.
-    SwitchScope = 0x800,
-
-    /// TryScope - This is the scope of a C++ try statement.
-    TryScope = 0x1000,
-
-    /// CatchScope - This is the scope of a C++ catch statement.
-    CatchScope = 0x2000,
+    ObjCMethodScope = 0x800,
 
-    /// FnTryCatchScope - This is the scope for a function-level C++ try or
-    /// catch scope.
-    FnTryCatchScope = 0x4000,
+    /// \brief This is a scope that corresponds to a switch statement.
+    SwitchScope = 0x1000,
 
-    /// FnTryScope - This is the scope of a function-level C++ try scope.
-    FnTryScope = TryScope | FnTryCatchScope,
+    /// \brief This is the scope of a C++ try statement.
+    TryScope = 0x2000,
 
-    /// FnCatchScope - This is the scope of a function-level C++ catch scope.
-    FnCatchScope = CatchScope | FnTryCatchScope
+    /// \brief This is the scope for a function-level C++ try or catch scope.
+    FnTryCatchScope = 0x4000
   };
 private:
   /// The parent scope for this scope.  This is null for the translation-unit
@@ -244,7 +240,11 @@ public:
   void setEntity(void *E) { Entity = E; }
 
   bool hasErrorOccurred() const { return ErrorTrap.hasErrorOccurred(); }
-                           
+
+  bool hasUnrecoverableErrorOccurred() const {
+    return ErrorTrap.hasUnrecoverableErrorOccurred();
+  }
+
   /// isClassScope - Return true if this scope is a class/struct/union scope.
   bool isClassScope() const {
     return (getFlags() & Scope::ClassScope);
diff --git a/include/clang/Sema/ScopeInfo.h b/include/clang/Sema/ScopeInfo.h
index feda9c9..2295bf4 100644
--- a/include/clang/Sema/ScopeInfo.h
+++ b/include/clang/Sema/ScopeInfo.h
@@ -91,6 +91,9 @@ public:
   /// \brief Whether this function contains any indirect gotos.
   bool HasIndirectGoto;
 
+  /// \brief Whether a statement was dropped because it was invalid.
+  bool HasDroppedStmt;
+
   /// A flag that is set when parsing a method that must call super's
   /// implementation, such as \c -dealloc, \c -finalize, or any method marked
   /// with \c __attribute__((objc_requires_super)).
@@ -287,9 +290,14 @@ public:
     HasIndirectGoto = true;
   }
 
+  void setHasDroppedStmt() {
+    HasDroppedStmt = true;
+  }
+
   bool NeedsScopeChecking() const {
-    return HasIndirectGoto ||
-          (HasBranchProtectedScope && HasBranchIntoScope);
+    return !HasDroppedStmt &&
+        (HasIndirectGoto ||
+          (HasBranchProtectedScope && HasBranchIntoScope));
   }
   
   FunctionScopeInfo(DiagnosticsEngine &Diag)
@@ -297,6 +305,7 @@ public:
       HasBranchProtectedScope(false),
       HasBranchIntoScope(false),
       HasIndirectGoto(false),
+      HasDroppedStmt(false),
       ObjCShouldCallSuper(false),
       ErrorTrap(Diag) { }
 
@@ -511,11 +520,11 @@ public:
   bool ContainsUnexpandedParameterPack;
 
   /// \brief Variables used to index into by-copy array captures.
-  llvm::SmallVector<VarDecl *, 4> ArrayIndexVars;
+  SmallVector<VarDecl *, 4> ArrayIndexVars;
 
   /// \brief Offsets into the ArrayIndexVars array at which each capture starts
   /// its list of array index variables.
-  llvm::SmallVector<unsigned, 4> ArrayIndexStarts;
+  SmallVector<unsigned, 4> ArrayIndexStarts;
   
   LambdaScopeInfo(DiagnosticsEngine &Diag, CXXRecordDecl *Lambda,
                   CXXMethodDecl *CallOperator)
diff --git a/include/clang/Sema/Sema.h b/include/clang/Sema/Sema.h
index 9b572d8..5b93e51 100644
--- a/include/clang/Sema/Sema.h
+++ b/include/clang/Sema/Sema.h
@@ -15,27 +15,30 @@
 #ifndef LLVM_CLANG_SEMA_SEMA_H
 #define LLVM_CLANG_SEMA_SEMA_H
 
-#include "clang/Sema/Ownership.h"
-#include "clang/Sema/AnalysisBasedWarnings.h"
-#include "clang/Sema/IdentifierResolver.h"
-#include "clang/Sema/ObjCMethodList.h"
-#include "clang/Sema/DeclSpec.h"
-#include "clang/Sema/ExternalSemaSource.h"
-#include "clang/Sema/LocInfoType.h"
-#include "clang/Sema/TypoCorrection.h"
-#include "clang/Sema/Weak.h"
+#include "clang/AST/Attr.h"
+#include "clang/AST/DeclarationName.h"
 #include "clang/AST/Expr.h"
 #include "clang/AST/ExprObjC.h"
-#include "clang/AST/DeclarationName.h"
 #include "clang/AST/ExternalASTSource.h"
 #include "clang/AST/LambdaMangleContext.h"
-#include "clang/AST/TypeLoc.h"
 #include "clang/AST/NSAPI.h"
-#include "clang/Lex/ModuleLoader.h"
+#include "clang/AST/PrettyPrinter.h"
+#include "clang/AST/TypeLoc.h"
+#include "clang/Basic/ExpressionTraits.h"
+#include "clang/Basic/LangOptions.h"
 #include "clang/Basic/Specifiers.h"
 #include "clang/Basic/TemplateKinds.h"
 #include "clang/Basic/TypeTraits.h"
-#include "clang/Basic/ExpressionTraits.h"
+#include "clang/Lex/ModuleLoader.h"
+#include "clang/Sema/AnalysisBasedWarnings.h"
+#include "clang/Sema/DeclSpec.h"
+#include "clang/Sema/ExternalSemaSource.h"
+#include "clang/Sema/IdentifierResolver.h"
+#include "clang/Sema/LocInfoType.h"
+#include "clang/Sema/ObjCMethodList.h"
+#include "clang/Sema/Ownership.h"
+#include "clang/Sema/TypoCorrection.h"
+#include "clang/Sema/Weak.h"
 #include "llvm/ADT/ArrayRef.h"
 #include "llvm/ADT/Optional.h"
 #include "llvm/ADT/OwningPtr.h"
@@ -129,6 +132,7 @@ namespace clang {
   class ObjCMethodDecl;
   class ObjCPropertyDecl;
   class ObjCProtocolDecl;
+  class OMPThreadPrivateDecl;
   class OverloadCandidateSet;
   class OverloadExpr;
   class ParenListExpr;
@@ -197,6 +201,8 @@ class Sema {
   ///\brief Whether Sema has generated a multiplexer and has to delete it.
   bool isMultiplexExternalSource;
 
+  static bool mightHaveNonExternalLinkage(const DeclaratorDecl *FD);
+
 public:
   typedef OpaquePtr<DeclGroupRef> DeclGroupPtrTy;
   typedef OpaquePtr<TemplateName> TemplateTy;
@@ -253,7 +259,7 @@ public:
   /// element type here is ExprWithCleanups::Object.
   SmallVector<BlockDecl*, 8> ExprCleanupObjects;
 
-  llvm::SmallPtrSet<Expr*, 8> MaybeODRUseExprs;
+  llvm::SmallPtrSet<Expr*, 2> MaybeODRUseExprs;
 
   /// \brief Stack containing information about each of the nested
   /// function, block, and method scopes that are currently active.
@@ -272,12 +278,6 @@ public:
   /// This is only necessary for issuing pretty diagnostics.
   ExtVectorDeclsType ExtVectorDecls;
 
-  /// \brief The set of types for which we have already complained about the
-  /// definitions being hidden.
-  ///
-  /// This set is used to suppress redundant diagnostics.
-  llvm::SmallPtrSet<NamedDecl *, 4> HiddenDefinitions;
-
   /// FieldCollector - Collects CXXFieldDecls during parsing of C++ classes.
   OwningPtr<CXXFieldCollector> FieldCollector;
 
@@ -298,35 +298,35 @@ public:
   llvm::SmallPtrSet<const Decl*, 4> ParsingInitForAutoVars;
 
   /// \brief A mapping from external names to the most recent
-  /// locally-scoped external declaration with that name.
+  /// locally-scoped extern "C" declaration with that name.
   ///
   /// This map contains external declarations introduced in local
-  /// scoped, e.g.,
+  /// scopes, e.g.,
   ///
   /// \code
-  /// void f() {
+  /// extern "C" void f() {
   ///   void foo(int, int);
   /// }
   /// \endcode
   ///
-  /// Here, the name "foo" will be associated with the declaration on
+  /// Here, the name "foo" will be associated with the declaration of
   /// "foo" within f. This name is not visible outside of
   /// "f". However, we still find it in two cases:
   ///
-  ///   - If we are declaring another external with the name "foo", we
-  ///     can find "foo" as a previous declaration, so that the types
-  ///     of this external declaration can be checked for
-  ///     compatibility.
+  ///   - If we are declaring another global or extern "C" entity with
+  ///     the name "foo", we can find "foo" as a previous declaration,
+  ///     so that the types of this external declaration can be checked
+  ///     for compatibility.
   ///
   ///   - If we would implicitly declare "foo" (e.g., due to a call to
   ///     "foo" in C when no prototype or definition is visible), then
   ///     we find this declaration of "foo" and complain that it is
   ///     not visible.
-  llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternalDecls;
+  llvm::DenseMap<DeclarationName, NamedDecl *> LocallyScopedExternCDecls;
 
-  /// \brief Look for a locally scoped external declaration by the given name.
+  /// \brief Look for a locally scoped extern "C" declaration by the given name.
   llvm::DenseMap<DeclarationName, NamedDecl *>::iterator
-  findLocallyScopedExternalDecl(DeclarationName Name);
+  findLocallyScopedExternCDecl(DeclarationName Name);
 
   typedef LazyVector<VarDecl *, ExternalSemaSource,
                      &ExternalSemaSource::ReadTentativeDefinitions, 2, 2>
@@ -363,6 +363,16 @@ public:
                               const CXXDestructorDecl*>, 2>
       DelayedDestructorExceptionSpecChecks;
 
+  /// \brief All the members seen during a class definition which were both
+  /// explicitly defaulted and had explicitly-specified exception
+  /// specifications, along with the function type containing their
+  /// user-specified exception specification. Those exception specifications
+  /// were overridden with the default specifications, but we still need to
+  /// check whether they are compatible with the default specification, and
+  /// we can't do that until the nesting set of class definitions is complete.
+  SmallVector<std::pair<CXXMethodDecl*, const FunctionProtoType*>, 2>
+    DelayedDefaultedMemberExceptionSpecs;
+
   /// \brief Callback to the parser to parse templated functions when needed.
   typedef void LateTemplateParserCB(void *P, const FunctionDecl *FD);
   LateTemplateParserCB *LateTemplateParser;
@@ -533,7 +543,7 @@ public:
   RecordDecl *MSVCGuidDecl;
 
   /// \brief Caches identifiers/selectors for NSFoundation APIs.
-  llvm::OwningPtr<NSAPI> NSAPIObj;
+  OwningPtr<NSAPI> NSAPIObj;
 
   /// \brief The declaration of the Objective-C NSNumber class.
   ObjCInterfaceDecl *NSNumberDecl;
@@ -568,6 +578,9 @@ public:
   /// \brief id<NSCopying> type.
   QualType QIDNSCopying;
 
+  /// \brief will hold 'respondsToSelector:'
+  Selector RespondsToSelectorSel;
+  
   /// A flag to remember whether the implicit forms of operator new and delete
   /// have been declared.
   bool GlobalNewDeleteDeclared;
@@ -619,11 +632,11 @@ public:
     /// this expression evaluation context.
     unsigned NumCleanupObjects;
 
-    llvm::SmallPtrSet<Expr*, 8> SavedMaybeODRUseExprs;
+    llvm::SmallPtrSet<Expr*, 2> SavedMaybeODRUseExprs;
 
     /// \brief The lambdas that are present within this context, if it
     /// is indeed an unevaluated context.
-    llvm::SmallVector<LambdaExpr *, 2> Lambdas;
+    SmallVector<LambdaExpr *, 2> Lambdas;
 
     /// \brief The declaration that provides context for the lambda expression
     /// if the normal declaration context does not suffice, e.g., in a
@@ -635,15 +648,15 @@ public:
     ///
     /// This mangling information is allocated lazily, since most contexts
     /// do not have lambda expressions.
-    LambdaMangleContext *LambdaMangle;
+    IntrusiveRefCntPtr<LambdaMangleContext> LambdaMangle;
 
     /// \brief If we are processing a decltype type, a set of call expressions
     /// for which we have deferred checking the completeness of the return type.
-    llvm::SmallVector<CallExpr*, 8> DelayedDecltypeCalls;
+    SmallVector<CallExpr *, 8> DelayedDecltypeCalls;
 
     /// \brief If we are processing a decltype type, a set of temporary binding
     /// expressions for which we have deferred checking the destructor.
-    llvm::SmallVector<CXXBindTemporaryExpr*, 8> DelayedDecltypeBinds;
+    SmallVector<CXXBindTemporaryExpr *, 8> DelayedDecltypeBinds;
 
     ExpressionEvaluationContextRecord(ExpressionEvaluationContext Context,
                                       unsigned NumCleanupObjects,
@@ -654,10 +667,6 @@ public:
         IsDecltype(IsDecltype), NumCleanupObjects(NumCleanupObjects),
         LambdaContextDecl(LambdaContextDecl), LambdaMangle() { }
 
-    ~ExpressionEvaluationContextRecord() {
-      delete LambdaMangle;
-    }
-
     /// \brief Retrieve the mangling context for lambdas.
     LambdaMangleContext &getLambdaMangleContext() {
       assert(LambdaContextDecl && "Need to have a lambda context declaration");
@@ -730,11 +739,15 @@ public:
 
   // Contains the locations of the beginning of unparsed default
   // argument locations.
-  llvm::DenseMap<ParmVarDecl *,SourceLocation> UnparsedDefaultArgLocs;
+  llvm::DenseMap<ParmVarDecl *, SourceLocation> UnparsedDefaultArgLocs;
+
+  /// UndefinedInternals - all the used, undefined objects which require a
+  /// definition in this translation unit.
+  llvm::DenseMap<NamedDecl *, SourceLocation> UndefinedButUsed;
 
-  /// UndefinedInternals - all the used, undefined objects with
-  /// internal linkage in this translation unit.
-  llvm::DenseMap<NamedDecl*, SourceLocation> UndefinedInternals;
+  /// Obtain a sorted list of functions that are undefined but ODR-used.
+  void getUndefinedButUsed(
+    llvm::SmallVectorImpl<std::pair<NamedDecl *, SourceLocation> > &Undefined);
 
   typedef std::pair<ObjCMethodList, ObjCMethodList> GlobalMethods;
   typedef llvm::DenseMap<Selector, GlobalMethods> GlobalMethodPool;
@@ -749,6 +762,24 @@ public:
   /// of -Wselector.
   llvm::DenseMap<Selector, SourceLocation> ReferencedSelectors;
 
+  /// Kinds of C++ special members.
+  enum CXXSpecialMember {
+    CXXDefaultConstructor,
+    CXXCopyConstructor,
+    CXXMoveConstructor,
+    CXXCopyAssignment,
+    CXXMoveAssignment,
+    CXXDestructor,
+    CXXInvalid
+  };
+
+  typedef std::pair<CXXRecordDecl*, CXXSpecialMember> SpecialMemberDecl;
+
+  /// The C++ special members which we are currently in the process of
+  /// declaring. If this process recursively triggers the declaration of the
+  /// same special member, we should act as if it is not yet declared.
+  llvm::SmallSet<SpecialMemberDecl, 4> SpecialMembersBeingDeclared;
+
   void ReadMethodPool(Selector Sel);
 
   /// Private Helper predicate to check for 'self'.
@@ -903,10 +934,10 @@ public:
   // Type Analysis / Processing: SemaType.cpp.
   //
 
-  QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs);
-  QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVR) {
-    return BuildQualifiedType(T, Loc, Qualifiers::fromCVRMask(CVR));
-  }
+  QualType BuildQualifiedType(QualType T, SourceLocation Loc, Qualifiers Qs,
+                              const DeclSpec *DS = 0);
+  QualType BuildQualifiedType(QualType T, SourceLocation Loc, unsigned CVRA,
+                              const DeclSpec *DS = 0);
   QualType BuildPointerType(QualType T,
                             SourceLocation Loc, DeclarationName Entity);
   QualType BuildReferenceType(QualType T, bool LValueRef,
@@ -916,12 +947,39 @@ public:
                           SourceRange Brackets, DeclarationName Entity);
   QualType BuildExtVectorType(QualType T, Expr *ArraySize,
                               SourceLocation AttrLoc);
+
+  /// \brief Build a function type.
+  ///
+  /// This routine checks the function type according to C++ rules and
+  /// under the assumption that the result type and parameter types have
+  /// just been instantiated from a template. It therefore duplicates
+  /// some of the behavior of GetTypeForDeclarator, but in a much
+  /// simpler form that is only suitable for this narrow use case.
+  ///
+  /// \param T The return type of the function.
+  ///
+  /// \param ParamTypes The parameter types of the function. This array
+  /// will be modified to account for adjustments to the types of the
+  /// function parameters.
+  ///
+  /// \param Loc The location of the entity whose type involves this
+  /// function type or, if there is no such entity, the location of the
+  /// type that will have function type.
+  ///
+  /// \param Entity The name of the entity that involves the function
+  /// type, if known.
+  ///
+  /// \param EPI Extra information about the function type. Usually this will
+  /// be taken from an existing function with the same prototype.
+  ///
+  /// \returns A suitable function type, if there are no errors. The
+  /// unqualified type will always be a FunctionProtoType.
+  /// Otherwise, returns a NULL type.
   QualType BuildFunctionType(QualType T,
-                             QualType *ParamTypes, unsigned NumParamTypes,
-                             bool Variadic, bool HasTrailingReturn,
-                             unsigned Quals, RefQualifierKind RefQualifier,
+                             llvm::MutableArrayRef<QualType> ParamTypes,
                              SourceLocation Loc, DeclarationName Entity,
-                             FunctionType::ExtInfo Info);
+                             const FunctionProtoType::ExtProtoInfo &EPI);
+
   QualType BuildMemberPointerType(QualType T, QualType Class,
                                   SourceLocation Loc,
                                   DeclarationName Entity);
@@ -943,7 +1001,7 @@ public:
   CanThrowResult canThrow(const Expr *E);
   const FunctionProtoType *ResolveExceptionSpec(SourceLocation Loc,
                                                 const FunctionProtoType *FPT);
-  bool CheckSpecifiedExceptionType(QualType T, const SourceRange &Range);
+  bool CheckSpecifiedExceptionType(QualType &T, const SourceRange &Range);
   bool CheckDistantExceptionSpec(QualType T);
   bool CheckEquivalentExceptionSpec(FunctionDecl *Old, FunctionDecl *New);
   bool CheckEquivalentExceptionSpec(
@@ -1291,8 +1349,8 @@ public:
 
   Decl *ActOnDeclarator(Scope *S, Declarator &D);
 
-  Decl *HandleDeclarator(Scope *S, Declarator &D,
-                         MultiTemplateParamsArg TemplateParameterLists);
+  NamedDecl *HandleDeclarator(Scope *S, Declarator &D,
+                              MultiTemplateParamsArg TemplateParameterLists);
   void RegisterLocallyScopedExternCDecl(NamedDecl *ND,
                                         const LookupResult &Previous,
                                         Scope *S);
@@ -1300,7 +1358,7 @@ public:
   bool diagnoseQualifiedDeclaration(CXXScopeSpec &SS, DeclContext *DC,
                                     DeclarationName Name,
                                     SourceLocation Loc);
-  void DiagnoseFunctionSpecifiers(Declarator& D);
+  void DiagnoseFunctionSpecifiers(const DeclSpec &DS);
   void CheckShadow(Scope *S, VarDecl *D, const LookupResult& R);
   void CheckShadow(Scope *S, VarDecl *D);
   void CheckCastAlign(Expr *Op, QualType T, SourceRange TRange);
@@ -1317,6 +1375,7 @@ public:
   // Returns true if the variable declaration is a redeclaration
   bool CheckVariableDeclaration(VarDecl *NewVD, LookupResult &Previous);
   void CheckCompleteVariableDeclaration(VarDecl *var);
+  void MaybeSuggestAddingStaticToDecl(const FunctionDecl *D);
   void ActOnStartFunctionDeclarator();
   void ActOnEndFunctionDeclarator();
   NamedDecl* ActOnFunctionDeclarator(Scope* S, Declarator& D, DeclContext* DC,
@@ -1343,7 +1402,7 @@ public:
   ParmVarDecl *CheckParameter(DeclContext *DC, SourceLocation StartLoc,
                               SourceLocation NameLoc, IdentifierInfo *Name,
                               QualType T, TypeSourceInfo *TSInfo,
-                              StorageClass SC, StorageClass SCAsWritten);
+                              StorageClass SC);
   void ActOnParamDefaultArgument(Decl *param,
                                  SourceLocation EqualLoc,
                                  Expr *defarg);
@@ -1383,9 +1442,19 @@ public:
     return D && isa<ObjCMethodDecl>(D);
   }
 
+  /// \brief Determine whether we can skip parsing the body of a function
+  /// definition, assuming we don't care about analyzing its body or emitting
+  /// code for that function.
+  ///
+  /// This will be \c false only if we may need the body of the function in
+  /// order to parse the rest of the program (for instance, if it is
+  /// \c constexpr in C++11 or has an 'auto' return type in C++14).
+  bool canSkipFunctionBody(Decl *D);
+
   void computeNRVO(Stmt *Body, sema::FunctionScopeInfo *Scope);
   Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body);
   Decl *ActOnFinishFunctionBody(Decl *Decl, Stmt *Body, bool IsInstantiation);
+  Decl *ActOnSkippedFunctionBody(Decl *Decl);
 
   /// ActOnFinishDelayedAttribute - Invoked when we have finished parsing an
   /// attribute for which parsing is delayed.
@@ -1409,6 +1478,11 @@ public:
                               SourceLocation AsmLoc,
                               SourceLocation RParenLoc);
 
+  /// \brief Handle a C++11 empty-declaration and attribute-declaration.
+  Decl *ActOnEmptyDeclaration(Scope *S,
+                              AttributeList *AttrList,
+                              SourceLocation SemiLoc);
+
   /// \brief The parser has processed a module import declaration.
   ///
   /// \param AtLoc The location of the '@' symbol, if any.
@@ -1419,6 +1493,14 @@ public:
   DeclResult ActOnModuleImport(SourceLocation AtLoc, SourceLocation ImportLoc,
                                ModuleIdPath Path);
 
+  /// \brief Create an implicit import of the given module at the given
+  /// source location.
+  ///
+  /// This routine is typically used for error recovery, when the entity found
+  /// by name lookup is actually hidden within a module that we know about but
+  /// the user has forgotten to import.
+  void createImplicitModuleImport(SourceLocation Loc, Module *Mod);
+
   /// \brief Retrieve a suitable printing policy.
   PrintingPolicy getPrintingPolicy() const {
     return getPrintingPolicy(Context, PP);
@@ -1436,7 +1518,8 @@ public:
                                    DeclSpec &DS);
   Decl *ParsedFreeStandingDeclSpec(Scope *S, AccessSpecifier AS,
                                    DeclSpec &DS,
-                                   MultiTemplateParamsArg TemplateParams);
+                                   MultiTemplateParamsArg TemplateParams,
+                                   bool IsExplicitInstantiation = false);
 
   Decl *BuildAnonymousStructOrUnion(Scope *S, DeclSpec &DS,
                                     AccessSpecifier AS,
@@ -1502,17 +1585,10 @@ public:
                             AccessSpecifier AS, NamedDecl *PrevDecl,
                             Declarator *D = 0);
 
-  enum CXXSpecialMember {
-    CXXDefaultConstructor,
-    CXXCopyConstructor,
-    CXXMoveConstructor,
-    CXXCopyAssignment,
-    CXXMoveAssignment,
-    CXXDestructor,
-    CXXInvalid
-  };
   bool CheckNontrivialField(FieldDecl *FD);
-  void DiagnoseNontrivial(const RecordType* Record, CXXSpecialMember mem);
+  void DiagnoseNontrivial(const CXXRecordDecl *Record, CXXSpecialMember CSM);
+  bool SpecialMemberIsTrivial(CXXMethodDecl *MD, CXXSpecialMember CSM,
+                              bool Diagnose = false);
   CXXSpecialMember getSpecialMember(const CXXMethodDecl *MD);
   void ActOnLastBitfield(SourceLocation DeclStart,
                          SmallVectorImpl<Decl *> &AllIvarDecls);
@@ -1522,7 +1598,7 @@ public:
 
   // This is used for both record definitions and ObjC interface declarations.
   void ActOnFields(Scope* S, SourceLocation RecLoc, Decl *TagDecl,
-                   llvm::ArrayRef<Decl *> Fields,
+                   ArrayRef<Decl *> Fields,
                    SourceLocation LBrac, SourceLocation RBrac,
                    AttributeList *AttrList);
 
@@ -1639,30 +1715,54 @@ public:
   bool isIncompatibleTypedef(TypeDecl *Old, TypedefNameDecl *New);
 
   /// Attribute merging methods. Return true if a new attribute was added.
-  AvailabilityAttr *mergeAvailabilityAttr(Decl *D, SourceRange Range,
+  AvailabilityAttr *mergeAvailabilityAttr(NamedDecl *D, SourceRange Range,
                                           IdentifierInfo *Platform,
                                           VersionTuple Introduced,
                                           VersionTuple Deprecated,
                                           VersionTuple Obsoleted,
                                           bool IsUnavailable,
-                                          StringRef Message);
+                                          StringRef Message,
+                                          bool Override,
+                                          unsigned AttrSpellingListIndex);
+  TypeVisibilityAttr *mergeTypeVisibilityAttr(Decl *D, SourceRange Range,
+                                       TypeVisibilityAttr::VisibilityType Vis,
+                                              unsigned AttrSpellingListIndex);
   VisibilityAttr *mergeVisibilityAttr(Decl *D, SourceRange Range,
-                                      VisibilityAttr::VisibilityType Vis);
-  DLLImportAttr *mergeDLLImportAttr(Decl *D, SourceRange Range);
-  DLLExportAttr *mergeDLLExportAttr(Decl *D, SourceRange Range);
+                                      VisibilityAttr::VisibilityType Vis,
+                                      unsigned AttrSpellingListIndex);
+  DLLImportAttr *mergeDLLImportAttr(Decl *D, SourceRange Range,
+                                    unsigned AttrSpellingListIndex);
+  DLLExportAttr *mergeDLLExportAttr(Decl *D, SourceRange Range,
+                                    unsigned AttrSpellingListIndex);
   FormatAttr *mergeFormatAttr(Decl *D, SourceRange Range, StringRef Format,
-                              int FormatIdx, int FirstArg);
-  SectionAttr *mergeSectionAttr(Decl *D, SourceRange Range, StringRef Name);
-  bool mergeDeclAttribute(Decl *New, InheritableAttr *Attr);
+                              int FormatIdx, int FirstArg,
+                              unsigned AttrSpellingListIndex);
+  SectionAttr *mergeSectionAttr(Decl *D, SourceRange Range, StringRef Name,
+                                unsigned AttrSpellingListIndex);
+
+  /// \brief Describes the kind of merge to perform for availability
+  /// attributes (including "deprecated", "unavailable", and "availability").
+  enum AvailabilityMergeKind {
+    /// \brief Don't merge availability attributes at all.
+    AMK_None,
+    /// \brief Merge availability attributes for a redeclaration, which requires
+    /// an exact match.
+    AMK_Redeclaration,
+    /// \brief Merge availability attributes for an override, which requires
+    /// an exact match or a weakening of constraints.
+    AMK_Override
+  };
 
-  void mergeDeclAttributes(Decl *New, Decl *Old, bool MergeDeprecation = true);
+  void mergeDeclAttributes(NamedDecl *New, Decl *Old,
+                           AvailabilityMergeKind AMK = AMK_Redeclaration);
   void MergeTypedefNameDecl(TypedefNameDecl *New, LookupResult &OldDecls);
   bool MergeFunctionDecl(FunctionDecl *New, Decl *Old, Scope *S);
   bool MergeCompatibleFunctionDecls(FunctionDecl *New, FunctionDecl *Old,
                                     Scope *S);
   void mergeObjCMethodDecls(ObjCMethodDecl *New, ObjCMethodDecl *Old);
-  void MergeVarDecl(VarDecl *New, LookupResult &OldDecls);
-  void MergeVarDeclTypes(VarDecl *New, VarDecl *Old);
+  void MergeVarDecl(VarDecl *New, LookupResult &OldDecls,
+                    bool OldDeclsWereHidden);
+  void MergeVarDeclTypes(VarDecl *New, VarDecl *Old, bool OldIsHidden);
   void MergeVarDeclExceptionSpecs(VarDecl *New, VarDecl *Old);
   bool MergeCXXFunctionDecl(FunctionDecl *New, FunctionDecl *Old, Scope *S);
 
@@ -1841,6 +1941,19 @@ public:
   };
   ObjCSubscriptKind CheckSubscriptingKind(Expr *FromE);
 
+  // Note that LK_String is intentionally after the other literals, as
+  // this is used for diagnostics logic.
+  enum ObjCLiteralKind {
+    LK_Array,
+    LK_Dictionary,
+    LK_Numeric,
+    LK_Boxed,
+    LK_String,
+    LK_Block,
+    LK_None
+  };
+  ObjCLiteralKind CheckLiteralKind(Expr *FromE);
+
   ExprResult PerformObjectMemberConversion(Expr *From,
                                            NestedNameSpecifier *Qualifier,
                                            NamedDecl *FoundDecl,
@@ -1853,13 +1966,13 @@ public:
 
   void AddOverloadCandidate(FunctionDecl *Function,
                             DeclAccessPair FoundDecl,
-                            llvm::ArrayRef<Expr *> Args,
+                            ArrayRef<Expr *> Args,
                             OverloadCandidateSet& CandidateSet,
                             bool SuppressUserConversions = false,
                             bool PartialOverloading = false,
                             bool AllowExplicit = false);
   void AddFunctionCandidates(const UnresolvedSetImpl &Functions,
-                             llvm::ArrayRef<Expr *> Args,
+                             ArrayRef<Expr *> Args,
                              OverloadCandidateSet& CandidateSet,
                              bool SuppressUserConversions = false,
                             TemplateArgumentListInfo *ExplicitTemplateArgs = 0);
@@ -1873,7 +1986,7 @@ public:
                           DeclAccessPair FoundDecl,
                           CXXRecordDecl *ActingContext, QualType ObjectType,
                           Expr::Classification ObjectClassification,
-                          llvm::ArrayRef<Expr *> Args,
+                          ArrayRef<Expr *> Args,
                           OverloadCandidateSet& CandidateSet,
                           bool SuppressUserConversions = false);
   void AddMethodTemplateCandidate(FunctionTemplateDecl *MethodTmpl,
@@ -1882,13 +1995,13 @@ public:
                                  TemplateArgumentListInfo *ExplicitTemplateArgs,
                                   QualType ObjectType,
                                   Expr::Classification ObjectClassification,
-                                  llvm::ArrayRef<Expr *> Args,
+                                  ArrayRef<Expr *> Args,
                                   OverloadCandidateSet& CandidateSet,
                                   bool SuppressUserConversions = false);
   void AddTemplateOverloadCandidate(FunctionTemplateDecl *FunctionTemplate,
                                     DeclAccessPair FoundDecl,
                                  TemplateArgumentListInfo *ExplicitTemplateArgs,
-                                    llvm::ArrayRef<Expr *> Args,
+                                    ArrayRef<Expr *> Args,
                                     OverloadCandidateSet& CandidateSet,
                                     bool SuppressUserConversions = false);
   void AddConversionCandidate(CXXConversionDecl *Conversion,
@@ -1905,7 +2018,7 @@ public:
                              DeclAccessPair FoundDecl,
                              CXXRecordDecl *ActingContext,
                              const FunctionProtoType *Proto,
-                             Expr *Object, llvm::ArrayRef<Expr*> Args,
+                             Expr *Object, ArrayRef<Expr *> Args,
                              OverloadCandidateSet& CandidateSet);
   void AddMemberOperatorCandidates(OverloadedOperatorKind Op,
                                    SourceLocation OpLoc,
@@ -1923,7 +2036,7 @@ public:
                                     OverloadCandidateSet& CandidateSet);
   void AddArgumentDependentLookupCandidates(DeclarationName Name,
                                             bool Operator, SourceLocation Loc,
-                                            llvm::ArrayRef<Expr *> Args,
+                                            ArrayRef<Expr *> Args,
                                 TemplateArgumentListInfo *ExplicitTemplateArgs,
                                             OverloadCandidateSet& CandidateSet,
                                             bool PartialOverloading = false);
@@ -1971,7 +2084,7 @@ public:
                                             FunctionDecl *Fn);
 
   void AddOverloadedCallCandidates(UnresolvedLookupExpr *ULE,
-                                   llvm::ArrayRef<Expr *> Args,
+                                   ArrayRef<Expr *> Args,
                                    OverloadCandidateSet &CandidateSet,
                                    bool PartialOverloading = false);
 
@@ -2164,7 +2277,7 @@ private:
   //
   // The boolean value will be true to indicate that the namespace was loaded
   // from an AST/PCH file, or false otherwise.
-  llvm::DenseMap<NamespaceDecl*, bool> KnownNamespaces;
+  llvm::MapVector<NamespaceDecl*, bool> KnownNamespaces;
 
   /// \brief Whether we have already loaded known namespaces from an extenal
   /// source.
@@ -2218,7 +2331,7 @@ public:
 
   void ArgumentDependentLookup(DeclarationName Name, bool Operator,
                                SourceLocation Loc,
-                               llvm::ArrayRef<Expr *> Args,
+                               ArrayRef<Expr *> Args,
                                ADLResult &Functions);
 
   void LookupVisibleDecls(Scope *S, LookupNameKind Kind,
@@ -2237,7 +2350,7 @@ public:
                              const ObjCObjectPointerType *OPT = 0);
 
   void FindAssociatedClassesAndNamespaces(SourceLocation InstantiationLoc,
-                                          llvm::ArrayRef<Expr *> Args,
+                                          ArrayRef<Expr *> Args,
                                    AssociatedNamespaceSet &AssociatedNamespaces,
                                    AssociatedClassSet &AssociatedClasses);
 
@@ -2260,19 +2373,25 @@ public:
 
   // More parsing and symbol table subroutines.
 
+  void ProcessPragmaWeak(Scope *S, Decl *D);
   // Decl attributes - this routine is the top level dispatcher.
   void ProcessDeclAttributes(Scope *S, Decl *D, const Declarator &PD,
-                           bool NonInheritable = true, bool Inheritable = true);
+                             bool NonInheritable = true,
+                             bool Inheritable = true);
   void ProcessDeclAttributeList(Scope *S, Decl *D, const AttributeList *AL,
-                           bool NonInheritable = true, bool Inheritable = true);
+                                bool NonInheritable = true,
+                                bool Inheritable = true,
+                                bool IncludeCXX11Attributes = true);
   bool ProcessAccessDeclAttributeList(AccessSpecDecl *ASDecl,
                                       const AttributeList *AttrList);
 
   void checkUnusedDeclAttributes(Declarator &D);
 
   bool CheckRegparmAttr(const AttributeList &attr, unsigned &value);
-  bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC);
+  bool CheckCallingConvAttr(const AttributeList &attr, CallingConv &CC, 
+                            const FunctionDecl *FD = 0);
   bool CheckNoReturnAttr(const AttributeList &attr);
+  void CheckAlignasUnderalignment(Decl *D);
 
   /// \brief Stmt attributes - this routine is the top level dispatcher.
   StmtResult ProcessStmtAttributes(Stmt *Stmt, AttributeList *Attrs,
@@ -2339,21 +2458,27 @@ public:
             llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& PropMap,
             llvm::DenseMap<IdentifierInfo *, ObjCPropertyDecl*>& SuperPropMap);
   
+  /// IvarBacksCurrentMethodAccessor - This routine returns 'true' if 'IV' is
+  /// an ivar synthesized for 'Method' and 'Method' is a property accessor
+  /// declared in class 'IFace'.
+  bool IvarBacksCurrentMethodAccessor(ObjCInterfaceDecl *IFace,
+                                      ObjCMethodDecl *Method, ObjCIvarDecl *IV);
+  
   /// Called by ActOnProperty to handle \@property declarations in
   /// class extensions.
-  Decl *HandlePropertyInClassExtension(Scope *S,
-                                       SourceLocation AtLoc,
-                                       SourceLocation LParenLoc,
-                                       FieldDeclarator &FD,
-                                       Selector GetterSel,
-                                       Selector SetterSel,
-                                       const bool isAssign,
-                                       const bool isReadWrite,
-                                       const unsigned Attributes,
-                                       const unsigned AttributesAsWritten,
-                                       bool *isOverridingProperty,
-                                       TypeSourceInfo *T,
-                                       tok::ObjCKeywordKind MethodImplKind);
+  ObjCPropertyDecl *HandlePropertyInClassExtension(Scope *S,
+                      SourceLocation AtLoc,
+                      SourceLocation LParenLoc,
+                      FieldDeclarator &FD,
+                      Selector GetterSel,
+                      Selector SetterSel,
+                      const bool isAssign,
+                      const bool isReadWrite,
+                      const unsigned Attributes,
+                      const unsigned AttributesAsWritten,
+                      bool *isOverridingProperty,
+                      TypeSourceInfo *T,
+                      tok::ObjCKeywordKind MethodImplKind);
 
   /// Called by ActOnProperty and HandlePropertyInClassExtension to
   /// handle creating the ObjcPropertyDecl for a category or \@interface.
@@ -2507,8 +2632,15 @@ public:
   FullExprArg MakeFullExpr(Expr *Arg, SourceLocation CC) {
     return FullExprArg(ActOnFinishFullExpr(Arg, CC).release());
   }
+  FullExprArg MakeFullDiscardedValueExpr(Expr *Arg) {
+    ExprResult FE =
+      ActOnFinishFullExpr(Arg, Arg ? Arg->getExprLoc() : SourceLocation(),
+                          /*DiscardedValue*/ true);
+    return FullExprArg(FE.release());
+  }
 
-  StmtResult ActOnExprStmt(FullExprArg Expr);
+  StmtResult ActOnExprStmt(ExprResult Arg);
+  StmtResult ActOnExprStmtError();
 
   StmtResult ActOnNullStmt(SourceLocation SemiLoc,
                            bool HasLeadingEmptyMacro = false);
@@ -2616,7 +2748,7 @@ public:
                                    SourceLocation StarLoc,
                                    Expr *DestExp);
   StmtResult ActOnContinueStmt(SourceLocation ContinueLoc, Scope *CurScope);
-  StmtResult ActOnBreakStmt(SourceLocation GotoLoc, Scope *CurScope);
+  StmtResult ActOnBreakStmt(SourceLocation BreakLoc, Scope *CurScope);
 
   const VarDecl *getCopyElisionCandidate(QualType ReturnType, Expr *E,
                                          bool AllowFunctionParameters);
@@ -2632,7 +2764,8 @@ public:
                              SourceLocation RParenLoc);
 
   NamedDecl *LookupInlineAsmIdentifier(StringRef Name, SourceLocation Loc,
-                                       unsigned &Size);
+                                       unsigned &Length, unsigned &Size, 
+                                       unsigned &Type, bool &IsVarDecl);
   bool LookupInlineAsmField(StringRef Base, StringRef Member,
                             unsigned &Offset, SourceLocation AsmLoc);
   StmtResult ActOnMSAsmStmt(SourceLocation AsmLoc, SourceLocation LBraceLoc,
@@ -2766,7 +2899,7 @@ public:
 
   void DiscardCleanupsInEvaluationContext();
 
-  ExprResult TranformToPotentiallyEvaluated(Expr *E);
+  ExprResult TransformToPotentiallyEvaluated(Expr *E);
   ExprResult HandleExprEvaluationContextForTypeof(Expr *E);
 
   ExprResult ActOnConstantExpression(ExprResult Res);
@@ -2777,7 +2910,7 @@ public:
   // for expressions referring to a decl; these exist because odr-use marking
   // needs to be delayed for some constant variables when we build one of the
   // named expressions.
-  void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D);
+  void MarkAnyDeclReferenced(SourceLocation Loc, Decl *D, bool OdrUse);
   void MarkFunctionReferenced(SourceLocation Loc, FunctionDecl *Func);
   void MarkVariableReferenced(SourceLocation Loc, VarDecl *Var);
   void MarkDeclRefReferenced(DeclRefExpr *E);
@@ -2873,7 +3006,7 @@ public:
   bool DiagnoseEmptyLookup(Scope *S, CXXScopeSpec &SS, LookupResult &R,
                            CorrectionCandidateCallback &CCC,
                            TemplateArgumentListInfo *ExplicitTemplateArgs = 0,
-                       llvm::ArrayRef<Expr *> Args = llvm::ArrayRef<Expr *>());
+                           ArrayRef<Expr *> Args = ArrayRef<Expr *>());
 
   ExprResult LookupInObjCMethod(LookupResult &LookUp, Scope *S,
                                 IdentifierInfo *II,
@@ -2892,7 +3025,8 @@ public:
   ExprResult BuildDeclRefExpr(ValueDecl *D, QualType Ty,
                               ExprValueKind VK,
                               const DeclarationNameInfo &NameInfo,
-                              const CXXScopeSpec *SS = 0);
+                              const CXXScopeSpec *SS = 0,
+                              NamedDecl *FoundD = 0);
   ExprResult
   BuildAnonymousStructUnionMemberReference(const CXXScopeSpec &SS,
                                            SourceLocation nameLoc,
@@ -2925,7 +3059,7 @@ public:
                                       bool NeedsADL);
   ExprResult BuildDeclarationNameExpr(const CXXScopeSpec &SS,
                                       const DeclarationNameInfo &NameInfo,
-                                      NamedDecl *D);
+                                      NamedDecl *D, NamedDecl *FoundD = 0);
 
   ExprResult BuildLiteralOperatorCall(LookupResult &R,
                                       DeclarationNameInfo &SuffixInfo,
@@ -3334,15 +3468,9 @@ public:
                               MultiTemplateParamsArg TemplateParams,
                               SourceLocation UsingLoc,
                               UnqualifiedId &Name,
+                              AttributeList *AttrList,
                               TypeResult Type);
 
-  /// InitializeVarWithConstructor - Creates an CXXConstructExpr
-  /// and sets it as the initializer for the passed in VarDecl.
-  bool InitializeVarWithConstructor(VarDecl *VD,
-                                    CXXConstructorDecl *Constructor,
-                                    MultiExprArg Exprs,
-                                    bool HadMultipleCandidates);
-
   /// BuildCXXConstructExpr - Creates a complete call to a constructor,
   /// including handling of its default argument expressions.
   ///
@@ -3350,8 +3478,9 @@ public:
   ExprResult
   BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
                         CXXConstructorDecl *Constructor, MultiExprArg Exprs,
-                        bool HadMultipleCandidates, bool RequiresZeroInit,
-                        unsigned ConstructKind, SourceRange ParenRange);
+                        bool HadMultipleCandidates, bool IsListInitialization,
+                        bool RequiresZeroInit, unsigned ConstructKind,
+                        SourceRange ParenRange);
 
   // FIXME: Can re remove this and have the above BuildCXXConstructExpr check if
   // the constructor can be elidable?
@@ -3359,8 +3488,8 @@ public:
   BuildCXXConstructExpr(SourceLocation ConstructLoc, QualType DeclInitType,
                         CXXConstructorDecl *Constructor, bool Elidable,
                         MultiExprArg Exprs, bool HadMultipleCandidates,
-                        bool RequiresZeroInit, unsigned ConstructKind,
-                        SourceRange ParenRange);
+                        bool IsListInitialization, bool RequiresZeroInit,
+                        unsigned ConstructKind, SourceRange ParenRange);
 
   /// BuildCXXDefaultArgExpr - Creates a CXXDefaultArgExpr, instantiating
   /// the default expr if needed.
@@ -3395,7 +3524,7 @@ public:
   public:
     explicit ImplicitExceptionSpecification(Sema &Self)
       : Self(&Self), ComputedEST(EST_BasicNoexcept) {
-      if (!Self.getLangOpts().CPlusPlus0x)
+      if (!Self.getLangOpts().CPlusPlus11)
         ComputedEST = EST_DynamicNone;
     }
 
@@ -3474,6 +3603,11 @@ public:
   ImplicitExceptionSpecification
   ComputeDefaultedDtorExceptionSpec(CXXMethodDecl *MD);
 
+  /// \brief Determine what sort of exception specification an inheriting
+  /// constructor of a class will have.
+  ImplicitExceptionSpecification
+  ComputeInheritingCtorExceptionSpec(CXXMethodDecl *MD);
+
   /// \brief Evaluate the implicit exception specification for a defaulted
   /// special member function.
   void EvaluateImplicitExceptionSpec(SourceLocation Loc, CXXMethodDecl *MD);
@@ -3484,7 +3618,7 @@ public:
                                    ArrayRef<ParsedType> DynamicExceptions,
                                    ArrayRef<SourceRange> DynamicExceptionRanges,
                                    Expr *NoexceptExpr,
-                                   llvm::SmallVectorImpl<QualType> &Exceptions,
+                                   SmallVectorImpl<QualType> &Exceptions,
                                    FunctionProtoType::ExtProtoInfo &EPI);
 
   /// \brief Determine if a special member function should have a deleted
@@ -3526,11 +3660,15 @@ public:
   void AdjustDestructorExceptionSpec(CXXRecordDecl *ClassDecl,
                                      CXXDestructorDecl *Destructor);
 
-  /// \brief Declare all inherited constructors for the given class.
+  /// \brief Declare all inheriting constructors for the given class.
   ///
-  /// \param ClassDecl The class declaration into which the inherited
+  /// \param ClassDecl The class declaration into which the inheriting
   /// constructors will be added.
-  void DeclareInheritedConstructors(CXXRecordDecl *ClassDecl);
+  void DeclareInheritingConstructors(CXXRecordDecl *ClassDecl);
+
+  /// \brief Define the specified inheriting constructor.
+  void DefineInheritingConstructor(SourceLocation UseLoc,
+                                   CXXConstructorDecl *Constructor);
 
   /// \brief Declare the implicit copy constructor for the given class.
   ///
@@ -3617,7 +3755,12 @@ public:
                                MultiExprArg ArgsPtr,
                                SourceLocation Loc,
                                SmallVectorImpl<Expr*> &ConvertedArgs,
-                               bool AllowExplicit = false);
+                               bool AllowExplicit = false,
+                               bool IsListInitialization = false);
+
+  ParsedType getInheritingConstructorName(CXXScopeSpec &SS,
+                                          SourceLocation NameLoc,
+                                          IdentifierInfo &Name);
 
   ParsedType getDestructorName(SourceLocation TildeLoc,
                                IdentifierInfo &II, SourceLocation NameLoc,
@@ -3917,7 +4060,9 @@ public:
     return ActOnFinishFullExpr(Expr, Expr ? Expr->getExprLoc()
                                           : SourceLocation());
   }
-  ExprResult ActOnFinishFullExpr(Expr *Expr, SourceLocation CC);
+  ExprResult ActOnFinishFullExpr(Expr *Expr, SourceLocation CC,
+                                 bool DiscardedValue = false,
+                                 bool IsConstexpr = false);
   StmtResult ActOnFinishFullStmt(Stmt *Stmt);
 
   // Marks SS invalid if it represents an incomplete type.
@@ -3943,7 +4088,7 @@ public:
   bool ActOnCXXGlobalScopeSpecifier(Scope *S, SourceLocation CCLoc,
                                     CXXScopeSpec &SS);
 
-  bool isAcceptableNestedNameSpecifier(NamedDecl *SD);
+  bool isAcceptableNestedNameSpecifier(const NamedDecl *SD);
   NamedDecl *FindFirstQualifierInScope(Scope *S, NestedNameSpecifier *NNS);
 
   bool isNonTypeNestedNameSpecifier(Scope *S, CXXScopeSpec &SS,
@@ -4100,7 +4245,7 @@ public:
                                        SourceRange IntroducerRange,
                                        TypeSourceInfo *MethodType,
                                        SourceLocation EndLoc,
-                                       llvm::ArrayRef<ParmVarDecl *> Params);
+                                       ArrayRef<ParmVarDecl *> Params);
 
   /// \brief Introduce the scope for a lambda expression.
   sema::LambdaScopeInfo *enterLambdaScope(CXXMethodDecl *CallOperator,
@@ -4247,7 +4392,7 @@ public:
                             SourceLocation ColonLoc,
                             AttributeList *Attrs = 0);
 
-  Decl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS,
+  NamedDecl *ActOnCXXMemberDeclarator(Scope *S, AccessSpecifier AS,
                                  Declarator &D,
                                  MultiTemplateParamsArg TemplateParameterLists,
                                  Expr *BitfieldWidth, const VirtSpecifiers &VS,
@@ -4304,9 +4449,9 @@ public:
   bool SetDelegatingInitializer(CXXConstructorDecl *Constructor,
                                 CXXCtorInitializer *Initializer);
 
-  bool SetCtorInitializers(CXXConstructorDecl *Constructor,
-                           CXXCtorInitializer **Initializers,
-                           unsigned NumInitializers, bool AnyErrors);
+  bool SetCtorInitializers(CXXConstructorDecl *Constructor, bool AnyErrors,
+                           ArrayRef<CXXCtorInitializer *> Initializers =
+                               ArrayRef<CXXCtorInitializer *>());
 
   void SetIvarInitializers(ObjCImplementationDecl *ObjCImplementation);
 
@@ -4369,8 +4514,7 @@ public:
 
   void ActOnMemInitializers(Decl *ConstructorDecl,
                             SourceLocation ColonLoc,
-                            CXXCtorInitializer **MemInits,
-                            unsigned NumMemInits,
+                            ArrayRef<CXXCtorInitializer*> MemInits,
                             bool AnyErrors);
 
   void CheckCompletedCXXClass(CXXRecordDecl *Record);
@@ -4407,8 +4551,8 @@ public:
                                   TypeSourceInfo *TSInfo);
   Decl *ActOnFriendTypeDecl(Scope *S, const DeclSpec &DS,
                             MultiTemplateParamsArg TemplateParams);
-  Decl *ActOnFriendFunctionDecl(Scope *S, Declarator &D,
-                                MultiTemplateParamsArg TemplateParams);
+  NamedDecl *ActOnFriendFunctionDecl(Scope *S, Declarator &D,
+                                     MultiTemplateParamsArg TemplateParams);
 
   QualType CheckConstructorDeclarator(Declarator &D, QualType R,
                                       StorageClass& SC);
@@ -4420,8 +4564,10 @@ public:
                                  StorageClass& SC);
   Decl *ActOnConversionDeclarator(CXXConversionDecl *Conversion);
 
-  void CheckExplicitlyDefaultedMethods(CXXRecordDecl *Record);
   void CheckExplicitlyDefaultedSpecialMember(CXXMethodDecl *MD);
+  void CheckExplicitlyDefaultedMemberExceptionSpec(CXXMethodDecl *MD,
+                                                   const FunctionProtoType *T);
+  void CheckDelayedExplicitlyDefaultedMemberExceptionSpecs();
 
   //===--------------------------------------------------------------------===//
   // C++ Derived Classes
@@ -4436,6 +4582,7 @@ public:
 
   BaseResult ActOnBaseSpecifier(Decl *classdecl,
                                 SourceRange SpecifierRange,
+                                ParsedAttributes &Attrs,
                                 bool Virtual, AccessSpecifier Access,
                                 ParsedType basetype,
                                 SourceLocation BaseLoc,
@@ -4467,6 +4614,9 @@ public:
 
   std::string getAmbiguousPathsDisplayString(CXXBasePaths &Paths);
 
+  bool CheckOverridingFunctionAttributes(const CXXMethodDecl *New,
+                                         const CXXMethodDecl *Old);
+
   /// CheckOverridingFunctionReturnType - Checks whether the return types are
   /// covariant, according to C++ [class.virtual]p5.
   bool CheckOverridingFunctionReturnType(const CXXMethodDecl *New,
@@ -5234,14 +5384,14 @@ public:
   /// expansion.
   TypeSourceInfo *CheckPackExpansion(TypeSourceInfo *Pattern,
                                      SourceLocation EllipsisLoc,
-                                     llvm::Optional<unsigned> NumExpansions);
+                                     Optional<unsigned> NumExpansions);
 
   /// \brief Construct a pack expansion type from the pattern of the pack
   /// expansion.
   QualType CheckPackExpansion(QualType Pattern,
                               SourceRange PatternRange,
                               SourceLocation EllipsisLoc,
-                              llvm::Optional<unsigned> NumExpansions);
+                              Optional<unsigned> NumExpansions);
 
   /// \brief Invoked when parsing an expression followed by an ellipsis, which
   /// creates a pack expansion.
@@ -5260,7 +5410,7 @@ public:
   ///
   /// \param EllipsisLoc The location of the ellipsis.
   ExprResult CheckPackExpansion(Expr *Pattern, SourceLocation EllipsisLoc,
-                                llvm::Optional<unsigned> NumExpansions);
+                                Optional<unsigned> NumExpansions);
 
   /// \brief Determine whether we could expand a pack expansion with the
   /// given set of parameter packs into separate arguments by repeatedly
@@ -5298,11 +5448,11 @@ public:
   /// must be set.
   bool CheckParameterPacksForExpansion(SourceLocation EllipsisLoc,
                                        SourceRange PatternRange,
-                             llvm::ArrayRef<UnexpandedParameterPack> Unexpanded,
+                             ArrayRef<UnexpandedParameterPack> Unexpanded,
                              const MultiLevelTemplateArgumentList &TemplateArgs,
                                        bool &ShouldExpand,
                                        bool &RetainExpansion,
-                                       llvm::Optional<unsigned> &NumExpansions);
+                                       Optional<unsigned> &NumExpansions);
 
   /// \brief Determine the number of arguments in the given pack expansion
   /// type.
@@ -5311,8 +5461,8 @@ public:
   /// consistent across all of the unexpanded parameter packs in its pattern.
   ///
   /// Returns an empty Optional if the type can't be expanded.
-  llvm::Optional<unsigned> getNumArgumentsInExpansion(QualType T,
-                            const MultiLevelTemplateArgumentList &TemplateArgs);
+  Optional<unsigned> getNumArgumentsInExpansion(QualType T,
+      const MultiLevelTemplateArgumentList &TemplateArgs);
 
   /// \brief Determine whether the given declarator contains any unexpanded
   /// parameter packs.
@@ -5366,10 +5516,8 @@ public:
     /// \brief Substitution of the deduced template argument values
     /// resulted in an error.
     TDK_SubstitutionFailure,
-    /// \brief Substitution of the deduced template argument values
-    /// into a non-deduced context produced a type or value that
-    /// produces a type that does not match the original template
-    /// arguments provided.
+    /// \brief A non-depnedent component of the parameter did not match the
+    /// corresponding component of the argument.
     TDK_NonDeducedMismatch,
     /// \brief When performing template argument deduction for a function
     /// template, there were too many call arguments.
@@ -5382,7 +5530,9 @@ public:
     TDK_InvalidExplicitArguments,
     /// \brief The arguments included an overloaded function name that could
     /// not be resolved to a suitable function.
-    TDK_FailedOverloadResolution
+    TDK_FailedOverloadResolution,
+    /// \brief Deduction failed; that's all we know.
+    TDK_MiscellaneousDeductionFailure
   };
 
   TemplateDeductionResult
@@ -5423,7 +5573,7 @@ public:
   TemplateDeductionResult
   DeduceTemplateArguments(FunctionTemplateDecl *FunctionTemplate,
                           TemplateArgumentListInfo *ExplicitTemplateArgs,
-                          llvm::ArrayRef<Expr *> Args,
+                          ArrayRef<Expr *> Args,
                           FunctionDecl *&Specialization,
                           sema::TemplateDeductionInfo &Info);
 
@@ -5483,13 +5633,14 @@ public:
                                   bool OnlyDeduced,
                                   unsigned Depth,
                                   llvm::SmallBitVector &Used);
-  void MarkDeducedTemplateParameters(FunctionTemplateDecl *FunctionTemplate,
-                                     llvm::SmallBitVector &Deduced) {
+  void MarkDeducedTemplateParameters(
+                                  const FunctionTemplateDecl *FunctionTemplate,
+                                  llvm::SmallBitVector &Deduced) {
     return MarkDeducedTemplateParameters(Context, FunctionTemplate, Deduced);
   }
   static void MarkDeducedTemplateParameters(ASTContext &Ctx,
-                                         FunctionTemplateDecl *FunctionTemplate,
-                                         llvm::SmallBitVector &Deduced);
+                                  const FunctionTemplateDecl *FunctionTemplate,
+                                  llvm::SmallBitVector &Deduced);
 
   //===--------------------------------------------------------------------===//
   // C++ Template Instantiation
@@ -5554,7 +5705,7 @@ public:
     NamedDecl *Template;
 
     /// \brief The entity that is being instantiated.
-    uintptr_t Entity;
+    Decl *Entity;
 
     /// \brief The list of template arguments we are substituting, if they
     /// are not part of the entity.
@@ -5796,11 +5947,11 @@ public:
   /// template argument substitution failures are not considered
   /// errors.
   ///
-  /// \returns An empty \c llvm::Optional if we're not in a SFINAE context.
+  /// \returns An empty \c Optional if we're not in a SFINAE context.
   /// Otherwise, contains a pointer that, if non-NULL, contains the nearest
   /// template-deduction context object, which can be used to capture
   /// diagnostics that will be suppressed.
-  llvm::Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const;
+  Optional<sema::TemplateDeductionInfo *> isSFINAEContext() const;
 
   /// \brief Determines whether we are currently in a context that
   /// is not evaluated as per C++ [expr] p5.
@@ -5911,7 +6062,7 @@ public:
   ParmVarDecl *SubstParmVarDecl(ParmVarDecl *D,
                             const MultiLevelTemplateArgumentList &TemplateArgs,
                                 int indexAdjustment,
-                                llvm::Optional<unsigned> NumExpansions,
+                                Optional<unsigned> NumExpansions,
                                 bool ExpectParameterPack);
   bool SubstParmTypes(SourceLocation Loc,
                       ParmVarDecl **Params, unsigned NumParams,
@@ -6141,10 +6292,6 @@ public:
   void DiagnosePropertyMismatch(ObjCPropertyDecl *Property,
                                 ObjCPropertyDecl *SuperProperty,
                                 const IdentifierInfo *Name);
-  void ComparePropertiesInBaseAndSuper(ObjCInterfaceDecl *IDecl);
-
-
-  void CompareProperties(Decl *CDecl, Decl *MergeProtocols);
 
   void DiagnoseClassExtensionDupMethods(ObjCCategoryDecl *CAT,
                                         ObjCInterfaceDecl *ID);
@@ -6214,6 +6361,7 @@ public:
   ObjCMethodDecl *LookupMethodInObjectType(Selector Sel, QualType Ty,
                                            bool IsInstance);
 
+  bool CheckARCMethodDecl(ObjCMethodDecl *method);
   bool inferObjCARCLifetime(ValueDecl *decl);
 
   ExprResult
@@ -6324,14 +6472,13 @@ public:
                                   ParsedType Type,
                                   SourceLocation RParenLoc,
                                   Expr *SubExpr);
-
+  
   bool checkInitMethod(ObjCMethodDecl *method, QualType receiverTypeIfCall);
 
   /// \brief Check whether the given new method is a valid override of the
   /// given overridden method, and set any properties that should be inherited.
   void CheckObjCMethodOverride(ObjCMethodDecl *NewMethod,
-                               const ObjCMethodDecl *Overridden,
-                               bool IsImplementation);
+                               const ObjCMethodDecl *Overridden);
 
   /// \brief Describes the compatibility of a result type with its method.
   enum ResultTypeCompatibilityKind {
@@ -6450,9 +6597,21 @@ public:
 
   /// AddAlignedAttr - Adds an aligned attribute to a particular declaration.
   void AddAlignedAttr(SourceRange AttrRange, Decl *D, Expr *E,
-                      bool isDeclSpec);
+                      unsigned SpellingListIndex, bool IsPackExpansion);
   void AddAlignedAttr(SourceRange AttrRange, Decl *D, TypeSourceInfo *T,
-                      bool isDeclSpec);
+                      unsigned SpellingListIndex, bool IsPackExpansion);
+
+  // OpenMP directives and clauses.
+
+  /// \brief Called on well-formed '#pragma omp threadprivate'.
+  DeclGroupPtrTy ActOnOpenMPThreadprivateDirective(
+                        SourceLocation Loc,
+                        Scope *CurScope,
+                        ArrayRef<DeclarationNameInfo> IdList);
+  /// \brief Build a new OpenMPThreadPrivateDecl and check its correctness.
+  OMPThreadPrivateDecl *CheckOMPThreadPrivateDecl(
+                        SourceLocation Loc,
+                        ArrayRef<DeclRefExpr *> VarList);
 
   /// \brief The kind of conversion being performed.
   enum CheckedConversionKind {
@@ -6541,7 +6700,8 @@ public:
                               Expr **Args, unsigned NumArgs,
                               SmallVector<Expr *, 8> &AllArgs,
                               VariadicCallType CallType = VariadicDoesNotApply,
-                              bool AllowExplicit = false);
+                              bool AllowExplicit = false,
+                              bool IsListInitialization = false);
 
   // DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but
   // will create a runtime trap if the resulting type is not a POD type.
@@ -6812,6 +6972,11 @@ public:
   /// given type.
   ExprResult forceUnknownAnyToType(Expr *E, QualType ToType);
 
+  /// \brief Type-check an expression that's being passed to an
+  /// __unknown_anytype parameter.
+  ExprResult checkUnknownAnyArg(SourceLocation callLoc,
+                                Expr *result, QualType &paramType);
+
   // CheckVectorCast - check type constraints for vectors.
   // Since vectors are an extension, there are no C standard reference for this.
   // We allow casting between vectors and integer datatypes of the same size.
@@ -6883,6 +7048,11 @@ public:
   /// with a related result type, emit a note describing what happened.
   void EmitRelatedResultTypeNote(const Expr *E);
 
+  /// \brief Given that we had incompatible pointer types in a return
+  /// statement, check whether we're in a method with a related result
+  /// type, and if so, emit a note describing what happened.
+  void EmitRelatedResultTypeNoteForReturn(QualType destType);
+
   /// CheckBooleanCondition - Diagnose problems involving the use of
   /// the given expression as a boolean condition (e.g. in an if
   /// statement).  Also performs the standard function and array
@@ -7033,7 +7203,7 @@ public:
   void CodeCompleteTag(Scope *S, unsigned TagSpec);
   void CodeCompleteTypeQualifiers(DeclSpec &DS);
   void CodeCompleteCase(Scope *S);
-  void CodeCompleteCall(Scope *S, Expr *Fn, llvm::ArrayRef<Expr *> Args);
+  void CodeCompleteCall(Scope *S, Expr *Fn, ArrayRef<Expr *> Args);
   void CodeCompleteInitializer(Scope *S, Decl *D);
   void CodeCompleteReturn(Scope *S);
   void CodeCompleteAfterIf(Scope *S);
@@ -7150,12 +7320,11 @@ private:
   bool CheckBlockCall(NamedDecl *NDecl, CallExpr *TheCall,
                       const FunctionProtoType *Proto);
   void CheckConstructorCall(FunctionDecl *FDecl,
-                            Expr **Args,
-                            unsigned NumArgs,
+                            ArrayRef<const Expr *> Args,
                             const FunctionProtoType *Proto,
                             SourceLocation Loc);
 
-  void checkCall(NamedDecl *FDecl, Expr **Args, unsigned NumArgs,
+  void checkCall(NamedDecl *FDecl, ArrayRef<const Expr *> Args,
                  unsigned NumProtoArgs, bool IsMemberFunction,
                  SourceLocation Loc, SourceRange Range,
                  VariadicCallType CallType);
@@ -7203,7 +7372,7 @@ private:
   };
 
   StringLiteralCheckType checkFormatStringExpr(const Expr *E,
-                                               Expr **Args, unsigned NumArgs,
+                                               ArrayRef<const Expr *> Args,
                                                bool HasVAListArg,
                                                unsigned format_idx,
                                                unsigned firstDataArg,
@@ -7212,16 +7381,17 @@ private:
                                                bool inFunctionCall = true);
 
   void CheckFormatString(const StringLiteral *FExpr, const Expr *OrigFormatExpr,
-                         Expr **Args, unsigned NumArgs, bool HasVAListArg,
+                         ArrayRef<const Expr *> Args, bool HasVAListArg,
                          unsigned format_idx, unsigned firstDataArg,
                          FormatStringType Type, bool inFunctionCall,
                          VariadicCallType CallType);
 
-  bool CheckFormatArguments(const FormatAttr *Format, Expr **Args,
-                            unsigned NumArgs, bool IsCXXMember,
+  bool CheckFormatArguments(const FormatAttr *Format,
+                            ArrayRef<const Expr *> Args,
+                            bool IsCXXMember,
                             VariadicCallType CallType,
                             SourceLocation Loc, SourceRange Range);
-  bool CheckFormatArguments(Expr **Args, unsigned NumArgs,
+  bool CheckFormatArguments(ArrayRef<const Expr *> Args,
                             bool HasVAListArg, unsigned format_idx,
                             unsigned firstDataArg, FormatStringType Type,
                             VariadicCallType CallType,
@@ -7245,6 +7415,13 @@ private:
                             SourceLocation ReturnLoc);
   void CheckFloatComparison(SourceLocation Loc, Expr* LHS, Expr* RHS);
   void CheckImplicitConversions(Expr *E, SourceLocation CC = SourceLocation());
+  void CheckForIntOverflow(Expr *E);
+  void CheckUnsequencedOperations(Expr *E);
+
+  /// \brief Perform semantic checks on a completed expression. This will either
+  /// be a full-expression or a default argument expression.
+  void CheckCompletedExpr(Expr *E, SourceLocation CheckLoc = SourceLocation(),
+                          bool IsConstexpr = false);
 
   void CheckBitFieldInitialization(SourceLocation InitLoc, FieldDecl *Field,
                                    Expr *Init);
@@ -7290,6 +7467,8 @@ private:
   /// The parser maintains this state here.
   Scope *CurScope;
 
+  mutable IdentifierInfo *Ident_super;
+
 protected:
   friend class Parser;
   friend class InitializationSequence;
@@ -7307,6 +7486,8 @@ public:
   /// template substitution or instantiation.
   Scope *getCurScope() const { return CurScope; }
 
+  IdentifierInfo *getSuperIdentifier() const;
+
   Decl *getObjCDeclContext() const;
 
   DeclContext *getCurLexicalContext() const {
diff --git a/include/clang/Sema/SemaInternal.h b/include/clang/Sema/SemaInternal.h
index 64b83e3..bbf4272 100644
--- a/include/clang/Sema/SemaInternal.h
+++ b/include/clang/Sema/SemaInternal.h
@@ -15,9 +15,9 @@
 #ifndef LLVM_CLANG_SEMA_SEMA_INTERNAL_H
 #define LLVM_CLANG_SEMA_SEMA_INTERNAL_H
 
+#include "clang/AST/ASTContext.h"
 #include "clang/Sema/Sema.h"
 #include "clang/Sema/SemaDiagnostic.h"
-#include "clang/AST/ASTContext.h"
 
 namespace clang {
 
diff --git a/include/clang/Sema/Template.h b/include/clang/Sema/Template.h
index bbccd25..492e580 100644
--- a/include/clang/Sema/Template.h
+++ b/include/clang/Sema/Template.h
@@ -14,6 +14,7 @@
 
 #include "clang/AST/DeclTemplate.h"
 #include "clang/AST/DeclVisitor.h"
+#include "clang/Sema/Sema.h"
 #include "llvm/ADT/SmallVector.h"
 #include <cassert>
 #include <utility>
@@ -344,7 +345,16 @@ namespace clang {
     void SetPartiallySubstitutedPack(NamedDecl *Pack, 
                                      const TemplateArgument *ExplicitArgs,
                                      unsigned NumExplicitArgs);
-    
+
+    /// \brief Reset the partially-substituted pack when it is no longer of
+    /// interest.
+    void ResetPartiallySubstitutedPack() {
+      assert(PartiallySubstitutedPack && "No partially-substituted pack");
+      PartiallySubstitutedPack = 0;
+      ArgsInPartiallySubstitutedPack = 0;
+      NumArgsInPartiallySubstitutedPack = 0;
+    }
+
     /// \brief Retrieve the partially-substitued template parameter pack.
     ///
     /// If there is no partially-substituted parameter pack, returns NULL.
@@ -420,6 +430,7 @@ namespace clang {
     Decl *VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D);
     Decl *VisitClassScopeFunctionSpecializationDecl(
                                       ClassScopeFunctionSpecializationDecl *D);
+    Decl *VisitOMPThreadPrivateDecl(OMPThreadPrivateDecl *D);
 
     // Base case. FIXME: Remove once we can instantiate everything.
     Decl *VisitDecl(Decl *D) {
diff --git a/include/clang/Sema/TemplateDeduction.h b/include/clang/Sema/TemplateDeduction.h
index 251a659..3abb8f1 100644
--- a/include/clang/Sema/TemplateDeduction.h
+++ b/include/clang/Sema/TemplateDeduction.h
@@ -13,8 +13,8 @@
 #ifndef LLVM_CLANG_SEMA_TEMPLATE_DEDUCTION_H
 #define LLVM_CLANG_SEMA_TEMPLATE_DEDUCTION_H
 
-#include "clang/Basic/PartialDiagnostic.h"
 #include "clang/AST/DeclTemplate.h"
+#include "clang/Basic/PartialDiagnostic.h"
 #include "llvm/ADT/SmallVector.h"
 
 namespace clang {
@@ -47,7 +47,7 @@ class TemplateDeductionInfo {
 
 public:
   TemplateDeductionInfo(SourceLocation Loc)
-    : Deduced(0), Loc(Loc), HasSFINAEDiagnostic(false) { }
+    : Deduced(0), Loc(Loc), HasSFINAEDiagnostic(false), Expression(0) { }
 
   /// \brief Returns the location at which template argument is
   /// occurring.
@@ -141,15 +141,25 @@ public:
   ///   TDK_SubstitutionFailure: this argument is the template
   ///   argument we were instantiating when we encountered an error.
   ///
-  ///   TDK_NonDeducedMismatch: this is the template argument
-  ///   provided in the source code.
+  ///   TDK_NonDeducedMismatch: this is the component of the 'parameter'
+  ///   of the deduction, directly provided in the source code.
   TemplateArgument FirstArg;
 
   /// \brief The second template argument to which the template
   /// argument deduction failure refers.
   ///
+  ///   TDK_NonDeducedMismatch: this is the mismatching component of the
+  ///   'argument' of the deduction, from which we are deducing arguments.
+  ///
   /// FIXME: Finish documenting this.
   TemplateArgument SecondArg;
+
+  /// \brief The expression which caused a deduction failure.
+  ///
+  ///   TDK_FailedOverloadResolution: this argument is the reference to
+  //    an overloaded function which could not be resolved to a specific
+  //    function.
+  Expr *Expression;
 };
 
 }
diff --git a/include/clang/Sema/TypoCorrection.h b/include/clang/Sema/TypoCorrection.h
index 2b4a9e6..cdd71c8 100644
--- a/include/clang/Sema/TypoCorrection.h
+++ b/include/clang/Sema/TypoCorrection.h
@@ -16,6 +16,7 @@
 #define LLVM_CLANG_SEMA_TYPOCORRECTION_H
 
 #include "clang/AST/DeclCXX.h"
+#include "clang/Sema/DeclSpec.h"
 #include "llvm/ADT/SmallVector.h"
 
 namespace clang {
@@ -181,12 +182,12 @@ public:
     return CorrectionRange;
   }
 
-  typedef llvm::SmallVector<NamedDecl*, 1>::iterator decl_iterator;
+  typedef SmallVector<NamedDecl *, 1>::iterator decl_iterator;
   decl_iterator begin() {
     return isKeyword() ? CorrectionDecls.end() : CorrectionDecls.begin();
   }
   decl_iterator end() { return CorrectionDecls.end(); }
-  typedef llvm::SmallVector<NamedDecl*, 1>::const_iterator const_decl_iterator;
+  typedef SmallVector<NamedDecl *, 1>::const_iterator const_decl_iterator;
   const_decl_iterator begin() const {
     return isKeyword() ? CorrectionDecls.end() : CorrectionDecls.begin();
   }
@@ -200,7 +201,7 @@ private:
   // Results.
   DeclarationName CorrectionName;
   NestedNameSpecifier *CorrectionNameSpec;
-  llvm::SmallVector<NamedDecl*, 1> CorrectionDecls;
+  SmallVector<NamedDecl *, 1> CorrectionDecls;
   unsigned CharDistance;
   unsigned QualifierDistance;
   unsigned CallbackDistance;
@@ -227,9 +228,11 @@ class CorrectionCandidateCallback {
   /// candidate is viable, without ranking potentially viable candidates.
   /// Only ValidateCandidate or RankCandidate need to be overriden by a
   /// callback wishing to check the viability of correction candidates.
-  virtual bool ValidateCandidate(const TypoCorrection &candidate) {
-    return true;
-  }
+  /// The default predicate always returns true if the candidate is not a type
+  /// name or keyword, true for types if WantTypeSpecifiers is true, and true
+  /// for keywords if WantTypeSpecifiers, WantExpressionKeywords,
+  /// WantCXXNamedCasts, WantRemainingKeywords, or WantObjCSuper is true.
+  virtual bool ValidateCandidate(const TypoCorrection &candidate);
 
   /// \brief Method used by Sema::CorrectTypo to assign an "edit distance" rank
   /// to a candidate (where a lower value represents a better candidate), or
diff --git a/include/clang/Serialization/ASTBitCodes.h b/include/clang/Serialization/ASTBitCodes.h
index 8c58fb2..9b685ba 100644
--- a/include/clang/Serialization/ASTBitCodes.h
+++ b/include/clang/Serialization/ASTBitCodes.h
@@ -18,9 +18,9 @@
 #define LLVM_CLANG_FRONTEND_PCHBITCODES_H
 
 #include "clang/AST/Type.h"
+#include "llvm/ADT/DenseMap.h"
 #include "llvm/Bitcode/BitCodes.h"
 #include "llvm/Support/DataTypes.h"
-#include "llvm/ADT/DenseMap.h"
 
 namespace clang {
   namespace serialization {
@@ -35,7 +35,7 @@ namespace clang {
     /// Version 4 of AST files also requires that the version control branch and
     /// revision match exactly, since there is no backward compatibility of
     /// AST files at this time.
-    const unsigned VERSION_MAJOR = 4;
+    const unsigned VERSION_MAJOR = 5;
 
     /// \brief AST file minor version number supported by this version of
     /// Clang.
@@ -129,7 +129,14 @@ namespace clang {
 
     /// \brief An ID number that refers to a macro in an AST file.
     typedef uint32_t MacroID;
-    
+
+    /// \brief A global ID number that refers to a macro in an AST file.
+    typedef uint32_t GlobalMacroID;
+
+    /// \brief A local to a module ID number that refers to a macro in an
+    /// AST file.
+    typedef uint32_t LocalMacroID;
+
     /// \brief The number of predefined macro IDs.
     const unsigned int NUM_PREDEF_MACRO_IDS = 1;
 
@@ -259,21 +266,25 @@ namespace clang {
       /// \brief The directory that the PCH was originally created in.
       ORIGINAL_PCH_DIR = 6,
 
+      /// \brief Record code for file ID of the file or buffer that was used to
+      /// generate the AST file.
+      ORIGINAL_FILE_ID = 7,
+
       /// \brief Offsets into the input-files block where input files
       /// reside.
-      INPUT_FILE_OFFSETS = 7,
+      INPUT_FILE_OFFSETS = 8,
 
       /// \brief Record code for the diagnostic options table.
-      DIAGNOSTIC_OPTIONS = 8,
+      DIAGNOSTIC_OPTIONS = 9,
 
       /// \brief Record code for the filesystem options table.
-      FILE_SYSTEM_OPTIONS = 9,
+      FILE_SYSTEM_OPTIONS = 10,
 
       /// \brief Record code for the headers search options table.
-      HEADER_SEARCH_OPTIONS = 10,
+      HEADER_SEARCH_OPTIONS = 11,
 
       /// \brief Record code for the preprocessor options table.
-      PREPROCESSOR_OPTIONS = 11
+      PREPROCESSOR_OPTIONS = 12
     };
 
     /// \brief Record types that occur within the input-files block
@@ -319,6 +330,11 @@ namespace clang {
       /// NULL-terminated string that corresponds to that identifier.
       IDENTIFIER_OFFSET = 3,
 
+      /// \brief This is so that older clang versions, before the introduction
+      /// of the control block, can read and reject the newer PCH format.
+      /// *DON"T CHANGE THIS NUMBER*.
+      METADATA_OLD_FORMAT = 4,
+
       /// \brief Record code for the identifier table.
       ///
       /// The identifier table is a simple blob that contains
@@ -331,7 +347,7 @@ namespace clang {
       /// between offsets (for unresolved identifier IDs) and
       /// IdentifierInfo pointers (for already-resolved identifier
       /// IDs).
-      IDENTIFIER_TABLE = 4,
+      IDENTIFIER_TABLE = 5,
 
       /// \brief Record code for the array of external definitions.
       ///
@@ -341,7 +357,7 @@ namespace clang {
       /// reported to the AST consumer after the AST file has been
       /// read, since their presence can affect the semantics of the
       /// program (e.g., for code generation).
-      EXTERNAL_DEFINITIONS = 5,
+      EXTERNAL_DEFINITIONS = 6,
 
       /// \brief Record code for the set of non-builtin, special
       /// types.
@@ -350,33 +366,33 @@ namespace clang {
       /// that are constructed during semantic analysis (e.g.,
       /// __builtin_va_list). The SPECIAL_TYPE_* constants provide
       /// offsets into this record.
-      SPECIAL_TYPES = 6,
+      SPECIAL_TYPES = 7,
 
       /// \brief Record code for the extra statistics we gather while
       /// generating an AST file.
-      STATISTICS = 7,
+      STATISTICS = 8,
 
       /// \brief Record code for the array of tentative definitions.
-      TENTATIVE_DEFINITIONS = 8,
+      TENTATIVE_DEFINITIONS = 9,
 
-      /// \brief Record code for the array of locally-scoped external
+      /// \brief Record code for the array of locally-scoped extern "C"
       /// declarations.
-      LOCALLY_SCOPED_EXTERNAL_DECLS = 9,
+      LOCALLY_SCOPED_EXTERN_C_DECLS = 10,
 
       /// \brief Record code for the table of offsets into the
       /// Objective-C method pool.
-      SELECTOR_OFFSETS = 10,
+      SELECTOR_OFFSETS = 11,
 
       /// \brief Record code for the Objective-C method pool,
-      METHOD_POOL = 11,
+      METHOD_POOL = 12,
 
       /// \brief The value of the next __COUNTER__ to dispense.
       /// [PP_COUNTER_VALUE, Val]
-      PP_COUNTER_VALUE = 12,
+      PP_COUNTER_VALUE = 13,
 
       /// \brief Record code for the table of offsets into the block
       /// of source-location information.
-      SOURCE_LOCATION_OFFSETS = 13,
+      SOURCE_LOCATION_OFFSETS = 14,
 
       /// \brief Record code for the set of source location entries
       /// that need to be preloaded by the AST reader.
@@ -384,7 +400,7 @@ namespace clang {
       /// This set contains the source location entry for the
       /// predefines buffer and for any file entries that need to be
       /// preloaded.
-      SOURCE_LOCATION_PRELOADS = 14,
+      SOURCE_LOCATION_PRELOADS = 15,
 
       /// \brief Record code for the set of ext_vector type names.
       EXT_VECTOR_DECLS = 16,
@@ -513,9 +529,13 @@ namespace clang {
       /// macro definition.
       MACRO_OFFSET = 47,
 
-      /// \brief Record of updates for a macro that was modified after
-      /// being deserialized.
-      MACRO_UPDATES = 48
+      /// \brief Mapping table from the identifier ID to the offset of the
+      /// macro directive history for the identifier.
+      MACRO_TABLE = 48,
+
+      /// \brief Record code for undefined but used functions and variables that
+      /// need a definition in this TU.
+      UNDEFINED_BUT_USED = 49
     };
 
     /// \brief Record types used within a source manager block.
@@ -552,7 +572,10 @@ namespace clang {
 
       /// \brief Describes one token.
       /// [PP_TOKEN, SLoc, Length, IdentInfoID, Kind, Flags]
-      PP_TOKEN = 3
+      PP_TOKEN = 3,
+
+      /// \brief The macro directives history for a particular identifier.
+      PP_MACRO_DIRECTIVE_HISTORY = 4
     };
 
     /// \brief Record types used within a preprocessor detail block.
@@ -594,7 +617,13 @@ namespace clang {
       SUBMODULE_REQUIRES = 8,
       /// \brief Specifies a header that has been explicitly excluded
       /// from this submodule.
-      SUBMODULE_EXCLUDED_HEADER = 9
+      SUBMODULE_EXCLUDED_HEADER = 9,
+      /// \brief Specifies a library or framework to link against.
+      SUBMODULE_LINK_LIBRARY = 10,
+      /// \brief Specifies a configuration macro for this module.
+      SUBMODULE_CONFIG_MACRO = 11,
+      /// \brief Specifies a conflict with another module.
+      SUBMODULE_CONFLICT = 12
     };
 
     /// \brief Record types used within a comments block.
@@ -692,7 +721,23 @@ namespace clang {
       /// \brief The __va_list_tag placeholder type.
       PREDEF_TYPE_VA_LIST_TAG = 36,
       /// \brief The placeholder type for builtin functions.
-      PREDEF_TYPE_BUILTIN_FN = 37
+      PREDEF_TYPE_BUILTIN_FN = 37,
+      /// \brief OpenCL 1d image type.
+      PREDEF_TYPE_IMAGE1D_ID    = 38,
+      /// \brief OpenCL 1d image array type.
+      PREDEF_TYPE_IMAGE1D_ARR_ID = 39,
+      /// \brief OpenCL 1d image buffer type.
+      PREDEF_TYPE_IMAGE1D_BUFF_ID = 40,
+      /// \brief OpenCL 2d image type.
+      PREDEF_TYPE_IMAGE2D_ID    = 41,
+      /// \brief OpenCL 2d image array type.
+      PREDEF_TYPE_IMAGE2D_ARR_ID = 42,
+      /// \brief OpenCL 3d image type.
+      PREDEF_TYPE_IMAGE3D_ID    = 43,
+      /// \brief OpenCL event type.
+      PREDEF_TYPE_EVENT_ID      = 44,
+      /// \brief OpenCL sampler type.
+      PREDEF_TYPE_SAMPLER_ID    = 45
     };
 
     /// \brief The number of predefined type IDs that are reserved for
@@ -1000,7 +1045,11 @@ namespace clang {
       /// function specialization. (Microsoft extension).
       DECL_CLASS_SCOPE_FUNCTION_SPECIALIZATION,
       /// \brief An ImportDecl recording a module import.
-      DECL_IMPORT
+      DECL_IMPORT,
+      /// \brief A OMPThreadPrivateDecl record.
+      DECL_OMP_THREADPRIVATE,
+      /// \brief An EmptyDecl record.
+      DECL_EMPTY
     };
 
     /// \brief Record codes for each kind of statement or expression.
diff --git a/include/clang/Serialization/ASTReader.h b/include/clang/Serialization/ASTReader.h
index e23ea5c..9255336 100644
--- a/include/clang/Serialization/ASTReader.h
+++ b/include/clang/Serialization/ASTReader.h
@@ -14,33 +14,33 @@
 #ifndef LLVM_CLANG_FRONTEND_AST_READER_H
 #define LLVM_CLANG_FRONTEND_AST_READER_H
 
-#include "clang/Serialization/ASTBitCodes.h"
-#include "clang/Serialization/ContinuousRangeMap.h"
-#include "clang/Serialization/Module.h"
-#include "clang/Serialization/ModuleManager.h"
-#include "clang/Sema/ExternalSemaSource.h"
-#include "clang/AST/DeclarationName.h"
 #include "clang/AST/DeclObjC.h"
+#include "clang/AST/DeclarationName.h"
 #include "clang/AST/TemplateBase.h"
-#include "clang/Lex/ExternalPreprocessorSource.h"
-#include "clang/Lex/HeaderSearch.h"
-#include "clang/Lex/PPMutationListener.h"
-#include "clang/Lex/PreprocessingRecord.h"
 #include "clang/Basic/Diagnostic.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/FileSystemOptions.h"
 #include "clang/Basic/IdentifierTable.h"
 #include "clang/Basic/SourceManager.h"
+#include "clang/Basic/Version.h"
+#include "clang/Lex/ExternalPreprocessorSource.h"
+#include "clang/Lex/HeaderSearch.h"
+#include "clang/Lex/PreprocessingRecord.h"
+#include "clang/Sema/ExternalSemaSource.h"
+#include "clang/Serialization/ASTBitCodes.h"
+#include "clang/Serialization/ContinuousRangeMap.h"
+#include "clang/Serialization/Module.h"
+#include "clang/Serialization/ModuleManager.h"
 #include "llvm/ADT/APFloat.h"
 #include "llvm/ADT/APInt.h"
 #include "llvm/ADT/APSInt.h"
+#include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/MapVector.h"
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/ADT/SmallSet.h"
 #include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringRef.h"
-#include "llvm/ADT/DenseSet.h"
 #include "llvm/Bitcode/BitstreamReader.h"
 #include "llvm/Support/DataTypes.h"
 #include <deque>
@@ -48,6 +48,7 @@
 #include <string>
 #include <utility>
 #include <vector>
+#include <sys/stat.h>
 
 namespace llvm {
   class MemoryBuffer;
@@ -68,8 +69,10 @@ class NestedNameSpecifier;
 class CXXBaseSpecifier;
 class CXXConstructorDecl;
 class CXXCtorInitializer;
+class GlobalModuleIndex;
 class GotoStmt;
 class MacroDefinition;
+class MacroDirective;
 class NamedDecl;
 class OpaqueValueExpr;
 class Preprocessor;
@@ -85,6 +88,7 @@ class TypeLocReader;
 struct HeaderFileInfo;
 class VersionTuple;
 class TargetOptions;
+class ASTUnresolvedSet;
 
 /// \brief Abstract interface for callback invocations by the ASTReader.
 ///
@@ -96,6 +100,14 @@ class ASTReaderListener {
 public:
   virtual ~ASTReaderListener();
 
+  /// \brief Receives the full Clang version information.
+  ///
+  /// \returns true to indicate that the version is invalid. Subclasses should
+  /// generally defer to this implementation.
+  virtual bool ReadFullVersionInformation(StringRef FullVersion) {
+    return FullVersion != getClangFullRepositoryVersion();
+  }
+
   /// \brief Receives the language options.
   ///
   /// \returns true to indicate the options are invalid or false otherwise.
@@ -233,6 +245,8 @@ public:
     Success,
     /// \brief The AST file itself appears corrupted.
     Failure,
+    /// \brief The AST file was missing.
+    Missing,
     /// \brief The AST file is out-of-date relative to its input files,
     /// and needs to be regenerated.
     OutOfDate,
@@ -291,6 +305,9 @@ private:
   /// \brief The module manager which manages modules and their dependencies
   ModuleManager ModuleMgr;
 
+  /// \brief The global module index, if loaded.
+  llvm::OwningPtr<GlobalModuleIndex> GlobalIndex;
+
   /// \brief A map of global bit offsets to the module that stores entities
   /// at those bit offsets.
   ContinuousRangeMap<uint64_t, ModuleFile*, 4> GlobalBitOffsetsMap;
@@ -387,7 +404,7 @@ private:
 
   typedef llvm::MapVector<Decl *, uint64_t,
                           llvm::SmallDenseMap<Decl *, unsigned, 4>,
-                          llvm::SmallVector<std::pair<Decl *, uint64_t>, 4> >
+                          SmallVector<std::pair<Decl *, uint64_t>, 4> >
     PendingBodiesMap;
 
   /// \brief Functions or methods that have bodies that will be attached.
@@ -431,15 +448,6 @@ private:
   /// global macro ID to produce a local ID.
   GlobalMacroMapType GlobalMacroMap;
 
-  typedef llvm::DenseMap<serialization::MacroID,
-            llvm::SmallVector<std::pair<serialization::SubmoduleID,
-                                        MacroUpdate>, 1> >
-    MacroUpdatesMap;
-
-  /// \brief Mapping from (global) macro IDs to the set of updates to be
-  /// performed to the corresponding macro.
-  MacroUpdatesMap MacroUpdates;
-
   /// \brief A vector containing submodules that have already been loaded.
   ///
   /// This vector is indexed by the Submodule ID (-1). NULL submodule entries
@@ -459,28 +467,22 @@ private:
   public:
     enum NameKind {
       Declaration,
-      MacroVisibility,
-      MacroUndef
+      MacroVisibility
     } Kind;
 
   private:
-    unsigned Loc;
-
     union {
       Decl *D;
-      MacroInfo *MI;
+      MacroDirective *MD;
     };
 
     IdentifierInfo *Id;
 
   public:
-    HiddenName(Decl *D) : Kind(Declaration), Loc(), D(D), Id() { }
+    HiddenName(Decl *D) : Kind(Declaration), D(D), Id() { }
 
-    HiddenName(IdentifierInfo *II, MacroInfo *MI)
-      : Kind(MacroVisibility), Loc(), MI(MI), Id(II) { }
-
-    HiddenName(IdentifierInfo *II, MacroInfo *MI, SourceLocation Loc)
-      : Kind(MacroUndef), Loc(Loc.getRawEncoding()), MI(MI), Id(II) { }
+    HiddenName(IdentifierInfo *II, MacroDirective *MD)
+      : Kind(MacroVisibility), MD(MD), Id(II) { }
 
     NameKind getKind() const { return Kind; }
 
@@ -489,21 +491,14 @@ private:
       return D;
     }
 
-    std::pair<IdentifierInfo *, MacroInfo *> getMacro() const {
-      assert((getKind() == MacroUndef || getKind() == MacroVisibility)
-             && "Hidden name is not a macro!");
-      return std::make_pair(Id, MI);
-    }
-
-    SourceLocation getMacroUndefLoc() const {
-      assert(getKind() == MacroUndef && "Hidden name is not an undef!");
-      return SourceLocation::getFromRawEncoding(Loc);
+    std::pair<IdentifierInfo *, MacroDirective *> getMacro() const {
+      assert(getKind() == MacroVisibility && "Hidden name is not a macro!");
+      return std::make_pair(Id, MD);
     }
 };
 
   /// \brief A set of hidden declarations.
-  typedef llvm::SmallVector<HiddenName, 2>
-    HiddenNames;
+  typedef SmallVector<HiddenName, 2> HiddenNames;
   
   typedef llvm::DenseMap<Module *, HiddenNames> HiddenNamesMapType;
 
@@ -512,28 +507,30 @@ private:
   HiddenNamesMapType HiddenNamesMap;
   
   
-  /// \brief A module import or export that hasn't yet been resolved.
-  struct UnresolvedModuleImportExport {
+  /// \brief A module import, export, or conflict that hasn't yet been resolved.
+  struct UnresolvedModuleRef {
     /// \brief The file in which this module resides.
     ModuleFile *File;
     
     /// \brief The module that is importing or exporting.
     Module *Mod;
-    
+
+    /// \brief The kind of module reference.
+    enum { Import, Export, Conflict } Kind;
+
     /// \brief The local ID of the module that is being exported.
     unsigned ID;
-    
-    /// \brief Whether this is an import (vs. an export).
-    unsigned IsImport : 1;
-    
+
     /// \brief Whether this is a wildcard export.
     unsigned IsWildcard : 1;
+
+    /// \brief String data.
+    StringRef String;
   };
   
   /// \brief The set of module imports and exports that still need to be 
   /// resolved.
-  llvm::SmallVector<UnresolvedModuleImportExport, 2> 
-    UnresolvedModuleImportExports;
+  SmallVector<UnresolvedModuleRef, 2> UnresolvedModuleRefs;
   
   /// \brief A vector containing selectors that have already been loaded.
   ///
@@ -546,7 +543,7 @@ private:
     GlobalSelectorMapType;
 
   /// \brief Mapping from global selector IDs to the module in which the
-  /// selector resides along with the offset that should be added to the
+
   /// global selector ID to produce a local ID.
   GlobalSelectorMapType GlobalSelectorMap;
 
@@ -554,8 +551,35 @@ private:
   /// global method pool for this selector.
   llvm::DenseMap<Selector, unsigned> SelectorGeneration;
 
-  typedef llvm::MapVector<IdentifierInfo *,
-                          llvm::SmallVector<serialization::MacroID, 2> >
+  struct PendingMacroInfo {
+    ModuleFile *M;
+
+    struct ModuleMacroDataTy {
+      serialization::GlobalMacroID GMacID;
+      unsigned ImportLoc;
+    };
+    struct PCHMacroDataTy {
+      uint64_t MacroDirectivesOffset;
+    };
+
+    union {
+      ModuleMacroDataTy ModuleMacroData;
+      PCHMacroDataTy PCHMacroData;
+    };
+
+    PendingMacroInfo(ModuleFile *M,
+                     serialization::GlobalMacroID GMacID,
+                     SourceLocation ImportLoc) : M(M) {
+      ModuleMacroData.GMacID = GMacID;
+      ModuleMacroData.ImportLoc = ImportLoc.getRawEncoding();
+    }
+
+    PendingMacroInfo(ModuleFile *M, uint64_t MacroDirectivesOffset) : M(M) {
+      PCHMacroData.MacroDirectivesOffset = MacroDirectivesOffset;
+    }
+  };
+
+  typedef llvm::MapVector<IdentifierInfo *, SmallVector<PendingMacroInfo, 2> >
     PendingMacroIDsMap;
 
   /// \brief Mapping from identifiers that have a macro history to the global
@@ -637,11 +661,11 @@ private:
   /// \brief Fields containing data that is used for semantic analysis
   //@{
 
-  /// \brief The IDs of all locally scoped external decls in the chain.
+  /// \brief The IDs of all locally scoped extern "C" decls in the chain.
   ///
   /// Sema tracks these to validate that the types are consistent across all
-  /// local external declarations.
-  SmallVector<uint64_t, 16> LocallyScopedExternalDecls;
+  /// local extern "C" declarations.
+  SmallVector<uint64_t, 16> LocallyScopedExternCDecls;
 
   /// \brief The IDs of all dynamic class declarations in the chain.
   ///
@@ -674,6 +698,10 @@ private:
   /// \brief A list of the namespaces we've seen.
   SmallVector<uint64_t, 4> KnownNamespaces;
 
+  /// \brief A list of undefined decls with internal linkage followed by the
+  /// SourceLocation of a matching ODR-use.
+  SmallVector<uint64_t, 8> UndefinedButUsed;
+
   /// \brief A list of modules that were imported by precompiled headers or
   /// any other non-module AST file.
   SmallVector<serialization::SubmoduleID, 2> ImportedModules;
@@ -693,6 +721,12 @@ private:
   /// \brief Whether to accept an AST file with compiler errors.
   bool AllowASTWithCompilerErrors;
 
+  /// \brief Whether we are allowed to use the global module index.
+  bool UseGlobalIndex;
+
+  /// \brief Whether we have tried loading the global module index yet.
+  bool TriedLoadingGlobalIndex;
+
   /// \brief The current "generation" of the module file import stack, which 
   /// indicates how many separate module file load operations have occurred.
   unsigned CurrentGeneration;
@@ -727,6 +761,12 @@ private:
   /// \brief The total number of macros stored in the chain.
   unsigned TotalNumMacros;
 
+  /// \brief The number of lookups into identifier tables.
+  unsigned NumIdentifierLookups;
+
+  /// \brief The number of lookups into identifier tables that succeed.
+  unsigned NumIdentifierLookupHits;
+
   /// \brief The number of selectors that have been read.
   unsigned NumSelectorsRead;
 
@@ -734,8 +774,20 @@ private:
   unsigned NumMethodPoolEntriesRead;
 
   /// \brief The number of times we have looked up a selector in the method
-  /// pool and not found anything interesting.
-  unsigned NumMethodPoolMisses;
+  /// pool.
+  unsigned NumMethodPoolLookups;
+
+  /// \brief The number of times we have looked up a selector in the method
+  /// pool and found something.
+  unsigned NumMethodPoolHits;
+
+  /// \brief The number of times we have looked up a selector in the method
+  /// pool within a specific module.
+  unsigned NumMethodPoolTableLookups;
+
+  /// \brief The number of times we have looked up a selector in the method
+  /// pool within a specific module and found something.
+  unsigned NumMethodPoolTableHits;
 
   /// \brief The total number of method pool entries in the selector table.
   unsigned TotalNumMethodPoolEntries;
@@ -761,19 +813,13 @@ private:
   /// Number of CXX base specifiers currently loaded
   unsigned NumCXXBaseSpecifiersLoaded;
 
-  /// \brief An IdentifierInfo that has been loaded but whose top-level
-  /// declarations of the same name have not (yet) been loaded.
-  struct PendingIdentifierInfo {
-    IdentifierInfo *II;
-    SmallVector<uint32_t, 4> DeclIDs;
-  };
-
   /// \brief The set of identifiers that were read while the AST reader was
   /// (recursively) loading declarations.
   ///
   /// The declarations on the identifier chain for these identifiers will be
   /// loaded once the recursive loading has completed.
-  std::deque<PendingIdentifierInfo> PendingIdentifierInfos;
+  llvm::MapVector<IdentifierInfo *, SmallVector<uint32_t, 4> >
+    PendingIdentifierInfos;
 
   /// \brief The generation number of each identifier, which keeps track of
   /// the last time we loaded information about this identifier.
@@ -797,11 +843,26 @@ private:
   /// Each element is the global declaration ID of the first declaration in
   /// the chain. Elements in this vector should be unique; use 
   /// PendingDeclChainsKnown to ensure uniqueness.
-  llvm::SmallVector<serialization::DeclID, 16> PendingDeclChains;
+  SmallVector<serialization::DeclID, 16> PendingDeclChains;
 
   /// \brief Keeps track of the elements added to PendingDeclChains.
   llvm::SmallSet<serialization::DeclID, 16> PendingDeclChainsKnown;
 
+  /// \brief The Decl IDs for the Sema/Lexical DeclContext of a Decl that has
+  /// been loaded but its DeclContext was not set yet.
+  struct PendingDeclContextInfo {
+    Decl *D;
+    serialization::GlobalDeclID SemaDC;
+    serialization::GlobalDeclID LexicalDC;
+  };
+
+  /// \brief The set of Decls that have been loaded but their DeclContexts are
+  /// not set yet.
+  ///
+  /// The DeclContexts for these Decls will be set once recursive loading has
+  /// been completed.
+  std::deque<PendingDeclContextInfo> PendingDeclContextInfos;
+
   /// \brief The set of Objective-C categories that have been deserialized
   /// since the last time the declaration chains were linked.
   llvm::SmallPtrSet<ObjCCategoryDecl *, 16> CategoriesDeserialized;
@@ -809,9 +870,9 @@ private:
   /// \brief The set of Objective-C class definitions that have already been
   /// loaded, for which we will need to check for categories whenever a new
   /// module is loaded.
-  llvm::SmallVector<ObjCInterfaceDecl *, 16> ObjCClassesLoaded;
+  SmallVector<ObjCInterfaceDecl *, 16> ObjCClassesLoaded;
   
-  typedef llvm::DenseMap<Decl *, llvm::SmallVector<serialization::DeclID, 2> >
+  typedef llvm::DenseMap<Decl *, SmallVector<serialization::DeclID, 2> >
     MergedDeclsMap;
     
   /// \brief A mapping from canonical declarations to the set of additional
@@ -820,7 +881,7 @@ private:
   MergedDeclsMap MergedDecls;
   
   typedef llvm::DenseMap<serialization::GlobalDeclID, 
-                         llvm::SmallVector<serialization::DeclID, 2> >
+                         SmallVector<serialization::DeclID, 2> >
     StoredMergedDeclsMap;
   
   /// \brief A mapping from canonical declaration IDs to the set of additional
@@ -883,11 +944,10 @@ private:
   /// \brief Reads a statement from the specified cursor.
   Stmt *ReadStmtFromStream(ModuleFile &F);
 
-  typedef llvm::PointerIntPair<const FileEntry *, 1, bool> InputFile;
-
   /// \brief Retrieve the file entry and 'overridden' bit for an input
   /// file in the given module file.
-  InputFile getInputFile(ModuleFile &F, unsigned ID, bool Complain = true);
+  serialization::InputFile getInputFile(ModuleFile &F, unsigned ID,
+                                        bool Complain = true);
 
   /// \brief Get a FileEntry out of stored-in-PCH filename, making sure we take
   /// into account all the necessary relocations.
@@ -895,12 +955,24 @@ private:
 
   void MaybeAddSystemRootToFilename(ModuleFile &M, std::string &Filename);
 
+  struct ImportedModule {
+    ModuleFile *Mod;
+    ModuleFile *ImportedBy;
+    SourceLocation ImportLoc;
+
+    ImportedModule(ModuleFile *Mod,
+                   ModuleFile *ImportedBy,
+                   SourceLocation ImportLoc)
+      : Mod(Mod), ImportedBy(ImportedBy), ImportLoc(ImportLoc) { }
+  };
+
   ASTReadResult ReadASTCore(StringRef FileName, ModuleKind Type,
-                            ModuleFile *ImportedBy,
-                            llvm::SmallVectorImpl<ModuleFile *> &Loaded,
+                            SourceLocation ImportLoc, ModuleFile *ImportedBy,
+                            SmallVectorImpl<ImportedModule> &Loaded,
+                            off_t ExpectedSize, time_t ExpectedModTime,
                             unsigned ClientLoadCapabilities);
   ASTReadResult ReadControlBlock(ModuleFile &F,
-                                 llvm::SmallVectorImpl<ModuleFile *> &Loaded,
+                                 SmallVectorImpl<ImportedModule> &Loaded,
                                  unsigned ClientLoadCapabilities);
   bool ReadASTBlock(ModuleFile &F);
   bool ParseLineTable(ModuleFile &F, SmallVectorImpl<uint64_t> &Record);
@@ -1034,6 +1106,14 @@ private:
 
   void finishPendingActions();
 
+  void addPendingDeclContextInfo(Decl *D,
+                                 serialization::GlobalDeclID SemaDC,
+                                 serialization::GlobalDeclID LexicalDC) {
+    assert(D);
+    PendingDeclContextInfo Info = { D, SemaDC, LexicalDC };
+    PendingDeclContextInfos.push_back(Info);
+  }
+
   /// \brief Produce an error diagnostic and return true.
   ///
   /// This routine should only be used for fatal errors that have to
@@ -1065,13 +1145,18 @@ public:
   /// \param AllowASTWithCompilerErrors If true, the AST reader will accept an
   /// AST file the was created out of an AST with compiler errors,
   /// otherwise it will reject it.
+  ///
+  /// \param UseGlobalIndex If true, the AST reader will try to load and use
+  /// the global module index.
   ASTReader(Preprocessor &PP, ASTContext &Context, StringRef isysroot = "",
             bool DisableValidation = false,
-            bool AllowASTWithCompilerErrors = false);
+            bool AllowASTWithCompilerErrors = false,
+            bool UseGlobalIndex = true);
 
   ~ASTReader();
 
   SourceManager &getSourceManager() const { return SourceMgr; }
+  FileManager &getFileManager() const { return FileMgr; }
 
   /// \brief Flags that indicate what kind of AST loading failures the client
   /// of the AST reader can directly handle.
@@ -1082,15 +1167,18 @@ public:
     /// \brief The client can't handle any AST loading failures.
     ARR_None = 0,
     /// \brief The client can handle an AST file that cannot load because it
+    /// is missing.
+    ARR_Missing = 0x1,
+    /// \brief The client can handle an AST file that cannot load because it
     /// is out-of-date relative to its input files.
-    ARR_OutOfDate = 0x1,
+    ARR_OutOfDate = 0x2,
     /// \brief The client can handle an AST file that cannot load because it
     /// was built with a different version of Clang.
-    ARR_VersionMismatch = 0x2,
+    ARR_VersionMismatch = 0x4,
     /// \brief The client can handle an AST file that cannot load because it's
     /// compiled configuration doesn't match that of the context it was
     /// loaded into.
-    ARR_ConfigurationMismatch = 0x4
+    ARR_ConfigurationMismatch = 0x8
   };
 
   /// \brief Load the AST file designated by the given file name.
@@ -1100,10 +1188,14 @@ public:
   /// \param Type The kind of AST being loaded, e.g., PCH, module, main file,
   /// or preamble.
   ///
+  /// \param ImportLoc the location where the module file will be considered as
+  /// imported from. For non-module AST types it should be invalid.
+  ///
   /// \param ClientLoadCapabilities The set of client load-failure
   /// capabilities, represented as a bitset of the enumerators of
   /// LoadFailureCapabilities.
   ASTReadResult ReadAST(const std::string &FileName, ModuleKind Type,
+                        SourceLocation ImportLoc,
                         unsigned ClientLoadCapabilities);
 
   /// \brief Make the entities in the given module and any of its (non-explicit)
@@ -1113,11 +1205,17 @@ public:
   ///
   /// \param NameVisibility The level of visibility to give the names in the
   /// module.  Visibility can only be increased over time.
+  ///
+  /// \param ImportLoc The location at which the import occurs.
+  ///
+  /// \param Complain Whether to complain about conflicting module imports.
   void makeModuleVisible(Module *Mod, 
-                         Module::NameVisibilityKind NameVisibility);
+                         Module::NameVisibilityKind NameVisibility,
+                         SourceLocation ImportLoc,
+                         bool Complain);
   
   /// \brief Make the names within this set of hidden names visible.
-  void makeNamesVisible(const HiddenNames &Names);
+  void makeNamesVisible(const HiddenNames &Names, Module *Owner);
   
   /// \brief Set the AST callbacks listener.
   void setListener(ASTReaderListener *listener) {
@@ -1127,6 +1225,18 @@ public:
   /// \brief Set the AST deserialization listener.
   void setDeserializationListener(ASTDeserializationListener *Listener);
 
+  /// \brief Determine whether this AST reader has a global index.
+  bool hasGlobalIndex() const { return GlobalIndex; }
+
+  /// \brief Attempts to load the global index.
+  ///
+  /// \returns true if loading the global index has failed for any reason.
+  bool loadGlobalIndex();
+
+  /// \brief Determine whether we tried to load the global index, but failed,
+  /// e.g., because it is out-of-date or does not exist.
+  bool isGlobalIndexUnavailable() const;
+  
   /// \brief Initializes the ASTContext
   void InitializeContext();
 
@@ -1193,8 +1303,8 @@ public:
 
   /// \brief Optionally returns true or false if the preallocated preprocessed
   /// entity with index \p Index came from file \p FID.
-  virtual llvm::Optional<bool> isPreprocessedEntityInFileID(unsigned Index,
-                                                            FileID FID);
+  virtual Optional<bool> isPreprocessedEntityInFileID(unsigned Index,
+                                                      FileID FID);
 
   /// \brief Read the header file information for the given file entry.
   virtual HeaderFileInfo GetHeaderFileInfo(const FileEntry *FE);
@@ -1297,7 +1407,7 @@ public:
 
   /// \brief Retrieve the module file that owns the given declaration, or NULL
   /// if the declaration is not from a module file.
-  ModuleFile *getOwningModuleFile(Decl *D);
+  ModuleFile *getOwningModuleFile(const Decl *D);
   
   /// \brief Returns the source location for the decl \p ID.
   SourceLocation getSourceLocationForDeclID(serialization::GlobalDeclID ID);
@@ -1374,7 +1484,7 @@ public:
   /// \brief Finds all the visible declarations with a given name.
   /// The current implementation of this method just loads the entire
   /// lookup table as unmaterialized references.
-  virtual DeclContext::lookup_result
+  virtual bool
   FindExternalVisibleDeclsByName(const DeclContext *DC,
                                  DeclarationName Name);
 
@@ -1459,6 +1569,9 @@ public:
   virtual void ReadKnownNamespaces(
                            SmallVectorImpl<NamespaceDecl *> &Namespaces);
 
+  virtual void ReadUndefinedButUsed(
+                        llvm::DenseMap<NamedDecl *, SourceLocation> &Undefined);
+
   virtual void ReadTentativeDefinitions(
                  SmallVectorImpl<VarDecl *> &TentativeDefs);
 
@@ -1472,7 +1585,7 @@ public:
 
   virtual void ReadDynamicClasses(SmallVectorImpl<CXXRecordDecl *> &Decls);
 
-  virtual void ReadLocallyScopedExternalDecls(
+  virtual void ReadLocallyScopedExternCDecls(
                  SmallVectorImpl<NamedDecl *> &Decls);
 
   virtual void ReadReferencedSelectors(
@@ -1493,7 +1606,7 @@ public:
   void SetIdentifierInfo(unsigned ID, IdentifierInfo *II);
   void SetGloballyVisibleDecls(IdentifierInfo *II,
                                const SmallVectorImpl<uint32_t> &DeclIDs,
-                               bool Nonrecursive = false);
+                               SmallVectorImpl<Decl *> *Decls = 0);
 
   /// \brief Report a diagnostic.
   DiagnosticBuilder Diag(unsigned DiagID);
@@ -1520,8 +1633,16 @@ public:
   serialization::IdentifierID getGlobalIdentifierID(ModuleFile &M,
                                                     unsigned LocalID);
 
+  void resolvePendingMacro(IdentifierInfo *II, const PendingMacroInfo &PMInfo);
+
+  void installPCHMacroDirectives(IdentifierInfo *II,
+                                 ModuleFile &M, uint64_t Offset);
+
+  void installImportedMacro(IdentifierInfo *II, MacroDirective *MD,
+                            Module *Owner);
+
   /// \brief Retrieve the macro with the given ID.
-  MacroInfo *getMacro(serialization::MacroID ID, MacroInfo *Hint = 0);
+  MacroInfo *getMacro(serialization::MacroID ID);
 
   /// \brief Retrieve the global macro ID corresponding to the given local
   /// ID within the given module file.
@@ -1530,6 +1651,10 @@ public:
   /// \brief Read the source location entry with index ID.
   virtual bool ReadSLocEntry(int ID);
 
+  /// \brief Retrieve the module import location and module name for the
+  /// given source manager entry ID.
+  virtual std::pair<SourceLocation, StringRef> getModuleImportLoc(int ID);
+
   /// \brief Retrieve the global submodule ID given a module and its local ID
   /// number.
   serialization::SubmoduleID 
@@ -1538,7 +1663,12 @@ public:
   /// \brief Retrieve the submodule that corresponds to a global submodule ID.
   ///
   Module *getSubmodule(serialization::SubmoduleID GlobalID);
-  
+
+  /// \brief Retrieve the module that corresponds to the given module ID.
+  ///
+  /// Note: overrides method in ExternalASTSource
+  virtual Module *getModule(unsigned ID);
+
   /// \brief Retrieve a selector from the given module with its local ID
   /// number.
   Selector getLocalSelector(ModuleFile &M, unsigned LocalID);
@@ -1597,7 +1727,7 @@ public:
                            unsigned &Idx);
 
   /// \brief Read a UnresolvedSet structure.
-  void ReadUnresolvedSet(ModuleFile &F, UnresolvedSetImpl &Set,
+  void ReadUnresolvedSet(ModuleFile &F, ASTUnresolvedSet &Set,
                          const RecordData &Record, unsigned &Idx);
 
   /// \brief Read a C++ base specifier.
@@ -1620,13 +1750,13 @@ public:
 
   /// \brief Read a source location.
   SourceLocation ReadSourceLocation(ModuleFile &ModuleFile,
-                                    const RecordData &Record, unsigned& Idx) {
+                                    const RecordData &Record, unsigned &Idx) {
     return ReadSourceLocation(ModuleFile, Record[Idx++]);
   }
 
   /// \brief Read a source range.
   SourceRange ReadSourceRange(ModuleFile &F,
-                              const RecordData &Record, unsigned& Idx);
+                              const RecordData &Record, unsigned &Idx);
 
   /// \brief Read an integral value
   llvm::APInt ReadAPInt(const RecordData &Record, unsigned &Idx);
@@ -1635,7 +1765,8 @@ public:
   llvm::APSInt ReadAPSInt(const RecordData &Record, unsigned &Idx);
 
   /// \brief Read a floating-point value
-  llvm::APFloat ReadAPFloat(const RecordData &Record, unsigned &Idx);
+  llvm::APFloat ReadAPFloat(const RecordData &Record,
+                            const llvm::fltSemantics &Sem, unsigned &Idx);
 
   // \brief Read a string
   static std::string ReadString(const RecordData &Record, unsigned &Idx);
@@ -1670,20 +1801,32 @@ public:
   Expr *ReadSubExpr();
 
   /// \brief Reads the macro record located at the given offset.
-  void ReadMacroRecord(ModuleFile &F, uint64_t Offset, MacroInfo *Hint = 0);
+  MacroInfo *ReadMacroRecord(ModuleFile &F, uint64_t Offset);
 
   /// \brief Determine the global preprocessed entity ID that corresponds to
   /// the given local ID within the given module.
   serialization::PreprocessedEntityID
   getGlobalPreprocessedEntityID(ModuleFile &M, unsigned LocalID) const;
 
-  /// \brief Note that the identifier has a macro history.
+  /// \brief Add a macro to resolve imported from a module.
   ///
   /// \param II The name of the macro.
+  /// \param M The module file.
+  /// \param GMacID The global macro ID that is associated with this identifier.
+  /// \param ImportLoc The location where the module is imported.
+  void addPendingMacroFromModule(IdentifierInfo *II,
+                                 ModuleFile *M,
+                                 serialization::GlobalMacroID GMacID,
+                                 SourceLocation ImportLoc);
+
+  /// \brief Add a macro to deserialize its macro directive history from a PCH.
   ///
-  /// \param IDs The global macro IDs that are associated with this identifier.
-  void setIdentifierIsMacro(IdentifierInfo *II,
-                            ArrayRef<serialization::MacroID> IDs);
+  /// \param II The name of the macro.
+  /// \param M The module file.
+  /// \param MacroDirectivesOffset Offset of the serialized macro directive
+  /// history.
+  void addPendingMacroFromPCH(IdentifierInfo *II,
+                              ModuleFile *M, uint64_t MacroDirectivesOffset);
 
   /// \brief Read the set of macros defined by this external macro source.
   virtual void ReadDefinedMacros();
@@ -1734,7 +1877,7 @@ public:
 /// then restores it when destroyed.
 struct SavedStreamPosition {
   explicit SavedStreamPosition(llvm::BitstreamCursor &Cursor)
-  : Cursor(Cursor), Offset(Cursor.GetCurrentBitNo()) { }
+    : Cursor(Cursor), Offset(Cursor.GetCurrentBitNo()) { }
 
   ~SavedStreamPosition() {
     Cursor.JumpToBit(Offset);
diff --git a/include/clang/Serialization/ASTWriter.h b/include/clang/Serialization/ASTWriter.h
index ac81e21..2938dc7 100644
--- a/include/clang/Serialization/ASTWriter.h
+++ b/include/clang/Serialization/ASTWriter.h
@@ -14,20 +14,19 @@
 #ifndef LLVM_CLANG_FRONTEND_AST_WRITER_H
 #define LLVM_CLANG_FRONTEND_AST_WRITER_H
 
+#include "clang/AST/ASTMutationListener.h"
 #include "clang/AST/Decl.h"
 #include "clang/AST/DeclarationName.h"
 #include "clang/AST/TemplateBase.h"
-#include "clang/AST/ASTMutationListener.h"
-#include "clang/Lex/PPMutationListener.h"
+#include "clang/Sema/SemaConsumer.h"
 #include "clang/Serialization/ASTBitCodes.h"
 #include "clang/Serialization/ASTDeserializationListener.h"
-#include "clang/Sema/SemaConsumer.h"
-#include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/MapVector.h"
 #include "llvm/ADT/SetVector.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/SmallVector.h"
 #include "llvm/Bitcode/BitstreamWriter.h"
 #include <map>
 #include <queue>
@@ -48,12 +47,14 @@ class CXXCtorInitializer;
 class FileEntry;
 class FPOptions;
 class HeaderSearch;
+class HeaderSearchOptions;
 class IdentifierResolver;
 class MacroDefinition;
+class MacroDirective;
+class MacroInfo;
 class OpaqueValueExpr;
 class OpenCLOptions;
 class ASTReader;
-class MacroInfo;
 class Module;
 class PreprocessedEntity;
 class PreprocessingRecord;
@@ -63,6 +64,7 @@ class SourceManager;
 class SwitchCase;
 class TargetInfo;
 class VersionTuple;
+class ASTUnresolvedSet;
 
 namespace SrcMgr { class SLocEntry; }
 
@@ -73,7 +75,6 @@ namespace SrcMgr { class SLocEntry; }
 /// data structures. This bitstream can be de-serialized via an
 /// instance of the ASTReader class.
 class ASTWriter : public ASTDeserializationListener,
-                  public PPMutationListener,
                   public ASTMutationListener {
 public:
   typedef SmallVector<uint64_t, 64> RecordData;
@@ -231,6 +232,16 @@ private:
   /// \brief Map that provides the ID numbers of each macro.
   llvm::DenseMap<MacroInfo *, serialization::MacroID> MacroIDs;
 
+  struct MacroInfoToEmitData {
+    const IdentifierInfo *Name;
+    MacroInfo *MI;
+    serialization::MacroID ID;
+  };
+  /// \brief The macro infos to emit.
+  std::vector<MacroInfoToEmitData> MacroInfosToEmit;
+
+  llvm::DenseMap<const IdentifierInfo *, uint64_t> IdentMacroDirectivesOffsetMap;
+
   /// @name FlushStmt Caches
   /// @{
 
@@ -266,11 +277,6 @@ private:
   /// table, indexed by the Selector ID (-1).
   std::vector<uint32_t> SelectorOffsets;
 
-  typedef llvm::MapVector<MacroInfo *, MacroUpdate> MacroUpdatesMap;
-
-  /// \brief Updates to macro definitions that were loaded from an AST file.
-  MacroUpdatesMap MacroUpdates;
-
   /// \brief Mapping from macro definitions (as they occur in the preprocessing
   /// record) to the macro IDs.
   llvm::DenseMap<const MacroDefinition *, serialization::PreprocessedEntityID>
@@ -343,7 +349,7 @@ private:
                  
   /// \brief The set of declarations that may have redeclaration chains that
   /// need to be serialized.
-  llvm::SetVector<Decl *, llvm::SmallVector<Decl *, 4>, 
+  llvm::SetVector<Decl *, SmallVector<Decl *, 4>,
                   llvm::SmallPtrSet<Decl *, 4> > Redeclarations;
                                       
   /// \brief Statements that we've encountered while serializing a
@@ -415,7 +421,9 @@ private:
   void WriteBlockInfoBlock();
   void WriteControlBlock(Preprocessor &PP, ASTContext &Context,
                          StringRef isysroot, const std::string &OutputFile);
-  void WriteInputFiles(SourceManager &SourceMgr, StringRef isysroot);
+  void WriteInputFiles(SourceManager &SourceMgr,
+                       HeaderSearchOptions &HSOpts,
+                       StringRef isysroot);
   void WriteSourceManagerBlock(SourceManager &SourceMgr,
                                const Preprocessor &PP,
                                StringRef isysroot);
@@ -424,7 +432,8 @@ private:
   void WritePreprocessorDetail(PreprocessingRecord &PPRec);
   void WriteSubmodules(Module *WritingModule);
                                         
-  void WritePragmaDiagnosticMappings(const DiagnosticsEngine &Diag);
+  void WritePragmaDiagnosticMappings(const DiagnosticsEngine &Diag,
+                                     bool isModule);
   void WriteCXXBaseSpecifiersOffsets();
   void WriteType(QualType T);
   uint64_t WriteDeclContextLexicalBlock(ASTContext &Context, DeclContext *DC);
@@ -437,7 +446,6 @@ private:
   void WriteIdentifierTable(Preprocessor &PP, IdentifierResolver &IdResolver,
                             bool IsModule);
   void WriteAttributes(ArrayRef<const Attr*> Attrs, RecordDataImpl &Record);
-  void WriteMacroUpdates();
   void ResolveDeclUpdatesBlocks();
   void WriteDeclUpdatesBlocks();
   void WriteDeclReplacementsBlock();
@@ -508,9 +516,6 @@ public:
   /// \brief Emit a reference to an identifier.
   void AddIdentifierRef(const IdentifierInfo *II, RecordDataImpl &Record);
 
-  /// \brief Emit a reference to a macro.
-  void addMacroRef(MacroInfo *MI, RecordDataImpl &Record);
-
   /// \brief Emit a Selector (which is a smart pointer reference).
   void AddSelectorRef(Selector, RecordDataImpl &Record);
 
@@ -529,7 +534,12 @@ public:
   serialization::IdentID getIdentifierRef(const IdentifierInfo *II);
 
   /// \brief Get the unique number used to refer to the given macro.
-  serialization::MacroID getMacroRef(MacroInfo *MI);
+  serialization::MacroID getMacroRef(MacroInfo *MI, const IdentifierInfo *Name);
+
+  /// \brief Determine the ID of an already-emitted macro.
+  serialization::MacroID getMacroID(MacroInfo *MI);
+
+  uint64_t getMacroDirectivesOffset(const IdentifierInfo *Name);
 
   /// \brief Emit a reference to a type.
   void AddTypeRef(QualType T, RecordDataImpl &Record);
@@ -603,7 +613,7 @@ public:
                                 RecordDataImpl &Record);
 
   /// \brief Emit a UnresolvedSet structure.
-  void AddUnresolvedSet(const UnresolvedSetImpl &Set, RecordDataImpl &Record);
+  void AddUnresolvedSet(const ASTUnresolvedSet &Set, RecordDataImpl &Record);
 
   /// \brief Emit a C++ base specifier.
   void AddCXXBaseSpecifier(const CXXBaseSpecifier &Base,
@@ -640,6 +650,10 @@ public:
   /// source location.
   serialization::SubmoduleID inferSubmoduleIDFromLocation(SourceLocation Loc);
 
+  /// \brief Retrieve a submodule ID for this module.
+  /// Returns 0 If no ID has been associated with the module.
+  unsigned getExistingSubmoduleID(Module *Mod) const;
+
   /// \brief Note that the identifier II occurs at the given offset
   /// within the identifier table.
   void SetIdentifierOffset(const IdentifierInfo *II, uint32_t Offset);
@@ -699,9 +713,6 @@ public:
                            MacroDefinition *MD);
   void ModuleRead(serialization::SubmoduleID ID, Module *Mod);
 
-  // PPMutationListener implementation.
-  virtual void UndefinedMacro(MacroInfo *MI);
-
   // ASTMutationListener implementation.
   virtual void CompletedTagDefinition(const TagDecl *D);
   virtual void AddedVisibleDecl(const DeclContext *DC, const Decl *D);
@@ -728,7 +739,7 @@ class PCHGenerator : public SemaConsumer {
   std::string isysroot;
   raw_ostream *Out;
   Sema *SemaPtr;
-  llvm::SmallVector<char, 128> Buffer;
+  SmallVector<char, 128> Buffer;
   llvm::BitstreamWriter Stream;
   ASTWriter Writer;
 
@@ -743,7 +754,6 @@ public:
   ~PCHGenerator();
   virtual void InitializeSema(Sema &S) { SemaPtr = &S; }
   virtual void HandleTranslationUnit(ASTContext &Ctx);
-  virtual PPMutationListener *GetPPMutationListener();
   virtual ASTMutationListener *GetASTMutationListener();
   virtual ASTDeserializationListener *GetASTDeserializationListener();
 };
diff --git a/include/clang/Serialization/ContinuousRangeMap.h b/include/clang/Serialization/ContinuousRangeMap.h
index d89cd02..f8ef8a1 100644
--- a/include/clang/Serialization/ContinuousRangeMap.h
+++ b/include/clang/Serialization/ContinuousRangeMap.h
@@ -15,6 +15,7 @@
 #ifndef LLVM_CLANG_SERIALIZATION_CONTINUOUS_RANGE_MAP_H
 #define LLVM_CLANG_SERIALIZATION_CONTINUOUS_RANGE_MAP_H
 
+#include "clang/Basic/LLVM.h"
 #include "llvm/ADT/SmallVector.h"
 #include <algorithm>
 #include <utility>
diff --git a/include/clang/Serialization/GlobalModuleIndex.h b/include/clang/Serialization/GlobalModuleIndex.h
new file mode 100644
index 0000000..eaf26d1
--- /dev/null
+++ b/include/clang/Serialization/GlobalModuleIndex.h
@@ -0,0 +1,194 @@
+//===--- GlobalModuleIndex.h - Global Module Index --------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the GlobalModuleIndex class, which manages a global index
+// containing all of the identifiers known to the various modules within a given
+// subdirectory of the module cache. It is used to improve the performance of
+// queries such as "do any modules know about this identifier?"
+//
+//===----------------------------------------------------------------------===//
+#ifndef LLVM_CLANG_SERIALIZATION_GLOBAL_MODULE_INDEX_H
+#define LLVM_CLANG_SERIALIZATION_GLOBAL_MODULE_INDEX_H
+
+#include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
+#include <utility>
+
+namespace llvm {
+class BitstreamCursor;
+class MemoryBuffer;
+}
+
+namespace clang {
+
+class DirectoryEntry;
+class FileEntry;
+class FileManager;
+
+namespace serialization {
+  class ModuleFile;
+}
+
+using llvm::SmallVector;
+using llvm::SmallVectorImpl;
+using llvm::StringRef;
+using serialization::ModuleFile;
+
+/// \brief A global index for a set of module files, providing information about
+/// the identifiers within those module files.
+///
+/// The global index is an aid for name lookup into modules, offering a central
+/// place where one can look for identifiers determine which
+/// module files contain any information about that identifier. This
+/// allows the client to restrict the search to only those module files known
+/// to have a information about that identifier, improving performance. Moreover,
+/// the global module index may know about module files that have not been
+/// imported, and can be queried to determine which modules the current
+/// translation could or should load to fix a problem.
+class GlobalModuleIndex {
+  /// \brief Buffer containing the index file, which is lazily accessed so long
+  /// as the global module index is live.
+  llvm::OwningPtr<llvm::MemoryBuffer> Buffer;
+
+  /// \brief The hash table.
+  ///
+  /// This pointer actually points to a IdentifierIndexTable object,
+  /// but that type is only accessible within the implementation of
+  /// GlobalModuleIndex.
+  void *IdentifierIndex;
+
+  /// \brief Information about a given module file.
+  struct ModuleInfo {
+    ModuleInfo() : File(), Size(), ModTime() { }
+
+    /// \brief The module file, once it has been resolved.
+    ModuleFile *File;
+
+    /// \brief The module file name.
+    std::string FileName;
+
+    /// \brief Size of the module file at the time the global index was built.
+    off_t Size;
+
+    /// \brief Modification time of the module file at the time the global
+    /// index was built.
+    time_t ModTime;
+
+    /// \brief The module IDs on which this module directly depends.
+    /// FIXME: We don't really need a vector here.
+    llvm::SmallVector<unsigned, 4> Dependencies;
+  };
+
+  /// \brief A mapping from module IDs to information about each module.
+  ///
+  /// This vector may have gaps, if module files have been removed or have
+  /// been updated since the index was built. A gap is indicated by an empty
+  /// file name.
+  llvm::SmallVector<ModuleInfo, 16> Modules;
+
+  /// \brief Lazily-populated mapping from module files to their
+  /// corresponding index into the \c Modules vector.
+  llvm::DenseMap<ModuleFile *, unsigned> ModulesByFile;
+
+  /// \brief The set of modules that have not yet been resolved.
+  ///
+  /// The string is just the name of the module itself, which maps to the
+  /// module ID.
+  llvm::StringMap<unsigned> UnresolvedModules;
+
+  /// \brief The number of identifier lookups we performed.
+  unsigned NumIdentifierLookups;
+
+  /// \brief The number of identifier lookup hits, where we recognize the
+  /// identifier.
+  unsigned NumIdentifierLookupHits;
+  
+  /// \brief Internal constructor. Use \c readIndex() to read an index.
+  explicit GlobalModuleIndex(llvm::MemoryBuffer *Buffer,
+                             llvm::BitstreamCursor Cursor);
+
+  GlobalModuleIndex(const GlobalModuleIndex &) LLVM_DELETED_FUNCTION;
+  GlobalModuleIndex &operator=(const GlobalModuleIndex &) LLVM_DELETED_FUNCTION;
+
+public:
+  ~GlobalModuleIndex();
+
+  /// \brief An error code returned when trying to read an index.
+  enum ErrorCode {
+    /// \brief No error occurred.
+    EC_None,
+    /// \brief No index was found.
+    EC_NotFound,
+    /// \brief Some other process is currently building the index; it is not
+    /// available yet.
+    EC_Building,
+    /// \brief There was an unspecified I/O error reading or writing the index.
+    EC_IOError
+  };
+
+  /// \brief Read a global index file for the given directory.
+  ///
+  /// \param Path The path to the specific module cache where the module files
+  /// for the intended configuration reside.
+  ///
+  /// \returns A pair containing the global module index (if it exists) and
+  /// the error code.
+  static std::pair<GlobalModuleIndex *, ErrorCode>
+  readIndex(StringRef Path);
+
+  /// \brief Retrieve the set of modules that have up-to-date indexes.
+  ///
+  /// \param ModuleFiles Will be populated with the set of module files that
+  /// have been indexed.
+  void getKnownModules(SmallVectorImpl<ModuleFile *> &ModuleFiles);
+
+  /// \brief Retrieve the set of module files on which the given module file
+  /// directly depends.
+  void getModuleDependencies(ModuleFile *File,
+                             SmallVectorImpl<ModuleFile *> &Dependencies);
+
+  /// \brief A set of module files in which we found a result.
+  typedef llvm::SmallPtrSet<ModuleFile *, 4> HitSet;
+  
+  /// \brief Look for all of the module files with information about the given
+  /// identifier, e.g., a global function, variable, or type with that name.
+  ///
+  /// \param Name The identifier to look for.
+  ///
+  /// \param Hits Will be populated with the set of module files that have
+  /// information about this name.
+  ///
+  /// \returns true if the identifier is known to the index, false otherwise.
+  bool lookupIdentifier(StringRef Name, HitSet &Hits);
+
+  /// \brief Note that the given module file has been loaded.
+  ///
+  /// \returns false if the global module index has information about this
+  /// module file, and true otherwise.
+  bool loadedModuleFile(ModuleFile *File);
+
+  /// \brief Print statistics to standard error.
+  void printStats();
+
+  /// \brief Write a global index into the given
+  ///
+  /// \param FileMgr The file manager to use to load module files.
+  ///
+  /// \param Path The path to the directory containing module files, into
+  /// which the global index will be written.
+  static ErrorCode writeIndex(FileManager &FileMgr, StringRef Path);
+};
+
+}
+
+#endif
diff --git a/include/clang/Serialization/Module.h b/include/clang/Serialization/Module.h
index 39fa3d9..89c604f 100644
--- a/include/clang/Serialization/Module.h
+++ b/include/clang/Serialization/Module.h
@@ -15,9 +15,9 @@
 #ifndef LLVM_CLANG_SERIALIZATION_MODULE_H
 #define LLVM_CLANG_SERIALIZATION_MODULE_H
 
+#include "clang/Basic/SourceLocation.h"
 #include "clang/Serialization/ASTBitCodes.h"
 #include "clang/Serialization/ContinuousRangeMap.h"
-#include "clang/Basic/SourceLocation.h"
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/SetVector.h"
 #include "llvm/Bitcode/BitstreamReader.h"
@@ -55,6 +55,35 @@ struct DeclContextInfo {
   unsigned NumLexicalDecls;
 };
 
+/// \brief The input file that has been loaded from this AST file, along with
+/// bools indicating whether this was an overridden buffer or if it was
+/// out-of-date.
+class InputFile {
+  enum {
+    Overridden = 1,
+    OutOfDate = 2
+  };
+  llvm::PointerIntPair<const FileEntry *, 2, unsigned> Val;
+
+public:
+  InputFile() {}
+  InputFile(const FileEntry *File,
+            bool isOverridden = false, bool isOutOfDate = false) {
+    assert(!(isOverridden && isOutOfDate) &&
+           "an overridden cannot be out-of-date");
+    unsigned intVal = 0;
+    if (isOverridden)
+      intVal = Overridden;
+    else if (isOutOfDate)
+      intVal = OutOfDate;
+    Val.setPointerAndInt(File, intVal);
+  }
+
+  const FileEntry *getFile() const { return Val.getPointer(); }
+  bool isOverridden() const { return Val.getInt() == Overridden; }
+  bool isOutOfDate() const { return Val.getInt() == OutOfDate; }
+};
+
 /// \brief Information about a module that has been loaded by the ASTReader.
 ///
 /// Each instance of the Module class corresponds to a single AST file, which
@@ -69,6 +98,9 @@ public:
 
   // === General information ===
 
+  /// \brief The index of this module in the list of modules.
+  unsigned Index;
+
   /// \brief The type of this module.
   ModuleKind Kind;
 
@@ -121,8 +153,15 @@ public:
   /// \brief The main bitstream cursor for the main block.
   llvm::BitstreamCursor Stream;
 
+  /// \brief The source location where the module was explicitly or implicitly
+  /// imported in the local translation unit.
+  ///
+  /// If module A depends on and imports module B, both modules will have the
+  /// same DirectImportLoc, but different ImportLoc (B's ImportLoc will be a
+  /// source location inside module A).
+  SourceLocation DirectImportLoc;
+
   /// \brief The source location where this module was first imported.
-  /// FIXME: This is not properly initialized yet.
   SourceLocation ImportLoc;
 
   /// \brief The first source location in this module.
@@ -135,10 +174,8 @@ public:
   /// \brief Offsets for all of the input file entries in the AST file.
   const uint32_t *InputFileOffsets;
 
-  /// \brief The input files that have been loaded from this AST file, along
-  /// with a bool indicating whether this was an overridden buffer.
-  std::vector<llvm::PointerIntPair<const FileEntry *, 1, bool> > 
-    InputFilesLoaded;
+  /// \brief The input files that have been loaded from this AST file.
+  std::vector<InputFile> InputFilesLoaded;
 
   // === Source Locations ===
 
@@ -252,10 +289,6 @@ public:
   /// the header files.
   void *HeaderFileInfoTable;
 
-  /// \brief Actual data for the list of framework names used in the header
-  /// search information.
-  const char *HeaderFileFrameworkStrings;
-
   // === Submodule information ===  
   /// \brief The number of submodules in this module.
   unsigned LocalNumSubmodules;
diff --git a/include/clang/Serialization/ModuleManager.h b/include/clang/Serialization/ModuleManager.h
index 6dcaa21..b2c4063 100644
--- a/include/clang/Serialization/ModuleManager.h
+++ b/include/clang/Serialization/ModuleManager.h
@@ -15,19 +15,22 @@
 #ifndef LLVM_CLANG_SERIALIZATION_MODULE_MANAGER_H
 #define LLVM_CLANG_SERIALIZATION_MODULE_MANAGER_H
 
-#include "clang/Serialization/Module.h"
 #include "clang/Basic/FileManager.h"
+#include "clang/Serialization/Module.h"
 #include "llvm/ADT/DenseMap.h"
 
 namespace clang { 
 
+class GlobalModuleIndex;
+class ModuleMap;
+
 namespace serialization {
-  
+
 /// \brief Manages the set of modules loaded by an AST reader.
 class ModuleManager {
   /// \brief The chain of AST files. The first entry is the one named by the
   /// user, the last one is the one that doesn't depend on anything further.
-  llvm::SmallVector<ModuleFile*, 2> Chain;
+  SmallVector<ModuleFile *, 2> Chain;
   
   /// \brief All loaded modules, indexed by name.
   llvm::DenseMap<const FileEntry *, ModuleFile *> Modules;
@@ -38,7 +41,60 @@ class ModuleManager {
   
   /// \brief A lookup of in-memory (virtual file) buffers
   llvm::DenseMap<const FileEntry *, llvm::MemoryBuffer *> InMemoryBuffers;
-  
+
+  /// \brief The visitation order.
+  SmallVector<ModuleFile *, 4> VisitOrder;
+      
+  /// \brief The list of module files that both we and the global module index
+  /// know about.
+  ///
+  /// Either the global index or the module manager may have modules that the
+  /// other does not know about, because the global index can be out-of-date
+  /// (in which case the module manager could have modules it does not) and
+  /// this particular translation unit might not have loaded all of the modules
+  /// known to the global index.
+  SmallVector<ModuleFile *, 4> ModulesInCommonWithGlobalIndex;
+
+  /// \brief The global module index, if one is attached.
+  ///
+  /// The global module index will actually be owned by the ASTReader; this is
+  /// just an non-owning pointer.
+  GlobalModuleIndex *GlobalIndex;
+
+  /// \brief State used by the "visit" operation to avoid malloc traffic in
+  /// calls to visit().
+  struct VisitState {
+    explicit VisitState(unsigned N)
+      : VisitNumber(N, 0), NextVisitNumber(1), NextState(0)
+    {
+      Stack.reserve(N);
+    }
+
+    ~VisitState() {
+      delete NextState;
+    }
+
+    /// \brief The stack used when marking the imports of a particular module
+    /// as not-to-be-visited.
+    SmallVector<ModuleFile *, 4> Stack;
+
+    /// \brief The visit number of each module file, which indicates when
+    /// this module file was last visited.
+    SmallVector<unsigned, 4> VisitNumber;
+
+    /// \brief The next visit number to use to mark visited module files.
+    unsigned NextVisitNumber;
+
+    /// \brief The next visit state.
+    VisitState *NextState;
+  };
+
+  /// \brief The first visit() state in the chain.
+  VisitState *FirstVisitState;
+
+  VisitState *allocateVisitState();
+  void returnVisitState(VisitState *State);
+
 public:
   typedef SmallVector<ModuleFile*, 2>::iterator ModuleIterator;
   typedef SmallVector<ModuleFile*, 2>::const_iterator ModuleConstIterator;
@@ -79,12 +135,28 @@ public:
   
   /// \brief Returns the module associated with the given name
   ModuleFile *lookup(StringRef Name);
-  
+
+  /// \brief Returns the module associated with the given module file.
+  ModuleFile *lookup(const FileEntry *File);
+
   /// \brief Returns the in-memory (virtual file) buffer with the given name
   llvm::MemoryBuffer *lookupBuffer(StringRef Name);
   
   /// \brief Number of modules loaded
   unsigned size() const { return Chain.size(); }
+
+  /// \brief The result of attempting to add a new module.
+  enum AddModuleResult {
+    /// \brief The module file had already been loaded.
+    AlreadyLoaded,
+    /// \brief The module file was just loaded in response to this call.
+    NewlyLoaded,
+    /// \brief The module file is missing.
+    Missing,
+    /// \brief The module file is out-of-date.
+    OutOfDate
+  };
+
   /// \brief Attempts to create a new module and add it to the list of known
   /// modules.
   ///
@@ -92,26 +164,48 @@ public:
   ///
   /// \param Type The kind of module being loaded.
   ///
+  /// \param ImportLoc The location at which the module is imported.
+  ///
   /// \param ImportedBy The module that is importing this module, or NULL if
   /// this module is imported directly by the user.
   ///
   /// \param Generation The generation in which this module was loaded.
   ///
+  /// \param ExpectedSize The expected size of the module file, used for
+  /// validation. This will be zero if unknown.
+  ///
+  /// \param ExpectedModTime The expected modification time of the module
+  /// file, used for validation. This will be zero if unknown.
+  ///
+  /// \param Module A pointer to the module file if the module was successfully
+  /// loaded.
+  ///
   /// \param ErrorStr Will be set to a non-empty string if any errors occurred
   /// while trying to load the module.
   ///
   /// \return A pointer to the module that corresponds to this file name,
-  /// and a boolean indicating whether the module was newly added.
-  std::pair<ModuleFile *, bool> 
-  addModule(StringRef FileName, ModuleKind Type, ModuleFile *ImportedBy,
-            unsigned Generation, std::string &ErrorStr);
+  /// and a value indicating whether the module was loaded.
+  AddModuleResult addModule(StringRef FileName, ModuleKind Type,
+                            SourceLocation ImportLoc,
+                            ModuleFile *ImportedBy, unsigned Generation,
+                            off_t ExpectedSize, time_t ExpectedModTime,
+                            ModuleFile *&Module,
+                            std::string &ErrorStr);
 
   /// \brief Remove the given set of modules.
-  void removeModules(ModuleIterator first, ModuleIterator last);
+  void removeModules(ModuleIterator first, ModuleIterator last,
+                     ModuleMap *modMap);
 
   /// \brief Add an in-memory buffer the list of known buffers
   void addInMemoryBuffer(StringRef FileName, llvm::MemoryBuffer *Buffer);
-  
+
+  /// \brief Set the global module index.
+  void setGlobalIndex(GlobalModuleIndex *Index);
+
+  /// \brief Notification from the AST reader that the given module file
+  /// has been "accepted", and will not (can not) be unloaded.
+  void moduleFileAccepted(ModuleFile *MF);
+
   /// \brief Visit each of the modules.
   ///
   /// This routine visits each of the modules, starting with the
@@ -130,7 +224,13 @@ public:
   ///
   /// \param UserData User data associated with the visitor object, which
   /// will be passed along to the visitor.
-  void visit(bool (*Visitor)(ModuleFile &M, void *UserData), void *UserData);
+  ///
+  /// \param ModuleFilesHit If non-NULL, contains the set of module files
+  /// that we know we need to visit because the global module index told us to.
+  /// Any module that is known to both the global module index and the module
+  /// manager that is *not* in this set can be skipped.
+  void visit(bool (*Visitor)(ModuleFile &M, void *UserData), void *UserData,
+             llvm::SmallPtrSet<ModuleFile *, 4> *ModuleFilesHit = 0);
   
   /// \brief Visit each of the modules with a depth-first traversal.
   ///
@@ -151,7 +251,29 @@ public:
   void visitDepthFirst(bool (*Visitor)(ModuleFile &M, bool Preorder, 
                                        void *UserData), 
                        void *UserData);
-  
+
+  /// \brief Attempt to resolve the given module file name to a file entry.
+  ///
+  /// \param FileName The name of the module file.
+  ///
+  /// \param ExpectedSize The size that the module file is expected to have.
+  /// If the actual size differs, the resolver should return \c true.
+  ///
+  /// \param ExpectedModTime The modification time that the module file is
+  /// expected to have. If the actual modification time differs, the resolver
+  /// should return \c true.
+  ///
+  /// \param File Will be set to the file if there is one, or null
+  /// otherwise.
+  ///
+  /// \returns True if a file exists but does not meet the size/
+  /// modification time criteria, false if the file is either available and
+  /// suitable, or is missing.
+  bool lookupModuleFile(StringRef FileName,
+                        off_t ExpectedSize,
+                        time_t ExpectedModTime,
+                        const FileEntry *&File);
+
   /// \brief View the graphviz representation of the module graph.
   void viewGraph();
 };
diff --git a/include/clang/StaticAnalyzer/Core/Analyses.def b/include/clang/StaticAnalyzer/Core/Analyses.def
index 01a6ffd..dc79450 100644
--- a/include/clang/StaticAnalyzer/Core/Analyses.def
+++ b/include/clang/StaticAnalyzer/Core/Analyses.def
@@ -41,22 +41,12 @@ ANALYSIS_PURGE(PurgeStmt,  "statement", "Purge symbols, bindings, and constraint
 ANALYSIS_PURGE(PurgeBlock, "block", "Purge symbols, bindings, and constraints before every basic block")
 ANALYSIS_PURGE(PurgeNone,  "none", "Do not purge symbols, bindings, or constraints")
 
-#ifndef ANALYSIS_IPA
-#define ANALYSIS_IPA(NAME, CMDFLAG, DESC)
-#endif
-
-ANALYSIS_IPA(None, "none", "Perform only intra-procedural analysis")
-ANALYSIS_IPA(BasicInlining, "basic-inlining", "Inline C functions and blocks when their definitions are available")
-ANALYSIS_IPA(Inlining, "inlining", "Inline callees when their definitions are available")
-ANALYSIS_IPA(DynamicDispatch, "dynamic", "Experimental: Enable inlining of dynamically dispatched methods")
-ANALYSIS_IPA(DynamicDispatchBifurcate, "dynamic-bifurcate", "Experimental: Enable inlining of dynamically dispatched methods, bifurcate paths when exact type info is unavailable")
-
 #ifndef ANALYSIS_INLINING_MODE
 #define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC)
 #endif
 
-ANALYSIS_INLINING_MODE(All,  "all", "Analyze all functions in the order defined in the TU")
-ANALYSIS_INLINING_MODE(NoRedundancy, "noredundancy", "Do not analyze a function which has been previously inlined, use call graph to order")
+ANALYSIS_INLINING_MODE(All,  "all", "Analyze all functions as top level")
+ANALYSIS_INLINING_MODE(NoRedundancy, "noredundancy", "Do not analyze a function which has been previously inlined")
 
 #undef ANALYSIS_STORE
 #undef ANALYSIS_CONSTRAINTS
diff --git a/include/clang/StaticAnalyzer/Core/AnalyzerOptions.h b/include/clang/StaticAnalyzer/Core/AnalyzerOptions.h
index fa0754a..6dbdbbf 100644
--- a/include/clang/StaticAnalyzer/Core/AnalyzerOptions.h
+++ b/include/clang/StaticAnalyzer/Core/AnalyzerOptions.h
@@ -15,12 +15,12 @@
 #ifndef LLVM_CLANG_ANALYZEROPTIONS_H
 #define LLVM_CLANG_ANALYZEROPTIONS_H
 
-#include <string>
-#include <vector>
 #include "clang/Basic/LLVM.h"
-#include "llvm/ADT/Optional.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include "llvm/ADT/Optional.h"
 #include "llvm/ADT/StringMap.h"
+#include <string>
+#include <vector>
 
 namespace clang {
 class ASTConsumer;
@@ -64,13 +64,6 @@ enum AnalysisPurgeMode {
 NumPurgeModes
 };
 
-/// AnalysisIPAMode - Set of inter-procedural modes.
-enum AnalysisIPAMode {
-#define ANALYSIS_IPA(NAME, CMDFLAG, DESC) NAME,
-#include "clang/StaticAnalyzer/Core/Analyses.def"
-NumIPAModes
-};
-
 /// AnalysisInlineFunctionSelection - Set of inlining function selection heuristics.
 enum AnalysisInliningMode {
 #define ANALYSIS_INLINING_MODE(NAME, CMDFLAG, DESC) NAME,
@@ -102,8 +95,28 @@ enum CXXInlineableMemberKind {
   CIMK_Destructors
 };
 
+/// \brief Describes the different modes of inter-procedural analysis.
+enum IPAKind {
+  IPAK_NotSet = 0,
+
+  /// Perform only intra-procedural analysis.
+  IPAK_None = 1,
+
+  /// Inline C functions and blocks when their definitions are available.
+  IPAK_BasicInlining = 2,
 
-class AnalyzerOptions : public llvm::RefCountedBase<AnalyzerOptions> {
+  /// Inline callees(C, C++, ObjC) when their definitions are available.
+  IPAK_Inlining = 3,
+
+  /// Enable inlining of dynamically dispatched methods.
+  IPAK_DynamicDispatch = 4,
+
+  /// Enable inlining of dynamically dispatched methods, bifurcate paths when
+  /// exact type info is unavailable.
+  IPAK_DynamicDispatchBifurcate = 5
+};
+
+class AnalyzerOptions : public RefCountedBase<AnalyzerOptions> {
 public:
   typedef llvm::StringMap<std::string> ConfigTable;
 
@@ -117,14 +130,8 @@ public:
   AnalysisDiagClients AnalysisDiagOpt;
   AnalysisPurgeMode AnalysisPurgeOpt;
   
-  // \brief The interprocedural analysis mode.
-  AnalysisIPAMode IPAMode;
-  
   std::string AnalyzeSpecificFunction;
   
-  /// \brief The maximum number of exploded nodes the analyzer will generate.
-  unsigned MaxNodes;
-  
   /// \brief The maximum number of times the analyzer visits a block.
   unsigned maxBlockVisitOnPath;
   
@@ -159,39 +166,71 @@ public:
   unsigned InlineMaxStackDepth;
   
   /// \brief The mode of function selection used during inlining.
-  unsigned InlineMaxFunctionSize;
-
-  /// \brief The mode of function selection used during inlining.
   AnalysisInliningMode InliningMode;
 
 private:
+  /// \brief Describes the kinds for high-level analyzer mode.
+  enum UserModeKind {
+    UMK_NotSet = 0,
+    /// Perform shallow but fast analyzes.
+    UMK_Shallow = 1,
+    /// Perform deep analyzes.
+    UMK_Deep = 2
+  };
+
+  /// Controls the high-level analyzer mode, which influences the default 
+  /// settings for some of the lower-level config options (such as IPAMode).
+  /// \sa getUserMode
+  UserModeKind UserMode;
+
+  /// Controls the mode of inter-procedural analysis.
+  IPAKind IPAMode;
+
   /// Controls which C++ member functions will be considered for inlining.
   CXXInlineableMemberKind CXXMemberInliningMode;
   
   /// \sa includeTemporaryDtorsInCFG
-  llvm::Optional<bool> IncludeTemporaryDtorsInCFG;
+  Optional<bool> IncludeTemporaryDtorsInCFG;
   
   /// \sa mayInlineCXXStandardLibrary
-  llvm::Optional<bool> InlineCXXStandardLibrary;
+  Optional<bool> InlineCXXStandardLibrary;
   
   /// \sa mayInlineTemplateFunctions
-  llvm::Optional<bool> InlineTemplateFunctions;
+  Optional<bool> InlineTemplateFunctions;
+
+  /// \sa mayInlineCXXContainerCtorsAndDtors
+  Optional<bool> InlineCXXContainerCtorsAndDtors;
 
   /// \sa mayInlineObjCMethod
-  llvm::Optional<bool> ObjCInliningMode;
+  Optional<bool> ObjCInliningMode;
 
   // Cache of the "ipa-always-inline-size" setting.
   // \sa getAlwaysInlineSize
-  llvm::Optional<unsigned> AlwaysInlineSize;
+  Optional<unsigned> AlwaysInlineSize;
 
-  /// \sa shouldPruneNullReturnPaths
-  llvm::Optional<bool> PruneNullReturnPaths;
+  /// \sa shouldSuppressNullReturnPaths
+  Optional<bool> SuppressNullReturnPaths;
+
+  // \sa getMaxInlinableSize
+  Optional<unsigned> MaxInlinableSize;
 
   /// \sa shouldAvoidSuppressingNullArgumentPaths
-  llvm::Optional<bool> AvoidSuppressingNullArgumentPaths;
-  
+  Optional<bool> AvoidSuppressingNullArgumentPaths;
+
+  /// \sa shouldSuppressInlinedDefensiveChecks
+  Optional<bool> SuppressInlinedDefensiveChecks;
+
+  /// \sa shouldSuppressFromCXXStandardLibrary
+  Optional<bool> SuppressFromCXXStandardLibrary;
+
   /// \sa getGraphTrimInterval
-  llvm::Optional<unsigned> GraphTrimInterval;
+  Optional<unsigned> GraphTrimInterval;
+
+  /// \sa getMaxTimesInlineLarge
+  Optional<unsigned> MaxTimesInlineLarge;
+
+  /// \sa getMaxNodesPerTopLevelFunction
+  Optional<unsigned> MaxNodesPerTopLevelFunction;
 
   /// Interprets an option's string value as a boolean.
   ///
@@ -200,13 +239,20 @@ private:
   bool getBooleanOption(StringRef Name, bool DefaultVal);
 
   /// Variant that accepts a Optional value to cache the result.
-  bool getBooleanOption(llvm::Optional<bool> &V, StringRef Name,
-                        bool DefaultVal);
-  
+  bool getBooleanOption(Optional<bool> &V, StringRef Name, bool DefaultVal);
+
   /// Interprets an option's string value as an integer value.
-  int getOptionAsInteger(llvm::StringRef Name, int DefaultVal);
+  int getOptionAsInteger(StringRef Name, int DefaultVal);
 
 public:
+  /// \brief Retrieves and sets the UserMode. This is a high-level option,
+  /// which is used to set other low-level options. It is not accessible
+  /// outside of AnalyzerOptions.
+  UserModeKind getUserMode();
+
+  /// \brief Returns the inter-procedural analysis mode.
+  IPAKind getIPAMode();
+
   /// Returns the option controlling which C++ member functions will be
   /// considered for inlining.
   ///
@@ -238,6 +284,13 @@ public:
   /// accepts the values "true" and "false".
   bool mayInlineTemplateFunctions();
 
+  /// Returns whether or not constructors and destructors of C++ container
+  /// objects may be considered for inlining.
+  ///
+  /// This is controlled by the 'c++-container-inlining' config option, which
+  /// accepts the values "true" and "false".
+  bool mayInlineCXXContainerCtorsAndDtors();
+
   /// Returns whether or not paths that go through null returns should be
   /// suppressed.
   ///
@@ -246,12 +299,12 @@ public:
   ///
   /// This is controlled by the 'suppress-null-return-paths' config option,
   /// which accepts the values "true" and "false".
-  bool shouldPruneNullReturnPaths();
+  bool shouldSuppressNullReturnPaths();
 
   /// Returns whether a bug report should \em not be suppressed if its path
   /// includes a call with a null argument, even if that call has a null return.
   ///
-  /// This option has no effect when #shouldPruneNullReturnPaths() is false.
+  /// This option has no effect when #shouldSuppressNullReturnPaths() is false.
   ///
   /// This is a counter-heuristic to avoid false negatives.
   ///
@@ -259,12 +312,43 @@ public:
   /// option, which accepts the values "true" and "false".
   bool shouldAvoidSuppressingNullArgumentPaths();
 
+  /// Returns whether or not diagnostics containing inlined defensive NULL
+  /// checks should be suppressed.
+  ///
+  /// This is controlled by the 'suppress-inlined-defensive-checks' config
+  /// option, which accepts the values "true" and "false".
+  bool shouldSuppressInlinedDefensiveChecks();
+
+  /// Returns whether or not diagnostics reported within the C++ standard
+  /// library should be suppressed.
+  ///
+  /// This is controlled by the 'suppress-c++-stdlib' config option,
+  /// which accepts the values "true" and "false".
+  bool shouldSuppressFromCXXStandardLibrary();
+
+  /// Returns whether irrelevant parts of a bug report path should be pruned
+  /// out of the final output.
+  ///
+  /// This is controlled by the 'prune-paths' config option, which accepts the
+  /// values "true" and "false".
+  bool shouldPrunePaths();
+
+  /// Returns true if 'static' initializers should be in conditional logic
+  /// in the CFG.
+  bool shouldConditionalizeStaticInitializers();
+
   // Returns the size of the functions (in basic blocks), which should be
   // considered to be small enough to always inline.
   //
   // This is controlled by "ipa-always-inline-size" analyzer-config option.
   unsigned getAlwaysInlineSize();
-  
+
+  // Returns the bound on the number of basic blocks in an inlined function
+  // (50 by default).
+  //
+  // This is controlled by "-analyzer-config max-inlinable-size" option.
+  unsigned getMaxInlinableSize();
+
   /// Returns true if the analyzer engine should synthesize fake bodies
   /// for well-known functions.
   bool shouldSynthesizeBodies();
@@ -276,32 +360,45 @@ public:
   /// node reclamation, set the option to "0".
   unsigned getGraphTrimInterval();
 
+  /// Returns the maximum times a large function could be inlined.
+  ///
+  /// This is controlled by the 'max-times-inline-large' config option.
+  unsigned getMaxTimesInlineLarge();
+
+  /// Returns the maximum number of nodes the analyzer can generate while
+  /// exploring a top level function (for each exploded graph).
+  /// 150000 is default; 0 means no limit.
+  ///
+  /// This is controlled by the 'max-nodes' config option.
+  unsigned getMaxNodesPerTopLevelFunction();
+
 public:
-  AnalyzerOptions() : CXXMemberInliningMode() {
-    AnalysisStoreOpt = RegionStoreModel;
-    AnalysisConstraintsOpt = RangeConstraintsModel;
-    AnalysisDiagOpt = PD_HTML;
-    AnalysisPurgeOpt = PurgeStmt;
-    IPAMode = DynamicDispatchBifurcate;
-    ShowCheckerHelp = 0;
-    AnalyzeAll = 0;
-    AnalyzerDisplayProgress = 0;
-    AnalyzeNestedBlocks = 0;
-    eagerlyAssumeBinOpBifurcation = 0;
-    TrimGraph = 0;
-    visualizeExplodedGraphWithGraphViz = 0;
-    visualizeExplodedGraphWithUbiGraph = 0;
-    UnoptimizedCFG = 0;
-    PrintStats = 0;
-    NoRetryExhausted = 0;
+  AnalyzerOptions() :
+    AnalysisStoreOpt(RegionStoreModel),
+    AnalysisConstraintsOpt(RangeConstraintsModel),
+    AnalysisDiagOpt(PD_HTML),
+    AnalysisPurgeOpt(PurgeStmt),
+    ShowCheckerHelp(0),
+    AnalyzeAll(0),
+    AnalyzerDisplayProgress(0),
+    AnalyzeNestedBlocks(0),
+    eagerlyAssumeBinOpBifurcation(0),
+    TrimGraph(0),
+    visualizeExplodedGraphWithGraphViz(0),
+    visualizeExplodedGraphWithUbiGraph(0),
+    UnoptimizedCFG(0),
+    PrintStats(0),
+    NoRetryExhausted(0),
     // Cap the stack depth at 4 calls (5 stack frames, base + 4 calls).
-    InlineMaxStackDepth = 5;
-    InlineMaxFunctionSize = 200;
-    InliningMode = NoRedundancy;
-  }
+    InlineMaxStackDepth(5),
+    InliningMode(NoRedundancy),
+    UserMode(UMK_NotSet),
+    IPAMode(IPAK_NotSet),
+    CXXMemberInliningMode() {}
+
 };
   
-typedef llvm::IntrusiveRefCntPtr<AnalyzerOptions> AnalyzerOptionsRef;
+typedef IntrusiveRefCntPtr<AnalyzerOptions> AnalyzerOptionsRef;
   
 }
 
diff --git a/include/clang/StaticAnalyzer/Core/BugReporter/BugReporter.h b/include/clang/StaticAnalyzer/Core/BugReporter/BugReporter.h
index b5a88ba..7a87e47 100644
--- a/include/clang/StaticAnalyzer/Core/BugReporter/BugReporter.h
+++ b/include/clang/StaticAnalyzer/Core/BugReporter/BugReporter.h
@@ -19,12 +19,12 @@
 #include "clang/StaticAnalyzer/Core/BugReporter/BugReporterVisitor.h"
 #include "clang/StaticAnalyzer/Core/BugReporter/PathDiagnostic.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h"
+#include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/FoldingSet.h"
-#include "llvm/ADT/ilist.h"
-#include "llvm/ADT/ilist_node.h"
 #include "llvm/ADT/ImmutableSet.h"
-#include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/SmallSet.h"
+#include "llvm/ADT/ilist.h"
+#include "llvm/ADT/ilist_node.h"
 
 namespace clang {
 
@@ -75,6 +75,8 @@ protected:
   std::string Description;
   PathDiagnosticLocation Location;
   PathDiagnosticLocation UniqueingLocation;
+  const Decl *UniqueingDecl;
+  
   const ExplodedNode *ErrorNode;
   SmallVector<SourceRange, 4> Ranges;
   ExtraTextList ExtraText;
@@ -87,14 +89,14 @@ protected:
   /// diagnostics to include when constructing the final path diagnostic.
   /// The stack is largely used by BugReporter when generating PathDiagnostics
   /// for multiple PathDiagnosticConsumers.
-  llvm::SmallVector<Symbols *, 2> interestingSymbols;
+  SmallVector<Symbols *, 2> interestingSymbols;
 
   /// A (stack of) set of regions that are registered with this report as being
   /// "interesting", and thus used to help decide which diagnostics
   /// to include when constructing the final path diagnostic.
   /// The stack is largely used by BugReporter when generating PathDiagnostics
   /// for multiple PathDiagnosticConsumers.
-  llvm::SmallVector<Regions *, 2> interestingRegions;
+  SmallVector<Regions *, 2> interestingRegions;
 
   /// A set of location contexts that correspoind to call sites which should be
   /// considered "interesting".
@@ -162,9 +164,10 @@ public:
   /// for uniquing reports. For example, memory leaks checker, could set this to
   /// the allocation site, rather then the location where the bug is reported.
   BugReport(BugType& bt, StringRef desc, const ExplodedNode *errornode,
-            PathDiagnosticLocation LocationToUnique)
+            PathDiagnosticLocation LocationToUnique, const Decl *DeclToUnique)
     : BT(bt), DeclWithIssue(0), Description(desc),
       UniqueingLocation(LocationToUnique),
+      UniqueingDecl(DeclToUnique),
       ErrorNode(errornode), ConfigurationChangeToken(0),
       DoNotPrunePath(false) {}
 
@@ -260,6 +263,16 @@ public:
   ///  This location is used by clients rendering diagnostics.
   virtual PathDiagnosticLocation getLocation(const SourceManager &SM) const;
 
+  /// \brief Get the location on which the report should be uniqued.
+  PathDiagnosticLocation getUniqueingLocation() const {
+    return UniqueingLocation;
+  }
+  
+  /// \brief Get the declaration containing the uniqueing location.
+  const Decl *getUniqueingDecl() const {
+    return UniqueingDecl;
+  }
+
   const Stmt *getStmt() const;
 
   /// \brief Add a range to a bug report.
@@ -440,8 +453,7 @@ public:
     return true;
   }
 
-  bool RemoveUneededCalls(PathPieces &pieces, BugReport *R,
-                          PathDiagnosticCallPiece *CallWithLoc = 0);
+  bool RemoveUnneededCalls(PathPieces &pieces, BugReport *R);
 
   void Register(BugType *BT);
 
diff --git a/include/clang/StaticAnalyzer/Core/BugReporter/BugReporterVisitor.h b/include/clang/StaticAnalyzer/Core/BugReporter/BugReporterVisitor.h
index 78e35ca..2e5f207 100644
--- a/include/clang/StaticAnalyzer/Core/BugReporter/BugReporterVisitor.h
+++ b/include/clang/StaticAnalyzer/Core/BugReporter/BugReporterVisitor.h
@@ -55,8 +55,8 @@ public:
   ///
   /// The last parameter can be used to register a new visitor with the given
   /// BugReport while processing a node.
-  virtual PathDiagnosticPiece *VisitNode(const ExplodedNode *N,
-                                         const ExplodedNode *PrevN,
+  virtual PathDiagnosticPiece *VisitNode(const ExplodedNode *Succ,
+                                         const ExplodedNode *Pred,
                                          BugReporterContext &BRC,
                                          BugReport &BR) = 0;
 
@@ -99,26 +99,24 @@ class FindLastStoreBRVisitor
 {
   const MemRegion *R;
   SVal V;
-  bool satisfied;
+  bool Satisfied;
 
-public:
-  /// \brief Convenience method to create a visitor given only the MemRegion.
-  /// Returns NULL if the visitor cannot be created. For example, when the
-  /// corresponding value is unknown.
-  static BugReporterVisitor *createVisitorObject(const ExplodedNode *N,
-                                                 const MemRegion *R);
+  /// If the visitor is tracking the value directly responsible for the
+  /// bug, we are going to employ false positive suppression.
+  bool EnableNullFPSuppression;
 
+public:
   /// Creates a visitor for every VarDecl inside a Stmt and registers it with
   /// the BugReport.
-  static void registerStatementVarDecls(BugReport &BR, const Stmt *S);
+  static void registerStatementVarDecls(BugReport &BR, const Stmt *S,
+                                        bool EnableNullFPSuppression);
 
-  FindLastStoreBRVisitor(SVal v, const MemRegion *r)
-  : R(r), V(v), satisfied(false) {
-    assert (!V.isUnknown() && "Cannot track unknown value.");
-
-    // TODO: Does it make sense to allow undef values here?
-    // (If not, also see UndefCapturedBlockVarChecker)?
-  }
+  FindLastStoreBRVisitor(KnownSVal V, const MemRegion *R,
+                         bool InEnableNullFPSuppression)
+  : R(R),
+    V(V),
+    Satisfied(false),
+    EnableNullFPSuppression(InEnableNullFPSuppression) {}
 
   void Profile(llvm::FoldingSetNodeID &ID) const;
 
@@ -132,12 +130,14 @@ class TrackConstraintBRVisitor
   : public BugReporterVisitorImpl<TrackConstraintBRVisitor>
 {
   DefinedSVal Constraint;
-  const bool Assumption;
-  bool isSatisfied;
+  bool Assumption;
+  bool IsSatisfied;
+  bool IsZeroCheck;
 
 public:
   TrackConstraintBRVisitor(DefinedSVal constraint, bool assumption)
-  : Constraint(constraint), Assumption(assumption), isSatisfied(false) {}
+  : Constraint(constraint), Assumption(assumption), IsSatisfied(false),
+    IsZeroCheck(!Assumption && Constraint.getAs<Loc>()) {}
 
   void Profile(llvm::FoldingSetNodeID &ID) const;
 
@@ -149,12 +149,19 @@ public:
                                  const ExplodedNode *PrevN,
                                  BugReporterContext &BRC,
                                  BugReport &BR);
+
+private:
+  /// Checks if the constraint is valid in the current state.
+  bool isUnderconstrained(const ExplodedNode *N) const;
+
 };
 
+/// \class NilReceiverBRVisitor
+/// \brief Prints path notes when a message is sent to a nil receiver.
 class NilReceiverBRVisitor
-  : public BugReporterVisitorImpl<NilReceiverBRVisitor>
-{
+  : public BugReporterVisitorImpl<NilReceiverBRVisitor> {
 public:
+  
   void Profile(llvm::FoldingSetNodeID &ID) const {
     static int x = 0;
     ID.AddPointer(&x);
@@ -164,6 +171,10 @@ public:
                                  const ExplodedNode *PrevN,
                                  BugReporterContext &BRC,
                                  BugReport &BR);
+
+  /// If the statement is a message send expression with nil receiver, returns
+  /// the receiver expression. Returns NULL otherwise.
+  static const Expr *getNilReceiver(const Stmt *S, const ExplodedNode *N);
 };
 
 /// Visitor that tries to report interesting diagnostics from conditions.
@@ -223,11 +234,38 @@ public:
                                               const ExplodedNode *N);
 
   bool patternMatch(const Expr *Ex,
-                    llvm::raw_ostream &Out,
+                    raw_ostream &Out,
                     BugReporterContext &BRC,
                     BugReport &R,
                     const ExplodedNode *N,
-                    llvm::Optional<bool> &prunable);
+                    Optional<bool> &prunable);
+};
+
+/// \brief Suppress reports that might lead to known false positives.
+///
+/// Currently this suppresses reports based on locations of bugs.
+class LikelyFalsePositiveSuppressionBRVisitor
+  : public BugReporterVisitorImpl<LikelyFalsePositiveSuppressionBRVisitor> {
+public:
+  static void *getTag() {
+    static int Tag = 0;
+    return static_cast<void *>(&Tag);
+  }
+
+  void Profile(llvm::FoldingSetNodeID &ID) const {
+    ID.AddPointer(getTag());
+  }
+
+  virtual PathDiagnosticPiece *VisitNode(const ExplodedNode *N,
+                                         const ExplodedNode *Prev,
+                                         BugReporterContext &BRC,
+                                         BugReport &BR) {
+    return 0;
+  }
+
+  virtual PathDiagnosticPiece *getEndPath(BugReporterContext &BRC,
+                                          const ExplodedNode *N,
+                                          BugReport &BR);
 };
 
 /// \brief When a region containing undefined value or '0' value is passed 
@@ -256,6 +294,38 @@ public:
                                  BugReport &BR);
 };
 
+class SuppressInlineDefensiveChecksVisitor
+: public BugReporterVisitorImpl<SuppressInlineDefensiveChecksVisitor>
+{
+  /// The symbolic value for which we are tracking constraints.
+  /// This value is constrained to null in the end of path.
+  DefinedSVal V;
+
+  /// Track if we found the node where the constraint was first added.
+  bool IsSatisfied;
+
+  /// Since the visitors can be registered on nodes previous to the last
+  /// node in the BugReport, but the path traversal always starts with the last
+  /// node, the visitor invariant (that we start with a node in which V is null)
+  /// might not hold when node visitation starts. We are going to start tracking
+  /// from the last node in which the value is null.
+  bool IsTrackingTurnedOn;
+
+public:
+  SuppressInlineDefensiveChecksVisitor(DefinedSVal Val, const ExplodedNode *N);
+
+  void Profile(llvm::FoldingSetNodeID &ID) const;
+
+  /// Return the tag associated with this visitor.  This tag will be used
+  /// to make all PathDiagnosticPieces created by this visitor.
+  static const char *getTag();
+
+  PathDiagnosticPiece *VisitNode(const ExplodedNode *Succ,
+                                 const ExplodedNode *Pred,
+                                 BugReporterContext &BRC,
+                                 BugReport &BR);
+};
+
 namespace bugreporter {
 
 /// Attempts to add visitors to trace a null or undefined value back to its
@@ -268,14 +338,17 @@ namespace bugreporter {
 /// \param IsArg Whether the statement is an argument to an inlined function.
 ///              If this is the case, \p N \em must be the CallEnter node for
 ///              the function.
+/// \param EnableNullFPSuppression Whether we should employ false positive
+///         suppression (inlined defensive checks, returned null).
 ///
 /// \return Whether or not the function was able to add visitors for this
 ///         statement. Note that returning \c true does not actually imply
 ///         that any visitors were added.
 bool trackNullOrUndefValue(const ExplodedNode *N, const Stmt *S, BugReport &R,
-                           bool IsArg = false);
+                           bool IsArg = false,
+                           bool EnableNullFPSuppression = true);
 
-const Stmt *GetDerefExpr(const ExplodedNode *N);
+const Expr *getDerefExpr(const Stmt *S);
 const Stmt *GetDenomExpr(const ExplodedNode *N);
 const Stmt *GetRetValExpr(const ExplodedNode *N);
 bool isDeclRefExprToReference(const Expr *E);
diff --git a/include/clang/StaticAnalyzer/Core/BugReporter/BugType.h b/include/clang/StaticAnalyzer/Core/BugReporter/BugType.h
index cb49122..644aa31 100644
--- a/include/clang/StaticAnalyzer/Core/BugReporter/BugType.h
+++ b/include/clang/StaticAnalyzer/Core/BugReporter/BugType.h
@@ -14,6 +14,7 @@
 #ifndef LLVM_CLANG_ANALYSIS_BUGTYPE
 #define LLVM_CLANG_ANALYSIS_BUGTYPE
 
+#include "clang/Basic/LLVM.h"
 #include "llvm/ADT/FoldingSet.h"
 #include <string>
 
diff --git a/include/clang/StaticAnalyzer/Core/BugReporter/PathDiagnostic.h b/include/clang/StaticAnalyzer/Core/BugReporter/PathDiagnostic.h
index 6dc26e6..3f0a1b1 100644
--- a/include/clang/StaticAnalyzer/Core/BugReporter/PathDiagnostic.h
+++ b/include/clang/StaticAnalyzer/Core/BugReporter/PathDiagnostic.h
@@ -14,12 +14,12 @@
 #ifndef LLVM_CLANG_PATH_DIAGNOSTIC_H
 #define LLVM_CLANG_PATH_DIAGNOSTIC_H
 
-#include "clang/Basic/SourceLocation.h"
 #include "clang/Analysis/ProgramPoint.h"
+#include "clang/Basic/SourceLocation.h"
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/IntrusiveRefCntPtr.h"
-#include "llvm/ADT/PointerUnion.h"
 #include "llvm/ADT/Optional.h"
+#include "llvm/ADT/PointerUnion.h"
 #include <deque>
 #include <iterator>
 #include <string>
@@ -341,7 +341,7 @@ protected:
 public:
   virtual ~PathDiagnosticPiece();
 
-  llvm::StringRef getString() const { return str; }
+  StringRef getString() const { return str; }
 
   /// Tag this PathDiagnosticPiece with the given C-string.
   void setTag(const char *tag) { Tag = tag; }
@@ -461,13 +461,13 @@ public:
 };
 
 class PathDiagnosticEventPiece : public PathDiagnosticSpotPiece {
-  llvm::Optional<bool> IsPrunable;
+  Optional<bool> IsPrunable;
 
   /// If the event occurs in a different frame than the final diagnostic,
   /// supply a message that will be used to construct an extra hint on the
   /// returns from all the calls on the stack from this event to the final
   /// diagnostic.
-  llvm::OwningPtr<StackHintGenerator> CallStackHint;
+  OwningPtr<StackHintGenerator> CallStackHint;
 
 public:
   PathDiagnosticEventPiece(const PathDiagnosticLocation &pos,
@@ -670,13 +670,19 @@ class PathDiagnostic : public llvm::FoldingSetNode {
   std::deque<std::string> OtherDesc;
   PathDiagnosticLocation Loc;
   PathPieces pathImpl;
-  llvm::SmallVector<PathPieces *, 3> pathStack;
+  SmallVector<PathPieces *, 3> pathStack;
   
-  PathDiagnostic(); // Do not implement.
+  /// \brief Important bug uniqueing location.
+  /// The location info is useful to differentiate between bugs.
+  PathDiagnosticLocation UniqueingLoc;
+  const Decl *UniqueingDecl;
+
+  PathDiagnostic() LLVM_DELETED_FUNCTION;
 public:
   PathDiagnostic(const Decl *DeclWithIssue, StringRef bugtype,
                  StringRef verboseDesc, StringRef shortDesc,
-                 StringRef category);
+                 StringRef category, PathDiagnosticLocation LocationToUnique,
+                 const Decl *DeclToUnique);
 
   ~PathDiagnostic();
   
@@ -738,6 +744,16 @@ public:
     return Loc;
   }
 
+  /// \brief Get the location on which the report should be uniqued.
+  PathDiagnosticLocation getUniqueingLoc() const {
+    return UniqueingLoc;
+  }
+
+  /// \brief Get the declaration containing the uniqueing location.
+  const Decl *getUniqueingDecl() const {
+    return UniqueingDecl;
+  }
+
   void flattenLocations() {
     Loc.flatten();
     for (PathPieces::iterator I = pathImpl.begin(), E = pathImpl.end(); 
diff --git a/include/clang/StaticAnalyzer/Core/Checker.h b/include/clang/StaticAnalyzer/Core/Checker.h
index 9eb1248..0dbaab0 100644
--- a/include/clang/StaticAnalyzer/Core/Checker.h
+++ b/include/clang/StaticAnalyzer/Core/Checker.h
@@ -34,11 +34,11 @@ class ASTDecl {
   template <typename CHECKER>
   static void _checkDecl(void *checker, const Decl *D, AnalysisManager& mgr,
                          BugReporter &BR) {
-    ((const CHECKER *)checker)->checkASTDecl(llvm::cast<DECL>(D), mgr, BR);
+    ((const CHECKER *)checker)->checkASTDecl(cast<DECL>(D), mgr, BR);
   }
 
   static bool _handlesDecl(const Decl *D) {
-    return llvm::isa<DECL>(D);
+    return isa<DECL>(D);
   }
 public:
   template <typename CHECKER>
@@ -86,11 +86,11 @@ template <typename STMT>
 class PreStmt {
   template <typename CHECKER>
   static void _checkStmt(void *checker, const Stmt *S, CheckerContext &C) {
-    ((const CHECKER *)checker)->checkPreStmt(llvm::cast<STMT>(S), C);
+    ((const CHECKER *)checker)->checkPreStmt(cast<STMT>(S), C);
   }
 
   static bool _handlesStmt(const Stmt *S) {
-    return llvm::isa<STMT>(S);
+    return isa<STMT>(S);
   }
 public:
   template <typename CHECKER>
@@ -105,11 +105,11 @@ template <typename STMT>
 class PostStmt {
   template <typename CHECKER>
   static void _checkStmt(void *checker, const Stmt *S, CheckerContext &C) {
-    ((const CHECKER *)checker)->checkPostStmt(llvm::cast<STMT>(S), C);
+    ((const CHECKER *)checker)->checkPostStmt(cast<STMT>(S), C);
   }
 
   static bool _handlesStmt(const Stmt *S) {
-    return llvm::isa<STMT>(S);
+    return isa<STMT>(S);
   }
 public:
   template <typename CHECKER>
@@ -227,18 +227,18 @@ public:
   }
 };
 
-class EndPath {
+class EndFunction {
   template <typename CHECKER>
-  static void _checkEndPath(void *checker,
-                            CheckerContext &C) {
-    ((const CHECKER *)checker)->checkEndPath(C);
+  static void _checkEndFunction(void *checker,
+                                CheckerContext &C) {
+    ((const CHECKER *)checker)->checkEndFunction(C);
   }
 
 public:
   template <typename CHECKER>
   static void _register(CHECKER *checker, CheckerManager &mgr) {
-    mgr._registerForEndPath(
-     CheckerManager::CheckEndPathFunc(checker, _checkEndPath<CHECKER>));
+    mgr._registerForEndFunction(
+     CheckerManager::CheckEndFunctionFunc(checker, _checkEndFunction<CHECKER>));
   }
 };
 
@@ -293,7 +293,7 @@ class RegionChanges {
   static ProgramStateRef 
   _checkRegionChanges(void *checker,
                       ProgramStateRef state,
-                      const StoreManager::InvalidatedSymbols *invalidated,
+                      const InvalidatedSymbols *invalidated,
                       ArrayRef<const MemRegion *> Explicits,
                       ArrayRef<const MemRegion *> Regions,
                       const CallEvent *Call) {
@@ -317,6 +317,59 @@ public:
   }
 };
 
+class PointerEscape {
+  template <typename CHECKER>
+  static ProgramStateRef
+  _checkPointerEscape(void *checker,
+                     ProgramStateRef State,
+                     const InvalidatedSymbols &Escaped,
+                     const CallEvent *Call,
+                     PointerEscapeKind Kind,
+                    bool IsConst) {
+    if (!IsConst)
+      return ((const CHECKER *)checker)->checkPointerEscape(State,
+                                                            Escaped,
+                                                            Call,
+                                                            Kind);
+    return State;
+  }
+
+public:
+  template <typename CHECKER>
+  static void _register(CHECKER *checker, CheckerManager &mgr) {
+    mgr._registerForPointerEscape(
+          CheckerManager::CheckPointerEscapeFunc(checker,
+                                                _checkPointerEscape<CHECKER>));
+  }
+};
+
+class ConstPointerEscape {
+  template <typename CHECKER>
+  static ProgramStateRef
+  _checkConstPointerEscape(void *checker,
+                      ProgramStateRef State,
+                      const InvalidatedSymbols &Escaped,
+                      const CallEvent *Call,
+                      PointerEscapeKind Kind,
+                      bool IsConst) {
+    if (IsConst)
+      return ((const CHECKER *)checker)->checkConstPointerEscape(State,
+                                                                 Escaped,
+                                                                 Call,
+                                                                 Kind);
+    return State;
+  }
+
+public:
+  template <typename CHECKER>
+  static void _register(CHECKER *checker, CheckerManager &mgr) {
+    mgr._registerForPointerEscape(
+      CheckerManager::CheckPointerEscapeFunc(checker,
+                                            _checkConstPointerEscape<CHECKER>));
+  }
+};
+
+  
 template <typename EVENT>
 class Event {
   template <typename CHECKER>
@@ -448,6 +501,14 @@ struct ImplicitNullDerefEvent {
   BugReporter *BR;
 };
 
+/// \brief A helper class which wraps a boolean value set to false by default.
+struct DefaultBool {
+  bool val;
+  DefaultBool() : val(false) {}
+  operator bool() const { return val; }
+  DefaultBool &operator=(bool b) { val = b; return *this; }
+};
+
 } // end ento namespace
 
 } // end clang namespace
diff --git a/include/clang/StaticAnalyzer/Core/CheckerManager.h b/include/clang/StaticAnalyzer/Core/CheckerManager.h
index 7ae8e53..6f99fc1 100644
--- a/include/clang/StaticAnalyzer/Core/CheckerManager.h
+++ b/include/clang/StaticAnalyzer/Core/CheckerManager.h
@@ -14,12 +14,12 @@
 #ifndef LLVM_CLANG_SA_CORE_CHECKERMANAGER_H
 #define LLVM_CLANG_SA_CORE_CHECKERMANAGER_H
 
+#include "clang/Analysis/ProgramPoint.h"
 #include "clang/Basic/LangOptions.h"
-#include "llvm/ADT/SmallVector.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/Store.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/FoldingSet.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/Store.h"
-#include "clang/Analysis/ProgramPoint.h"
+#include "llvm/ADT/SmallVector.h"
 #include <vector>
 
 namespace clang {
@@ -112,6 +112,26 @@ public:
   RET operator()() const { return Fn(Checker); } 
 };
 
+/// \brief Describes the different reasons a pointer escapes
+/// during analysis.
+enum PointerEscapeKind {
+  /// A pointer escapes due to binding its value to a location
+  /// that the analyzer cannot track.
+  PSK_EscapeOnBind,
+
+  /// The pointer has been passed to a function call directly.
+  PSK_DirectEscapeOnCall,
+
+  /// The pointer has been passed to a function indirectly.
+  /// For example, the pointer is accessible through an
+  /// argument to a function.
+  PSK_IndirectEscapeOnCall,
+
+  /// The reason for pointer escape is unknown. For example, 
+  /// a region containing this pointer is invalidated.
+  PSK_EscapeOther
+};
+
 class CheckerManager {
   const LangOptions LangOpts;
 
@@ -264,11 +284,11 @@ public:
   void runCheckersForEndAnalysis(ExplodedGraph &G, BugReporter &BR,
                                  ExprEngine &Eng);
 
-  /// \brief Run checkers for end of path.
-  void runCheckersForEndPath(NodeBuilderContext &BC,
-                             ExplodedNodeSet &Dst,
-                             ExplodedNode *Pred,
-                             ExprEngine &Eng);
+  /// \brief Run checkers on end of function.
+  void runCheckersForEndFunction(NodeBuilderContext &BC,
+                                 ExplodedNodeSet &Dst,
+                                 ExplodedNode *Pred,
+                                 ExprEngine &Eng);
 
   /// \brief Run checkers for branch condition.
   void runCheckersForBranchCondition(const Stmt *condition,
@@ -310,14 +330,34 @@ public:
   ///   by a call.
   ProgramStateRef
   runCheckersForRegionChanges(ProgramStateRef state,
-                            const StoreManager::InvalidatedSymbols *invalidated,
+                              const InvalidatedSymbols *invalidated,
                               ArrayRef<const MemRegion *> ExplicitRegions,
                               ArrayRef<const MemRegion *> Regions,
                               const CallEvent *Call);
 
+  /// \brief Run checkers when pointers escape.
+  ///
+  /// This notifies the checkers about pointer escape, which occurs whenever
+  /// the analyzer cannot track the symbol any more. For example, as a
+  /// result of assigning a pointer into a global or when it's passed to a 
+  /// function call the analyzer cannot model.
+  /// 
+  /// \param State The state at the point of escape.
+  /// \param Escaped The list of escaped symbols.
+  /// \param Call The corresponding CallEvent, if the symbols escape as 
+  ///        parameters to the given call.
+  /// \param IsConst Specifies if the pointer is const.
+  /// \returns Checkers can modify the state by returning a new one.
+  ProgramStateRef 
+  runCheckersForPointerEscape(ProgramStateRef State,
+                              const InvalidatedSymbols &Escaped,
+                              const CallEvent *Call,
+                              PointerEscapeKind Kind,
+                              bool IsConst = false);
+
   /// \brief Run checkers for handling assumptions on symbolic values.
   ProgramStateRef runCheckersForEvalAssume(ProgramStateRef state,
-                                               SVal Cond, bool Assumption);
+                                           SVal Cond, bool Assumption);
 
   /// \brief Run checkers for evaluating a call.
   ///
@@ -382,7 +422,7 @@ public:
       CheckEndAnalysisFunc;
   
   typedef CheckerFn<void (CheckerContext &)>
-      CheckEndPathFunc;
+      CheckEndFunctionFunc;
   
   typedef CheckerFn<void (const Stmt *, CheckerContext &)>
       CheckBranchConditionFunc;
@@ -393,13 +433,20 @@ public:
   typedef CheckerFn<void (ProgramStateRef,SymbolReaper &)> CheckLiveSymbolsFunc;
   
   typedef CheckerFn<ProgramStateRef (ProgramStateRef,
-                                const StoreManager::InvalidatedSymbols *symbols,
+                                const InvalidatedSymbols *symbols,
                                 ArrayRef<const MemRegion *> ExplicitRegions,
                                 ArrayRef<const MemRegion *> Regions,
                                 const CallEvent *Call)>
       CheckRegionChangesFunc;
   
   typedef CheckerFn<bool (ProgramStateRef)> WantsRegionChangeUpdateFunc;
+
+  typedef CheckerFn<ProgramStateRef (ProgramStateRef,
+                                     const InvalidatedSymbols &Escaped,
+                                     const CallEvent *Call,
+                                     PointerEscapeKind Kind,
+                                     bool IsConst)>
+      CheckPointerEscapeFunc;
   
   typedef CheckerFn<ProgramStateRef (ProgramStateRef,
                                           const SVal &cond, bool assumption)>
@@ -430,7 +477,7 @@ public:
 
   void _registerForEndAnalysis(CheckEndAnalysisFunc checkfn);
 
-  void _registerForEndPath(CheckEndPathFunc checkfn);
+  void _registerForEndFunction(CheckEndFunctionFunc checkfn);
 
   void _registerForBranchCondition(CheckBranchConditionFunc checkfn);
 
@@ -441,6 +488,10 @@ public:
   void _registerForRegionChanges(CheckRegionChangesFunc checkfn,
                                  WantsRegionChangeUpdateFunc wantUpdateFn);
 
+  void _registerForPointerEscape(CheckPointerEscapeFunc checkfn);
+
+  void _registerForConstPointerEscape(CheckPointerEscapeFunc checkfn);
+
   void _registerForEvalAssume(EvalAssumeFunc checkfn);
 
   void _registerForEvalCall(EvalCallFunc checkfn);
@@ -552,7 +603,7 @@ private:
 
   std::vector<CheckEndAnalysisFunc> EndAnalysisCheckers;
 
-  std::vector<CheckEndPathFunc> EndPathCheckers;
+  std::vector<CheckEndFunctionFunc> EndFunctionCheckers;
 
   std::vector<CheckBranchConditionFunc> BranchConditionCheckers;
 
@@ -566,6 +617,8 @@ private:
   };
   std::vector<RegionChangesCheckerInfo> RegionChangesCheckers;
 
+  std::vector<CheckPointerEscapeFunc> PointerEscapeCheckers;
+
   std::vector<EvalAssumeFunc> EvalAssumeCheckers;
 
   std::vector<EvalCallFunc> EvalCallCheckers;
diff --git a/include/clang/StaticAnalyzer/Core/CheckerOptInfo.h b/include/clang/StaticAnalyzer/Core/CheckerOptInfo.h
index 6ce5b3c..e981871 100644
--- a/include/clang/StaticAnalyzer/Core/CheckerOptInfo.h
+++ b/include/clang/StaticAnalyzer/Core/CheckerOptInfo.h
@@ -11,6 +11,7 @@
 #define LLVM_CLANG_STATICANALYZER_CORE_CHECKEROPTINFO_H
 
 #include "clang/Basic/LLVM.h"
+#include "llvm/ADT/StringRef.h"
 
 namespace clang {
 namespace ento {
diff --git a/include/clang/StaticAnalyzer/Core/CheckerRegistry.h b/include/clang/StaticAnalyzer/Core/CheckerRegistry.h
index 1452d45..4557aa4 100644
--- a/include/clang/StaticAnalyzer/Core/CheckerRegistry.h
+++ b/include/clang/StaticAnalyzer/Core/CheckerRegistry.h
@@ -10,8 +10,8 @@
 #ifndef LLVM_CLANG_STATICANALYZER_CORE_CHECKERREGISTRY_H
 #define LLVM_CLANG_STATICANALYZER_CORE_CHECKERREGISTRY_H
 
-#include "clang/StaticAnalyzer/Core/CheckerManager.h"
 #include "clang/Basic/LLVM.h"
+#include "clang/StaticAnalyzer/Core/CheckerManager.h"
 #include <vector>
 
 // FIXME: move this information to an HTML file in docs/.
diff --git a/include/clang/StaticAnalyzer/Core/PathDiagnosticConsumers.h b/include/clang/StaticAnalyzer/Core/PathDiagnosticConsumers.h
index 3aab648..b856de7 100644
--- a/include/clang/StaticAnalyzer/Core/PathDiagnosticConsumers.h
+++ b/include/clang/StaticAnalyzer/Core/PathDiagnosticConsumers.h
@@ -19,6 +19,7 @@
 
 namespace clang {
 
+class AnalyzerOptions;
 class Preprocessor;
 
 namespace ento {
@@ -26,21 +27,18 @@ namespace ento {
 class PathDiagnosticConsumer;
 typedef std::vector<PathDiagnosticConsumer*> PathDiagnosticConsumers;
 
-void createHTMLDiagnosticConsumer(PathDiagnosticConsumers &C,
-                                  const std::string& prefix,
-                                  const Preprocessor &PP);
+#define CREATE_CONSUMER(NAME)\
+void create ## NAME ## DiagnosticConsumer(AnalyzerOptions &AnalyzerOpts,\
+                                          PathDiagnosticConsumers &C,\
+                                          const std::string& prefix,\
+                                          const Preprocessor &PP);
 
-void createPlistDiagnosticConsumer(PathDiagnosticConsumers &C,
-                                   const std::string& prefix,
-                                   const Preprocessor &PP);
+CREATE_CONSUMER(HTML)
+CREATE_CONSUMER(Plist)
+CREATE_CONSUMER(PlistMultiFile)
+CREATE_CONSUMER(TextPath)
 
-void createPlistMultiFileDiagnosticConsumer(PathDiagnosticConsumers &C,
-                                            const std::string& prefix,
-                                            const Preprocessor &PP);
-
-void createTextPathDiagnosticConsumer(PathDiagnosticConsumers &C,
-                                      const std::string& prefix,
-                                      const Preprocessor &PP);
+#undef CREATE_CONSUMER
 
 } // end 'ento' namespace
 } // end 'clang' namespace
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/APSIntType.h b/include/clang/StaticAnalyzer/Core/PathSensitive/APSIntType.h
index 27f3677..9502900 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/APSIntType.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/APSIntType.h
@@ -81,9 +81,12 @@ public:
 
   /// Tests whether a given value is losslessly representable using this type.
   ///
-  /// Note that signedness conversions will be rejected, even with the same bit
-  /// pattern. For example, -1s8 is not in range for 'unsigned char' (u8).
-  RangeTestResultKind testInRange(const llvm::APSInt &Val) const LLVM_READONLY;
+  /// \param Val The value to test.
+  /// \param AllowMixedSign Whether or not to allow signedness conversions.
+  ///                       This determines whether -1s8 is considered in range
+  ///                       for 'unsigned char' (u8).
+  RangeTestResultKind testInRange(const llvm::APSInt &Val,
+                                  bool AllowMixedSign) const LLVM_READONLY;
   
   bool operator==(const APSIntType &Other) const {
     return BitWidth == Other.BitWidth && IsUnsigned == Other.IsUnsigned;
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/AnalysisManager.h b/include/clang/StaticAnalyzer/Core/PathSensitive/AnalysisManager.h
index 9038ae5..458c896 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/AnalysisManager.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/AnalysisManager.h
@@ -100,7 +100,7 @@ public:
   }
 
   bool shouldInlineCall() const {
-    return options.IPAMode != None;
+    return options.getIPAMode() != IPAK_None;
   }
 
   CFG *getCFG(Decl const *D) {
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/BasicValueFactory.h b/include/clang/StaticAnalyzer/Core/PathSensitive/BasicValueFactory.h
index fb39354..1135b51 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/BasicValueFactory.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/BasicValueFactory.h
@@ -16,9 +16,10 @@
 #ifndef LLVM_CLANG_GR_BASICVALUEFACTORY_H
 #define LLVM_CLANG_GR_BASICVALUEFACTORY_H
 
+#include "clang/AST/ASTContext.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/APSIntType.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/StoreRef.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/StoreRef.h"
 
 namespace clang {
 namespace ento {
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h b/include/clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h
index a6a91e2..f990b8d 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h
@@ -16,11 +16,11 @@
 #ifndef LLVM_CLANG_STATICANALYZER_PATHSENSITIVE_CALL
 #define LLVM_CLANG_STATICANALYZER_PATHSENSITIVE_CALL
 
-#include "clang/Basic/SourceManager.h"
 #include "clang/AST/DeclCXX.h"
 #include "clang/AST/ExprCXX.h"
 #include "clang/AST/ExprObjC.h"
 #include "clang/Analysis/AnalysisContext.h"
+#include "clang/Basic/SourceManager.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h"
 #include "llvm/ADT/PointerIntPair.h"
@@ -162,11 +162,11 @@ protected:
   }
 
 
-  typedef SmallVectorImpl<const MemRegion *> RegionList;
+  typedef SmallVectorImpl<SVal> ValueList;
 
   /// \brief Used to specify non-argument regions that will be invalidated as a
   /// result of this call.
-  virtual void getExtraInvalidatedRegions(RegionList &Regions) const {}
+  virtual void getExtraInvalidatedValues(ValueList &Values) const {}
 
 public:
   virtual ~CallEvent() {}
@@ -181,7 +181,7 @@ public:
   }
 
   /// \brief The state in which the call is being evaluated.
-  ProgramStateRef getState() const {
+  const ProgramStateRef &getState() const {
     return State;
   }
 
@@ -228,6 +228,11 @@ public:
     return false;
   }
 
+  /// \brief Returns true if this is a call to a variadic function or method.
+  virtual bool isVariadic() const {
+    return false;
+  }
+
   /// \brief Returns a source range for the entire call, suitable for
   /// outputting in diagnostics.
   virtual SourceRange getSourceRange() const {
@@ -331,7 +336,9 @@ public:
   /// of some kind.
   static bool isCallStmt(const Stmt *S);
 
-  /// \brief Returns the result type of a function, method declaration.
+  /// \brief Returns the result type of a function or method declaration.
+  ///
+  /// This will return a null QualType if the result type cannot be determined.
   static QualType getDeclaredResultType(const Decl *D);
 
   // Iterator access to formal parameters and their types.
@@ -416,6 +423,10 @@ public:
     return RuntimeDefinition();
   }
 
+  virtual bool isVariadic() const {
+    return getDecl()->isVariadic();
+  }
+
   virtual bool argumentsMayEscape() const;
 
   virtual void getInitialStackFrameContents(const StackFrameContext *CalleeCtx,
@@ -493,7 +504,7 @@ protected:
   BlockCall(const BlockCall &Other) : SimpleCall(Other) {}
   virtual void cloneTo(void *Dest) const { new (Dest) BlockCall(*this); }
 
-  virtual void getExtraInvalidatedRegions(RegionList &Regions) const;
+  virtual void getExtraInvalidatedValues(ValueList &Values) const;
 
 public:
   /// \brief Returns the region associated with this instance of the block.
@@ -516,6 +527,10 @@ public:
     return RuntimeDefinition(getBlockDecl());
   }
 
+  virtual bool isVariadic() const {
+    return getBlockDecl()->isVariadic();
+  }
+
   virtual void getInitialStackFrameContents(const StackFrameContext *CalleeCtx,
                                             BindingsTy &Bindings) const;
 
@@ -533,7 +548,7 @@ public:
 /// it is written.
 class CXXInstanceCall : public AnyFunctionCall {
 protected:
-  virtual void getExtraInvalidatedRegions(RegionList &Regions) const;
+  virtual void getExtraInvalidatedValues(ValueList &Values) const;
 
   CXXInstanceCall(const CallExpr *CE, ProgramStateRef St,
                   const LocationContext *LCtx)
@@ -716,7 +731,7 @@ protected:
   CXXConstructorCall(const CXXConstructorCall &Other) : AnyFunctionCall(Other){}
   virtual void cloneTo(void *Dest) const { new (Dest) CXXConstructorCall(*this); }
 
-  virtual void getExtraInvalidatedRegions(RegionList &Regions) const;
+  virtual void getExtraInvalidatedValues(ValueList &Values) const;
 
 public:
   virtual const CXXConstructExpr *getOriginExpr() const {
@@ -815,7 +830,7 @@ protected:
   ObjCMethodCall(const ObjCMethodCall &Other) : CallEvent(Other) {}
   virtual void cloneTo(void *Dest) const { new (Dest) ObjCMethodCall(*this); }
 
-  virtual void getExtraInvalidatedRegions(RegionList &Regions) const;
+  virtual void getExtraInvalidatedValues(ValueList &Values) const;
 
   /// Check if the selector may have multiple definitions (may have overrides).
   virtual bool canBeOverridenInSubclass(ObjCInterfaceDecl *IDecl,
@@ -834,6 +849,9 @@ public:
   virtual const Expr *getArgExpr(unsigned Index) const {
     return getOriginExpr()->getArg(Index);
   }
+  virtual bool isVariadic() const {
+    return getDecl()->isVariadic();
+  }
 
   bool isInstanceMessage() const {
     return getOriginExpr()->isInstanceMessage();
@@ -1024,7 +1042,7 @@ namespace llvm {
     typedef const T *SimpleType;
 
     static SimpleType
-    getSimplifiedValue(const clang::ento::CallEventRef<T>& Val) {
+    getSimplifiedValue(clang::ento::CallEventRef<T> Val) {
       return Val.getPtr();
     }
   };
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h b/include/clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h
index 4558cd9..cda1366 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h
@@ -119,7 +119,7 @@ public:
   /// the state of the program before the checker ran. Note, checkers should
   /// not retain the node in their state since the nodes might get invalidated.
   ExplodedNode *getPredecessor() { return Pred; }
-  ProgramStateRef getState() const { return Pred->getState(); }
+  const ProgramStateRef &getState() const { return Pred->getState(); }
 
   /// \brief Check if the checker changed the state of the execution; ex: added
   /// a new transition or a bug report.
@@ -185,7 +185,7 @@ public:
   /// example, for finding variables that the given symbol was assigned to.
   static const MemRegion *getLocationRegionIfPostStore(const ExplodedNode *N) {
     ProgramPoint L = N->getLocation();
-    if (const PostStore *PSL = dyn_cast<PostStore>(&L))
+    if (Optional<PostStore> PSL = L.getAs<PostStore>())
       return reinterpret_cast<const MemRegion*>(PSL->getLocationValue());
     return 0;
   }
@@ -303,14 +303,6 @@ private:
   }
 };
 
-/// \brief A helper class which wraps a boolean value set to false by default.
-struct DefaultBool {
-  bool Val;
-  DefaultBool() : Val(false) {}
-  operator bool() const { return Val; }
-  DefaultBool &operator=(bool b) { Val = b; return *this; }
-};
-
 } // end GR namespace
 
 } // end clang namespace
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/ConstraintManager.h b/include/clang/StaticAnalyzer/Core/PathSensitive/ConstraintManager.h
index 4a78849..1e76ea6 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/ConstraintManager.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/ConstraintManager.h
@@ -14,8 +14,8 @@
 #ifndef LLVM_CLANG_GR_CONSTRAINT_MANAGER_H
 #define LLVM_CLANG_GR_CONSTRAINT_MANAGER_H
 
-#include "clang/StaticAnalyzer/Core/PathSensitive/SymbolManager.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/SymbolManager.h"
 #include "llvm/Support/SaveAndRestore.h"
 
 namespace llvm {
@@ -28,7 +28,7 @@ namespace ento {
 class SubEngine;
 
 class ConditionTruthVal {
-  llvm::Optional<bool> Val;
+  Optional<bool> Val;
 public:
   /// Construct a ConditionTruthVal indicating the constraint is constrained
   /// to either true or false, depending on the boolean value provided.
@@ -78,9 +78,13 @@ public:
     // If StTrue is infeasible, asserting the falseness of Cond is unnecessary
     // because the existing constraints already establish this.
     if (!StTrue) {
-      // FIXME: This is fairly expensive and should be disabled even in
-      // Release+Asserts builds.
+#ifndef __OPTIMIZE__
+      // This check is expensive and should be disabled even in Release+Asserts
+      // builds.
+      // FIXME: __OPTIMIZE__ is a GNU extension that Clang implements but MSVC
+      // does not. Is there a good equivalent there?
       assert(assume(State, Cond, false) && "System is over constrained.");
+#endif
       return ProgramStatePair((ProgramStateRef)NULL, State);
     }
 
@@ -118,7 +122,7 @@ public:
   /// Convenience method to query the state to see if a symbol is null or
   /// not null, or if neither assumption can be made.
   ConditionTruthVal isNull(ProgramStateRef State, SymbolRef Sym) {
-    llvm::SaveAndRestore<bool> DisableNotify(NotifyAssumeClients, false);
+    SaveAndRestore<bool> DisableNotify(NotifyAssumeClients, false);
 
     return checkNull(State, Sym);
   }
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/CoreEngine.h b/include/clang/StaticAnalyzer/Core/PathSensitive/CoreEngine.h
index b668640..a2e211e 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/CoreEngine.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/CoreEngine.h
@@ -17,10 +17,10 @@
 
 #include "clang/AST/Expr.h"
 #include "clang/Analysis/AnalysisContext.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/BlockCounter.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/FunctionSummary.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/WorkList.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/BlockCounter.h"
 #include "llvm/ADT/OwningPtr.h"
 
 namespace clang {
@@ -96,6 +96,10 @@ private:
   void HandleBranch(const Stmt *Cond, const Stmt *Term, const CFGBlock *B,
                     ExplodedNode *Pred);
 
+  /// Handle conditional logic for running static initializers.
+  void HandleStaticInit(const DeclStmt *DS, const CFGBlock *B,
+                        ExplodedNode *Pred);
+
 private:
   CoreEngine(const CoreEngine &) LLVM_DELETED_FUNCTION;
   void operator=(const CoreEngine &) LLVM_DELETED_FUNCTION;
@@ -463,7 +467,7 @@ public:
     bool operator!=(const iterator &X) const { return I != X.I; }
 
     const LabelDecl *getLabel() const {
-      return llvm::cast<LabelStmt>((*I)->getLabel())->getDecl();
+      return cast<LabelStmt>((*I)->getLabel())->getDecl();
     }
 
     const CFGBlock *getBlock() const {
@@ -510,7 +514,7 @@ public:
     bool operator==(const iterator &X) const { return I == X.I; }
 
     const CaseStmt *getCase() const {
-      return llvm::cast<CaseStmt>((*I)->getLabel());
+      return cast<CaseStmt>((*I)->getLabel());
     }
 
     const CFGBlock *getBlock() const {
@@ -522,7 +526,7 @@ public:
   iterator end() { return iterator(Src->succ_rend()); }
 
   const SwitchStmt *getSwitch() const {
-    return llvm::cast<SwitchStmt>(Src->getTerminator());
+    return cast<SwitchStmt>(Src->getTerminator());
   }
 
   ExplodedNode *generateCaseStmtNode(const iterator &I,
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/Environment.h b/include/clang/StaticAnalyzer/Core/PathSensitive/Environment.h
index eb9bd85..f3a582d 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/Environment.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/Environment.h
@@ -33,9 +33,6 @@ class SValBuilder;
 /// other things.
 class EnvironmentEntry : public std::pair<const Stmt*,
                                           const StackFrameContext *> {
-  friend class EnvironmentManager;
-  EnvironmentEntry makeLocation() const;
-
 public:
   EnvironmentEntry(const Stmt *s, const LocationContext *L);
 
@@ -118,13 +115,6 @@ public:
   /// Bind a symbolic value to the given environment entry.
   Environment bindExpr(Environment Env, const EnvironmentEntry &E, SVal V,
                        bool Invalidate);
-  
-  /// Bind the location 'location' and value 'V' to the specified
-  /// environment entry.
-  Environment bindExprAndLocation(Environment Env,
-                                  const EnvironmentEntry &E,
-                                  SVal location,
-                                  SVal V);
 
   Environment removeDeadBindings(Environment Env,
                                  SymbolReaper &SymReaper,
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h b/include/clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h
index b112e66..5211916 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h
@@ -19,19 +19,19 @@
 #ifndef LLVM_CLANG_GR_EXPLODEDGRAPH
 #define LLVM_CLANG_GR_EXPLODEDGRAPH
 
-#include "clang/Analysis/ProgramPoint.h"
-#include "clang/Analysis/AnalysisContext.h"
 #include "clang/AST/Decl.h"
-#include "llvm/ADT/SmallVector.h"
+#include "clang/Analysis/AnalysisContext.h"
+#include "clang/Analysis/ProgramPoint.h"
+#include "clang/Analysis/Support/BumpVector.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h"
+#include "llvm/ADT/DepthFirstIterator.h"
 #include "llvm/ADT/FoldingSet.h"
+#include "llvm/ADT/GraphTraits.h"
+#include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/SmallVector.h"
 #include "llvm/Support/Allocator.h"
-#include "llvm/ADT/OwningPtr.h"
-#include "llvm/ADT/GraphTraits.h"
-#include "llvm/ADT/DepthFirstIterator.h"
 #include "llvm/Support/Casting.h"
-#include "clang/Analysis/Support/BumpVector.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h"
 #include <vector>
 
 namespace clang {
@@ -152,10 +152,12 @@ public:
     return *getLocationContext()->getAnalysis<T>();
   }
 
-  ProgramStateRef getState() const { return State; }
+  const ProgramStateRef &getState() const { return State; }
 
   template <typename T>
-  const T* getLocationAs() const { return llvm::dyn_cast<T>(&Location); }
+  Optional<T> getLocationAs() const LLVM_LVALUE_FUNCTION {
+    return Location.getAs<T>();
+  }
 
   static void Profile(llvm::FoldingSetNodeID &ID,
                       const ProgramPoint &Loc,
@@ -167,7 +169,8 @@ public:
   }
 
   void Profile(llvm::FoldingSetNodeID& ID) const {
-    Profile(ID, getLocation(), getState(), isSink());
+    // We avoid copy constructors by not using accessors.
+    Profile(ID, Location, State, isSink());
   }
 
   /// addPredeccessor - Adds a predecessor to the current node, and
@@ -236,18 +239,8 @@ private:
   void replacePredecessor(ExplodedNode *node) { Preds.replaceNode(node); }
 };
 
-// FIXME: Is this class necessary?
-class InterExplodedGraphMap {
-  virtual void anchor();
-  llvm::DenseMap<const ExplodedNode*, ExplodedNode*> M;
-  friend class ExplodedGraph;
-
-public:
-  ExplodedNode *getMappedNode(const ExplodedNode *N) const;
-
-  InterExplodedGraphMap() {}
-  virtual ~InterExplodedGraphMap() {}
-};
+typedef llvm::DenseMap<const ExplodedNode *, const ExplodedNode *>
+        InterExplodedGraphMap;
 
 class ExplodedGraph {
 protected:
@@ -365,14 +358,19 @@ public:
 
   typedef llvm::DenseMap<const ExplodedNode*, ExplodedNode*> NodeMap;
 
-  std::pair<ExplodedGraph*, InterExplodedGraphMap*>
-  Trim(const NodeTy* const* NBeg, const NodeTy* const* NEnd,
-       llvm::DenseMap<const void*, const void*> *InverseMap = 0) const;
-
-  ExplodedGraph* TrimInternal(const ExplodedNode* const * NBeg,
-                              const ExplodedNode* const * NEnd,
-                              InterExplodedGraphMap *M,
-                    llvm::DenseMap<const void*, const void*> *InverseMap) const;
+  /// Creates a trimmed version of the graph that only contains paths leading
+  /// to the given nodes.
+  ///
+  /// \param Nodes The nodes which must appear in the final graph. Presumably
+  ///              these are end-of-path nodes (i.e. they have no successors).
+  /// \param[out] ForwardMap A optional map from nodes in this graph to nodes in
+  ///                        the returned graph.
+  /// \param[out] InverseMap An optional map from nodes in the returned graph to
+  ///                        nodes in this graph.
+  /// \returns The trimmed graph
+  ExplodedGraph *trim(ArrayRef<const NodeTy *> Nodes,
+                      InterExplodedGraphMap *ForwardMap = 0,
+                      InterExplodedGraphMap *InverseMap = 0) const;
 
   /// Enable tracking of recently allocated nodes for potential reclamation
   /// when calling reclaimRecentlyAllocatedNodes().
@@ -384,6 +382,10 @@ public:
   /// was called.
   void reclaimRecentlyAllocatedNodes();
 
+  /// \brief Returns true if nodes for the given expression kind are always
+  ///        kept around.
+  static bool isInterestingLValueExpr(const Expr *Ex);
+
 private:
   bool shouldCollect(const ExplodedNode *node);
   void collectNode(ExplodedNode *node);
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h b/include/clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h
index 78b2542..33e4431 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h
@@ -16,15 +16,15 @@
 #ifndef LLVM_CLANG_GR_EXPRENGINE
 #define LLVM_CLANG_GR_EXPRENGINE
 
+#include "clang/AST/Expr.h"
+#include "clang/AST/Type.h"
 #include "clang/Analysis/DomainSpecific/ObjCNoReturn.h"
+#include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/AnalysisManager.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/SubEngine.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/CoreEngine.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/ProgramStateTrait.h"
-#include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.h"
-#include "clang/AST/Expr.h"
-#include "clang/AST/Type.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/SubEngine.h"
 
 namespace clang {
 
@@ -44,8 +44,19 @@ namespace ento {
 class AnalysisManager;
 class CallEvent;
 class SimpleCall;
+class CXXConstructorCall;
 
 class ExprEngine : public SubEngine {
+public:
+  /// The modes of inlining, which override the default analysis-wide settings.
+  enum InliningModes {
+    /// Follow the default settings for inlining callees.
+    Inline_Regular = 0,
+    /// Do minimal inlining of callees.
+    Inline_Minimal = 0x1
+  };
+
+private:
   AnalysisManager &AMgr;
   
   AnalysisDeclContextManager &AnalysisDeclContexts;
@@ -64,15 +75,6 @@ class ExprEngine : public SubEngine {
   /// svalBuilder - SValBuilder object that creates SVals from expressions.
   SValBuilder &svalBuilder;
 
-  /// EntryNode - The immediate predecessor node.
-  ExplodedNode *EntryNode;
-
-  /// CleanedState - The state for EntryNode "cleaned" of all dead
-  ///  variables and symbols (as determined by a liveness analysis).
-  ProgramStateRef CleanedState;
-
-  /// currStmt - The current block-level statement.
-  const Stmt *currStmt;
   unsigned int currStmtIdx;
   const NodeBuilderContext *currBldrCtx;
   
@@ -92,10 +94,14 @@ class ExprEngine : public SubEngine {
   /// AnalysisConsumer. It can be null.
   SetOfConstDecls *VisitedCallees;
 
+  /// The flag, which specifies the mode of inlining for the engine.
+  InliningModes HowToInline;
+
 public:
   ExprEngine(AnalysisManager &mgr, bool gcEnabled,
              SetOfConstDecls *VisitedCalleesIn,
-             FunctionSummariesTy *FS);
+             FunctionSummariesTy *FS,
+             InliningModes HowToInlineIn);
 
   ~ExprEngine();
 
@@ -140,11 +146,12 @@ public:
   void enqueueEndOfPath(ExplodedNodeSet &S);
   void GenerateCallExitNode(ExplodedNode *N);
 
-  /// ViewGraph - Visualize the ExplodedGraph created by executing the
-  ///  simulation.
+  /// Visualize the ExplodedGraph created by executing the simulation.
   void ViewGraph(bool trim = false);
 
-  void ViewGraph(ExplodedNode** Beg, ExplodedNode** End);
+  /// Visualize a trimmed ExplodedGraph that only contains paths to the given
+  /// nodes.
+  void ViewGraph(ArrayRef<const ExplodedNode*> Nodes);
 
   /// getInitialState - Return the initial state used for the root vertex
   ///  in the ExplodedGraph.
@@ -154,26 +161,33 @@ public:
   const ExplodedGraph& getGraph() const { return G; }
 
   /// \brief Run the analyzer's garbage collection - remove dead symbols and
-  /// bindings.
+  /// bindings from the state.
   ///
-  /// \param Node - The predecessor node, from which the processing should 
-  /// start.
-  /// \param Out - The returned set of output nodes.
-  /// \param ReferenceStmt - Run garbage collection using the symbols, 
-  /// which are live before the given statement.
-  /// \param LC - The location context of the ReferenceStmt.
-  /// \param DiagnosticStmt - the statement used to associate the diagnostic 
-  /// message, if any warnings should occur while removing the dead (leaks 
-  /// are usually reported here).
-  /// \param K - In some cases it is possible to use PreStmt kind. (Do 
-  /// not use it unless you know what you are doing.) 
-  /// If the ReferenceStmt is NULL, everything is this and parent contexts is
-  /// considered live.
-  /// If the stack frame context is NULL, everything on stack is considered
-  /// dead.
+  /// Checkers can participate in this process with two callbacks:
+  /// \c checkLiveSymbols and \c checkDeadSymbols. See the CheckerDocumentation
+  /// class for more information.
+  ///
+  /// \param Node The predecessor node, from which the processing should start.
+  /// \param Out The returned set of output nodes.
+  /// \param ReferenceStmt The statement which is about to be processed.
+  ///        Everything needed for this statement should be considered live.
+  ///        A null statement means that everything in child LocationContexts
+  ///        is dead.
+  /// \param LC The location context of the \p ReferenceStmt. A null location
+  ///        context means that we have reached the end of analysis and that
+  ///        all statements and local variables should be considered dead.
+  /// \param DiagnosticStmt Used as a location for any warnings that should
+  ///        occur while removing the dead (e.g. leaks). By default, the
+  ///        \p ReferenceStmt is used.
+  /// \param K Denotes whether this is a pre- or post-statement purge. This
+  ///        must only be ProgramPoint::PostStmtPurgeDeadSymbolsKind if an
+  ///        entire location context is being cleared, in which case the
+  ///        \p ReferenceStmt must either be a ReturnStmt or \c NULL. Otherwise,
+  ///        it must be ProgramPoint::PreStmtPurgeDeadSymbolsKind (the default)
+  ///        and \p ReferenceStmt must be valid (non-null).
   void removeDead(ExplodedNode *Node, ExplodedNodeSet &Out,
-            const Stmt *ReferenceStmt, const StackFrameContext *LC,
-            const Stmt *DiagnosticStmt,
+            const Stmt *ReferenceStmt, const LocationContext *LC,
+            const Stmt *DiagnosticStmt = 0,
             ProgramPoint::Kind K = ProgramPoint::PreStmtPurgeDeadSymbolsKind);
 
   /// processCFGElement - Called by CoreEngine. Used to generate new successor
@@ -210,6 +224,15 @@ public:
                      const CFGBlock *DstT,
                      const CFGBlock *DstF);
 
+  /// Called by CoreEngine.  Used to processing branching behavior
+  /// at static initalizers.
+  void processStaticInitializer(const DeclStmt *DS,
+                                NodeBuilderContext& BuilderCtx,
+                                ExplodedNode *Pred,
+                                ExplodedNodeSet &Dst,
+                                const CFGBlock *DstT,
+                                const CFGBlock *DstF);
+
   /// processIndirectGoto - Called by CoreEngine.  Used to generate successor
   ///  nodes by processing the 'effects' of a computed goto jump.
   void processIndirectGoto(IndirectGotoNodeBuilder& builder);
@@ -218,8 +241,8 @@ public:
   ///  nodes by processing the 'effects' of a switch statement.
   void processSwitch(SwitchNodeBuilder& builder);
 
-  /// ProcessEndPath - Called by CoreEngine.  Used to generate end-of-path
-  ///  nodes when the control reaches the end of a function.
+  /// Called by CoreEngine.  Used to generate end-of-path
+  /// nodes when the control reaches the end of a function.
   void processEndOfFunction(NodeBuilderContext& BC,
                             ExplodedNode *Pred);
 
@@ -250,7 +273,7 @@ public:
   ///  to the store. Used to update checkers that track region values.
   ProgramStateRef 
   processRegionChanges(ProgramStateRef state,
-                       const StoreManager::InvalidatedSymbols *invalidated,
+                       const InvalidatedSymbols *invalidated,
                        ArrayRef<const MemRegion *> ExplicitRegions,
                        ArrayRef<const MemRegion *> Regions,
                        const CallEvent *Call);
@@ -416,11 +439,11 @@ public:
     geteagerlyAssumeBinOpBifurcationTags();
 
   SVal evalMinus(SVal X) {
-    return X.isValid() ? svalBuilder.evalMinus(cast<NonLoc>(X)) : X;
+    return X.isValid() ? svalBuilder.evalMinus(X.castAs<NonLoc>()) : X;
   }
 
   SVal evalComplement(SVal X) {
-    return X.isValid() ? svalBuilder.evalComplement(cast<NonLoc>(X)) : X;
+    return X.isValid() ? svalBuilder.evalComplement(X.castAs<NonLoc>()) : X;
   }
 
 public:
@@ -432,7 +455,8 @@ public:
 
   SVal evalBinOp(ProgramStateRef state, BinaryOperator::Opcode op,
                  NonLoc L, SVal R, QualType T) {
-    return R.isValid() ? svalBuilder.evalBinOpNN(state,op,L, cast<NonLoc>(R), T) : R;
+    return R.isValid() ? svalBuilder.evalBinOpNN(state, op, L,
+                                                 R.castAs<NonLoc>(), T) : R;
   }
 
   SVal evalBinOp(ProgramStateRef ST, BinaryOperator::Opcode Op,
@@ -447,6 +471,20 @@ protected:
                 SVal location, SVal Val, bool atDeclInit = false,
                 const ProgramPoint *PP = 0);
 
+  /// Call PointerEscape callback when a value escapes as a result of bind.
+  ProgramStateRef processPointerEscapedOnBind(ProgramStateRef State,
+                                              SVal Loc, SVal Val);
+  /// Call PointerEscape callback when a value escapes as a result of
+  /// region invalidation.
+  /// \param[in] IsConst Specifies that the pointer is const.
+  ProgramStateRef notifyCheckersOfPointerEscape(
+                            ProgramStateRef State,
+                            const InvalidatedSymbols *Invalidated,
+                            ArrayRef<const MemRegion *> ExplicitRegions,
+                            ArrayRef<const MemRegion *> Regions,
+                            const CallEvent *Call,
+                            bool IsConst);
+
 public:
   // FIXME: 'tag' should be removed, and a LocationContext should be used
   // instead.
@@ -506,7 +544,10 @@ private:
   void examineStackFrames(const Decl *D, const LocationContext *LCtx,
                           bool &IsRecursive, unsigned &StackDepth);
 
-  bool shouldInlineDecl(const Decl *D, ExplodedNode *Pred);
+  /// Checks our policies and decides weither the given call should be inlined.
+  bool shouldInlineCall(const CallEvent &Call, const Decl *D,
+                        const ExplodedNode *Pred);
+
   bool inlineCall(const CallEvent &Call, const Decl *D, NodeBuilder &Bldr,
                   ExplodedNode *Pred, ProgramStateRef State);
 
@@ -522,6 +563,22 @@ private:
                      ExplodedNode *Pred);
 
   bool replayWithoutInlining(ExplodedNode *P, const LocationContext *CalleeLC);
+
+  /// Models a trivial copy or move constructor or trivial assignment operator
+  /// call with a simple bind.
+  void performTrivialCopy(NodeBuilder &Bldr, ExplodedNode *Pred,
+                          const CallEvent &Call);
+
+  /// If the value of the given expression is a NonLoc, copy it into a new
+  /// temporary object region, and replace the value of the expression with
+  /// that.
+  ///
+  /// If \p ResultE is provided, the new region will be bound to this expression
+  /// instead of \p E.
+  ProgramStateRef createTemporaryRegionIfNeeded(ProgramStateRef State,
+                                                const LocationContext *LC,
+                                                const Expr *E,
+                                                const Expr *ResultE = 0);
 };
 
 /// Traits for storing the call processing policy inside GDM.
@@ -531,7 +588,7 @@ private:
 struct ReplayWithoutInlining{};
 template <>
 struct ProgramStateTrait<ReplayWithoutInlining> :
-  public ProgramStatePartialTrait<void*> {
+  public ProgramStatePartialTrait<const void*> {
   static void *GDMIndex() { static int index = 0; return &index; }
 };
 
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/FunctionSummary.h b/include/clang/StaticAnalyzer/Core/PathSensitive/FunctionSummary.h
index cf4a692..169af93 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/FunctionSummary.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/FunctionSummary.h
@@ -7,94 +7,126 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// This file defines a summary of a function gathered/used by static analyzes.
+// This file defines a summary of a function gathered/used by static analysis.
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_CLANG_GR_FUNCTIONSUMMARY_H
 #define LLVM_CLANG_GR_FUNCTIONSUMMARY_H
 
-#include <deque>
-#include "clang/AST/Decl.h"
+#include "clang/Basic/LLVM.h"
 #include "llvm/ADT/DenseMap.h"
 #include "llvm/ADT/DenseSet.h"
-#include "llvm/ADT/BitVector.h"
+#include "llvm/ADT/Optional.h"
+#include "llvm/ADT/SmallBitVector.h"
+#include <deque>
 
 namespace clang {
+class Decl;
+
 namespace ento {
 typedef std::deque<Decl*> SetOfDecls;
 typedef llvm::DenseSet<const Decl*> SetOfConstDecls;
 
 class FunctionSummariesTy {
-  struct FunctionSummary {
-    /// True if this function has reached a max block count while inlined from
-    /// at least one call site.
-    bool MayReachMaxBlockCount;
+  class FunctionSummary {
+  public:
+    /// Marks the IDs of the basic blocks visited during the analyzes.
+    llvm::SmallBitVector VisitedBasicBlocks;
 
     /// Total number of blocks in the function.
-    unsigned TotalBasicBlocks;
+    unsigned TotalBasicBlocks : 30;
 
-    /// Marks the IDs of the basic blocks visited during the analyzes.
-    llvm::BitVector VisitedBasicBlocks;
+    /// True if this function has been checked against the rules for which
+    /// functions may be inlined.
+    unsigned InlineChecked : 1;
+
+    /// True if this function may be inlined.
+    unsigned MayInline : 1;
+
+    /// The number of times the function has been inlined.
+    unsigned TimesInlined : 32;
 
     FunctionSummary() :
-      MayReachMaxBlockCount(false),
       TotalBasicBlocks(0),
-      VisitedBasicBlocks(0) {}
+      InlineChecked(0),
+      TimesInlined(0) {}
   };
 
-  typedef llvm::DenseMap<const Decl*, FunctionSummary*> MapTy;
+  typedef llvm::DenseMap<const Decl *, FunctionSummary> MapTy;
   MapTy Map;
 
 public:
-  ~FunctionSummariesTy();
-
   MapTy::iterator findOrInsertSummary(const Decl *D) {
     MapTy::iterator I = Map.find(D);
     if (I != Map.end())
       return I;
-    FunctionSummary *DS = new FunctionSummary();
-    I = Map.insert(std::pair<const Decl*, FunctionSummary*>(D, DS)).first;
+
+    typedef std::pair<const Decl *, FunctionSummary> KVPair;
+    I = Map.insert(KVPair(D, FunctionSummary())).first;
     assert(I != Map.end());
     return I;
   }
 
-  void markReachedMaxBlockCount(const Decl* D) {
+  void markMayInline(const Decl *D) {
     MapTy::iterator I = findOrInsertSummary(D);
-    I->second->MayReachMaxBlockCount = true;
+    I->second.InlineChecked = 1;
+    I->second.MayInline = 1;
   }
 
-  bool hasReachedMaxBlockCount(const Decl* D) {
-  MapTy::const_iterator I = Map.find(D);
-    if (I != Map.end())
-      return I->second->MayReachMaxBlockCount;
-    return false;
+  void markShouldNotInline(const Decl *D) {
+    MapTy::iterator I = findOrInsertSummary(D);
+    I->second.InlineChecked = 1;
+    I->second.MayInline = 0;
+  }
+
+  void markReachedMaxBlockCount(const Decl *D) {
+    markShouldNotInline(D);
+  }
+
+  Optional<bool> mayInline(const Decl *D) {
+    MapTy::const_iterator I = Map.find(D);
+    if (I != Map.end() && I->second.InlineChecked)
+      return I->second.MayInline;
+    return None;
   }
 
   void markVisitedBasicBlock(unsigned ID, const Decl* D, unsigned TotalIDs) {
     MapTy::iterator I = findOrInsertSummary(D);
-    llvm::BitVector &Blocks = I->second->VisitedBasicBlocks;
+    llvm::SmallBitVector &Blocks = I->second.VisitedBasicBlocks;
     assert(ID < TotalIDs);
     if (TotalIDs > Blocks.size()) {
       Blocks.resize(TotalIDs);
-      I->second->TotalBasicBlocks = TotalIDs;
+      I->second.TotalBasicBlocks = TotalIDs;
     }
-    Blocks[ID] = true;
+    Blocks.set(ID);
   }
 
   unsigned getNumVisitedBasicBlocks(const Decl* D) {
     MapTy::const_iterator I = Map.find(D);
-      if (I != Map.end())
-        return I->second->VisitedBasicBlocks.count();
+    if (I != Map.end())
+      return I->second.VisitedBasicBlocks.count();
     return 0;
   }
 
+  unsigned getNumTimesInlined(const Decl* D) {
+    MapTy::const_iterator I = Map.find(D);
+    if (I != Map.end())
+      return I->second.TimesInlined;
+    return 0;
+  }
+
+  void bumpNumTimesInlined(const Decl* D) {
+    MapTy::iterator I = findOrInsertSummary(D);
+    I->second.TimesInlined++;
+  }
+
   /// Get the percentage of the reachable blocks.
   unsigned getPercentBlocksReachable(const Decl *D) {
     MapTy::const_iterator I = Map.find(D);
       if (I != Map.end())
-        return ((I->second->VisitedBasicBlocks.count() * 100) /
-                 I->second->TotalBasicBlocks);
+        return ((I->second.VisitedBasicBlocks.count() * 100) /
+                 I->second.TotalBasicBlocks);
     return 0;
   }
 
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/MemRegion.h b/include/clang/StaticAnalyzer/Core/PathSensitive/MemRegion.h
index 34fbc3c..af2f365 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/MemRegion.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/MemRegion.h
@@ -22,8 +22,8 @@
 #include "clang/AST/ExprObjC.h"
 #include "clang/Basic/LLVM.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h"
-#include "llvm/Support/ErrorHandling.h"
 #include "llvm/ADT/FoldingSet.h"
+#include "llvm/Support/ErrorHandling.h"
 #include <string>
 
 namespace llvm {
@@ -642,26 +642,20 @@ public:
     explicit referenced_vars_iterator(const MemRegion * const *r,
                                       const MemRegion * const *originalR)
       : R(r), OriginalR(originalR) {}
-    
-    operator const MemRegion * const *() const {
-      return R;
-    }
-  
-    const MemRegion *getCapturedRegion() const {
-      return *R;
-    }
-    const MemRegion *getOriginalRegion() const {
-      return *OriginalR;
-    }
 
-    const VarRegion* operator*() const {
+    const VarRegion *getCapturedRegion() const {
       return cast<VarRegion>(*R);
     }
-    
+    const VarRegion *getOriginalRegion() const {
+      return cast<VarRegion>(*OriginalR);
+    }
+
     bool operator==(const referenced_vars_iterator &I) const {
+      assert((R == 0) == (I.R == 0));
       return I.R == R;
     }
     bool operator!=(const referenced_vars_iterator &I) const {
+      assert((R == 0) == (I.R == 0));
       return I.R != R;
     }
     referenced_vars_iterator &operator++() {
@@ -670,6 +664,10 @@ public:
       return *this;
     }
   };
+
+  /// Return the original region for a captured region, if
+  /// one exists.
+  const VarRegion *getOriginalRegion(const VarRegion *VR) const;
       
   referenced_vars_iterator referenced_vars_begin() const;
   referenced_vars_iterator referenced_vars_end() const;  
@@ -686,6 +684,8 @@ public:
   }
 private:
   void LazyInitializeReferencedVars();
+  std::pair<const VarRegion *, const VarRegion *>
+  getCaptureRegions(const VarDecl *VD);
 };
 
 /// SymbolicRegion - A special, "non-concrete" region. Unlike other region
@@ -952,6 +952,9 @@ public:
   const ObjCIvarDecl *getDecl() const;
   QualType getValueType() const;
 
+  bool canPrintPretty() const;
+  void printPretty(raw_ostream &os) const;
+
   void dumpToStream(raw_ostream &os) const;
 
   static bool classof(const MemRegion* R) {
@@ -993,8 +996,8 @@ class ElementRegion : public TypedValueRegion {
   ElementRegion(QualType elementType, NonLoc Idx, const MemRegion* sReg)
     : TypedValueRegion(sReg, ElementRegionKind),
       ElementType(elementType), Index(Idx) {
-    assert((!isa<nonloc::ConcreteInt>(&Idx) ||
-           cast<nonloc::ConcreteInt>(&Idx)->getValue().isSigned()) &&
+    assert((!Idx.getAs<nonloc::ConcreteInt>() ||
+            Idx.castAs<nonloc::ConcreteInt>().getValue().isSigned()) &&
            "The index must be signed");
   }
 
@@ -1057,16 +1060,18 @@ public:
 class CXXBaseObjectRegion : public TypedValueRegion {
   friend class MemRegionManager;
 
-  const CXXRecordDecl *decl;
+  llvm::PointerIntPair<const CXXRecordDecl *, 1, bool> Data;
 
-  CXXBaseObjectRegion(const CXXRecordDecl *d, const MemRegion *sReg)
-    : TypedValueRegion(sReg, CXXBaseObjectRegionKind), decl(d) {}
+  CXXBaseObjectRegion(const CXXRecordDecl *RD, bool IsVirtual,
+                      const MemRegion *SReg)
+    : TypedValueRegion(SReg, CXXBaseObjectRegionKind), Data(RD, IsVirtual) {}
 
-  static void ProfileRegion(llvm::FoldingSetNodeID &ID,
-                            const CXXRecordDecl *decl, const MemRegion *sReg);
+  static void ProfileRegion(llvm::FoldingSetNodeID &ID, const CXXRecordDecl *RD,
+                            bool IsVirtual, const MemRegion *SReg);
 
 public:
-  const CXXRecordDecl *getDecl() const { return decl; }
+  const CXXRecordDecl *getDecl() const { return Data.getPointer(); }
+  bool isVirtual() const { return Data.getInt(); }
 
   QualType getValueType() const;
 
@@ -1216,15 +1221,21 @@ public:
   const CXXTempObjectRegion *getCXXTempObjectRegion(Expr const *Ex,
                                                     LocationContext const *LC);
 
-  const CXXBaseObjectRegion *getCXXBaseObjectRegion(const CXXRecordDecl *decl,
-                                                  const MemRegion *superRegion);
+  /// Create a CXXBaseObjectRegion with the given base class for region
+  /// \p Super.
+  ///
+  /// The type of \p Super is assumed be a class deriving from \p BaseClass.
+  const CXXBaseObjectRegion *
+  getCXXBaseObjectRegion(const CXXRecordDecl *BaseClass, const MemRegion *Super,
+                         bool IsVirtual);
 
   /// Create a CXXBaseObjectRegion with the same CXXRecordDecl but a different
   /// super region.
   const CXXBaseObjectRegion *
   getCXXBaseObjectRegionWithSuper(const CXXBaseObjectRegion *baseReg, 
                                   const MemRegion *superRegion) {
-    return getCXXBaseObjectRegion(baseReg->getDecl(), superRegion);
+    return getCXXBaseObjectRegion(baseReg->getDecl(), superRegion,
+                                  baseReg->isVirtual());
   }
 
   const FunctionTextRegion *getFunctionTextRegion(const NamedDecl *FD);
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h b/include/clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h
index 86c94de..6ea7211 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h
@@ -18,13 +18,13 @@
 #include "clang/StaticAnalyzer/Core/PathSensitive/ConstraintManager.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/DynamicTypeInfo.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/Environment.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/Store.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/SValBuilder.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState_Fwd.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/SValBuilder.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/Store.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/TaintTag.h"
-#include "llvm/ADT/PointerIntPair.h"
 #include "llvm/ADT/FoldingSet.h"
 #include "llvm/ADT/ImmutableMap.h"
+#include "llvm/ADT/PointerIntPair.h"
 
 namespace llvm {
 class APSInt;
@@ -170,19 +170,30 @@ public:
   // If no new state is feasible, NULL is returned.
   //
 
+  /// Assumes that the value of \p cond is zero (if \p assumption is "false")
+  /// or non-zero (if \p assumption is "true").
+  ///
+  /// This returns a new state with the added constraint on \p cond.
+  /// If no new state is feasible, NULL is returned.
   ProgramStateRef assume(DefinedOrUnknownSVal cond, bool assumption) const;
 
-  /// This method assumes both "true" and "false" for 'cond', and
-  ///  returns both corresponding states.  It's shorthand for doing
-  ///  'assume' twice.
-  std::pair<ProgramStateRef , ProgramStateRef >
+  /// Assumes both "true" and "false" for \p cond, and returns both
+  /// corresponding states (respectively).
+  ///
+  /// This is more efficient than calling assume() twice. Note that one (but not
+  /// both) of the returned states may be NULL.
+  std::pair<ProgramStateRef, ProgramStateRef>
   assume(DefinedOrUnknownSVal cond) const;
 
   ProgramStateRef assumeInBound(DefinedOrUnknownSVal idx,
                                DefinedOrUnknownSVal upperBound,
                                bool assumption,
                                QualType IndexType = QualType()) const;
-
+  
+  /// \brief Check if the given SVal is constrained to zero or is a zero
+  ///        constant.
+  ConditionTruthVal isNull(SVal V) const;
+  
   /// Utility method for getting regions.
   const VarRegion* getRegion(const VarDecl *D, const LocationContext *LC) const;
 
@@ -203,12 +214,6 @@ public:
   ProgramStateRef BindExpr(const Stmt *S, const LocationContext *LCtx,
                                SVal V, bool Invalidate = true) const;
 
-  /// Create a new state by binding the value 'V' and location 'locaton' to the
-  /// statement 'S' in the state's environment.
-  ProgramStateRef bindExprAndLocation(const Stmt *S,
-                                          const LocationContext *LCtx,
-                                          SVal location, SVal V) const;
-
   ProgramStateRef bindLoc(Loc location,
                           SVal V,
                           bool notifyChanges = true) const;
@@ -219,14 +224,38 @@ public:
 
   ProgramStateRef killBinding(Loc LV) const;
 
-  /// invalidateRegions - Returns the state with bindings for the given regions
-  ///  cleared from the store. The regions are provided as a continuous array
-  ///  from Begin to End. Optionally invalidates global regions as well.
-  ProgramStateRef invalidateRegions(ArrayRef<const MemRegion *> Regions,
-                               const Expr *E, unsigned BlockCount,
-                               const LocationContext *LCtx,
-                               StoreManager::InvalidatedSymbols *IS = 0,
-                               const CallEvent *Call = 0) const;
+  /// \brief Returns the state with bindings for the given regions
+  ///  cleared from the store.
+  ///
+  /// Optionally invalidates global regions as well.
+  ///
+  /// \param Regions the set of regions to be invalidated.
+  /// \param E the expression that caused the invalidation.
+  /// \param BlockCount The number of times the current basic block has been
+  //         visited.
+  /// \param CausesPointerEscape the flag is set to true when
+  ///        the invalidation entails escape of a symbol (representing a
+  ///        pointer). For example, due to it being passed as an argument in a
+  ///        call.
+  /// \param IS the set of invalidated symbols.
+  /// \param Call if non-null, the invalidated regions represent parameters to
+  ///        the call and should be considered directly invalidated.
+  /// \param ConstRegions the set of regions whose contents are accessible,
+  ///        even though the regions themselves should not be invalidated.
+  ProgramStateRef
+  invalidateRegions(ArrayRef<const MemRegion *> Regions, const Expr *E,
+                    unsigned BlockCount, const LocationContext *LCtx,
+                    bool CausesPointerEscape, InvalidatedSymbols *IS = 0,
+                    const CallEvent *Call = 0,
+                    ArrayRef<const MemRegion *> ConstRegions =
+                      ArrayRef<const MemRegion *>()) const;
+
+  ProgramStateRef
+  invalidateRegions(ArrayRef<SVal> Regions, const Expr *E,
+                    unsigned BlockCount, const LocationContext *LCtx,
+                    bool CausesPointerEscape, InvalidatedSymbols *IS = 0,
+                    const CallEvent *Call = 0,
+                    ArrayRef<SVal> ConstRegions = ArrayRef<SVal>()) const;
 
   /// enterStackFrame - Returns the state for entry to the given stack frame,
   ///  preserving the current state.
@@ -396,13 +425,17 @@ public:
 private:
   friend void ProgramStateRetain(const ProgramState *state);
   friend void ProgramStateRelease(const ProgramState *state);
-  
-  ProgramStateRef 
-  invalidateRegionsImpl(ArrayRef<const MemRegion *> Regions,
+
+  /// \sa invalidateValues()
+  /// \sa invalidateRegions()
+  ProgramStateRef
+  invalidateRegionsImpl(ArrayRef<SVal> Values,
                         const Expr *E, unsigned BlockCount,
                         const LocationContext *LCtx,
-                        StoreManager::InvalidatedSymbols &IS,
-                        const CallEvent *Call) const;
+                        bool ResultsInSymbolEscape,
+                        InvalidatedSymbols &IS,
+                        const CallEvent *Call,
+                        ArrayRef<SVal> ConstValues) const;
 };
 
 //===----------------------------------------------------------------------===//
@@ -611,22 +644,24 @@ inline ProgramStateRef ProgramState::assume(DefinedOrUnknownSVal Cond,
                                       bool Assumption) const {
   if (Cond.isUnknown())
     return this;
-  
-  return getStateManager().ConstraintMgr->assume(this, cast<DefinedSVal>(Cond),
-                                                 Assumption);
+
+  return getStateManager().ConstraintMgr
+      ->assume(this, Cond.castAs<DefinedSVal>(), Assumption);
 }
   
 inline std::pair<ProgramStateRef , ProgramStateRef >
 ProgramState::assume(DefinedOrUnknownSVal Cond) const {
   if (Cond.isUnknown())
     return std::make_pair(this, this);
-  
-  return getStateManager().ConstraintMgr->assumeDual(this,
-                                                     cast<DefinedSVal>(Cond));
+
+  return getStateManager().ConstraintMgr
+      ->assumeDual(this, Cond.castAs<DefinedSVal>());
 }
 
 inline ProgramStateRef ProgramState::bindLoc(SVal LV, SVal V) const {
-  return !isa<Loc>(LV) ? this : bindLoc(cast<Loc>(LV), V);
+  if (Optional<Loc> L = LV.getAs<Loc>())
+    return bindLoc(*L, V);
+  return this;
 }
 
 inline Loc ProgramState::getLValue(const VarDecl *VD,
@@ -660,7 +695,7 @@ inline SVal ProgramState::getLValue(const IndirectFieldDecl *D,
 }
 
 inline SVal ProgramState::getLValue(QualType ElementType, SVal Idx, SVal Base) const{
-  if (NonLoc *N = dyn_cast<NonLoc>(&Idx))
+  if (Optional<NonLoc> N = Idx.getAs<NonLoc>())
     return getStateManager().StoreMgr->getLValueElement(ElementType, *N, Base);
   return UnknownVal();
 }
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/ProgramStateTrait.h b/include/clang/StaticAnalyzer/Core/PathSensitive/ProgramStateTrait.h
index ea2a852..eb52ae4 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/ProgramStateTrait.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/ProgramStateTrait.h
@@ -18,6 +18,8 @@
 #ifndef LLVM_CLANG_GR_PROGRAMSTATETRAIT_H
 #define LLVM_CLANG_GR_PROGRAMSTATETRAIT_H
 
+#include "llvm/Support/DataTypes.h"
+
 namespace llvm {
   class BumpPtrAllocator;
   template <typename K, typename D, typename I> class ImmutableMap;
@@ -165,7 +167,7 @@ namespace ento {
     }
 
     static inline void *MakeVoidPtr(data_type D) {
-      return  (void*) D.getInternalPointer();
+      return const_cast<llvm::ImmutableListImpl<T> *>(D.getInternalPointer());
     }
 
     static inline context_type MakeContext(void *p) {
@@ -221,7 +223,20 @@ namespace ento {
     }
   };
 
-} // end GR namespace
+  // Partial specialization for const void *.
+  template <> struct ProgramStatePartialTrait<const void *> {
+    typedef const void *data_type;
+
+    static inline data_type MakeData(void * const *p) {
+      return p ? *p : data_type();
+    }
+
+    static inline void *MakeVoidPtr(data_type d) {
+      return const_cast<void *>(d);
+    }
+  };
+
+} // end ento namespace
 
 } // end clang namespace
 
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/SValBuilder.h b/include/clang/StaticAnalyzer/Core/PathSensitive/SValBuilder.h
index 5d72e73..f7e49a3 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/SValBuilder.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/SValBuilder.h
@@ -17,11 +17,10 @@
 
 #include "clang/AST/ASTContext.h"
 #include "clang/AST/Expr.h"
-#include "clang/AST/ExprCXX.h"
 #include "clang/AST/ExprObjC.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/BasicValueFactory.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/MemRegion.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h"
 
 namespace clang {
 
@@ -124,7 +123,7 @@ public:
   ProgramStateManager &getStateManager() { return StateMgr; }
   
   QualType getConditionType() const {
-    return  getContext().IntTy;
+    return Context.getLangOpts().CPlusPlus ? Context.BoolTy : Context.IntTy;
   }
   
   QualType getArrayIndexType() const {
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/SVals.h b/include/clang/StaticAnalyzer/Core/PathSensitive/SVals.h
index c2134cf..1c5519e 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/SVals.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/SVals.h
@@ -16,8 +16,8 @@
 #define LLVM_CLANG_GR_RVALUE_H
 
 #include "clang/Basic/LLVM.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/SymbolManager.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState_Fwd.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/SymbolManager.h"
 #include "llvm/ADT/ImmutableList.h"
 
 //==------------------------------------------------------------------------==//
@@ -33,7 +33,7 @@ class LazyCompoundValData;
 class ProgramState;
 class BasicValueFactory;
 class MemRegion;
-class TypedRegion;
+class TypedValueRegion;
 class MemRegionManager;
 class ProgramStateManager;
 class SValBuilder;
@@ -69,6 +69,29 @@ protected:
 public:
   explicit SVal() : Data(0), Kind(0) {}
 
+  /// \brief Convert to the specified SVal type, asserting that this SVal is of
+  /// the desired type.
+  template<typename T>
+  T castAs() const {
+    assert(T::isKind(*this));
+    T t;
+    SVal& sv = t;
+    sv = *this;
+    return t;
+  }
+
+  /// \brief Convert to the specified SVal type, returning None if this SVal is
+  /// not of the desired type.
+  template<typename T>
+  Optional<T> getAs() const {
+    if (!T::isKind(*this))
+      return None;
+    T t;
+    SVal& sv = t;
+    sv = *this;
+    return t;
+  }
+
   /// BufferTy - A temporary buffer to hold a set of SVals.
   typedef SmallVector<SVal,5> BufferTy;
 
@@ -161,29 +184,32 @@ class UndefinedVal : public SVal {
 public:
   UndefinedVal() : SVal(UndefinedKind) {}
 
-  static inline bool classof(const SVal* V) {
-    return V->getBaseKind() == UndefinedKind;
+private:
+  friend class SVal;
+  static bool isKind(const SVal& V) {
+    return V.getBaseKind() == UndefinedKind;
   }
 };
 
 class DefinedOrUnknownSVal : public SVal {
 private:
-  // Do not implement.  We want calling these methods to be a compiler
-  // error since they are tautologically false.
-  bool isUndef() const;
-  bool isValid() const;
+  // We want calling these methods to be a compiler error since they are
+  // tautologically false.
+  bool isUndef() const LLVM_DELETED_FUNCTION;
+  bool isValid() const LLVM_DELETED_FUNCTION;
   
 protected:
+  DefinedOrUnknownSVal() {}
   explicit DefinedOrUnknownSVal(const void *d, bool isLoc, unsigned ValKind)
     : SVal(d, isLoc, ValKind) {}
   
   explicit DefinedOrUnknownSVal(BaseKind k, void *D = NULL)
     : SVal(k, D) {}
   
-public:
-    // Implement isa<T> support.
-  static inline bool classof(const SVal *V) {
-    return !V->isUndef();
+private:
+  friend class SVal;
+  static bool isKind(const SVal& V) {
+    return !V.isUndef();
   }
 };
   
@@ -191,61 +217,79 @@ class UnknownVal : public DefinedOrUnknownSVal {
 public:
   explicit UnknownVal() : DefinedOrUnknownSVal(UnknownKind) {}
   
-  static inline bool classof(const SVal *V) {
-    return V->getBaseKind() == UnknownKind;
+private:
+  friend class SVal;
+  static bool isKind(const SVal &V) {
+    return V.getBaseKind() == UnknownKind;
   }
 };
 
 class DefinedSVal : public DefinedOrUnknownSVal {
 private:
-  // Do not implement.  We want calling these methods to be a compiler
-  // error since they are tautologically true/false.
-  bool isUnknown() const;
-  bool isUnknownOrUndef() const;
-  bool isValid() const;  
+  // We want calling these methods to be a compiler error since they are
+  // tautologically true/false.
+  bool isUnknown() const LLVM_DELETED_FUNCTION;
+  bool isUnknownOrUndef() const LLVM_DELETED_FUNCTION;
+  bool isValid() const LLVM_DELETED_FUNCTION;
 protected:
+  DefinedSVal() {}
   explicit DefinedSVal(const void *d, bool isLoc, unsigned ValKind)
     : DefinedOrUnknownSVal(d, isLoc, ValKind) {}
-public:
-  // Implement isa<T> support.
-  static inline bool classof(const SVal *V) {
-    return !V->isUnknownOrUndef();
+private:
+  friend class SVal;
+  static bool isKind(const SVal& V) {
+    return !V.isUnknownOrUndef();
+  }
+};
+
+
+/// \brief Represents an SVal that is guaranteed to not be UnknownVal.
+class KnownSVal : public SVal {
+  KnownSVal() {}
+  friend class SVal;
+  static bool isKind(const SVal &V) {
+    return !V.isUnknown();
   }
+public:
+  KnownSVal(const DefinedSVal &V) : SVal(V) {}
+  KnownSVal(const UndefinedVal &V) : SVal(V) {}
 };
 
 class NonLoc : public DefinedSVal {
 protected:
+  NonLoc() {}
   explicit NonLoc(unsigned SubKind, const void *d)
     : DefinedSVal(d, false, SubKind) {}
 
 public:
   void dumpToStream(raw_ostream &Out) const;
 
-  // Implement isa<T> support.
-  static inline bool classof(const SVal* V) {
-    return V->getBaseKind() == NonLocKind;
+private:
+  friend class SVal;
+  static bool isKind(const SVal& V) {
+    return V.getBaseKind() == NonLocKind;
   }
 };
 
 class Loc : public DefinedSVal {
 protected:
+  Loc() {}
   explicit Loc(unsigned SubKind, const void *D)
   : DefinedSVal(const_cast<void*>(D), true, SubKind) {}
 
 public:
   void dumpToStream(raw_ostream &Out) const;
 
-  Loc(const Loc& X) : DefinedSVal(X.Data, true, X.getSubKind()) {}
-
-  // Implement isa<T> support.
-  static inline bool classof(const SVal* V) {
-    return V->getBaseKind() == LocKind;
-  }
-
   static inline bool isLocType(QualType T) {
     return T->isAnyPointerType() || T->isBlockPointerType() || 
            T->isReferenceType();
   }
+
+private:
+  friend class SVal;
+  static bool isKind(const SVal& V) {
+    return V.getBaseKind() == LocKind;
+  }
 };
 
 //==------------------------------------------------------------------------==//
@@ -266,17 +310,20 @@ public:
     return (const SymExpr*) Data;
   }
 
-  bool isExpression() {
+  bool isExpression() const {
     return !isa<SymbolData>(getSymbol());
   }
 
-  static inline bool classof(const SVal* V) {
-    return V->getBaseKind() == NonLocKind &&
-           V->getSubKind() == SymbolValKind;
+private:
+  friend class SVal;
+  SymbolVal() {}
+  static bool isKind(const SVal& V) {
+    return V.getBaseKind() == NonLocKind &&
+           V.getSubKind() == SymbolValKind;
   }
 
-  static inline bool classof(const NonLoc* V) {
-    return V->getSubKind() == SymbolValKind;
+  static bool isKind(const NonLoc& V) {
+    return V.getSubKind() == SymbolValKind;
   }
 };
 
@@ -297,38 +344,40 @@ public:
 
   ConcreteInt evalMinus(SValBuilder &svalBuilder) const;
 
-  // Implement isa<T> support.
-  static inline bool classof(const SVal* V) {
-    return V->getBaseKind() == NonLocKind &&
-           V->getSubKind() == ConcreteIntKind;
+private:
+  friend class SVal;
+  ConcreteInt() {}
+  static bool isKind(const SVal& V) {
+    return V.getBaseKind() == NonLocKind &&
+           V.getSubKind() == ConcreteIntKind;
   }
 
-  static inline bool classof(const NonLoc* V) {
-    return V->getSubKind() == ConcreteIntKind;
+  static bool isKind(const NonLoc& V) {
+    return V.getSubKind() == ConcreteIntKind;
   }
 };
 
 class LocAsInteger : public NonLoc {
   friend class ento::SValBuilder;
 
-  explicit LocAsInteger(const std::pair<SVal, uintptr_t>& data) :
-    NonLoc(LocAsIntegerKind, &data) {
-      assert (isa<Loc>(data.first));
-    }
+  explicit LocAsInteger(const std::pair<SVal, uintptr_t> &data)
+      : NonLoc(LocAsIntegerKind, &data) {
+    assert (data.first.getAs<Loc>());
+  }
 
 public:
 
   Loc getLoc() const {
     const std::pair<SVal, uintptr_t> *D =
       static_cast<const std::pair<SVal, uintptr_t> *>(Data);
-    return cast<Loc>(D->first);
+    return D->first.castAs<Loc>();
   }
 
-  const Loc& getPersistentLoc() const {
+  Loc getPersistentLoc() const {
     const std::pair<SVal, uintptr_t> *D =
       static_cast<const std::pair<SVal, uintptr_t> *>(Data);
     const SVal& V = D->first;
-    return cast<Loc>(V);
+    return V.castAs<Loc>();
   }
 
   unsigned getNumBits() const {
@@ -337,14 +386,16 @@ public:
     return D->second;
   }
 
-  // Implement isa<T> support.
-  static inline bool classof(const SVal* V) {
-    return V->getBaseKind() == NonLocKind &&
-           V->getSubKind() == LocAsIntegerKind;
+private:
+  friend class SVal;
+  LocAsInteger() {}
+  static bool isKind(const SVal& V) {
+    return V.getBaseKind() == NonLocKind &&
+           V.getSubKind() == LocAsIntegerKind;
   }
 
-  static inline bool classof(const NonLoc* V) {
-    return V->getSubKind() == LocAsIntegerKind;
+  static bool isKind(const NonLoc& V) {
+    return V.getSubKind() == LocAsIntegerKind;
   }
 };
 
@@ -362,12 +413,15 @@ public:
   iterator begin() const;
   iterator end() const;
 
-  static bool classof(const SVal* V) {
-    return V->getBaseKind() == NonLocKind && V->getSubKind() == CompoundValKind;
+private:
+  friend class SVal;
+  CompoundVal() {}
+  static bool isKind(const SVal& V) {
+    return V.getBaseKind() == NonLocKind && V.getSubKind() == CompoundValKind;
   }
 
-  static bool classof(const NonLoc* V) {
-    return V->getSubKind() == CompoundValKind;
+  static bool isKind(const NonLoc& V) {
+    return V.getSubKind() == CompoundValKind;
   }
 };
 
@@ -381,14 +435,17 @@ public:
     return static_cast<const LazyCompoundValData*>(Data);
   }
   const void *getStore() const;
-  const TypedRegion *getRegion() const;
+  const TypedValueRegion *getRegion() const;
 
-  static bool classof(const SVal *V) {
-    return V->getBaseKind() == NonLocKind &&
-           V->getSubKind() == LazyCompoundValKind;
+private:
+  friend class SVal;
+  LazyCompoundVal() {}
+  static bool isKind(const SVal& V) {
+    return V.getBaseKind() == NonLocKind &&
+           V.getSubKind() == LazyCompoundValKind;
   }
-  static bool classof(const NonLoc *V) {
-    return V->getSubKind() == LazyCompoundValKind;
+  static bool isKind(const NonLoc& V) {
+    return V.getSubKind() == LazyCompoundValKind;
   }
 };
 
@@ -410,12 +467,15 @@ public:
     return static_cast<const LabelDecl*>(Data);
   }
 
-  static inline bool classof(const SVal* V) {
-    return V->getBaseKind() == LocKind && V->getSubKind() == GotoLabelKind;
+private:
+  friend class SVal;
+  GotoLabel() {}
+  static bool isKind(const SVal& V) {
+    return V.getBaseKind() == LocKind && V.getSubKind() == GotoLabelKind;
   }
 
-  static inline bool classof(const Loc* V) {
-    return V->getSubKind() == GotoLabelKind;
+  static bool isKind(const Loc& V) {
+    return V.getSubKind() == GotoLabelKind;
   }
 };
 
@@ -434,7 +494,7 @@ public:
 
   template <typename REGION>
   const REGION* getRegionAs() const {
-    return llvm::dyn_cast<REGION>(getRegion());
+    return dyn_cast<REGION>(getRegion());
   }
 
   inline bool operator==(const MemRegionVal& R) const {
@@ -445,14 +505,16 @@ public:
     return getRegion() != R.getRegion();
   }
 
-  // Implement isa<T> support.
-  static inline bool classof(const SVal* V) {
-    return V->getBaseKind() == LocKind &&
-           V->getSubKind() == MemRegionKind;
+private:
+  friend class SVal;
+  MemRegionVal() {}
+  static bool isKind(const SVal& V) {
+    return V.getBaseKind() == LocKind &&
+           V.getSubKind() == MemRegionKind;
   }
 
-  static inline bool classof(const Loc* V) {
-    return V->getSubKind() == MemRegionKind;
+  static bool isKind(const Loc& V) {
+    return V.getSubKind() == MemRegionKind;
   }
 };
 
@@ -468,19 +530,22 @@ public:
   SVal evalBinOp(BasicValueFactory& BasicVals, BinaryOperator::Opcode Op,
                  const ConcreteInt& R) const;
 
-  // Implement isa<T> support.
-  static inline bool classof(const SVal* V) {
-    return V->getBaseKind() == LocKind &&
-           V->getSubKind() == ConcreteIntKind;
+private:
+  friend class SVal;
+  ConcreteInt() {}
+  static bool isKind(const SVal& V) {
+    return V.getBaseKind() == LocKind &&
+           V.getSubKind() == ConcreteIntKind;
   }
 
-  static inline bool classof(const Loc* V) {
-    return V->getSubKind() == ConcreteIntKind;
+  static bool isKind(const Loc& V) {
+    return V.getSubKind() == ConcreteIntKind;
   }
 };
 
 } // end ento::loc namespace
-} // end GR namespace
+
+} // end ento namespace
 
 } // end clang namespace
 
@@ -491,6 +556,11 @@ static inline raw_ostream &operator<<(raw_ostream &os,
   return os;
 }
 
+template <typename T> struct isPodLike;
+template <> struct isPodLike<clang::ento::SVal> {
+  static const bool value = true;
+};
+
 } // end llvm namespace
 
 #endif
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/Store.h b/include/clang/StaticAnalyzer/Core/PathSensitive/Store.h
index 979546b..bbfd579 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/Store.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/Store.h
@@ -14,9 +14,9 @@
 #ifndef LLVM_CLANG_GR_STORE_H
 #define LLVM_CLANG_GR_STORE_H
 
-#include "clang/StaticAnalyzer/Core/PathSensitive/StoreRef.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/MemRegion.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/SValBuilder.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/StoreRef.h"
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/Optional.h"
 
@@ -35,6 +35,8 @@ class ProgramState;
 class ProgramStateManager;
 class ScanReachableSymbols;
 
+typedef llvm::DenseSet<SymbolRef> InvalidatedSymbols;
+
 class StoreManager {
 protected:
   SValBuilder &svalBuilder;
@@ -134,7 +136,8 @@ public:
   SVal evalDerivedToBase(SVal Derived, const CXXBasePath &CastPath);
 
   /// Evaluates a derived-to-base cast through a single level of derivation.
-  SVal evalDerivedToBase(SVal Derived, QualType DerivedPtrType);
+  SVal evalDerivedToBase(SVal Derived, QualType DerivedPtrType,
+                         bool IsVirtual);
 
   /// \brief Evaluates C++ dynamic_cast cast.
   /// The callback may result in the following 3 scenarios:
@@ -168,7 +171,6 @@ public:
   /// associated with the object is recycled.
   virtual void decrementReferenceCount(Store store) {}
 
-  typedef llvm::DenseSet<SymbolRef> InvalidatedSymbols;
   typedef SmallVector<const MemRegion *, 8> InvalidatedRegions;
 
   /// invalidateRegions - Clears out the specified regions from the store,
@@ -176,26 +178,40 @@ public:
   ///  invalidate additional regions that may have changed based on accessing
   ///  the given regions. Optionally, invalidates non-static globals as well.
   /// \param[in] store The initial store
-  /// \param[in] Regions The regions to invalidate.
+  /// \param[in] Values The values to invalidate.
+  /// \param[in] ConstValues The values to invalidate; these are known to be
+  ///   const, so only regions accesible from them should be invalidated.
   /// \param[in] E The current statement being evaluated. Used to conjure
   ///   symbols to mark the values of invalidated regions.
   /// \param[in] Count The current block count. Used to conjure
   ///   symbols to mark the values of invalidated regions.
-  /// \param[in,out] IS A set to fill with any symbols that are no longer
-  ///   accessible. Pass \c NULL if this information will not be used.
   /// \param[in] Call The call expression which will be used to determine which
   ///   globals should get invalidated.
+  /// \param[in,out] IS A set to fill with any symbols that are no longer
+  ///   accessible. Pass \c NULL if this information will not be used.
+  /// \param[in,out] ConstIS A set to fill with any symbols corresponding to
+  ///   the ConstValues.
+  /// \param[in,out] InvalidatedTopLevel A vector to fill with regions
+  ////  explicitely being invalidated. Pass \c NULL if this
+  ///   information will not be used.
+  /// \param[in,out] InvalidatedTopLevelConst A vector to fill with const 
+  ////  regions explicitely being invalidated. Pass \c NULL if this
+  ///   information will not be used.
   /// \param[in,out] Invalidated A vector to fill with any regions being
   ///   invalidated. This should include any regions explicitly invalidated
   ///   even if they do not currently have bindings. Pass \c NULL if this
   ///   information will not be used.
   virtual StoreRef invalidateRegions(Store store,
-                                     ArrayRef<const MemRegion *> Regions,
-                                     const Expr *E, unsigned Count,
-                                     const LocationContext *LCtx,
-                                     InvalidatedSymbols &IS,
-                                     const CallEvent *Call,
-                                     InvalidatedRegions *Invalidated) = 0;
+                                  ArrayRef<SVal> Values,
+                                  ArrayRef<SVal> ConstValues,
+                                  const Expr *E, unsigned Count,
+                                  const LocationContext *LCtx,
+                                  const CallEvent *Call,
+                                  InvalidatedSymbols &IS,
+                                  InvalidatedSymbols &ConstIS,
+                                  InvalidatedRegions *InvalidatedTopLevel,
+                                  InvalidatedRegions *InvalidatedTopLevelConst,
+                                  InvalidatedRegions *Invalidated) = 0;
 
   /// enterStackFrame - Let the StoreManager to do something when execution
   /// engine is about to execute into a callee.
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/SubEngine.h b/include/clang/StaticAnalyzer/Core/PathSensitive/SubEngine.h
index 1e71077..d410063 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/SubEngine.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/SubEngine.h
@@ -72,6 +72,15 @@ public:
                              const CFGBlock *DstT,
                              const CFGBlock *DstF) = 0;
 
+  /// Called by CoreEngine.  Used to processing branching behavior
+  /// at static initalizers.
+  virtual void processStaticInitializer(const DeclStmt *DS,
+                                        NodeBuilderContext& BuilderCtx,
+                                        ExplodedNode *Pred,
+                                        ExplodedNodeSet &Dst,
+                                        const CFGBlock *DstT,
+                                        const CFGBlock *DstF) = 0;
+
   /// Called by CoreEngine.  Used to generate successor
   /// nodes by processing the 'effects' of a computed goto jump.
   virtual void processIndirectGoto(IndirectGotoNodeBuilder& builder) = 0;
@@ -104,7 +113,7 @@ public:
   /// made to the store. Used to update checkers that track region values.
   virtual ProgramStateRef 
   processRegionChanges(ProgramStateRef state,
-                       const StoreManager::InvalidatedSymbols *invalidated,
+                       const InvalidatedSymbols *invalidated,
                        ArrayRef<const MemRegion *> ExplicitRegions,
                        ArrayRef<const MemRegion *> Regions,
                        const CallEvent *Call) = 0;
@@ -116,6 +125,17 @@ public:
     return processRegionChanges(state, 0, MR, MR, 0);
   }
 
+  virtual ProgramStateRef
+  processPointerEscapedOnBind(ProgramStateRef State, SVal Loc, SVal Val) = 0;
+
+  virtual ProgramStateRef
+  notifyCheckersOfPointerEscape(ProgramStateRef State,
+                           const InvalidatedSymbols *Invalidated,
+                           ArrayRef<const MemRegion *> ExplicitRegions,
+                           ArrayRef<const MemRegion *> Regions,
+                           const CallEvent *Call,
+                           bool IsConst = false) = 0;
+
   /// printState - Called by ProgramStateManager to print checker-specific data.
   virtual void printState(raw_ostream &Out, ProgramStateRef State,
                           const char *NL, const char *Sep) = 0;
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/SymbolManager.h b/include/clang/StaticAnalyzer/Core/PathSensitive/SymbolManager.h
index 873f773..56afca2 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/SymbolManager.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/SymbolManager.h
@@ -20,10 +20,10 @@
 #include "clang/Analysis/AnalysisContext.h"
 #include "clang/Basic/LLVM.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/StoreRef.h"
-#include "llvm/Support/DataTypes.h"
-#include "llvm/ADT/FoldingSet.h"
-#include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/DenseMap.h"
+#include "llvm/ADT/DenseSet.h"
+#include "llvm/ADT/FoldingSet.h"
+#include "llvm/Support/DataTypes.h"
 
 namespace llvm {
 class BumpPtrAllocator;
@@ -96,7 +96,7 @@ public:
 };
 
 typedef const SymExpr* SymbolRef;
-typedef llvm::SmallVector<SymbolRef, 2> SymbolRefSmallVectorTy;
+typedef SmallVector<SymbolRef, 2> SymbolRefSmallVectorTy;
 
 typedef unsigned SymbolID;
 /// \brief A symbol representing data which can be stored in a memory location
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/TaintManager.h b/include/clang/StaticAnalyzer/Core/PathSensitive/TaintManager.h
index c274cea..4c58d4b 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/TaintManager.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/TaintManager.h
@@ -14,7 +14,11 @@
 #ifndef LLVM_CLANG_TAINTMANAGER_H
 #define LLVM_CLANG_TAINTMANAGER_H
 
+#include "clang/StaticAnalyzer/Core/BugReporter/PathDiagnostic.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/ProgramStateTrait.h"
 #include "clang/StaticAnalyzer/Core/PathSensitive/TaintTag.h"
+#include "llvm/ADT/ImmutableMap.h"
 
 namespace clang {
 namespace ento {
diff --git a/include/clang/StaticAnalyzer/Core/PathSensitive/WorkList.h b/include/clang/StaticAnalyzer/Core/PathSensitive/WorkList.h
index 51aa753..d12a151 100644
--- a/include/clang/StaticAnalyzer/Core/PathSensitive/WorkList.h
+++ b/include/clang/StaticAnalyzer/Core/PathSensitive/WorkList.h
@@ -16,7 +16,8 @@
 #define LLVM_CLANG_GR_WORKLIST
 
 #include "clang/StaticAnalyzer/Core/PathSensitive/BlockCounter.h"
-#include <cstddef>
+#include "clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h"
+#include <cassert>
 
 namespace clang {
   
@@ -24,9 +25,6 @@ class CFGBlock;
 
 namespace ento {
 
-class ExplodedNode;
-class ExplodedNodeImpl;
-
 class WorkListUnit {
   ExplodedNode *node;
   BlockCounter counter;
diff --git a/include/clang/Tooling/CommonOptionsParser.h b/include/clang/Tooling/CommonOptionsParser.h
index a1bad12..6775934 100644
--- a/include/clang/Tooling/CommonOptionsParser.h
+++ b/include/clang/Tooling/CommonOptionsParser.h
@@ -53,8 +53,8 @@ namespace tooling {
 ///
 /// int main(int argc, const char **argv) {
 ///   CommonOptionsParser OptionsParser(argc, argv);
-///   ClangTool Tool(OptionsParser.GetCompilations(),
-///                  OptionsParser.GetSourcePathListi());
+///   ClangTool Tool(OptionsParser.getCompilations(),
+///                  OptionsParser.getSourcePathListi());
 ///   return Tool.run(newFrontendActionFactory<clang::SyntaxOnlyAction>());
 /// }
 /// \endcode
@@ -67,19 +67,19 @@ public:
   CommonOptionsParser(int &argc, const char **argv);
 
   /// Returns a reference to the loaded compilations database.
-  CompilationDatabase &GetCompilations() {
+  CompilationDatabase &getCompilations() {
     return *Compilations;
   }
 
   /// Returns a list of source file paths to process.
-  std::vector<std::string> GetSourcePathList() {
+  std::vector<std::string> getSourcePathList() {
     return SourcePathList;
   }
 
   static const char *const HelpMessage;
 
 private:
-  llvm::OwningPtr<CompilationDatabase> Compilations;
+  OwningPtr<CompilationDatabase> Compilations;
   std::vector<std::string> SourcePathList;
 };
 
diff --git a/include/clang/Tooling/CompilationDatabase.h b/include/clang/Tooling/CompilationDatabase.h
index a40bffe..7a8054f 100644
--- a/include/clang/Tooling/CompilationDatabase.h
+++ b/include/clang/Tooling/CompilationDatabase.h
@@ -33,7 +33,6 @@
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/StringRef.h"
 #include "llvm/ADT/Twine.h"
-
 #include <string>
 #include <vector>
 
@@ -106,6 +105,10 @@ public:
 
   /// \brief Returns the list of all files available in the compilation database.
   virtual std::vector<std::string> getAllFiles() const = 0;
+
+  /// \brief Returns all compile commands for all the files in the compilation
+  /// database.
+  virtual std::vector<CompileCommand> getAllCompileCommands() const = 0;
 };
 
 /// \brief Interface for compilation database plugins.
@@ -149,7 +152,7 @@ public:
   /// The argument list is meant to be compatible with normal llvm command line
   /// parsing in main methods.
   /// int main(int argc, char **argv) {
-  ///   llvm::OwningPtr<FixedCompilationDatabase> Compilations(
+  ///   OwningPtr<FixedCompilationDatabase> Compilations(
   ///     FixedCompilationDatabase::loadFromCommandLine(argc, argv));
   ///   cl::ParseCommandLineOptions(argc, argv);
   ///   ...
@@ -181,6 +184,12 @@ public:
   /// Note: This is always an empty list for the fixed compilation database.
   virtual std::vector<std::string> getAllFiles() const;
 
+  /// \brief Returns all compile commands for all the files in the compilation
+  /// database.
+  ///
+  /// Note: This is always an empty list for the fixed compilation database.
+  virtual std::vector<CompileCommand> getAllCompileCommands() const;
+
 private:
   /// This is built up to contain a single entry vector to be returned from
   /// getCompileCommands after adding the positional argument.
diff --git a/include/clang/Tooling/FileMatchTrie.h b/include/clang/Tooling/FileMatchTrie.h
index ff988be..e531854 100644
--- a/include/clang/Tooling/FileMatchTrie.h
+++ b/include/clang/Tooling/FileMatchTrie.h
@@ -18,7 +18,6 @@
 #include "clang/Basic/LLVM.h"
 #include "llvm/ADT/OwningPtr.h"
 #include "llvm/ADT/StringRef.h"
-
 #include <string>
 #include <vector>
 
@@ -77,7 +76,7 @@ public:
   /// matches, an empty \c StringRef is returned and a corresponding message
   /// written to 'Error'.
   StringRef findEquivalent(StringRef FileName,
-                           llvm::raw_ostream &Error) const;
+                           raw_ostream &Error) const;
 private:
   FileMatchTrieNode *Root;
   OwningPtr<PathComparator> Comparator;
diff --git a/include/clang/Tooling/JSONCompilationDatabase.h b/include/clang/Tooling/JSONCompilationDatabase.h
index d62ab5c..e3f149b 100644
--- a/include/clang/Tooling/JSONCompilationDatabase.h
+++ b/include/clang/Tooling/JSONCompilationDatabase.h
@@ -75,6 +75,10 @@ public:
   /// These are the 'file' entries of the JSON objects.
   virtual std::vector<std::string> getAllFiles() const;
 
+  /// \brief Returns all compile commands for all the files in the compilation
+  /// database.
+  virtual std::vector<CompileCommand> getAllCompileCommands() const;
+
 private:
   /// \brief Constructs a JSON compilation database on a memory buffer.
   JSONCompilationDatabase(llvm::MemoryBuffer *Database)
@@ -91,12 +95,16 @@ private:
   typedef std::pair<llvm::yaml::ScalarNode*,
                     llvm::yaml::ScalarNode*> CompileCommandRef;
 
+  /// \brief Converts the given array of CompileCommandRefs to CompileCommands.
+  void getCommands(ArrayRef<CompileCommandRef> CommandsRef,
+                   std::vector<CompileCommand> &Commands) const;
+
   // Maps file paths to the compile command lines for that file.
   llvm::StringMap< std::vector<CompileCommandRef> > IndexByFile;
 
   FileMatchTrie MatchTrie;
 
-  llvm::OwningPtr<llvm::MemoryBuffer> Database;
+  OwningPtr<llvm::MemoryBuffer> Database;
   llvm::SourceMgr SM;
   llvm::yaml::Stream YAMLStream;
 };
diff --git a/include/clang/Tooling/Refactoring.h b/include/clang/Tooling/Refactoring.h
index aaffc1a..079ce74 100644
--- a/include/clang/Tooling/Refactoring.h
+++ b/include/clang/Tooling/Refactoring.h
@@ -19,9 +19,9 @@
 #ifndef LLVM_CLANG_TOOLING_REFACTORING_H
 #define LLVM_CLANG_TOOLING_REFACTORING_H
 
-#include "llvm/ADT/StringRef.h"
 #include "clang/Basic/SourceLocation.h"
 #include "clang/Tooling/Tooling.h"
+#include "llvm/ADT/StringRef.h"
 #include <set>
 #include <string>
 
@@ -47,22 +47,22 @@ public:
   /// \param FilePath A source file accessible via a SourceManager.
   /// \param Offset The byte offset of the start of the range in the file.
   /// \param Length The length of the range in bytes.
-  Replacement(llvm::StringRef FilePath, unsigned Offset,
-              unsigned Length, llvm::StringRef ReplacementText);
+  Replacement(StringRef FilePath, unsigned Offset,
+              unsigned Length, StringRef ReplacementText);
 
   /// \brief Creates a Replacement of the range [Start, Start+Length) with
   /// ReplacementText.
   Replacement(SourceManager &Sources, SourceLocation Start, unsigned Length,
-              llvm::StringRef ReplacementText);
+              StringRef ReplacementText);
 
   /// \brief Creates a Replacement of the given range with ReplacementText.
   Replacement(SourceManager &Sources, const CharSourceRange &Range,
-              llvm::StringRef ReplacementText);
+              StringRef ReplacementText);
 
   /// \brief Creates a Replacement of the node with ReplacementText.
   template <typename Node>
   Replacement(SourceManager &Sources, const Node &NodeToReplace,
-              llvm::StringRef ReplacementText);
+              StringRef ReplacementText);
 
   /// \brief Returns whether this replacement can be applied to a file.
   ///
@@ -91,9 +91,9 @@ public:
 
  private:
   void setFromSourceLocation(SourceManager &Sources, SourceLocation Start,
-                             unsigned Length, llvm::StringRef ReplacementText);
+                             unsigned Length, StringRef ReplacementText);
   void setFromSourceRange(SourceManager &Sources, const CharSourceRange &Range,
-                          llvm::StringRef ReplacementText);
+                          StringRef ReplacementText);
 
   std::string FilePath;
   unsigned Offset;
@@ -105,41 +105,54 @@ public:
 /// FIXME: Change to a vector and deduplicate in the RefactoringTool.
 typedef std::set<Replacement, Replacement::Less> Replacements;
 
-/// \brief Apply all replacements on the Rewriter.
+/// \brief Apply all replacements in \p Replaces to the Rewriter \p Rewrite.
+///
+/// Replacement applications happen independently of the success of
+/// other applications.
 ///
-/// If at least one Apply returns false, ApplyAll returns false. Every
-/// Apply will be executed independently of the result of other
-/// Apply operations.
+/// \returns true if all replacements apply. false otherwise.
 bool applyAllReplacements(Replacements &Replaces, Rewriter &Rewrite);
 
 /// \brief A tool to run refactorings.
 ///
-/// This is a refactoring specific version of \see ClangTool.
-/// All text replacements added to getReplacements() during the run of the
-/// tool will be applied and saved after all translation units have been
-/// processed.
-class RefactoringTool {
+/// This is a refactoring specific version of \see ClangTool. FrontendActions
+/// passed to run() and runAndSave() should add replacements to
+/// getReplacements().
+class RefactoringTool : public ClangTool {
 public:
   /// \see ClangTool::ClangTool.
   RefactoringTool(const CompilationDatabase &Compilations,
                   ArrayRef<std::string> SourcePaths);
 
-  /// \brief Returns a set of replacements. All replacements added during the
-  /// run of the tool will be applied after all translation units have been
-  /// processed.
+  /// \brief Returns the set of replacements to which replacements should
+  /// be added during the run of the tool.
   Replacements &getReplacements();
 
-  /// \see ClangTool::run.
-  int run(FrontendActionFactory *ActionFactory);
+  /// \brief Call run(), apply all generated replacements, and immediately save
+  /// the results to disk.
+  ///
+  /// \returns 0 upon success. Non-zero upon failure.
+  int runAndSave(FrontendActionFactory *ActionFactory);
+
+  /// \brief Apply all stored replacements to the given Rewriter.
+  ///
+  /// Replacement applications happen independently of the success of other
+  /// applications.
+  ///
+  /// \returns true if all replacements apply. false otherwise.
+  bool applyAllReplacements(Rewriter &Rewrite);
+
+private:
+  /// \brief Write all refactored files to disk.
+  int saveRewrittenFiles(Rewriter &Rewrite);
 
 private:
-  ClangTool Tool;
   Replacements Replace;
 };
 
 template <typename Node>
 Replacement::Replacement(SourceManager &Sources, const Node &NodeToReplace,
-                         llvm::StringRef ReplacementText) {
+                         StringRef ReplacementText) {
   const CharSourceRange Range =
       CharSourceRange::getTokenRange(NodeToReplace->getSourceRange());
   setFromSourceRange(Sources, Range, ReplacementText);
@@ -149,4 +162,3 @@ Replacement::Replacement(SourceManager &Sources, const Node &NodeToReplace,
 } // end namespace clang
 
 #endif // end namespace LLVM_CLANG_TOOLING_REFACTORING_H
-
diff --git a/include/clang/Tooling/Tooling.h b/include/clang/Tooling/Tooling.h
index a03bcb1..27e5a0a 100644
--- a/include/clang/Tooling/Tooling.h
+++ b/include/clang/Tooling/Tooling.h
@@ -30,14 +30,14 @@
 #ifndef LLVM_CLANG_TOOLING_TOOLING_H
 #define LLVM_CLANG_TOOLING_TOOLING_H
 
-#include "llvm/ADT/StringMap.h"
-#include "llvm/ADT/Twine.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/LLVM.h"
 #include "clang/Driver/Util.h"
 #include "clang/Frontend/FrontendAction.h"
 #include "clang/Tooling/ArgumentsAdjusters.h"
 #include "clang/Tooling/CompilationDatabase.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/Twine.h"
 #include <string>
 #include <vector>
 
@@ -151,11 +151,10 @@ class ToolInvocation {
 
   bool runInvocation(const char *BinaryName,
                      clang::driver::Compilation *Compilation,
-                     clang::CompilerInvocation *Invocation,
-                     const clang::driver::ArgStringList &CC1Args);
+                     clang::CompilerInvocation *Invocation);
 
   std::vector<std::string> CommandLine;
-  llvm::OwningPtr<FrontendAction> ToolAction;
+  OwningPtr<FrontendAction> ToolAction;
   FileManager *Files;
   // Maps <file name> -> <file content>.
   llvm::StringMap<StringRef> MappedFileContents;
@@ -179,6 +178,8 @@ class ClangTool {
   ClangTool(const CompilationDatabase &Compilations,
             ArrayRef<std::string> SourcePaths);
 
+  virtual ~ClangTool() {}
+
   /// \brief Map a virtual file to be used while running the tool.
   ///
   /// \param FilePath The path at which the content will be mapped.
@@ -195,7 +196,7 @@ class ClangTool {
   /// \param ActionFactory Factory generating the frontend actions. The function
   /// takes ownership of this parameter. A new action is generated for every
   /// processed translation unit.
-  int run(FrontendActionFactory *ActionFactory);
+  virtual int run(FrontendActionFactory *ActionFactory);
 
   /// \brief Returns the file manager used in the tool.
   ///
@@ -210,7 +211,7 @@ class ClangTool {
   // Contains a list of pairs (<file name>, <file content>).
   std::vector< std::pair<StringRef, StringRef> > MappedFileContents;
 
-  llvm::OwningPtr<ArgumentsAdjuster> ArgsAdjuster;
+  OwningPtr<ArgumentsAdjuster> ArgsAdjuster;
 };
 
 template <typename T>
@@ -244,7 +245,7 @@ inline FrontendActionFactory *newFrontendActionFactory(
         : ConsumerFactory(ConsumerFactory), EndCallback(EndCallback) {}
 
       clang::ASTConsumer *CreateASTConsumer(clang::CompilerInstance &,
-                                            llvm::StringRef) {
+                                            StringRef) {
         return ConsumerFactory->newASTConsumer();
       }
author	dim <dim@FreeBSD.org>	2013-04-08 18:45:10 +0000
committer	dim <dim@FreeBSD.org>	2013-04-08 18:45:10 +0000
commit	c72c57c9e9b69944e3e009cd5e209634839581d3 (patch)
tree	4fc2f184c499d106f29a386c452b49e5197bf63d /include/clang
parent	5b20025c30d23d521e12c1f33ec8fa6b821952cd (diff)
download	FreeBSD-src-c72c57c9e9b69944e3e009cd5e209634839581d3.zip FreeBSD-src-c72c57c9e9b69944e3e009cd5e209634839581d3.tar.gz