31 files changed, 1708 insertions, 1003 deletions
diff --git a/contrib/llvm/tools/clang/lib/Frontend/ASTConsumers.cpp b/contrib/llvm/tools/clang/lib/Frontend/ASTConsumers.cpp
index 54a6d47..f53c614 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/ASTConsumers.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/ASTConsumers.cpp
@@ -57,7 +57,8 @@ namespace {
         bool ShowColors = Out.has_colors();
         if (ShowColors)
           Out.changeColor(raw_ostream::BLUE);
-        Out << (Dump ? "Dumping " : "Printing ") << getName(D) << ":\n";
+        Out << ((Dump || DumpLookups) ? "Dumping " : "Printing ") << getName(D)
+            << ":\n";
         if (ShowColors)
           Out.resetColor();
         print(D);
@@ -79,9 +80,13 @@ namespace {
     }
     void print(Decl *D) {
       if (DumpLookups) {
-        if (DeclContext *DC = dyn_cast<DeclContext>(D))
-          DC->dumpLookups(Out);
-        else
+        if (DeclContext *DC = dyn_cast<DeclContext>(D)) {
+          if (DC == DC->getPrimaryContext())
+            DC->dumpLookups(Out, Dump);
+          else
+            Out << "Lookup map is in primary DeclContext "
+                << DC->getPrimaryContext() << "\n";
+        } else
           Out << "Not a DeclContext\n";
       } else if (Dump)
         D->dump(Out);
@@ -118,17 +123,21 @@ namespace {
   };
 } // end anonymous namespace
 
-ASTConsumer *clang::CreateASTPrinter(raw_ostream *Out,
-                                     StringRef FilterString) {
-  return new ASTPrinter(Out, /*Dump=*/ false, FilterString);
+std::unique_ptr<ASTConsumer> clang::CreateASTPrinter(raw_ostream *Out,
+                                                     StringRef FilterString) {
+  return llvm::make_unique<ASTPrinter>(Out, /*Dump=*/false, FilterString);
 }
 
-ASTConsumer *clang::CreateASTDumper(StringRef FilterString, bool DumpLookups) {
-  return new ASTPrinter(nullptr, /*Dump=*/true, FilterString, DumpLookups);
+std::unique_ptr<ASTConsumer> clang::CreateASTDumper(StringRef FilterString,
+                                                    bool DumpDecls,
+                                                    bool DumpLookups) {
+  assert((DumpDecls || DumpLookups) && "nothing to dump");
+  return llvm::make_unique<ASTPrinter>(nullptr, DumpDecls, FilterString,
+                                       DumpLookups);
 }
 
-ASTConsumer *clang::CreateASTDeclNodeLister() {
-  return new ASTDeclNodeLister(nullptr);
+std::unique_ptr<ASTConsumer> clang::CreateASTDeclNodeLister() {
+  return llvm::make_unique<ASTDeclNodeLister>(nullptr);
 }
 
 //===----------------------------------------------------------------------===//
@@ -164,8 +173,9 @@ void ASTViewer::HandleTopLevelSingleDecl(Decl *D) {
   }
 }
 
-
-ASTConsumer *clang::CreateASTViewer() { return new ASTViewer(); }
+std::unique_ptr<ASTConsumer> clang::CreateASTViewer() {
+  return llvm::make_unique<ASTViewer>();
+}
 
 //===----------------------------------------------------------------------===//
 /// DeclContextPrinter - Decl and DeclContext Visualization
@@ -475,6 +485,6 @@ void DeclContextPrinter::PrintDeclContext(const DeclContext* DC,
     }
   }
 }
-ASTConsumer *clang::CreateDeclContextPrinter() {
-  return new DeclContextPrinter();
+std::unique_ptr<ASTConsumer> clang::CreateDeclContextPrinter() {
+  return llvm::make_unique<DeclContextPrinter>();
 }
diff --git a/contrib/llvm/tools/clang/lib/Frontend/ASTMerge.cpp b/contrib/llvm/tools/clang/lib/Frontend/ASTMerge.cpp
index ff6434c..216ac6a 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/ASTMerge.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/ASTMerge.cpp
@@ -16,8 +16,8 @@
 
 using namespace clang;
 
-ASTConsumer *ASTMergeAction::CreateASTConsumer(CompilerInstance &CI,
-                                               StringRef InFile) {
+std::unique_ptr<ASTConsumer>
+ASTMergeAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
   return AdaptedAction->CreateASTConsumer(CI, InFile);
 }
 
@@ -45,8 +45,8 @@ void ASTMergeAction::ExecuteAction() {
                                     new ForwardingDiagnosticConsumer(
                                           *CI.getDiagnostics().getClient()),
                                     /*ShouldOwnClient=*/true));
-    ASTUnit *Unit = ASTUnit::LoadFromASTFile(ASTFiles[I], Diags,
-                                             CI.getFileSystemOpts(), false);
+    std::unique_ptr<ASTUnit> Unit = ASTUnit::LoadFromASTFile(
+        ASTFiles[I], Diags, CI.getFileSystemOpts(), false);
     if (!Unit)
       continue;
 
@@ -66,8 +66,6 @@ void ASTMergeAction::ExecuteAction() {
       
       Importer.Import(D);
     }
-
-    delete Unit;
   }
 
   AdaptedAction->ExecuteAction();
diff --git a/contrib/llvm/tools/clang/lib/Frontend/ASTUnit.cpp b/contrib/llvm/tools/clang/lib/Frontend/ASTUnit.cpp
index fc44d9f..a3998fa 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/ASTUnit.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/ASTUnit.cpp
@@ -105,7 +105,8 @@ static llvm::sys::SmartMutex<false> &getOnDiskMutex() {
 
 static void cleanupOnDiskMapAtExit();
 
-typedef llvm::DenseMap<const ASTUnit *, OnDiskData *> OnDiskDataMap;
+typedef llvm::DenseMap<const ASTUnit *,
+                       std::unique_ptr<OnDiskData>> OnDiskDataMap;
 static OnDiskDataMap &getOnDiskDataMap() {
   static OnDiskDataMap M;
   static bool hasRegisteredAtExit = false;
@@ -132,9 +133,9 @@ static OnDiskData &getOnDiskData(const ASTUnit *AU) {
   // DenseMap.
   llvm::MutexGuard Guard(getOnDiskMutex());
   OnDiskDataMap &M = getOnDiskDataMap();
-  OnDiskData *&D = M[AU];
+  auto &D = M[AU];
   if (!D)
-    D = new OnDiskData();
+    D = llvm::make_unique<OnDiskData>();
   return *D;
 }
 
@@ -150,7 +151,6 @@ static void removeOnDiskEntry(const ASTUnit *AU) {
   OnDiskDataMap::iterator I = M.find(AU);
   if (I != M.end()) {
     I->second->Cleanup();
-    delete I->second;
     M.erase(AU);
   }
 }
@@ -219,8 +219,8 @@ ASTUnit::ASTUnit(bool _MainFileIsAST)
     TUKind(TU_Complete), WantTiming(getenv("LIBCLANG_TIMING")),
     OwnsRemappedFileBuffers(true),
     NumStoredDiagnosticsFromDriver(0),
-    PreambleRebuildCounter(0), SavedMainFileBuffer(nullptr),
-    PreambleBuffer(nullptr), NumWarningsInPreamble(0),
+    PreambleRebuildCounter(0),
+    NumWarningsInPreamble(0),
     ShouldCacheCodeCompletionResults(false),
     IncludeBriefCommentsInCodeCompletion(false), UserFilesAreVolatile(false),
     CompletionCacheTopLevelHashValue(0),
@@ -251,9 +251,6 @@ ASTUnit::~ASTUnit() {
     for (const auto &RB : PPOpts.RemappedFileBuffers)
       delete RB.second;
   }
-  
-  delete SavedMainFileBuffer;
-  delete PreambleBuffer;
 
   ClearCachedCompletionResults();  
   
@@ -511,8 +508,8 @@ public:
       : PP(PP), Context(Context), LangOpt(LangOpt), TargetOpts(TargetOpts),
         Target(Target), Counter(Counter), InitializedLanguage(false) {}
 
-  bool ReadLanguageOptions(const LangOptions &LangOpts,
-                           bool Complain) override {
+  bool ReadLanguageOptions(const LangOptions &LangOpts, bool Complain,
+                           bool AllowCompatibleDifferences) override {
     if (InitializedLanguage)
       return false;
     
@@ -592,6 +589,7 @@ class CaptureDroppedDiagnostics {
   DiagnosticsEngine &Diags;
   StoredDiagnosticConsumer Client;
   DiagnosticConsumer *PreviousClient;
+  std::unique_ptr<DiagnosticConsumer> OwningPreviousClient;
 
 public:
   CaptureDroppedDiagnostics(bool RequestCapture, DiagnosticsEngine &Diags,
@@ -599,16 +597,15 @@ public:
     : Diags(Diags), Client(StoredDiags), PreviousClient(nullptr)
   {
     if (RequestCapture || Diags.getClient() == nullptr) {
-      PreviousClient = Diags.takeClient();
-      Diags.setClient(&Client);
+      OwningPreviousClient = Diags.takeClient();
+      PreviousClient = Diags.getClient();
+      Diags.setClient(&Client, false);
     }
   }
 
   ~CaptureDroppedDiagnostics() {
-    if (Diags.getClient() == &Client) {
-      Diags.takeClient();
-      Diags.setClient(PreviousClient);
-    }
+    if (Diags.getClient() == &Client)
+      Diags.setClient(PreviousClient, !!OwningPreviousClient.release());
   }
 };
 
@@ -638,38 +635,30 @@ ASTDeserializationListener *ASTUnit::getDeserializationListener() {
   return nullptr;
 }
 
-llvm::MemoryBuffer *ASTUnit::getBufferForFile(StringRef Filename,
-                                              std::string *ErrorStr) {
+std::unique_ptr<llvm::MemoryBuffer>
+ASTUnit::getBufferForFile(StringRef Filename, std::string *ErrorStr) {
   assert(FileMgr);
-  return FileMgr->getBufferForFile(Filename, ErrorStr);
+  auto Buffer = FileMgr->getBufferForFile(Filename);
+  if (Buffer)
+    return std::move(*Buffer);
+  if (ErrorStr)
+    *ErrorStr = Buffer.getError().message();
+  return nullptr;
 }
 
 /// \brief Configure the diagnostics object for use with ASTUnit.
-void ASTUnit::ConfigureDiags(IntrusiveRefCntPtr<DiagnosticsEngine> &Diags,
-                             const char **ArgBegin, const char **ArgEnd,
+void ASTUnit::ConfigureDiags(IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
                              ASTUnit &AST, bool CaptureDiagnostics) {
-  if (!Diags.get()) {
-    // No diagnostics engine was provided, so create our own diagnostics object
-    // with the default options.
-    DiagnosticConsumer *Client = nullptr;
-    if (CaptureDiagnostics)
-      Client = new StoredDiagnosticConsumer(AST.StoredDiagnostics);
-    Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions(),
-                                                Client,
-                                                /*ShouldOwnClient=*/true);
-  } else if (CaptureDiagnostics) {
+  assert(Diags.get() && "no DiagnosticsEngine was provided");
+  if (CaptureDiagnostics)
     Diags->setClient(new StoredDiagnosticConsumer(AST.StoredDiagnostics));
-  }
 }
 
-ASTUnit *ASTUnit::LoadFromASTFile(const std::string &Filename,
-                              IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
-                                  const FileSystemOptions &FileSystemOpts,
-                                  bool OnlyLocalDecls,
-                                  ArrayRef<RemappedFile> RemappedFiles,
-                                  bool CaptureDiagnostics,
-                                  bool AllowPCHWithCompilerErrors,
-                                  bool UserFilesAreVolatile) {
+std::unique_ptr<ASTUnit> ASTUnit::LoadFromASTFile(
+    const std::string &Filename, IntrusiveRefCntPtr<DiagnosticsEngine> Diags,
+    const FileSystemOptions &FileSystemOpts, bool OnlyLocalDecls,
+    ArrayRef<RemappedFile> RemappedFiles, bool CaptureDiagnostics,
+    bool AllowPCHWithCompilerErrors, bool UserFilesAreVolatile) {
   std::unique_ptr<ASTUnit> AST(new ASTUnit(true));
 
   // Recover resources if we crash before exiting this method.
@@ -679,7 +668,7 @@ ASTUnit *ASTUnit::LoadFromASTFile(const std::string &Filename,
     llvm::CrashRecoveryContextReleaseRefCleanup<DiagnosticsEngine> >
     DiagCleanup(Diags.get());
 
-  ConfigureDiags(Diags, nullptr, nullptr, *AST, CaptureDiagnostics);
+  ConfigureDiags(Diags, *AST, CaptureDiagnostics);
 
   AST->OnlyLocalDecls = OnlyLocalDecls;
   AST->CaptureDiagnostics = CaptureDiagnostics;
@@ -705,7 +694,7 @@ ASTUnit *ASTUnit::LoadFromASTFile(const std::string &Filename,
 
   // Gather Info for preprocessor construction later on.
 
-  HeaderSearch &HeaderInfo = *AST->HeaderInfo.get();
+  HeaderSearch &HeaderInfo = *AST->HeaderInfo;
   unsigned Counter;
 
   AST->PP =
@@ -728,10 +717,9 @@ ASTUnit *ASTUnit::LoadFromASTFile(const std::string &Filename,
                              /*DisableValidation=*/disableValid,
                              AllowPCHWithCompilerErrors);
 
-  AST->Reader->setListener(new ASTInfoCollector(*AST->PP, Context,
-                                           AST->ASTFileLangOpts,
-                                           AST->TargetOpts, AST->Target, 
-                                           Counter));
+  AST->Reader->setListener(llvm::make_unique<ASTInfoCollector>(
+      *AST->PP, Context, AST->ASTFileLangOpts, AST->TargetOpts, AST->Target,
+      Counter));
 
   switch (AST->Reader->ReadAST(Filename, serialization::MK_MainFile,
                           SourceLocation(), ASTReader::ARR_None)) {
@@ -768,7 +756,7 @@ ASTUnit *ASTUnit::LoadFromASTFile(const std::string &Filename,
   // Tell the diagnostic client that we have started a source file.
   AST->getDiagnostics().getClient()->BeginSourceFile(Context.getLangOpts(),&PP);
 
-  return AST.release();
+  return AST;
 }
 
 namespace {
@@ -891,12 +879,13 @@ class TopLevelDeclTrackerAction : public ASTFrontendAction {
 public:
   ASTUnit &Unit;
 
-  ASTConsumer *CreateASTConsumer(CompilerInstance &CI,
-                                 StringRef InFile) override {
+  std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI,
+                                                 StringRef InFile) override {
     CI.getPreprocessor().addPPCallbacks(
-     new MacroDefinitionTrackerPPCallbacks(Unit.getCurrentTopLevelHashValue()));
-    return new TopLevelDeclTrackerConsumer(Unit, 
-                                           Unit.getCurrentTopLevelHashValue());
+        llvm::make_unique<MacroDefinitionTrackerPPCallbacks>(
+                                           Unit.getCurrentTopLevelHashValue()));
+    return llvm::make_unique<TopLevelDeclTrackerConsumer>(
+        Unit, Unit.getCurrentTopLevelHashValue());
   }
 
 public:
@@ -916,8 +905,8 @@ public:
   explicit PrecompilePreambleAction(ASTUnit &Unit)
       : Unit(Unit), HasEmittedPreamblePCH(false) {}
 
-  ASTConsumer *CreateASTConsumer(CompilerInstance &CI,
-                                 StringRef InFile) override;
+  std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI,
+                                                 StringRef InFile) override;
   bool hasEmittedPreamblePCH() const { return HasEmittedPreamblePCH; }
   void setHasEmittedPreamblePCH() { HasEmittedPreamblePCH = true; }
   bool shouldEraseOutputFiles() override { return !hasEmittedPreamblePCH(); }
@@ -979,8 +968,9 @@ public:
 
 }
 
-ASTConsumer *PrecompilePreambleAction::CreateASTConsumer(CompilerInstance &CI,
-                                                         StringRef InFile) {
+std::unique_ptr<ASTConsumer>
+PrecompilePreambleAction::CreateASTConsumer(CompilerInstance &CI,
+                                            StringRef InFile) {
   std::string Sysroot;
   std::string OutputFile;
   raw_ostream *OS = nullptr;
@@ -991,10 +981,11 @@ ASTConsumer *PrecompilePreambleAction::CreateASTConsumer(CompilerInstance &CI,
   if (!CI.getFrontendOpts().RelocatablePCH)
     Sysroot.clear();
 
-  CI.getPreprocessor().addPPCallbacks(new MacroDefinitionTrackerPPCallbacks(
-      Unit.getCurrentTopLevelHashValue()));
-  return new PrecompilePreambleConsumer(Unit, this, CI.getPreprocessor(),
-                                        Sysroot, OS);
+  CI.getPreprocessor().addPPCallbacks(
+      llvm::make_unique<MacroDefinitionTrackerPPCallbacks>(
+                                           Unit.getCurrentTopLevelHashValue()));
+  return llvm::make_unique<PrecompilePreambleConsumer>(
+      Unit, this, CI.getPreprocessor(), Sysroot, OS);
 }
 
 static bool isNonDriverDiag(const StoredDiagnostic &StoredDiag) {
@@ -1031,15 +1022,12 @@ static void checkAndSanitizeDiags(SmallVectorImpl<StoredDiagnostic> &
 ///
 /// \returns True if a failure occurred that causes the ASTUnit not to
 /// contain any translation-unit information, false otherwise.
-bool ASTUnit::Parse(llvm::MemoryBuffer *OverrideMainBuffer) {
-  delete SavedMainFileBuffer;
-  SavedMainFileBuffer = nullptr;
+bool ASTUnit::Parse(std::unique_ptr<llvm::MemoryBuffer> OverrideMainBuffer) {
+  SavedMainFileBuffer.reset();
 
-  if (!Invocation) {
-    delete OverrideMainBuffer;
+  if (!Invocation)
     return true;
-  }
-  
+
   // Create the compiler instance to use for building the AST.
   std::unique_ptr<CompilerInstance> Clang(new CompilerInstance());
 
@@ -1060,10 +1048,8 @@ bool ASTUnit::Parse(llvm::MemoryBuffer *OverrideMainBuffer) {
   // Create the target instance.
   Clang->setTarget(TargetInfo::CreateTargetInfo(
       Clang->getDiagnostics(), Clang->getInvocation().TargetOpts));
-  if (!Clang->hasTarget()) {
-    delete OverrideMainBuffer;
+  if (!Clang->hasTarget())
     return true;
-  }
 
   // Inform the target of the language options.
   //
@@ -1083,10 +1069,8 @@ bool ASTUnit::Parse(llvm::MemoryBuffer *OverrideMainBuffer) {
   FileSystemOpts = Clang->getFileSystemOpts();
   IntrusiveRefCntPtr<vfs::FileSystem> VFS =
       createVFSFromCompilerInvocation(Clang->getInvocation(), getDiagnostics());
-  if (!VFS) {
-    delete OverrideMainBuffer;
+  if (!VFS)
     return true;
-  }
   FileMgr = new FileManager(FileSystemOpts, VFS);
   SourceMgr = new SourceManager(getDiagnostics(), *FileMgr,
                                 UserFilesAreVolatile);
@@ -1115,7 +1099,8 @@ bool ASTUnit::Parse(llvm::MemoryBuffer *OverrideMainBuffer) {
   // make that override happen and introduce the preamble.
   PreprocessorOptions &PreprocessorOpts = Clang->getPreprocessorOpts();
   if (OverrideMainBuffer) {
-    PreprocessorOpts.addRemappedFile(OriginalSourceFile, OverrideMainBuffer);
+    PreprocessorOpts.addRemappedFile(OriginalSourceFile,
+                                     OverrideMainBuffer.get());
     PreprocessorOpts.PrecompiledPreambleBytes.first = Preamble.size();
     PreprocessorOpts.PrecompiledPreambleBytes.second
                                                     = PreambleEndsAtStartOfLine;
@@ -1130,7 +1115,7 @@ bool ASTUnit::Parse(llvm::MemoryBuffer *OverrideMainBuffer) {
     checkAndSanitizeDiags(StoredDiagnostics, getSourceManager());
 
     // Keep track of the override buffer;
-    SavedMainFileBuffer = OverrideMainBuffer;
+    SavedMainFileBuffer = std::move(OverrideMainBuffer);
   }
 
   std::unique_ptr<TopLevelDeclTrackerAction> Act(
@@ -1143,7 +1128,7 @@ bool ASTUnit::Parse(llvm::MemoryBuffer *OverrideMainBuffer) {
   if (!Act->BeginSourceFile(*Clang.get(), Clang->getFrontendOpts().Inputs[0]))
     goto error;
 
-  if (OverrideMainBuffer) {
+  if (SavedMainFileBuffer) {
     std::string ModName = getPreambleFile(this);
     TranslateStoredDiagnostics(getFileManager(), getSourceManager(),
                                PreambleDiagnostics, StoredDiagnostics);
@@ -1162,10 +1147,7 @@ bool ASTUnit::Parse(llvm::MemoryBuffer *OverrideMainBuffer) {
 
 error:
   // Remove the overridden buffer we used for the preamble.
-  if (OverrideMainBuffer) {
-    delete OverrideMainBuffer;
-    SavedMainFileBuffer = nullptr;
-  }
+  SavedMainFileBuffer = nullptr;
 
   // Keep the ownership of the data in the ASTUnit because the client may
   // want to see the diagnostics.
@@ -1194,17 +1176,16 @@ static std::string GetPreamblePCHPath() {
 /// \brief Compute the preamble for the main file, providing the source buffer
 /// that corresponds to the main file along with a pair (bytes, start-of-line)
 /// that describes the preamble.
-std::pair<llvm::MemoryBuffer *, std::pair<unsigned, bool> > 
-ASTUnit::ComputePreamble(CompilerInvocation &Invocation, 
-                         unsigned MaxLines, bool &CreatedBuffer) {
+ASTUnit::ComputedPreamble
+ASTUnit::ComputePreamble(CompilerInvocation &Invocation, unsigned MaxLines) {
   FrontendOptions &FrontendOpts = Invocation.getFrontendOpts();
   PreprocessorOptions &PreprocessorOpts = Invocation.getPreprocessorOpts();
-  CreatedBuffer = false;
   
   // Try to determine if the main file has been remapped, either from the 
   // command line (to another file) or directly through the compiler invocation
   // (to a memory buffer).
   llvm::MemoryBuffer *Buffer = nullptr;
+  std::unique_ptr<llvm::MemoryBuffer> BufferOwner;
   std::string MainFilePath(FrontendOpts.Inputs[0].getFile());
   llvm::sys::fs::UniqueID MainFileID;
   if (!llvm::sys::fs::getUniqueID(MainFilePath, MainFileID)) {
@@ -1215,15 +1196,9 @@ ASTUnit::ComputePreamble(CompilerInvocation &Invocation,
       if (!llvm::sys::fs::getUniqueID(MPath, MID)) {
         if (MainFileID == MID) {
           // We found a remapping. Try to load the resulting, remapped source.
-          if (CreatedBuffer) {
-            delete Buffer;
-            CreatedBuffer = false;
-          }
-
-          Buffer = getBufferForFile(RF.second);
-          if (!Buffer)
-            return std::make_pair(nullptr, std::make_pair(0, true));
-          CreatedBuffer = true;
+          BufferOwner = getBufferForFile(RF.second);
+          if (!BufferOwner)
+            return ComputedPreamble(nullptr, nullptr, 0, true);
         }
       }
     }
@@ -1236,11 +1211,7 @@ ASTUnit::ComputePreamble(CompilerInvocation &Invocation,
       if (!llvm::sys::fs::getUniqueID(MPath, MID)) {
         if (MainFileID == MID) {
           // We found a remapping.
-          if (CreatedBuffer) {
-            delete Buffer;
-            CreatedBuffer = false;
-          }
-
+          BufferOwner.reset();
           Buffer = const_cast<llvm::MemoryBuffer *>(RB.second);
         }
       }
@@ -1248,17 +1219,18 @@ ASTUnit::ComputePreamble(CompilerInvocation &Invocation,
   }
   
   // If the main source file was not remapped, load it now.
-  if (!Buffer) {
-    Buffer = getBufferForFile(FrontendOpts.Inputs[0].getFile());
-    if (!Buffer)
-      return std::make_pair(nullptr, std::make_pair(0, true));
-
-    CreatedBuffer = true;
+  if (!Buffer && !BufferOwner) {
+    BufferOwner = getBufferForFile(FrontendOpts.Inputs[0].getFile());
+    if (!BufferOwner)
+      return ComputedPreamble(nullptr, nullptr, 0, true);
   }
-  
-  return std::make_pair(Buffer, Lexer::ComputePreamble(Buffer,
-                                                       *Invocation.getLangOpts(),
-                                                       MaxLines));
+
+  if (!Buffer)
+    Buffer = BufferOwner.get();
+  auto Pre = Lexer::ComputePreamble(Buffer->getBuffer(),
+                                    *Invocation.getLangOpts(), MaxLines);
+  return ComputedPreamble(Buffer, std::move(BufferOwner), Pre.first,
+                          Pre.second);
 }
 
 ASTUnit::PreambleFileHash
@@ -1300,42 +1272,44 @@ makeStandaloneRange(CharSourceRange Range, const SourceManager &SM,
   return std::make_pair(Offset, EndOffset);
 }
 
-static void makeStandaloneFixIt(const SourceManager &SM,
-                                const LangOptions &LangOpts,
-                                const FixItHint &InFix,
-                                ASTUnit::StandaloneFixIt &OutFix) {
+static ASTUnit::StandaloneFixIt makeStandaloneFixIt(const SourceManager &SM,
+                                                    const LangOptions &LangOpts,
+                                                    const FixItHint &InFix) {
+  ASTUnit::StandaloneFixIt OutFix;
   OutFix.RemoveRange = makeStandaloneRange(InFix.RemoveRange, SM, LangOpts);
   OutFix.InsertFromRange = makeStandaloneRange(InFix.InsertFromRange, SM,
                                                LangOpts);
   OutFix.CodeToInsert = InFix.CodeToInsert;
   OutFix.BeforePreviousInsertions = InFix.BeforePreviousInsertions;
+  return OutFix;
 }
 
-static void makeStandaloneDiagnostic(const LangOptions &LangOpts,
-                                     const StoredDiagnostic &InDiag,
-                                     ASTUnit::StandaloneDiagnostic &OutDiag) {
+static ASTUnit::StandaloneDiagnostic
+makeStandaloneDiagnostic(const LangOptions &LangOpts,
+                         const StoredDiagnostic &InDiag) {
+  ASTUnit::StandaloneDiagnostic OutDiag;
   OutDiag.ID = InDiag.getID();
   OutDiag.Level = InDiag.getLevel();
   OutDiag.Message = InDiag.getMessage();
   OutDiag.LocOffset = 0;
   if (InDiag.getLocation().isInvalid())
-    return;
+    return OutDiag;
   const SourceManager &SM = InDiag.getLocation().getManager();
   SourceLocation FileLoc = SM.getFileLoc(InDiag.getLocation());
   OutDiag.Filename = SM.getFilename(FileLoc);
   if (OutDiag.Filename.empty())
-    return;
+    return OutDiag;
   OutDiag.LocOffset = SM.getFileOffset(FileLoc);
   for (StoredDiagnostic::range_iterator
          I = InDiag.range_begin(), E = InDiag.range_end(); I != E; ++I) {
     OutDiag.Ranges.push_back(makeStandaloneRange(*I, SM, LangOpts));
   }
-  for (StoredDiagnostic::fixit_iterator
-         I = InDiag.fixit_begin(), E = InDiag.fixit_end(); I != E; ++I) {
-    ASTUnit::StandaloneFixIt Fix;
-    makeStandaloneFixIt(SM, LangOpts, *I, Fix);
-    OutDiag.FixIts.push_back(Fix);
-  }
+  for (StoredDiagnostic::fixit_iterator I = InDiag.fixit_begin(),
+                                        E = InDiag.fixit_end();
+       I != E; ++I)
+    OutDiag.FixIts.push_back(makeStandaloneFixIt(SM, LangOpts, *I));
+
+  return OutDiag;
 }
 
 /// \brief Attempt to build or re-use a precompiled preamble when (re-)parsing
@@ -1358,27 +1332,20 @@ static void makeStandaloneDiagnostic(const LangOptions &LangOpts,
 /// \returns If the precompiled preamble can be used, returns a newly-allocated
 /// buffer that should be used in place of the main file when doing so.
 /// Otherwise, returns a NULL pointer.
-llvm::MemoryBuffer *ASTUnit::getMainBufferWithPrecompiledPreamble(
-                              const CompilerInvocation &PreambleInvocationIn,
-                                                           bool AllowRebuild,
-                                                           unsigned MaxLines) {
-  
+std::unique_ptr<llvm::MemoryBuffer>
+ASTUnit::getMainBufferWithPrecompiledPreamble(
+    const CompilerInvocation &PreambleInvocationIn, bool AllowRebuild,
+    unsigned MaxLines) {
+
   IntrusiveRefCntPtr<CompilerInvocation>
     PreambleInvocation(new CompilerInvocation(PreambleInvocationIn));
   FrontendOptions &FrontendOpts = PreambleInvocation->getFrontendOpts();
   PreprocessorOptions &PreprocessorOpts
     = PreambleInvocation->getPreprocessorOpts();
 
-  bool CreatedPreambleBuffer = false;
-  std::pair<llvm::MemoryBuffer *, std::pair<unsigned, bool> > NewPreamble 
-    = ComputePreamble(*PreambleInvocation, MaxLines, CreatedPreambleBuffer);
-
-  // If ComputePreamble() Take ownership of the preamble buffer.
-  std::unique_ptr<llvm::MemoryBuffer> OwnedPreambleBuffer;
-  if (CreatedPreambleBuffer)
-    OwnedPreambleBuffer.reset(NewPreamble.first);
+  ComputedPreamble NewPreamble = ComputePreamble(*PreambleInvocation, MaxLines);
 
-  if (!NewPreamble.second.first) {
+  if (!NewPreamble.Size) {
     // We couldn't find a preamble in the main source. Clear out the current
     // preamble, if we have one. It's obviously no good any more.
     Preamble.clear();
@@ -1394,10 +1361,10 @@ llvm::MemoryBuffer *ASTUnit::getMainBufferWithPrecompiledPreamble(
     // preamble now that we did before, and that there's enough space in
     // the main-file buffer within the precompiled preamble to fit the
     // new main file.
-    if (Preamble.size() == NewPreamble.second.first &&
-        PreambleEndsAtStartOfLine == NewPreamble.second.second &&
-        memcmp(Preamble.getBufferStart(), NewPreamble.first->getBufferStart(),
-               NewPreamble.second.first) == 0) {
+    if (Preamble.size() == NewPreamble.Size &&
+        PreambleEndsAtStartOfLine == NewPreamble.PreambleEndsAtStartOfLine &&
+        memcmp(Preamble.getBufferStart(), NewPreamble.Buffer->getBufferStart(),
+               NewPreamble.Size) == 0) {
       // The preamble has not changed. We may be able to re-use the precompiled
       // preamble.
 
@@ -1467,7 +1434,7 @@ llvm::MemoryBuffer *ASTUnit::getMainBufferWithPrecompiledPreamble(
         getDiagnostics().setNumWarnings(NumWarningsInPreamble);
 
         return llvm::MemoryBuffer::getMemBufferCopy(
-            NewPreamble.first->getBuffer(), FrontendOpts.Inputs[0].getFile());
+            NewPreamble.Buffer->getBuffer(), FrontendOpts.Inputs[0].getFile());
       }
     }
 
@@ -1512,19 +1479,16 @@ llvm::MemoryBuffer *ASTUnit::getMainBufferWithPrecompiledPreamble(
   // subsequent reparses.
   StringRef MainFilename = FrontendOpts.Inputs[0].getFile();
   Preamble.assign(FileMgr->getFile(MainFilename),
-                  NewPreamble.first->getBufferStart(), 
-                  NewPreamble.first->getBufferStart() 
-                                                  + NewPreamble.second.first);
-  PreambleEndsAtStartOfLine = NewPreamble.second.second;
+                  NewPreamble.Buffer->getBufferStart(),
+                  NewPreamble.Buffer->getBufferStart() + NewPreamble.Size);
+  PreambleEndsAtStartOfLine = NewPreamble.PreambleEndsAtStartOfLine;
 
-  delete PreambleBuffer;
-  PreambleBuffer
-    = llvm::MemoryBuffer::getMemBufferCopy(
-        NewPreamble.first->getBuffer().slice(0, Preamble.size()), MainFilename);
+  PreambleBuffer = llvm::MemoryBuffer::getMemBufferCopy(
+      NewPreamble.Buffer->getBuffer().slice(0, Preamble.size()), MainFilename);
 
   // Remap the main source file to the preamble buffer.
   StringRef MainFilePath = FrontendOpts.Inputs[0].getFile();
-  PreprocessorOpts.addRemappedFile(MainFilePath, PreambleBuffer);
+  PreprocessorOpts.addRemappedFile(MainFilePath, PreambleBuffer.get());
 
   // Tell the compiler invocation to generate a temporary precompiled header.
   FrontendOpts.ProgramAction = frontend::GeneratePCH;
@@ -1607,13 +1571,11 @@ llvm::MemoryBuffer *ASTUnit::getMainBufferWithPrecompiledPreamble(
 
   // Transfer any diagnostics generated when parsing the preamble into the set
   // of preamble diagnostics.
-  for (stored_diag_iterator
-         I = stored_diag_afterDriver_begin(),
-         E = stored_diag_end(); I != E; ++I) {
-    StandaloneDiagnostic Diag;
-    makeStandaloneDiagnostic(Clang->getLangOpts(), *I, Diag);
-    PreambleDiagnostics.push_back(Diag);
-  }
+  for (stored_diag_iterator I = stored_diag_afterDriver_begin(),
+                            E = stored_diag_end();
+       I != E; ++I)
+    PreambleDiagnostics.push_back(
+        makeStandaloneDiagnostic(Clang->getLangOpts(), *I));
 
   Act->EndSourceFile();
 
@@ -1663,8 +1625,8 @@ llvm::MemoryBuffer *ASTUnit::getMainBufferWithPrecompiledPreamble(
     CompletionCacheTopLevelHashValue = 0;
     PreambleTopLevelHashValue = CurrentTopLevelHashValue;
   }
-  
-  return llvm::MemoryBuffer::getMemBufferCopy(NewPreamble.first->getBuffer(),
+
+  return llvm::MemoryBuffer::getMemBufferCopy(NewPreamble.Buffer->getBuffer(),
                                               MainFilename);
 }
 
@@ -1688,8 +1650,8 @@ void ASTUnit::transferASTDataFromCompilerInstance(CompilerInstance &CI) {
   // created.
   assert(CI.hasInvocation() && "missing invocation");
   LangOpts = CI.getInvocation().LangOpts;
-  TheSema.reset(CI.takeSema());
-  Consumer.reset(CI.takeASTConsumer());
+  TheSema = CI.takeSema();
+  Consumer = CI.takeASTConsumer();
   if (CI.hasASTContext())
     Ctx = &CI.getASTContext();
   if (CI.hasPreprocessor())
@@ -1735,7 +1697,7 @@ ASTUnit *ASTUnit::create(CompilerInvocation *CI,
                          bool UserFilesAreVolatile) {
   std::unique_ptr<ASTUnit> AST;
   AST.reset(new ASTUnit(false));
-  ConfigureDiags(Diags, nullptr, nullptr, *AST, CaptureDiagnostics);
+  ConfigureDiags(Diags, *AST, CaptureDiagnostics);
   AST->Diagnostics = Diags;
   AST->Invocation = CI;
   AST->FileSystemOpts = CI->getFileSystemOpts();
@@ -1862,13 +1824,15 @@ ASTUnit *ASTUnit::LoadFromCompilerInvocationAction(
 
   if (Persistent && !TrackerAct) {
     Clang->getPreprocessor().addPPCallbacks(
-     new MacroDefinitionTrackerPPCallbacks(AST->getCurrentTopLevelHashValue()));
-    std::vector<ASTConsumer*> Consumers;
+        llvm::make_unique<MacroDefinitionTrackerPPCallbacks>(
+                                           AST->getCurrentTopLevelHashValue()));
+    std::vector<std::unique_ptr<ASTConsumer>> Consumers;
     if (Clang->hasASTConsumer())
       Consumers.push_back(Clang->takeASTConsumer());
-    Consumers.push_back(new TopLevelDeclTrackerConsumer(*AST,
-                                           AST->getCurrentTopLevelHashValue()));
-    Clang->setASTConsumer(new MultiplexConsumer(Consumers));
+    Consumers.push_back(llvm::make_unique<TopLevelDeclTrackerConsumer>(
+        *AST, AST->getCurrentTopLevelHashValue()));
+    Clang->setASTConsumer(
+        llvm::make_unique<MultiplexConsumer>(std::move(Consumers)));
   }
   if (!Act->Execute()) {
     AST->transferASTDataFromCompilerInstance(*Clang);
@@ -1898,11 +1862,10 @@ bool ASTUnit::LoadFromCompilerInvocation(bool PrecompilePreamble) {
   Invocation->getFrontendOpts().DisableFree = false;
   ProcessWarningOptions(getDiagnostics(), Invocation->getDiagnosticOpts());
 
-  llvm::MemoryBuffer *OverrideMainBuffer = nullptr;
+  std::unique_ptr<llvm::MemoryBuffer> OverrideMainBuffer;
   if (PrecompilePreamble) {
     PreambleRebuildCounter = 2;
-    OverrideMainBuffer
-      = getMainBufferWithPrecompiledPreamble(*Invocation);
+    OverrideMainBuffer = getMainBufferWithPrecompiledPreamble(*Invocation);
   }
   
   SimpleTimer ParsingTimer(WantTiming);
@@ -1910,9 +1873,9 @@ bool ASTUnit::LoadFromCompilerInvocation(bool PrecompilePreamble) {
   
   // Recover resources if we crash before exiting this method.
   llvm::CrashRecoveryContextCleanupRegistrar<llvm::MemoryBuffer>
-    MemBufferCleanup(OverrideMainBuffer);
-  
-  return Parse(OverrideMainBuffer);
+    MemBufferCleanup(OverrideMainBuffer.get());
+
+  return Parse(std::move(OverrideMainBuffer));
 }
 
 std::unique_ptr<ASTUnit> ASTUnit::LoadFromCompilerInvocation(
@@ -1922,7 +1885,7 @@ std::unique_ptr<ASTUnit> ASTUnit::LoadFromCompilerInvocation(
     bool IncludeBriefCommentsInCodeCompletion, bool UserFilesAreVolatile) {
   // Create the AST unit.
   std::unique_ptr<ASTUnit> AST(new ASTUnit(false));
-  ConfigureDiags(Diags, nullptr, nullptr, *AST, CaptureDiagnostics);
+  ConfigureDiags(Diags, *AST, CaptureDiagnostics);
   AST->Diagnostics = Diags;
   AST->OnlyLocalDecls = OnlyLocalDecls;
   AST->CaptureDiagnostics = CaptureDiagnostics;
@@ -1961,11 +1924,7 @@ ASTUnit *ASTUnit::LoadFromCommandLine(
     bool AllowPCHWithCompilerErrors, bool SkipFunctionBodies,
     bool UserFilesAreVolatile, bool ForSerialization,
     std::unique_ptr<ASTUnit> *ErrAST) {
-  if (!Diags.get()) {
-    // No diagnostics engine was provided, so create our own diagnostics object
-    // with the default options.
-    Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions());
-  }
+  assert(Diags.get() && "no DiagnosticsEngine was provided");
 
   SmallVector<StoredDiagnostic, 4> StoredDiagnostics;
   
@@ -2000,9 +1959,8 @@ ASTUnit *ASTUnit::LoadFromCommandLine(
   // Create the AST unit.
   std::unique_ptr<ASTUnit> AST;
   AST.reset(new ASTUnit(false));
-  ConfigureDiags(Diags, ArgBegin, ArgEnd, *AST, CaptureDiagnostics);
+  ConfigureDiags(Diags, *AST, CaptureDiagnostics);
   AST->Diagnostics = Diags;
-  Diags = nullptr; // Zero out now to ease cleanup during crash recovery.
   AST->FileSystemOpts = CI->getFileSystemOpts();
   IntrusiveRefCntPtr<vfs::FileSystem> VFS =
       createVFSFromCompilerInvocation(*CI, *Diags);
@@ -2021,7 +1979,9 @@ ASTUnit *ASTUnit::LoadFromCommandLine(
   AST->Invocation = CI;
   if (ForSerialization)
     AST->WriterData.reset(new ASTWriterData());
-  CI = nullptr; // Zero out now to ease cleanup during crash recovery.
+  // Zero out now to ease cleanup during crash recovery.
+  CI = nullptr;
+  Diags = nullptr;
 
   // Recover resources if we crash before exiting this method.
   llvm::CrashRecoveryContextCleanupRegistrar<ASTUnit>
@@ -2062,7 +2022,7 @@ bool ASTUnit::Reparse(ArrayRef<RemappedFile> RemappedFiles) {
 
   // If we have a preamble file lying around, or if we might try to
   // build a precompiled preamble, do so now.
-  llvm::MemoryBuffer *OverrideMainBuffer = nullptr;
+  std::unique_ptr<llvm::MemoryBuffer> OverrideMainBuffer;
   if (!getPreambleFile(this).empty() || PreambleRebuildCounter > 0)
     OverrideMainBuffer = getMainBufferWithPrecompiledPreamble(*Invocation);
     
@@ -2073,8 +2033,8 @@ bool ASTUnit::Reparse(ArrayRef<RemappedFile> RemappedFiles) {
     getDiagnostics().setNumWarnings(NumWarningsInPreamble);
 
   // Parse the sources
-  bool Result = Parse(OverrideMainBuffer);
-  
+  bool Result = Parse(std::move(OverrideMainBuffer));
+
   // If we're caching global code-completion results, and the top-level 
   // declarations have changed, clear out the code-completion cache.
   if (!Result && ShouldCacheCodeCompletionResults &&
@@ -2366,6 +2326,10 @@ void ASTUnit::CodeComplete(StringRef File, unsigned Line, unsigned Column,
   // Set the language options appropriately.
   LangOpts = *CCInvocation->getLangOpts();
 
+  // Spell-checking and warnings are wasteful during code-completion.
+  LangOpts.SpellChecking = false;
+  CCInvocation->getDiagnosticOpts().IgnoreWarnings = true;
+
   std::unique_ptr<CompilerInstance> Clang(new CompilerInstance());
 
   // Recover resources if we crash before exiting this method.
@@ -2427,7 +2391,7 @@ void ASTUnit::CodeComplete(StringRef File, unsigned Line, unsigned Column,
   // the use of the precompiled preamble if we're if the completion
   // point is within the main file, after the end of the precompiled
   // preamble.
-  llvm::MemoryBuffer *OverrideMainBuffer = nullptr;
+  std::unique_ptr<llvm::MemoryBuffer> OverrideMainBuffer;
   if (!getPreambleFile(this).empty()) {
     std::string CompleteFilePath(File);
     llvm::sys::fs::UniqueID CompleteFileID;
@@ -2437,9 +2401,8 @@ void ASTUnit::CodeComplete(StringRef File, unsigned Line, unsigned Column,
       llvm::sys::fs::UniqueID MainID;
       if (!llvm::sys::fs::getUniqueID(MainPath, MainID)) {
         if (CompleteFileID == MainID && Line > 1)
-          OverrideMainBuffer
-            = getMainBufferWithPrecompiledPreamble(*CCInvocation, false, 
-                                                   Line - 1);
+          OverrideMainBuffer = getMainBufferWithPrecompiledPreamble(
+              *CCInvocation, false, Line - 1);
       }
     }
   }
@@ -2447,14 +2410,15 @@ void ASTUnit::CodeComplete(StringRef File, unsigned Line, unsigned Column,
   // If the main file has been overridden due to the use of a preamble,
   // make that override happen and introduce the preamble.
   if (OverrideMainBuffer) {
-    PreprocessorOpts.addRemappedFile(OriginalSourceFile, OverrideMainBuffer);
+    PreprocessorOpts.addRemappedFile(OriginalSourceFile,
+                                     OverrideMainBuffer.get());
     PreprocessorOpts.PrecompiledPreambleBytes.first = Preamble.size();
     PreprocessorOpts.PrecompiledPreambleBytes.second
                                                     = PreambleEndsAtStartOfLine;
     PreprocessorOpts.ImplicitPCHInclude = getPreambleFile(this);
     PreprocessorOpts.DisablePCHValidation = true;
-    
-    OwnedBuffers.push_back(OverrideMainBuffer);
+
+    OwnedBuffers.push_back(OverrideMainBuffer.release());
   } else {
     PreprocessorOpts.PrecompiledPreambleBytes.first = 0;
     PreprocessorOpts.PrecompiledPreambleBytes.second = false;
@@ -2821,7 +2785,8 @@ struct PCHLocatorInfo {
 static bool PCHLocator(serialization::ModuleFile &M, void *UserData) {
   PCHLocatorInfo &Info = *static_cast<PCHLocatorInfo*>(UserData);
   switch (M.Kind) {
-  case serialization::MK_Module:
+  case serialization::MK_ImplicitModule:
+  case serialization::MK_ExplicitModule:
     return true; // skip dependencies.
   case serialization::MK_PCH:
     Info.Mod = &M;
diff --git a/contrib/llvm/tools/clang/lib/Frontend/CacheTokens.cpp b/contrib/llvm/tools/clang/lib/Frontend/CacheTokens.cpp
index 14f7027..d909d52 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/CacheTokens.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/CacheTokens.cpp
@@ -270,17 +270,17 @@ void PTHWriter::EmitToken(const Token& T) {
     StringRef s(T.getLiteralData(), T.getLength());
 
     // Get the string entry.
-    llvm::StringMapEntry<OffsetOpt> *E = &CachedStrs.GetOrCreateValue(s);
+    auto &E = *CachedStrs.insert(std::make_pair(s, OffsetOpt())).first;
 
     // If this is a new string entry, bump the PTH offset.
-    if (!E->getValue().hasOffset()) {
-      E->getValue().setOffset(CurStrOffset);
-      StrEntries.push_back(E);
+    if (!E.second.hasOffset()) {
+      E.second.setOffset(CurStrOffset);
+      StrEntries.push_back(&E);
       CurStrOffset += s.size() + 1;
     }
 
     // Emit the relative offset into the PTH file for the spelling string.
-    Emit32(E->getValue().getOffset());
+    Emit32(E.second.getOffset());
   }
 
   // Emit the offset into the original source file of this token so that we
@@ -572,8 +572,10 @@ void clang::CacheTokens(Preprocessor &PP, llvm::raw_fd_ostream* OS) {
   PTHWriter PW(*OS, PP);
 
   // Install the 'stat' system call listener in the FileManager.
-  StatListener *StatCache = new StatListener(PW.getPM());
-  PP.getFileManager().addStatCache(StatCache, /*AtBeginning=*/true);
+  auto StatCacheOwner = llvm::make_unique<StatListener>(PW.getPM());
+  StatListener *StatCache = StatCacheOwner.get();
+  PP.getFileManager().addStatCache(std::move(StatCacheOwner),
+                                   /*AtBeginning=*/true);
 
   // Lex through the entire file.  This will populate SourceManager with
   // all of the header information.
diff --git a/contrib/llvm/tools/clang/lib/Frontend/ChainedIncludesSource.cpp b/contrib/llvm/tools/clang/lib/Frontend/ChainedIncludesSource.cpp
index e6e73ac..cb260b4 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/ChainedIncludesSource.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/ChainedIncludesSource.cpp
@@ -74,7 +74,7 @@ protected:
 
 static ASTReader *
 createASTReader(CompilerInstance &CI, StringRef pchFile,
-                SmallVectorImpl<llvm::MemoryBuffer *> &memBufs,
+                SmallVectorImpl<std::unique_ptr<llvm::MemoryBuffer>> &MemBufs,
                 SmallVectorImpl<std::string> &bufNames,
                 ASTDeserializationListener *deserialListener = nullptr) {
   Preprocessor &PP = CI.getPreprocessor();
@@ -83,7 +83,7 @@ createASTReader(CompilerInstance &CI, StringRef pchFile,
                              /*DisableValidation=*/true));
   for (unsigned ti = 0; ti < bufNames.size(); ++ti) {
     StringRef sr(bufNames[ti]);
-    Reader->addInMemoryBuffer(sr, memBufs[ti]);
+    Reader->addInMemoryBuffer(sr, std::move(MemBufs[ti]));
   }
   Reader->setDeserializationListener(deserialListener);
   switch (Reader->ReadAST(pchFile, serialization::MK_PCH, SourceLocation(),
@@ -118,7 +118,7 @@ IntrusiveRefCntPtr<ExternalSemaSource> clang::createChainedIncludesSource(
   IntrusiveRefCntPtr<ChainedIncludesSource> source(new ChainedIncludesSource());
   InputKind IK = CI.getFrontendOpts().Inputs[0].getKind();
 
-  SmallVector<llvm::MemoryBuffer *, 4> serialBufs;
+  SmallVector<std::unique_ptr<llvm::MemoryBuffer>, 4> SerialBufs;
   SmallVector<std::string, 4> serialBufNames;
 
   for (unsigned i = 0, e = includes.size(); i != e; ++i) {
@@ -158,12 +158,12 @@ IntrusiveRefCntPtr<ExternalSemaSource> clang::createChainedIncludesSource(
 
     SmallVector<char, 256> serialAST;
     llvm::raw_svector_ostream OS(serialAST);
-    std::unique_ptr<ASTConsumer> consumer;
-    consumer.reset(new PCHGenerator(Clang->getPreprocessor(), "-", nullptr,
-                                    /*isysroot=*/"", &OS));
+    auto consumer =
+        llvm::make_unique<PCHGenerator>(Clang->getPreprocessor(), "-", nullptr,
+                                        /*isysroot=*/"", &OS);
     Clang->getASTContext().setASTMutationListener(
                                             consumer->GetASTMutationListener());
-    Clang->setASTConsumer(consumer.release());
+    Clang->setASTConsumer(std::move(consumer));
     Clang->createSema(TU_Prefix, nullptr);
 
     if (firstInclude) {
@@ -171,20 +171,21 @@ IntrusiveRefCntPtr<ExternalSemaSource> clang::createChainedIncludesSource(
       PP.getBuiltinInfo().InitializeBuiltins(PP.getIdentifierTable(),
                                              PP.getLangOpts());
     } else {
-      assert(!serialBufs.empty());
-      SmallVector<llvm::MemoryBuffer *, 4> bufs;
+      assert(!SerialBufs.empty());
+      SmallVector<std::unique_ptr<llvm::MemoryBuffer>, 4> Bufs;
       // TODO: Pass through the existing MemoryBuffer instances instead of
       // allocating new ones.
-      for (auto *SB : serialBufs)
-        bufs.push_back(llvm::MemoryBuffer::getMemBuffer(SB->getBuffer()));
+      for (auto &SB : SerialBufs)
+        Bufs.push_back(llvm::MemoryBuffer::getMemBuffer(SB->getBuffer()));
       std::string pchName = includes[i-1];
       llvm::raw_string_ostream os(pchName);
       os << ".pch" << i-1;
       serialBufNames.push_back(os.str());
 
       IntrusiveRefCntPtr<ASTReader> Reader;
-      Reader = createASTReader(*Clang, pchName, bufs, serialBufNames, 
-        Clang->getASTConsumer().GetASTDeserializationListener());
+      Reader = createASTReader(
+          *Clang, pchName, Bufs, serialBufNames,
+          Clang->getASTConsumer().GetASTDeserializationListener());
       if (!Reader)
         return nullptr;
       Clang->setModuleManager(Reader);
@@ -196,14 +197,14 @@ IntrusiveRefCntPtr<ExternalSemaSource> clang::createChainedIncludesSource(
 
     ParseAST(Clang->getSema());
     Clang->getDiagnosticClient().EndSourceFile();
-    serialBufs.push_back(llvm::MemoryBuffer::getMemBufferCopy(OS.str()));
+    SerialBufs.push_back(llvm::MemoryBuffer::getMemBufferCopy(OS.str()));
     source->CIs.push_back(Clang.release());
   }
 
-  assert(!serialBufs.empty());
+  assert(!SerialBufs.empty());
   std::string pchName = includes.back() + ".pch-final";
   serialBufNames.push_back(pchName);
-  Reader = createASTReader(CI, pchName, serialBufs, serialBufNames);
+  Reader = createASTReader(CI, pchName, SerialBufs, serialBufNames);
   if (!Reader)
     return nullptr;
 
diff --git a/contrib/llvm/tools/clang/lib/Frontend/CodeGenOptions.cpp b/contrib/llvm/tools/clang/lib/Frontend/CodeGenOptions.cpp
new file mode 100644
index 0000000..75ee47f
--- /dev/null
+++ b/contrib/llvm/tools/clang/lib/Frontend/CodeGenOptions.cpp
@@ -0,0 +1,24 @@
+//===--- CodeGenOptions.cpp -----------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Frontend/CodeGenOptions.h"
+#include <string.h>
+
+namespace clang {
+
+CodeGenOptions::CodeGenOptions() {
+#define CODEGENOPT(Name, Bits, Default) Name = Default;
+#define ENUM_CODEGENOPT(Name, Type, Bits, Default) set##Name(Default);
+#include "clang/Frontend/CodeGenOptions.def"
+
+  RelocationModel = "pic";
+  memcpy(CoverageVersion, "402*", 4);
+}
+
+}  // end namespace clang
diff --git a/contrib/llvm/tools/clang/lib/Frontend/CompilerInstance.cpp b/contrib/llvm/tools/clang/lib/Frontend/CompilerInstance.cpp
index 6af920d..93a34b7 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/CompilerInstance.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/CompilerInstance.cpp
@@ -101,14 +101,18 @@ void CompilerInstance::setSema(Sema *S) {
   TheSema.reset(S);
 }
 
-void CompilerInstance::setASTConsumer(ASTConsumer *Value) {
-  Consumer.reset(Value);
+void CompilerInstance::setASTConsumer(std::unique_ptr<ASTConsumer> Value) {
+  Consumer = std::move(Value);
 }
 
 void CompilerInstance::setCodeCompletionConsumer(CodeCompleteConsumer *Value) {
   CompletionConsumer.reset(Value);
 }
- 
+
+std::unique_ptr<Sema> CompilerInstance::takeSema() {
+  return std::move(TheSema);
+}
+
 IntrusiveRefCntPtr<ASTReader> CompilerInstance::getModuleManager() const {
   return ModuleManager;
 }
@@ -130,52 +134,48 @@ void CompilerInstance::setModuleDepCollector(
 static void SetUpDiagnosticLog(DiagnosticOptions *DiagOpts,
                                const CodeGenOptions *CodeGenOpts,
                                DiagnosticsEngine &Diags) {
-  std::string ErrorInfo;
-  bool OwnsStream = false;
+  std::error_code EC;
+  std::unique_ptr<raw_ostream> StreamOwner;
   raw_ostream *OS = &llvm::errs();
   if (DiagOpts->DiagnosticLogFile != "-") {
     // Create the output stream.
-    llvm::raw_fd_ostream *FileOS(new llvm::raw_fd_ostream(
-        DiagOpts->DiagnosticLogFile.c_str(), ErrorInfo,
-        llvm::sys::fs::F_Append | llvm::sys::fs::F_Text));
-    if (!ErrorInfo.empty()) {
+    auto FileOS = llvm::make_unique<llvm::raw_fd_ostream>(
+        DiagOpts->DiagnosticLogFile, EC,
+        llvm::sys::fs::F_Append | llvm::sys::fs::F_Text);
+    if (EC) {
       Diags.Report(diag::warn_fe_cc_log_diagnostics_failure)
-        << DiagOpts->DiagnosticLogFile << ErrorInfo;
+          << DiagOpts->DiagnosticLogFile << EC.message();
     } else {
       FileOS->SetUnbuffered();
       FileOS->SetUseAtomicWrites(true);
-      OS = FileOS;
-      OwnsStream = true;
+      OS = FileOS.get();
+      StreamOwner = std::move(FileOS);
     }
   }
 
   // Chain in the diagnostic client which will log the diagnostics.
-  LogDiagnosticPrinter *Logger = new LogDiagnosticPrinter(*OS, DiagOpts,
-                                                          OwnsStream);
+  auto Logger = llvm::make_unique<LogDiagnosticPrinter>(*OS, DiagOpts,
+                                                        std::move(StreamOwner));
   if (CodeGenOpts)
     Logger->setDwarfDebugFlags(CodeGenOpts->DwarfDebugFlags);
-  Diags.setClient(new ChainedDiagnosticConsumer(Diags.takeClient(), Logger));
+  assert(Diags.ownsClient());
+  Diags.setClient(
+      new ChainedDiagnosticConsumer(Diags.takeClient(), std::move(Logger)));
 }
 
 static void SetupSerializedDiagnostics(DiagnosticOptions *DiagOpts,
                                        DiagnosticsEngine &Diags,
                                        StringRef OutputFile) {
-  std::string ErrorInfo;
-  std::unique_ptr<llvm::raw_fd_ostream> OS;
-  OS.reset(new llvm::raw_fd_ostream(OutputFile.str().c_str(), ErrorInfo,
-                                    llvm::sys::fs::F_None));
+  auto SerializedConsumer =
+      clang::serialized_diags::create(OutputFile, DiagOpts);
 
-  if (!ErrorInfo.empty()) {
-    Diags.Report(diag::warn_fe_serialized_diag_failure)
-      << OutputFile << ErrorInfo;
-    return;
+  if (Diags.ownsClient()) {
+    Diags.setClient(new ChainedDiagnosticConsumer(
+        Diags.takeClient(), std::move(SerializedConsumer)));
+  } else {
+    Diags.setClient(new ChainedDiagnosticConsumer(
+        Diags.getClient(), std::move(SerializedConsumer)));
   }
-
-  DiagnosticConsumer *SerializedConsumer =
-      clang::serialized_diags::create(OS.release(), DiagOpts);
-
-  Diags.setClient(new ChainedDiagnosticConsumer(Diags.takeClient(),
-                                                SerializedConsumer));
 }
 
 void CompilerInstance::createDiagnostics(DiagnosticConsumer *Client,
@@ -371,6 +371,14 @@ void CompilerInstance::createPreprocessor(TranslationUnitKind TUKind) {
     AttachHeaderIncludeGen(*PP, /*ShowAllHeaders=*/false, /*OutputPath=*/"",
                            /*ShowDepth=*/true, /*MSStyle=*/true);
   }
+
+  // Load all explictly-specified module map files.
+  for (const auto &Filename : getFrontendOpts().ModuleMapFiles) {
+    if (auto *File = getFileManager().getFile(Filename))
+      PP->getHeaderSearchInfo().loadModuleMapFile(File, /*IsSystem*/false);
+    else
+      getDiagnostics().Report(diag::err_module_map_not_found) << Filename;
+  }
 }
 
 // ASTContext
@@ -569,17 +577,14 @@ CompilerInstance::createOutputFile(StringRef OutputPath,
                                    StringRef Extension,
                                    bool UseTemporary,
                                    bool CreateMissingDirectories) {
-  std::string Error, OutputPathName, TempPathName;
-  llvm::raw_fd_ostream *OS = createOutputFile(OutputPath, Error, Binary,
-                                              RemoveFileOnSignal,
-                                              InFile, Extension,
-                                              UseTemporary,
-                                              CreateMissingDirectories,
-                                              &OutputPathName,
-                                              &TempPathName);
+  std::string OutputPathName, TempPathName;
+  std::error_code EC;
+  llvm::raw_fd_ostream *OS = createOutputFile(
+      OutputPath, EC, Binary, RemoveFileOnSignal, InFile, Extension,
+      UseTemporary, CreateMissingDirectories, &OutputPathName, &TempPathName);
   if (!OS) {
-    getDiagnostics().Report(diag::err_fe_unable_to_open_output)
-      << OutputPath << Error;
+    getDiagnostics().Report(diag::err_fe_unable_to_open_output) << OutputPath
+                                                                << EC.message();
     return nullptr;
   }
 
@@ -591,17 +596,11 @@ CompilerInstance::createOutputFile(StringRef OutputPath,
   return OS;
 }
 
-llvm::raw_fd_ostream *
-CompilerInstance::createOutputFile(StringRef OutputPath,
-                                   std::string &Error,
-                                   bool Binary,
-                                   bool RemoveFileOnSignal,
-                                   StringRef InFile,
-                                   StringRef Extension,
-                                   bool UseTemporary,
-                                   bool CreateMissingDirectories,
-                                   std::string *ResultPathName,
-                                   std::string *TempPathName) {
+llvm::raw_fd_ostream *CompilerInstance::createOutputFile(
+    StringRef OutputPath, std::error_code &Error, bool Binary,
+    bool RemoveFileOnSignal, StringRef InFile, StringRef Extension,
+    bool UseTemporary, bool CreateMissingDirectories,
+    std::string *ResultPathName, std::string *TempPathName) {
   assert((!CreateMissingDirectories || UseTemporary) &&
          "CreateMissingDirectories is only allowed when using temporary files");
 
@@ -670,9 +669,9 @@ CompilerInstance::createOutputFile(StringRef OutputPath,
   if (!OS) {
     OSFile = OutFile;
     OS.reset(new llvm::raw_fd_ostream(
-        OSFile.c_str(), Error,
+        OSFile, Error,
         (Binary ? llvm::sys::fs::F_None : llvm::sys::fs::F_Text)));
-    if (!Error.empty())
+    if (Error)
       return nullptr;
   }
 
@@ -705,7 +704,8 @@ bool CompilerInstance::InitializeSourceManager(const FrontendInputFile &Input,
     Kind = Input.isSystem() ? SrcMgr::C_System : SrcMgr::C_User;
 
   if (Input.isBuffer()) {
-    SourceMgr.setMainFileID(SourceMgr.createFileID(Input.getBuffer(), Kind));
+    SourceMgr.setMainFileID(SourceMgr.createFileID(
+        std::unique_ptr<llvm::MemoryBuffer>(Input.getBuffer()), Kind));
     assert(!SourceMgr.getMainFileID().isInvalid() &&
            "Couldn't establish MainFileID!");
     return true;
@@ -727,14 +727,14 @@ bool CompilerInstance::InitializeSourceManager(const FrontendInputFile &Input,
     // pick up the correct size, and simply override their contents as we do for
     // STDIN.
     if (File->isNamedPipe()) {
-      std::string ErrorStr;
-      if (llvm::MemoryBuffer *MB =
-              FileMgr.getBufferForFile(File, &ErrorStr, /*isVolatile=*/true)) {
+      auto MB = FileMgr.getBufferForFile(File, /*isVolatile=*/true);
+      if (MB) {
         // Create a new virtual file that will have the correct size.
-        File = FileMgr.getVirtualFile(InputFile, MB->getBufferSize(), 0);
-        SourceMgr.overrideFileContents(File, MB);
+        File = FileMgr.getVirtualFile(InputFile, (*MB)->getBufferSize(), 0);
+        SourceMgr.overrideFileContents(File, std::move(*MB));
       } else {
-        Diags.Report(diag::err_cannot_open_file) << InputFile << ErrorStr;
+        Diags.Report(diag::err_cannot_open_file) << InputFile
+                                                 << MB.getError().message();
         return false;
       }
     }
@@ -754,7 +754,7 @@ bool CompilerInstance::InitializeSourceManager(const FrontendInputFile &Input,
                                                    SB->getBufferSize(), 0);
     SourceMgr.setMainFileID(
         SourceMgr.createFileID(File, SourceLocation(), Kind));
-    SourceMgr.overrideFileContents(File, SB.release());
+    SourceMgr.overrideFileContents(File, std::move(SB));
   }
 
   assert(!SourceMgr.getMainFileID().isInvalid() &&
@@ -802,8 +802,9 @@ bool CompilerInstance::ExecuteAction(FrontendAction &Act) {
     llvm::EnableStatistics();
 
   for (unsigned i = 0, e = getFrontendOpts().Inputs.size(); i != e; ++i) {
-    // Reset the ID tables if we are reusing the SourceManager.
-    if (hasSourceManager())
+    // Reset the ID tables if we are reusing the SourceManager and parsing
+    // regular files.
+    if (hasSourceManager() && !Act.isModelParsingAction())
       getSourceManager().clearIDTables();
 
     if (Act.BeginSourceFile(*this, getFrontendOpts().Inputs[i])) {
@@ -951,17 +952,22 @@ static bool compileModuleImpl(CompilerInstance &ImportingInstance,
     FrontendOpts.Inputs.push_back(
         FrontendInputFile("__inferred_module.map", IK));
 
-    llvm::MemoryBuffer *ModuleMapBuffer =
+    std::unique_ptr<llvm::MemoryBuffer> ModuleMapBuffer =
         llvm::MemoryBuffer::getMemBuffer(InferredModuleMapContent);
     ModuleMapFile = Instance.getFileManager().getVirtualFile(
         "__inferred_module.map", InferredModuleMapContent.size(), 0);
-    SourceMgr.overrideFileContents(ModuleMapFile, ModuleMapBuffer);
+    SourceMgr.overrideFileContents(ModuleMapFile, std::move(ModuleMapBuffer));
   }
 
-  // Construct a module-generating action. Passing through Module->ModuleMap is
+  // Construct a module-generating action. Passing through the module map is
   // safe because the FileManager is shared between the compiler instances.
-  GenerateModuleAction CreateModuleAction(Module->ModuleMap, Module->IsSystem);
-  
+  GenerateModuleAction CreateModuleAction(
+      ModMap.getModuleMapFileForUniquing(Module), Module->IsSystem);
+
+  ImportingInstance.getDiagnostics().Report(ImportLoc,
+                                            diag::remark_module_build)
+    << Module->Name << ModuleFileName;
+
   // Execute the action to actually build the module in-place. Use a separate
   // thread so that we get a stack large enough.
   const unsigned ThreadStackSize = 8 << 20;
@@ -969,6 +975,10 @@ static bool compileModuleImpl(CompilerInstance &ImportingInstance,
   CRC.RunSafelyOnThread([&]() { Instance.ExecuteAction(CreateModuleAction); },
                         ThreadStackSize);
 
+  ImportingInstance.getDiagnostics().Report(ImportLoc,
+                                            diag::remark_module_build_done)
+    << Module->Name;
+
   // Delete the temporary module map file.
   // FIXME: Even though we're executing under crash protection, it would still
   // be nice to do this with RemoveFileOnSignal when we can. However, that
@@ -988,9 +998,10 @@ static bool compileAndLoadModule(CompilerInstance &ImportingInstance,
                                  SourceLocation ImportLoc,
                                  SourceLocation ModuleNameLoc, Module *Module,
                                  StringRef ModuleFileName) {
+  DiagnosticsEngine &Diags = ImportingInstance.getDiagnostics();
+
   auto diagnoseBuildFailure = [&] {
-    ImportingInstance.getDiagnostics().Report(ModuleNameLoc,
-                                              diag::err_module_not_built)
+    Diags.Report(ModuleNameLoc, diag::err_module_not_built)
         << Module->Name << SourceRange(ImportLoc, ModuleNameLoc);
   };
 
@@ -1004,6 +1015,8 @@ static bool compileAndLoadModule(CompilerInstance &ImportingInstance,
     llvm::LockFileManager Locked(ModuleFileName);
     switch (Locked) {
     case llvm::LockFileManager::LFS_Error:
+      Diags.Report(ModuleNameLoc, diag::err_module_lock_failure)
+          << Module->Name;
       return false;
 
     case llvm::LockFileManager::LFS_Owned:
@@ -1027,7 +1040,7 @@ static bool compileAndLoadModule(CompilerInstance &ImportingInstance,
     // Try to read the module file, now that we've compiled it.
     ASTReader::ASTReadResult ReadResult =
         ImportingInstance.getModuleManager()->ReadAST(
-            ModuleFileName, serialization::MK_Module, ImportLoc,
+            ModuleFileName, serialization::MK_ImplicitModule, ImportLoc,
             ModuleLoadCapabilities);
 
     if (ReadResult == ASTReader::OutOfDate &&
@@ -1038,6 +1051,10 @@ static bool compileAndLoadModule(CompilerInstance &ImportingInstance,
       continue;
     } else if (ReadResult == ASTReader::Missing) {
       diagnoseBuildFailure();
+    } else if (ReadResult != ASTReader::Success &&
+               !Diags.hasErrorOccurred()) {
+      // The ASTReader didn't diagnose the error, so conservatively report it.
+      diagnoseBuildFailure();
     }
     return ReadResult == ASTReader::Success;
   }
@@ -1131,9 +1148,8 @@ static void checkConfigMacro(Preprocessor &PP, StringRef ConfigMacro,
 
 /// \brief Write a new timestamp file with the given path.
 static void writeTimestampFile(StringRef TimestampFile) {
-  std::string ErrorInfo;
-  llvm::raw_fd_ostream Out(TimestampFile.str().c_str(), ErrorInfo,
-                           llvm::sys::fs::F_None);
+  std::error_code EC;
+  llvm::raw_fd_ostream Out(TimestampFile.str(), EC, llvm::sys::fs::F_None);
 }
 
 /// \brief Prune the module cache of modules that haven't been accessed in
@@ -1251,6 +1267,65 @@ void CompilerInstance::createModuleManager() {
   }
 }
 
+bool CompilerInstance::loadModuleFile(StringRef FileName) {
+  // Helper to recursively read the module names for all modules we're adding.
+  // We mark these as known and redirect any attempt to load that module to
+  // the files we were handed.
+  struct ReadModuleNames : ASTReaderListener {
+    CompilerInstance &CI;
+    std::vector<StringRef> ModuleFileStack;
+    bool Failed;
+    bool TopFileIsModule;
+
+    ReadModuleNames(CompilerInstance &CI)
+        : CI(CI), Failed(false), TopFileIsModule(false) {}
+
+    bool needsImportVisitation() const override { return true; }
+
+    void visitImport(StringRef FileName) override {
+      ModuleFileStack.push_back(FileName);
+      if (ASTReader::readASTFileControlBlock(FileName, CI.getFileManager(),
+                                             *this)) {
+        CI.getDiagnostics().Report(SourceLocation(),
+                                   diag::err_module_file_not_found)
+            << FileName;
+        // FIXME: Produce a note stack explaining how we got here.
+        Failed = true;
+      }
+      ModuleFileStack.pop_back();
+    }
+
+    void ReadModuleName(StringRef ModuleName) override {
+      if (ModuleFileStack.size() == 1)
+        TopFileIsModule = true;
+
+      auto &ModuleFile = CI.ModuleFileOverrides[ModuleName];
+      if (!ModuleFile.empty() &&
+          CI.getFileManager().getFile(ModuleFile) !=
+              CI.getFileManager().getFile(ModuleFileStack.back()))
+        CI.getDiagnostics().Report(SourceLocation(),
+                                   diag::err_conflicting_module_files)
+            << ModuleName << ModuleFile << ModuleFileStack.back();
+      ModuleFile = ModuleFileStack.back();
+    }
+  } RMN(*this);
+
+  RMN.visitImport(FileName);
+
+  if (RMN.Failed)
+    return false;
+
+  // If we never found a module name for the top file, then it's not a module,
+  // it's a PCH or preamble or something.
+  if (!RMN.TopFileIsModule) {
+    getDiagnostics().Report(SourceLocation(), diag::err_module_file_not_module)
+      << FileName;
+    return false;
+  }
+
+  return true;
+}
+
 ModuleLoadResult
 CompilerInstance::loadModule(SourceLocation ImportLoc,
                              ModuleIdPath Path,
@@ -1265,7 +1340,8 @@ CompilerInstance::loadModule(SourceLocation ImportLoc,
   // when both the preprocessor and parser see the same import declaration.
   if (!ImportLoc.isInvalid() && LastModuleImportLoc == ImportLoc) {
     // Make the named module visible.
-    if (LastModuleImportResult && ModuleName != getLangOpts().CurrentModule)
+    if (LastModuleImportResult && ModuleName != getLangOpts().CurrentModule &&
+        ModuleName != getLangOpts().ImplementationOfModule)
       ModuleManager->makeModuleVisible(LastModuleImportResult, Visibility,
                                        ImportLoc, /*Complain=*/false);
     return LastModuleImportResult;
@@ -1279,7 +1355,8 @@ CompilerInstance::loadModule(SourceLocation ImportLoc,
   if (Known != KnownModules.end()) {
     // Retrieve the cached top-level module.
     Module = Known->second;    
-  } else if (ModuleName == getLangOpts().CurrentModule) {
+  } else if (ModuleName == getLangOpts().CurrentModule ||
+             ModuleName == getLangOpts().ImplementationOfModule) {
     // This is the module we're building. 
     Module = PP->getHeaderSearchInfo().lookupModule(ModuleName);
     Known = KnownModules.insert(std::make_pair(Path[0].first, Module)).first;
@@ -1294,8 +1371,12 @@ CompilerInstance::loadModule(SourceLocation ImportLoc,
       return ModuleLoadResult();
     }
 
+    auto Override = ModuleFileOverrides.find(ModuleName);
+    bool Explicit = Override != ModuleFileOverrides.end();
+
     std::string ModuleFileName =
-        PP->getHeaderSearchInfo().getModuleFileName(Module);
+        Explicit ? Override->second
+                 : PP->getHeaderSearchInfo().getModuleFileName(Module);
 
     // If we don't already have an ASTReader, create one now.
     if (!ModuleManager)
@@ -1311,14 +1392,24 @@ CompilerInstance::loadModule(SourceLocation ImportLoc,
       Listener->attachToASTReader(*ModuleManager);
 
     // Try to load the module file.
-    unsigned ARRFlags = ASTReader::ARR_OutOfDate | ASTReader::ARR_Missing;
-    switch (ModuleManager->ReadAST(ModuleFileName, serialization::MK_Module,
+    unsigned ARRFlags =
+        Explicit ? 0 : ASTReader::ARR_OutOfDate | ASTReader::ARR_Missing;
+    switch (ModuleManager->ReadAST(ModuleFileName,
+                                   Explicit ? serialization::MK_ExplicitModule
+                                            : serialization::MK_ImplicitModule,
                                    ImportLoc, ARRFlags)) {
     case ASTReader::Success:
       break;
 
     case ASTReader::OutOfDate:
     case ASTReader::Missing: {
+      if (Explicit) {
+        // ReadAST has already complained for us.
+        ModuleLoader::HadFatalFailure = true;
+        KnownModules[Path[0].first] = nullptr;
+        return ModuleLoadResult();
+      }
+
       // The module file is missing or out-of-date. Build it.
       assert(Module && "missing module file");
       // Check whether there is a cycle in the module graph.
@@ -1342,9 +1433,6 @@ CompilerInstance::loadModule(SourceLocation ImportLoc,
         return ModuleLoadResult();
       }
 
-      getDiagnostics().Report(ImportLoc, diag::remark_module_build)
-          << ModuleName << ModuleFileName;
-
       // Check whether we have already attempted to build this module (but
       // failed).
       if (getPreprocessorOpts().FailedModules &&
@@ -1359,6 +1447,8 @@ CompilerInstance::loadModule(SourceLocation ImportLoc,
       // Try to compile and then load the module.
       if (!compileAndLoadModule(*this, ImportLoc, ModuleNameLoc, Module,
                                 ModuleFileName)) {
+        assert(getDiagnostics().hasErrorOccurred() &&
+               "undiagnosed error in compileAndLoadModule");
         if (getPreprocessorOpts().FailedModules)
           getPreprocessorOpts().FailedModules->addFailed(ModuleName);
         KnownModules[Path[0].first] = nullptr;
@@ -1448,6 +1538,10 @@ CompilerInstance::loadModule(SourceLocation ImportLoc,
       Module = Sub;
     }
   }
+
+  // Don't make the module visible if we are in the implementation.
+  if (ModuleName == getLangOpts().ImplementationOfModule)
+    return ModuleLoadResult(Module, false);
   
   // Make the named module visible, if it's not already part of the module
   // we are parsing.
@@ -1468,7 +1562,7 @@ CompilerInstance::loadModule(SourceLocation ImportLoc,
 
     // Check whether this module is available.
     clang::Module::Requirement Requirement;
-    clang::Module::HeaderDirective MissingHeader;
+    clang::Module::UnresolvedHeaderDirective MissingHeader;
     if (!Module->isAvailable(getLangOpts(), getTarget(), Requirement,
                              MissingHeader)) {
       if (MissingHeader.FileNameLoc.isValid()) {
@@ -1497,9 +1591,16 @@ CompilerInstance::loadModule(SourceLocation ImportLoc,
                      Module, ImportLoc);
   }
 
+  // Determine whether we're in the #include buffer for a module. The #includes
+  // in that buffer do not qualify as module imports; they're just an
+  // implementation detail of us building the module.
+  bool IsInModuleIncludes = !getLangOpts().CurrentModule.empty() &&
+                            getSourceManager().getFileID(ImportLoc) ==
+                                getSourceManager().getMainFileID();
+
   // If this module import was due to an inclusion directive, create an 
   // implicit import declaration to capture it in the AST.
-  if (IsInclusionDirective && hasASTContext()) {
+  if (IsInclusionDirective && hasASTContext() && !IsInModuleIncludes) {
     TranslationUnitDecl *TU = getASTContext().getTranslationUnitDecl();
     ImportDecl *ImportD = ImportDecl::CreateImplicit(getASTContext(), TU,
                                                      ImportLoc, Module,
@@ -1602,3 +1703,4 @@ CompilerInstance::lookupMissingImports(StringRef Name,
 
   return false;
 }
+void CompilerInstance::resetAndLeakSema() { BuryPointer(takeSema()); }
diff --git a/contrib/llvm/tools/clang/lib/Frontend/CompilerInvocation.cpp b/contrib/llvm/tools/clang/lib/Frontend/CompilerInvocation.cpp
index 7b94132..54025b0 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/CompilerInvocation.cpp
@@ -10,6 +10,7 @@
 #include "clang/Frontend/CompilerInvocation.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/Version.h"
+#include "clang/Config/config.h"
 #include "clang/Driver/DriverDiagnostic.h"
 #include "clang/Driver/Options.h"
 #include "clang/Driver/Util.h"
@@ -19,8 +20,8 @@
 #include "clang/Lex/HeaderSearchOptions.h"
 #include "clang/Serialization/ASTReader.h"
 #include "llvm/ADT/Hashing.h"
-#include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/ADT/SmallVector.h"
 #include "llvm/ADT/StringExtras.h"
 #include "llvm/ADT/StringSwitch.h"
 #include "llvm/ADT/Triple.h"
@@ -215,6 +216,8 @@ static bool ParseAnalyzerArgs(AnalyzerOptions &Opts, ArgList &Args,
   }
 
   Opts.ShowCheckerHelp = Args.hasArg(OPT_analyzer_checker_help);
+  Opts.DisableAllChecks = Args.hasArg(OPT_analyzer_disable_all_checks);
+
   Opts.visualizeExplodedGraphWithGraphViz =
     Args.hasArg(OPT_analyzer_viz_egraph_graphviz);
   Opts.visualizeExplodedGraphWithUbiGraph =
@@ -322,21 +325,38 @@ GenerateOptimizationRemarkRegex(DiagnosticsEngine &Diags, ArgList &Args,
   return Pattern;
 }
 
+static void parseSanitizerKinds(StringRef FlagName,
+                                const std::vector<std::string> &Sanitizers,
+                                DiagnosticsEngine &Diags, SanitizerSet &S) {
+  for (const auto &Sanitizer : Sanitizers) {
+    SanitizerKind K = llvm::StringSwitch<SanitizerKind>(Sanitizer)
+#define SANITIZER(NAME, ID) .Case(NAME, SanitizerKind::ID)
+#include "clang/Basic/Sanitizers.def"
+                          .Default(SanitizerKind::Unknown);
+    if (K == SanitizerKind::Unknown)
+      Diags.Report(diag::err_drv_invalid_value) << FlagName << Sanitizer;
+    else
+      S.set(K, true);
+  }
+}
+
 static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
                              DiagnosticsEngine &Diags,
                              const TargetOptions &TargetOpts) {
   using namespace options;
   bool Success = true;
 
-  Opts.OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
+  unsigned OptimizationLevel = getOptimizationLevel(Args, IK, Diags);
   // TODO: This could be done in Driver
   unsigned MaxOptLevel = 3;
-  if (Opts.OptimizationLevel > MaxOptLevel) {
-    // If the optimization level is not supported, fall back on the default optimization
+  if (OptimizationLevel > MaxOptLevel) {
+    // If the optimization level is not supported, fall back on the default
+    // optimization
     Diags.Report(diag::warn_drv_optimization_value)
         << Args.getLastArg(OPT_O)->getAsString(Args) << "-O" << MaxOptLevel;
-    Opts.OptimizationLevel = MaxOptLevel;
+    OptimizationLevel = MaxOptLevel;
   }
+  Opts.OptimizationLevel = OptimizationLevel;
 
   // We must always run at least the always inlining pass.
   Opts.setInlining(
@@ -399,6 +419,8 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   Opts.SampleProfileFile = Args.getLastArgValue(OPT_fprofile_sample_use_EQ);
   Opts.ProfileInstrGenerate = Args.hasArg(OPT_fprofile_instr_generate);
   Opts.InstrProfileInput = Args.getLastArgValue(OPT_fprofile_instr_use_EQ);
+  Opts.CoverageMapping = Args.hasArg(OPT_fcoverage_mapping);
+  Opts.DumpCoverageMapping = Args.hasArg(OPT_dump_coverage_mapping);
   Opts.AsmVerbose = Args.hasArg(OPT_masm_verbose);
   Opts.ObjCAutoRefCountExceptions = Args.hasArg(OPT_fobjc_arc_exceptions);
   Opts.CUDAIsDevice = Args.hasArg(OPT_fcuda_is_device);
@@ -413,16 +435,19 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   Opts.LessPreciseFPMAD = Args.hasArg(OPT_cl_mad_enable);
   Opts.LimitFloatPrecision = Args.getLastArgValue(OPT_mlimit_float_precision);
   Opts.NoInfsFPMath = (Args.hasArg(OPT_menable_no_infinities) ||
-                       Args.hasArg(OPT_cl_finite_math_only)||
+                       Args.hasArg(OPT_cl_finite_math_only) ||
                        Args.hasArg(OPT_cl_fast_relaxed_math));
   Opts.NoNaNsFPMath = (Args.hasArg(OPT_menable_no_nans) ||
-                       Args.hasArg(OPT_cl_finite_math_only)||
+                       Args.hasArg(OPT_cl_unsafe_math_optimizations) ||
+                       Args.hasArg(OPT_cl_finite_math_only) ||
                        Args.hasArg(OPT_cl_fast_relaxed_math));
+  Opts.NoSignedZeros = Args.hasArg(OPT_cl_no_signed_zeros);
   Opts.NoZeroInitializedInBSS = Args.hasArg(OPT_mno_zero_initialized_in_bss);
   Opts.BackendOptions = Args.getAllArgValues(OPT_backend_option);
   Opts.NumRegisterParameters = getLastArgIntValue(Args, OPT_mregparm, 0, Diags);
   Opts.NoGlobalMerge = Args.hasArg(OPT_mno_global_merge);
   Opts.NoExecStack = Args.hasArg(OPT_mno_exec_stack);
+  Opts.FatalWarnings = Args.hasArg(OPT_massembler_fatal_warnings);
   Opts.EnableSegmentedStacks = Args.hasArg(OPT_split_stacks);
   Opts.RelaxAll = Args.hasArg(OPT_mrelax_all);
   Opts.OmitLeafFramePointer = Args.hasArg(OPT_momit_leaf_frame_pointer);
@@ -435,6 +460,11 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
                       Args.hasArg(OPT_cl_fast_relaxed_math);
   Opts.UnwindTables = Args.hasArg(OPT_munwind_tables);
   Opts.RelocationModel = Args.getLastArgValue(OPT_mrelocation_model, "pic");
+  Opts.ThreadModel = Args.getLastArgValue(OPT_mthread_model, "posix");
+  if (Opts.ThreadModel != "posix" && Opts.ThreadModel != "single")
+    Diags.Report(diag::err_drv_invalid_value)
+        << Args.getLastArg(OPT_mthread_model)->getAsString(Args)
+        << Opts.ThreadModel;
   Opts.TrapFuncName = Args.getLastArgValue(OPT_ftrap_function_EQ);
   Opts.UseInitArray = Args.hasArg(OPT_fuse_init_array);
 
@@ -442,6 +472,7 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
                                        OPT_fno_function_sections, false);
   Opts.DataSections = Args.hasFlag(OPT_fdata_sections,
                                    OPT_fno_data_sections, false);
+  Opts.MergeFunctions = Args.hasArg(OPT_fmerge_functions);
 
   Opts.VectorizeBB = Args.hasArg(OPT_vectorize_slp_aggressive);
   Opts.VectorizeLoop = Args.hasArg(OPT_vectorize_loops);
@@ -449,13 +480,12 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
 
   Opts.MainFileName = Args.getLastArgValue(OPT_main_file_name);
   Opts.VerifyModule = !Args.hasArg(OPT_disable_llvm_verifier);
-  Opts.SanitizeRecover = !Args.hasArg(OPT_fno_sanitize_recover);
 
   Opts.DisableGCov = Args.hasArg(OPT_test_coverage);
   Opts.EmitGcovArcs = Args.hasArg(OPT_femit_coverage_data);
   Opts.EmitGcovNotes = Args.hasArg(OPT_femit_coverage_notes);
   if (Opts.EmitGcovArcs || Opts.EmitGcovNotes) {
-  Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
+    Opts.CoverageFile = Args.getLastArgValue(OPT_coverage_file);
     Opts.CoverageExtraChecksum = Args.hasArg(OPT_coverage_cfg_checksum);
     Opts.CoverageNoFunctionNamesInData =
         Args.hasArg(OPT_coverage_no_function_names_in_data);
@@ -477,7 +507,8 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
   Opts.CompressDebugSections = Args.hasArg(OPT_compress_debug_sections);
   Opts.DebugCompilationDir = Args.getLastArgValue(OPT_fdebug_compilation_dir);
   Opts.LinkBitcodeFile = Args.getLastArgValue(OPT_mlink_bitcode_file);
-  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
+  Opts.SanitizeCoverage =
+      getLastArgIntValue(Args, OPT_fsanitize_coverage, 0, Diags);
   Opts.SanitizeMemoryTrackOrigins =
       getLastArgIntValue(Args, OPT_fsanitize_memory_track_origins_EQ, 0, Diags);
   Opts.SanitizeUndefinedTrapOnError =
@@ -566,11 +597,25 @@ static bool ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args, InputKind IK,
     NeedLocTracking = true;
   }
 
-  // If the user requested one of the flags in the -Rpass family, make sure
-  // that the backend tracks source location information.
+  // If the user requested to use a sample profile for PGO, then the
+  // backend will need to track source location information so the profile
+  // can be incorporated into the IR.
+  if (!Opts.SampleProfileFile.empty())
+    NeedLocTracking = true;
+
+  // If the user requested a flag that requires source locations available in
+  // the backend, make sure that the backend tracks source location information.
   if (NeedLocTracking && Opts.getDebugInfo() == CodeGenOptions::NoDebugInfo)
     Opts.setDebugInfo(CodeGenOptions::LocTrackingOnly);
 
+  Opts.RewriteMapFiles = Args.getAllArgValues(OPT_frewrite_map_file);
+
+  // Parse -fsanitize-recover= arguments.
+  // FIXME: Report unrecoverable sanitizers incorrectly specified here.
+  parseSanitizerKinds("-fsanitize-recover=",
+                      Args.getAllArgValues(OPT_fsanitize_recover_EQ), Diags,
+                      Opts.SanitizeRecover);
+
   return Success;
 }
 
@@ -597,8 +642,9 @@ bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
   bool Success = true;
 
   Opts.DiagnosticLogFile = Args.getLastArgValue(OPT_diagnostic_log_file);
-  Opts.DiagnosticSerializationFile =
-    Args.getLastArgValue(OPT_diagnostic_serialized_file);
+  if (Arg *A =
+          Args.getLastArg(OPT_diagnostic_serialized_file, OPT__serialize_diags))
+    Opts.DiagnosticSerializationFile = A->getValue();
   Opts.IgnoreWarnings = Args.hasArg(OPT_w);
   Opts.NoRewriteMacros = Args.hasArg(OPT_Wno_rewrite_macros);
   Opts.Pedantic = Args.hasArg(OPT_pedantic);
@@ -686,6 +732,9 @@ bool clang::ParseDiagnosticArgs(DiagnosticOptions &Opts, ArgList &Args,
   Opts.ConstexprBacktraceLimit = getLastArgIntValue(
       Args, OPT_fconstexpr_backtrace_limit,
       DiagnosticOptions::DefaultConstexprBacktraceLimit, Diags);
+  Opts.SpellCheckingLimit = getLastArgIntValue(
+      Args, OPT_fspell_checking_limit,
+      DiagnosticOptions::DefaultSpellCheckingLimit, Diags);
   Opts.TabStop = getLastArgIntValue(Args, OPT_ftabstop,
                                     DiagnosticOptions::DefaultTabStop, Diags);
   if (Opts.TabStop == 0 || Opts.TabStop > DiagnosticOptions::MaxTabStop) {
@@ -716,6 +765,7 @@ static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
     case OPT_ast_list:
       Opts.ProgramAction = frontend::ASTDeclList; break;
     case OPT_ast_dump:
+    case OPT_ast_dump_lookups:
       Opts.ProgramAction = frontend::ASTDump; break;
     case OPT_ast_print:
       Opts.ProgramAction = frontend::ASTPrint; break;
@@ -823,11 +873,14 @@ static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
   Opts.FixOnlyWarnings = Args.hasArg(OPT_fix_only_warnings);
   Opts.FixAndRecompile = Args.hasArg(OPT_fixit_recompile);
   Opts.FixToTemporaries = Args.hasArg(OPT_fixit_to_temp);
+  Opts.ASTDumpDecls = Args.hasArg(OPT_ast_dump);
   Opts.ASTDumpFilter = Args.getLastArgValue(OPT_ast_dump_filter);
   Opts.ASTDumpLookups = Args.hasArg(OPT_ast_dump_lookups);
   Opts.UseGlobalModuleIndex = !Args.hasArg(OPT_fno_modules_global_index);
   Opts.GenerateGlobalModuleIndex = Opts.UseGlobalModuleIndex;
-  
+  Opts.ModuleMapFiles = Args.getAllArgValues(OPT_fmodule_map_file);
+  Opts.ModuleFiles = Args.getAllArgValues(OPT_fmodule_file);
+
   Opts.CodeCompleteOpts.IncludeMacros
     = Args.hasArg(OPT_code_completion_macros);
   Opts.CodeCompleteOpts.IncludeCodePatterns
@@ -866,6 +919,8 @@ static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Literals;
   if (Args.hasArg(OPT_objcmt_migrate_subscripting))
     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Subscripting;
+  if (Args.hasArg(OPT_objcmt_migrate_property_dot_syntax))
+    Opts.ObjCMTAction |= FrontendOptions::ObjCMT_PropertyDotSyntax;
   if (Args.hasArg(OPT_objcmt_migrate_property))
     Opts.ObjCMTAction |= FrontendOptions::ObjCMT_Property;
   if (Args.hasArg(OPT_objcmt_migrate_readonly_property))
@@ -950,14 +1005,19 @@ static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args,
 
 std::string CompilerInvocation::GetResourcesPath(const char *Argv0,
                                                  void *MainAddr) {
-  SmallString<128> P(llvm::sys::fs::getMainExecutable(Argv0, MainAddr));
-
-  if (!P.empty()) {
-    llvm::sys::path::remove_filename(P); // Remove /clang from foo/bin/clang
-    llvm::sys::path::remove_filename(P); // Remove /bin   from foo/bin
-
-    // Get foo/lib/clang/<version>/include
-    llvm::sys::path::append(P, "lib", "clang", CLANG_VERSION_STRING);
+  std::string ClangExecutable =
+      llvm::sys::fs::getMainExecutable(Argv0, MainAddr);
+  StringRef Dir = llvm::sys::path::parent_path(ClangExecutable);
+
+  // Compute the path to the resource directory.
+  StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
+  SmallString<128> P(Dir);
+  if (ClangResourceDir != "") {
+    llvm::sys::path::append(P, ClangResourceDir);
+  } else {
+    StringRef ClangLibdirSuffix(CLANG_LIBDIR_SUFFIX);
+    llvm::sys::path::append(P, "..", Twine("lib") + ClangLibdirSuffix, "clang",
+                            CLANG_VERSION_STRING);
   }
 
   return P.str();
@@ -978,6 +1038,7 @@ static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
   Opts.DisableModuleHash = Args.hasArg(OPT_fdisable_module_hash);
   // -fmodules implies -fmodule-maps
   Opts.ModuleMaps = Args.hasArg(OPT_fmodule_maps) || Args.hasArg(OPT_fmodules);
+  Opts.ModuleMapFileHomeIsCwd = Args.hasArg(OPT_fmodule_map_file_home_is_cwd);
   Opts.ModuleCachePruneInterval =
       getLastArgIntValue(Args, OPT_fmodules_prune_interval, 7 * 24 * 60 * 60);
   Opts.ModuleCachePruneAfter =
@@ -995,9 +1056,6 @@ static void ParseHeaderSearchArgs(HeaderSearchOptions &Opts, ArgList &Args) {
     StringRef MacroDef = (*it)->getValue();
     Opts.ModulesIgnoreMacros.insert(MacroDef.split('=').first);
   }
-  std::vector<std::string> ModuleMapFiles =
-      Args.getAllArgValues(OPT_fmodule_map_file);
-  Opts.ModuleMapFiles.insert(ModuleMapFiles.begin(), ModuleMapFiles.end());
 
   // Add -I..., -F..., and -index-header-map options in order.
   bool IsIndexHeaderMap = false;
@@ -1118,7 +1176,7 @@ void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
     case IK_PreprocessedC:
     case IK_ObjC:
     case IK_PreprocessedObjC:
-      LangStd = LangStandard::lang_gnu99;
+      LangStd = LangStandard::lang_gnu11;
       break;
     case IK_CXX:
     case IK_PreprocessedCXX:
@@ -1135,7 +1193,7 @@ void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
   Opts.C11 = Std.isC11();
   Opts.CPlusPlus = Std.isCPlusPlus();
   Opts.CPlusPlus11 = Std.isCPlusPlus11();
-  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
+  Opts.CPlusPlus14 = Std.isCPlusPlus14();
   Opts.CPlusPlus1z = Std.isCPlusPlus1z();
   Opts.Digraphs = Std.hasDigraphs();
   Opts.GNUMode = Std.isGNUMode();
@@ -1148,10 +1206,12 @@ void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
   if (LangStd == LangStandard::lang_opencl)
     Opts.OpenCLVersion = 100;
   else if (LangStd == LangStandard::lang_opencl11)
-      Opts.OpenCLVersion = 110;
+    Opts.OpenCLVersion = 110;
   else if (LangStd == LangStandard::lang_opencl12)
     Opts.OpenCLVersion = 120;
-  
+  else if (LangStd == LangStandard::lang_opencl20)
+    Opts.OpenCLVersion = 200;
+
   // OpenCL has some additional defaults.
   if (Opts.OpenCL) {
     Opts.AltiVec = 0;
@@ -1175,15 +1235,10 @@ void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
   Opts.GNUKeywords = Opts.GNUMode;
   Opts.CXXOperatorNames = Opts.CPlusPlus;
 
-  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
-  // is specified, or -std is set to a conforming mode.
-  // Trigraphs are disabled by default in c++1z onwards.
-  Opts.Trigraphs = !Opts.GNUMode && !Opts.CPlusPlus1z;
-
   Opts.DollarIdents = !Opts.AsmPreprocessor;
 
-  // C++1y onwards has sized global deallocation functions.
-  Opts.SizedDeallocation = Opts.CPlusPlus1y;
+  // C++14 onwards has sized global deallocation functions.
+  Opts.SizedDeallocation = Opts.CPlusPlus14;
 }
 
 /// Attempt to parse a visibility value out of the given argument.
@@ -1299,6 +1354,7 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
     .Case("CL", LangStandard::lang_opencl)
     .Case("CL1.1", LangStandard::lang_opencl11)
     .Case("CL1.2", LangStandard::lang_opencl12)
+    .Case("CL2.0", LangStandard::lang_opencl20)
     .Default(LangStandard::lang_unspecified);
     
     if (OpenCLLangStd == LangStandard::lang_unspecified) {
@@ -1322,6 +1378,9 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
   if (Args.hasArg(OPT_fno_operator_names))
     Opts.CXXOperatorNames = 0;
 
+  if (Args.hasArg(OPT_fcuda_is_device))
+    Opts.CUDAIsDevice = 1;
+
   if (Opts.ObjC1) {
     if (Arg *arg = Args.getLastArg(OPT_fobjc_runtime_EQ)) {
       StringRef value = arg->getValue();
@@ -1400,17 +1459,22 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
   else if (Args.hasArg(OPT_fwrapv))
     Opts.setSignedOverflowBehavior(LangOptions::SOB_Defined);
 
-  if (Args.hasArg(OPT_trigraphs))
-    Opts.Trigraphs = 1;
+  Opts.MSVCCompat = Args.hasArg(OPT_fms_compatibility);
+  Opts.MicrosoftExt = Opts.MSVCCompat || Args.hasArg(OPT_fms_extensions);
+  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
+  Opts.MSCompatibilityVersion = parseMSCVersion(Args, Diags);
+
+  // Mimicing gcc's behavior, trigraphs are only enabled if -trigraphs
+  // is specified, or -std is set to a conforming mode.
+  // Trigraphs are disabled by default in c++1z onwards.
+  Opts.Trigraphs = !Opts.GNUMode && !Opts.MSVCCompat && !Opts.CPlusPlus1z;
+  Opts.Trigraphs =
+      Args.hasFlag(OPT_ftrigraphs, OPT_fno_trigraphs, Opts.Trigraphs);
 
   Opts.DollarIdents = Args.hasFlag(OPT_fdollars_in_identifiers,
                                    OPT_fno_dollars_in_identifiers,
                                    Opts.DollarIdents);
   Opts.PascalStrings = Args.hasArg(OPT_fpascal_strings);
-  Opts.MSVCCompat = Args.hasArg(OPT_fms_compatibility);
-  Opts.MicrosoftExt = Opts.MSVCCompat || Args.hasArg(OPT_fms_extensions);
-  Opts.AsmBlocks = Args.hasArg(OPT_fasm_blocks) || Opts.MicrosoftExt;
-  Opts.MSCompatibilityVersion = parseMSCVersion(Args, Diags);
   Opts.VtorDispMode = getLastArgIntValue(Args, OPT_vtordisp_mode_EQ, 1, Diags);
   Opts.Borland = Args.hasArg(OPT_fborland_extensions);
   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
@@ -1438,12 +1502,13 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
     !Args.hasArg(OPT_fno_modules_search_all) &&
     Args.hasArg(OPT_fmodules_search_all);
   Opts.ModulesErrorRecovery = !Args.hasArg(OPT_fno_modules_error_recovery);
+  Opts.ModulesImplicitMaps = Args.hasFlag(OPT_fmodules_implicit_maps,
+                                          OPT_fno_modules_implicit_maps, true);
   Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char);
   Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar);
   Opts.ShortWChar = Args.hasFlag(OPT_fshort_wchar, OPT_fno_short_wchar, false);
   Opts.ShortEnums = Args.hasArg(OPT_fshort_enums);
   Opts.Freestanding = Args.hasArg(OPT_ffreestanding);
-  Opts.FormatExtensions = Args.hasArg(OPT_fformat_extensions);
   Opts.NoBuiltin = Args.hasArg(OPT_fno_builtin) || Opts.Freestanding;
   Opts.NoMathBuiltin = Args.hasArg(OPT_fno_math_builtin);
   Opts.AssumeSaneOperatorNew = !Args.hasArg(OPT_fno_assume_sane_operator_new);
@@ -1473,6 +1538,7 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
     Args.hasArg(OPT_fencode_extended_block_signature);
   Opts.EmitAllDecls = Args.hasArg(OPT_femit_all_decls);
   Opts.PackStruct = getLastArgIntValue(Args, OPT_fpack_struct_EQ, 0, Diags);
+  Opts.MaxTypeAlign = getLastArgIntValue(Args, OPT_fmax_type_align_EQ, 0, Diags);
   Opts.PICLevel = getLastArgIntValue(Args, OPT_pic_level, 0, Diags);
   Opts.PIELevel = getLastArgIntValue(Args, OPT_pie_level, 0, Diags);
   Opts.Static = Args.hasArg(OPT_static_define);
@@ -1493,6 +1559,16 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
   Opts.DebuggerObjCLiteral = Args.hasArg(OPT_fdebugger_objc_literal);
   Opts.ApplePragmaPack = Args.hasArg(OPT_fapple_pragma_pack);
   Opts.CurrentModule = Args.getLastArgValue(OPT_fmodule_name);
+  Opts.ImplementationOfModule =
+      Args.getLastArgValue(OPT_fmodule_implementation_of);
+  Opts.NativeHalfType = Opts.NativeHalfType;
+  Opts.HalfArgsAndReturns = Args.hasArg(OPT_fallow_half_arguments_and_returns);
+
+  if (!Opts.CurrentModule.empty() && !Opts.ImplementationOfModule.empty() &&
+      Opts.CurrentModule != Opts.ImplementationOfModule) {
+    Diags.Report(diag::err_conflicting_module_names)
+        << Opts.CurrentModule << Opts.ImplementationOfModule;
+  }
 
   if (Arg *A = Args.getLastArg(OPT_faddress_space_map_mangling_EQ)) {
     switch (llvm::StringSwitch<unsigned>(A->getValue())
@@ -1557,8 +1633,11 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
   // inlining enabled.
   Opts.NoInlineDefine = !Opt || Args.hasArg(OPT_fno_inline);
 
-  Opts.FastMath = Args.hasArg(OPT_ffast_math);
-  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only);
+  Opts.FastMath = Args.hasArg(OPT_ffast_math) ||
+      Args.hasArg(OPT_cl_fast_relaxed_math);
+  Opts.FiniteMathOnly = Args.hasArg(OPT_ffinite_math_only) ||
+      Args.hasArg(OPT_cl_finite_math_only) ||
+      Args.hasArg(OPT_cl_fast_relaxed_math);
 
   Opts.RetainCommentsFromSystemHeaders =
       Args.hasArg(OPT_fretain_comments_from_system_headers);
@@ -1576,35 +1655,12 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
   }
 
   // Parse -fsanitize= arguments.
-  std::vector<std::string> Sanitizers = Args.getAllArgValues(OPT_fsanitize_EQ);
-  for (unsigned I = 0, N = Sanitizers.size(); I != N; ++I) {
-    // Since the Opts.Sanitize* values are bitfields, it's a little tricky to
-    // efficiently map string values to them. Perform the mapping indirectly:
-    // convert strings to enumerated values, then switch over the enum to set
-    // the right bitfield value.
-    enum Sanitizer {
-#define SANITIZER(NAME, ID) \
-      ID,
-#include "clang/Basic/Sanitizers.def"
-      Unknown
-    };
-    switch (llvm::StringSwitch<unsigned>(Sanitizers[I])
-#define SANITIZER(NAME, ID) \
-              .Case(NAME, ID)
-#include "clang/Basic/Sanitizers.def"
-              .Default(Unknown)) {
-#define SANITIZER(NAME, ID) \
-    case ID: \
-      Opts.Sanitize.ID = true; \
-      break;
-#include "clang/Basic/Sanitizers.def"
-
-    case Unknown:
-      Diags.Report(diag::err_drv_invalid_value)
-        << "-fsanitize=" << Sanitizers[I];
-      break;
-    }
-  }
+  parseSanitizerKinds("-fsanitize=", Args.getAllArgValues(OPT_fsanitize_EQ),
+                      Diags, Opts.Sanitize);
+  // -fsanitize-address-field-padding=N has to be a LangOpt, parse it here.
+  Opts.SanitizeAddressFieldPadding =
+      getLastArgIntValue(Args, OPT_fsanitize_address_field_padding, 0, Diags);
+  Opts.SanitizerBlacklistFile = Args.getLastArgValue(OPT_fsanitize_blacklist);
 }
 
 static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
@@ -2022,7 +2078,7 @@ createVFSFromCompilerInvocation(const CompilerInvocation &CI,
     }
 
     IntrusiveRefCntPtr<vfs::FileSystem> FS =
-        vfs::getVFSFromYAML(Buffer->release(), /*DiagHandler*/ nullptr);
+        vfs::getVFSFromYAML(std::move(Buffer.get()), /*DiagHandler*/ nullptr);
     if (!FS.get()) {
       Diags.Report(diag::err_invalid_vfs_overlay) << File;
       return IntrusiveRefCntPtr<vfs::FileSystem>();
diff --git a/contrib/llvm/tools/clang/lib/Frontend/CreateInvocationFromCommandLine.cpp b/contrib/llvm/tools/clang/lib/Frontend/CreateInvocationFromCommandLine.cpp
index f2f36e4..4a8a8a0 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/CreateInvocationFromCommandLine.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/CreateInvocationFromCommandLine.cpp
@@ -71,13 +71,13 @@ clang::createInvocationFromCommandLine(ArrayRef<const char *> ArgList,
     return nullptr;
   }
 
-  const driver::Command *Cmd = cast<driver::Command>(*Jobs.begin());
-  if (StringRef(Cmd->getCreator().getName()) != "clang") {
+  const driver::Command &Cmd = cast<driver::Command>(*Jobs.begin());
+  if (StringRef(Cmd.getCreator().getName()) != "clang") {
     Diags->Report(diag::err_fe_expected_clang_command);
     return nullptr;
   }
 
-  const ArgStringList &CCArgs = Cmd->getArguments();
+  const ArgStringList &CCArgs = Cmd.getArguments();
   std::unique_ptr<CompilerInvocation> CI(new CompilerInvocation());
   if (!CompilerInvocation::CreateFromArgs(*CI,
                                      const_cast<const char **>(CCArgs.data()),
diff --git a/contrib/llvm/tools/clang/lib/Frontend/DependencyFile.cpp b/contrib/llvm/tools/clang/lib/Frontend/DependencyFile.cpp
index 0b9c0d4..6ea8f51 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/DependencyFile.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/DependencyFile.cpp
@@ -22,6 +22,7 @@
 #include "clang/Lex/Preprocessor.h"
 #include "clang/Serialization/ASTReader.h"
 #include "llvm/ADT/StringSet.h"
+#include "llvm/ADT/StringSwitch.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/raw_ostream.h"
@@ -108,23 +109,32 @@ struct DepCollectorASTListener : public ASTReaderListener {
 void DependencyCollector::maybeAddDependency(StringRef Filename, bool FromModule,
                                             bool IsSystem, bool IsModuleFile,
                                             bool IsMissing) {
-  if (Seen.insert(Filename) &&
+  if (Seen.insert(Filename).second &&
       sawDependency(Filename, FromModule, IsSystem, IsModuleFile, IsMissing))
     Dependencies.push_back(Filename);
 }
 
+static bool isSpecialFilename(StringRef Filename) {
+  return llvm::StringSwitch<bool>(Filename)
+      .Case("<built-in>", true)
+      .Case("<stdin>", true)
+      .Default(false);
+}
+
 bool DependencyCollector::sawDependency(StringRef Filename, bool FromModule,
                                        bool IsSystem, bool IsModuleFile,
                                        bool IsMissing) {
-  return Filename != "<built-in>" && (needSystemDependencies() || !IsSystem);
+  return !isSpecialFilename(Filename) &&
+         (needSystemDependencies() || !IsSystem);
 }
 
 DependencyCollector::~DependencyCollector() { }
 void DependencyCollector::attachToPreprocessor(Preprocessor &PP) {
-  PP.addPPCallbacks(new DepCollectorPPCallbacks(*this, PP.getSourceManager()));
+  PP.addPPCallbacks(
+      llvm::make_unique<DepCollectorPPCallbacks>(*this, PP.getSourceManager()));
 }
 void DependencyCollector::attachToASTReader(ASTReader &R) {
-  R.addListener(new DepCollectorASTListener(*this));
+  R.addListener(llvm::make_unique<DepCollectorASTListener>(*this));
 }
 
 namespace {
@@ -203,21 +213,21 @@ DependencyFileGenerator *DependencyFileGenerator::CreateAndAttachToPreprocessor(
     PP.SetSuppressIncludeNotFoundError(true);
 
   DFGImpl *Callback = new DFGImpl(&PP, Opts);
-  PP.addPPCallbacks(Callback); // PP owns the Callback
+  PP.addPPCallbacks(std::unique_ptr<PPCallbacks>(Callback));
   return new DependencyFileGenerator(Callback);
 }
 
 void DependencyFileGenerator::AttachToASTReader(ASTReader &R) {
   DFGImpl *I = reinterpret_cast<DFGImpl *>(Impl);
   assert(I && "missing implementation");
-  R.addListener(new DFGASTReaderListener(*I));
+  R.addListener(llvm::make_unique<DFGASTReaderListener>(*I));
 }
 
 /// FileMatchesDepCriteria - Determine whether the given Filename should be
 /// considered as a dependency.
 bool DFGImpl::FileMatchesDepCriteria(const char *Filename,
                                      SrcMgr::CharacteristicKind FileType) {
-  if (strcmp("<built-in>", Filename) == 0)
+  if (isSpecialFilename(Filename))
     return false;
 
   if (IncludeSystemHeaders)
@@ -275,7 +285,7 @@ void DFGImpl::InclusionDirective(SourceLocation HashLoc,
 }
 
 void DFGImpl::AddFilename(StringRef Filename) {
-  if (FilesSet.insert(Filename))
+  if (FilesSet.insert(Filename).second)
     Files.push_back(Filename);
 }
 
@@ -297,11 +307,11 @@ void DFGImpl::OutputDependencyFile() {
     return;
   }
 
-  std::string Err;
-  llvm::raw_fd_ostream OS(OutputFile.c_str(), Err, llvm::sys::fs::F_Text);
-  if (!Err.empty()) {
-    PP->getDiagnostics().Report(diag::err_fe_error_opening)
-      << OutputFile << Err;
+  std::error_code EC;
+  llvm::raw_fd_ostream OS(OutputFile, EC, llvm::sys::fs::F_Text);
+  if (EC) {
+    PP->getDiagnostics().Report(diag::err_fe_error_opening) << OutputFile
+                                                            << EC.message();
     return;
   }
 
diff --git a/contrib/llvm/tools/clang/lib/Frontend/DependencyGraph.cpp b/contrib/llvm/tools/clang/lib/Frontend/DependencyGraph.cpp
index 051b7f9..67a977e 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/DependencyGraph.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/DependencyGraph.cpp
@@ -61,7 +61,8 @@ public:
 
 void clang::AttachDependencyGraphGen(Preprocessor &PP, StringRef OutputFile,
                                      StringRef SysRoot) {
-  PP.addPPCallbacks(new DependencyGraphCallback(&PP, OutputFile, SysRoot));
+  PP.addPPCallbacks(llvm::make_unique<DependencyGraphCallback>(&PP, OutputFile,
+                                                               SysRoot));
 }
 
 void DependencyGraphCallback::InclusionDirective(SourceLocation HashLoc,
@@ -96,11 +97,11 @@ DependencyGraphCallback::writeNodeReference(raw_ostream &OS,
 }
 
 void DependencyGraphCallback::OutputGraphFile() {
-  std::string Err;
-  llvm::raw_fd_ostream OS(OutputFile.c_str(), Err, llvm::sys::fs::F_Text);
-  if (!Err.empty()) {
-    PP->getDiagnostics().Report(diag::err_fe_error_opening)
-      << OutputFile << Err;
+  std::error_code EC;
+  llvm::raw_fd_ostream OS(OutputFile, EC, llvm::sys::fs::F_Text);
+  if (EC) {
+    PP->getDiagnostics().Report(diag::err_fe_error_opening) << OutputFile
+                                                            << EC.message();
     return;
   }
 
diff --git a/contrib/llvm/tools/clang/lib/Frontend/DiagnosticRenderer.cpp b/contrib/llvm/tools/clang/lib/Frontend/DiagnosticRenderer.cpp
index cff32b8..c63e98d 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/DiagnosticRenderer.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/DiagnosticRenderer.cpp
@@ -193,7 +193,7 @@ void DiagnosticRenderer::emitStoredDiagnostic(StoredDiagnostic &Diag) {
 void DiagnosticRenderer::emitBasicNote(StringRef Message) {
   emitDiagnosticMessage(
       SourceLocation(), PresumedLoc(), DiagnosticsEngine::Note, Message,
-      ArrayRef<CharSourceRange>(), nullptr, DiagOrStoredDiag());
+      None, nullptr, DiagOrStoredDiag());
 }
 
 /// \brief Prints an include stack when appropriate for a particular
@@ -509,6 +509,6 @@ DiagnosticNoteRenderer::emitBuildingModuleLocation(SourceLocation Loc,
     Message << "while building module '" << ModuleName << "' imported from "
             << PLoc.getFilename() << ':' << PLoc.getLine() << ":";
   else
-    Message << "while building module '" << ModuleName << ":";
+    Message << "while building module '" << ModuleName << "':";
   emitNote(Loc, Message.str(), &SM);
 }
diff --git a/contrib/llvm/tools/clang/lib/Frontend/FrontendAction.cpp b/contrib/llvm/tools/clang/lib/Frontend/FrontendAction.cpp
index 7910179..c81c81a 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/FrontendAction.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/FrontendAction.cpp
@@ -129,14 +129,15 @@ FrontendAction::FrontendAction() : Instance(nullptr) {}
 FrontendAction::~FrontendAction() {}
 
 void FrontendAction::setCurrentInput(const FrontendInputFile &CurrentInput,
-                                     ASTUnit *AST) {
+                                     std::unique_ptr<ASTUnit> AST) {
   this->CurrentInput = CurrentInput;
-  CurrentASTUnit.reset(AST);
+  CurrentASTUnit = std::move(AST);
 }
 
-ASTConsumer* FrontendAction::CreateWrappedASTConsumer(CompilerInstance &CI,
-                                                      StringRef InFile) {
-  ASTConsumer* Consumer = CreateASTConsumer(CI, InFile);
+std::unique_ptr<ASTConsumer>
+FrontendAction::CreateWrappedASTConsumer(CompilerInstance &CI,
+                                         StringRef InFile) {
+  std::unique_ptr<ASTConsumer> Consumer = CreateASTConsumer(CI, InFile);
   if (!Consumer)
     return nullptr;
 
@@ -145,7 +146,8 @@ ASTConsumer* FrontendAction::CreateWrappedASTConsumer(CompilerInstance &CI,
 
   // Make sure the non-plugin consumer is first, so that plugins can't
   // modifiy the AST.
-  std::vector<ASTConsumer*> Consumers(1, Consumer);
+  std::vector<std::unique_ptr<ASTConsumer>> Consumers;
+  Consumers.push_back(std::move(Consumer));
 
   for (size_t i = 0, e = CI.getFrontendOpts().AddPluginActions.size();
        i != e; ++i) { 
@@ -155,16 +157,15 @@ ASTConsumer* FrontendAction::CreateWrappedASTConsumer(CompilerInstance &CI,
         it = FrontendPluginRegistry::begin(),
         ie = FrontendPluginRegistry::end();
         it != ie; ++it) {
-      if (it->getName() == CI.getFrontendOpts().AddPluginActions[i]) {
-        std::unique_ptr<PluginASTAction> P(it->instantiate());
-        FrontendAction* c = P.get();
-        if (P->ParseArgs(CI, CI.getFrontendOpts().AddPluginArgs[i]))
-          Consumers.push_back(c->CreateASTConsumer(CI, InFile));
-      }
+      if (it->getName() != CI.getFrontendOpts().AddPluginActions[i])
+        continue;
+      std::unique_ptr<PluginASTAction> P = it->instantiate();
+      if (P->ParseArgs(CI, CI.getFrontendOpts().AddPluginArgs[i]))
+        Consumers.push_back(P->CreateASTConsumer(CI, InFile));
     }
   }
 
-  return new MultiplexConsumer(Consumers);
+  return llvm::make_unique<MultiplexConsumer>(std::move(Consumers));
 }
 
 bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
@@ -189,13 +190,12 @@ bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
 
     IntrusiveRefCntPtr<DiagnosticsEngine> Diags(&CI.getDiagnostics());
 
-    ASTUnit *AST = ASTUnit::LoadFromASTFile(InputFile, Diags,
-                                            CI.getFileSystemOpts());
+    std::unique_ptr<ASTUnit> AST =
+        ASTUnit::LoadFromASTFile(InputFile, Diags, CI.getFileSystemOpts());
+
     if (!AST)
       goto failure;
 
-    setCurrentInput(Input, AST);
-
     // Inform the diagnostic client we are processing a source file.
     CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(), nullptr);
     HasBegunSourceFile = true;
@@ -207,6 +207,8 @@ bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
     CI.setPreprocessor(&AST->getPreprocessor());
     CI.setASTContext(&AST->getASTContext());
 
+    setCurrentInput(Input, std::move(AST));
+
     // Initialize the action.
     if (!BeginSourceFileAction(CI, InputFile))
       goto failure;
@@ -285,8 +287,10 @@ bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
     }
   }
 
-  // Set up the preprocessor.
-  CI.createPreprocessor(getTranslationUnitKind());
+  // Set up the preprocessor if needed. When parsing model files the
+  // preprocessor of the original source is reused.
+  if (!isModelParsingAction())
+    CI.createPreprocessor(getTranslationUnitKind());
 
   // Inform the diagnostic client we are processing a source file.
   CI.getDiagnosticClient().BeginSourceFile(CI.getLangOpts(),
@@ -305,15 +309,19 @@ bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
   // Create the AST context and consumer unless this is a preprocessor only
   // action.
   if (!usesPreprocessorOnly()) {
-    CI.createASTContext();
+    // Parsing a model file should reuse the existing ASTContext.
+    if (!isModelParsingAction())
+      CI.createASTContext();
 
-    std::unique_ptr<ASTConsumer> Consumer(
-        CreateWrappedASTConsumer(CI, InputFile));
+    std::unique_ptr<ASTConsumer> Consumer =
+        CreateWrappedASTConsumer(CI, InputFile);
     if (!Consumer)
       goto failure;
 
-    CI.getASTContext().setASTMutationListener(Consumer->GetASTMutationListener());
-    
+    // FIXME: should not overwrite ASTMutationListener when parsing model files?
+    if (!isModelParsingAction())
+      CI.getASTContext().setASTMutationListener(Consumer->GetASTMutationListener());
+
     if (!CI.getPreprocessorOpts().ChainedIncludes.empty()) {
       // Convert headers to PCH and chain them.
       IntrusiveRefCntPtr<ExternalSemaSource> source, FinalReader;
@@ -349,7 +357,7 @@ bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
         goto failure;
     }
 
-    CI.setASTConsumer(Consumer.release());
+    CI.setASTConsumer(std::move(Consumer));
     if (!CI.hasASTConsumer())
       goto failure;
   }
@@ -375,6 +383,11 @@ bool FrontendAction::BeginSourceFile(CompilerInstance &CI,
            "doesn't support modules");
   }
 
+  // If we were asked to load any module files, do so now.
+  for (const auto &ModuleFile : CI.getFrontendOpts().ModuleFiles)
+    if (!CI.loadModuleFile(ModuleFile))
+      goto failure;
+
   // If there is a layout overrides file, attach an external AST source that
   // provides the layouts from that file.
   if (!CI.getFrontendOpts().OverrideRecordLayoutsFile.empty() && 
@@ -432,6 +445,10 @@ void FrontendAction::EndSourceFile() {
   // Inform the diagnostic client we are done with this source file.
   CI.getDiagnosticClient().EndSourceFile();
 
+  // Inform the preprocessor we are done.
+  if (CI.hasPreprocessor())
+    CI.getPreprocessor().EndSourceFile();
+
   // Finalize the action.
   EndSourceFileAction();
 
@@ -444,7 +461,7 @@ void FrontendAction::EndSourceFile() {
       CI.resetAndLeakSema();
       CI.resetAndLeakASTContext();
     }
-    BuryPointer(CI.takeASTConsumer());
+    BuryPointer(CI.takeASTConsumer().get());
   } else {
     if (!isCurrentFileAST()) {
       CI.setSema(nullptr);
@@ -453,10 +470,6 @@ void FrontendAction::EndSourceFile() {
     CI.setASTConsumer(nullptr);
   }
 
-  // Inform the preprocessor we are done.
-  if (CI.hasPreprocessor())
-    CI.getPreprocessor().EndSourceFile();
-
   if (CI.getFrontendOpts().ShowStats) {
     llvm::errs() << "\nSTATISTICS FOR '" << getCurrentFile() << "':\n";
     CI.getPreprocessor().PrintStats();
@@ -516,14 +529,15 @@ void ASTFrontendAction::ExecuteAction() {
 
 void PluginASTAction::anchor() { }
 
-ASTConsumer *
+std::unique_ptr<ASTConsumer>
 PreprocessorFrontendAction::CreateASTConsumer(CompilerInstance &CI,
                                               StringRef InFile) {
   llvm_unreachable("Invalid CreateASTConsumer on preprocessor action!");
 }
 
-ASTConsumer *WrapperFrontendAction::CreateASTConsumer(CompilerInstance &CI,
-                                                      StringRef InFile) {
+std::unique_ptr<ASTConsumer>
+WrapperFrontendAction::CreateASTConsumer(CompilerInstance &CI,
+                                         StringRef InFile) {
   return WrappedAction->CreateASTConsumer(CI, InFile);
 }
 bool WrapperFrontendAction::BeginInvocation(CompilerInstance &CI) {
diff --git a/contrib/llvm/tools/clang/lib/Frontend/FrontendActions.cpp b/contrib/llvm/tools/clang/lib/Frontend/FrontendActions.cpp
index 6dcaf38..701ef02 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/FrontendActions.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/FrontendActions.cpp
@@ -33,9 +33,9 @@ using namespace clang;
 // Custom Actions
 //===----------------------------------------------------------------------===//
 
-ASTConsumer *InitOnlyAction::CreateASTConsumer(CompilerInstance &CI,
-                                               StringRef InFile) {
-  return new ASTConsumer();
+std::unique_ptr<ASTConsumer>
+InitOnlyAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
+  return llvm::make_unique<ASTConsumer>();
 }
 
 void InitOnlyAction::ExecuteAction() {
@@ -45,36 +45,38 @@ void InitOnlyAction::ExecuteAction() {
 // AST Consumer Actions
 //===----------------------------------------------------------------------===//
 
-ASTConsumer *ASTPrintAction::CreateASTConsumer(CompilerInstance &CI,
-                                               StringRef InFile) {
+std::unique_ptr<ASTConsumer>
+ASTPrintAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
   if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
     return CreateASTPrinter(OS, CI.getFrontendOpts().ASTDumpFilter);
   return nullptr;
 }
 
-ASTConsumer *ASTDumpAction::CreateASTConsumer(CompilerInstance &CI,
-                                              StringRef InFile) {
+std::unique_ptr<ASTConsumer>
+ASTDumpAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
   return CreateASTDumper(CI.getFrontendOpts().ASTDumpFilter,
+                         CI.getFrontendOpts().ASTDumpDecls,
                          CI.getFrontendOpts().ASTDumpLookups);
 }
 
-ASTConsumer *ASTDeclListAction::CreateASTConsumer(CompilerInstance &CI,
-                                                  StringRef InFile) {
+std::unique_ptr<ASTConsumer>
+ASTDeclListAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
   return CreateASTDeclNodeLister();
 }
 
-ASTConsumer *ASTViewAction::CreateASTConsumer(CompilerInstance &CI,
-                                              StringRef InFile) {
+std::unique_ptr<ASTConsumer>
+ASTViewAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
   return CreateASTViewer();
 }
 
-ASTConsumer *DeclContextPrintAction::CreateASTConsumer(CompilerInstance &CI,
-                                                       StringRef InFile) {
+std::unique_ptr<ASTConsumer>
+DeclContextPrintAction::CreateASTConsumer(CompilerInstance &CI,
+                                          StringRef InFile) {
   return CreateDeclContextPrinter();
 }
 
-ASTConsumer *GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI,
-                                                  StringRef InFile) {
+std::unique_ptr<ASTConsumer>
+GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
   std::string Sysroot;
   std::string OutputFile;
   raw_ostream *OS = nullptr;
@@ -83,8 +85,8 @@ ASTConsumer *GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI,
 
   if (!CI.getFrontendOpts().RelocatablePCH)
     Sysroot.clear();
-  return new PCHGenerator(CI.getPreprocessor(), OutputFile, nullptr, Sysroot,
-                          OS);
+  return llvm::make_unique<PCHGenerator>(CI.getPreprocessor(), OutputFile,
+                                         nullptr, Sysroot, OS);
 }
 
 bool GeneratePCHAction::ComputeASTConsumerArguments(CompilerInstance &CI,
@@ -111,16 +113,17 @@ bool GeneratePCHAction::ComputeASTConsumerArguments(CompilerInstance &CI,
   return false;
 }
 
-ASTConsumer *GenerateModuleAction::CreateASTConsumer(CompilerInstance &CI,
-                                                     StringRef InFile) {
+std::unique_ptr<ASTConsumer>
+GenerateModuleAction::CreateASTConsumer(CompilerInstance &CI,
+                                        StringRef InFile) {
   std::string Sysroot;
   std::string OutputFile;
   raw_ostream *OS = nullptr;
   if (ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile, OS))
     return nullptr;
 
-  return new PCHGenerator(CI.getPreprocessor(), OutputFile, Module, 
-                          Sysroot, OS);
+  return llvm::make_unique<PCHGenerator>(CI.getPreprocessor(), OutputFile,
+                                         Module, Sysroot, OS);
 }
 
 static SmallVectorImpl<char> &
@@ -139,17 +142,9 @@ static std::error_code addHeaderInclude(StringRef HeaderName,
     Includes += "#import \"";
   else
     Includes += "#include \"";
-  // Use an absolute path for the include; there's no reason to think that
-  // a relative path will work (. might not be on our include path) or that
-  // it will find the same file.
-  if (llvm::sys::path::is_absolute(HeaderName)) {
-    Includes += HeaderName;
-  } else {
-    SmallString<256> Header = HeaderName;
-    if (std::error_code Err = llvm::sys::fs::make_absolute(Header))
-      return Err;
-    Includes += Header;
-  }
+
+  Includes += HeaderName;
+
   Includes += "\"\n";
   if (IsExternC && LangOpts.CPlusPlus)
     Includes += "}\n";
@@ -160,7 +155,16 @@ static std::error_code addHeaderInclude(const FileEntry *Header,
                                         SmallVectorImpl<char> &Includes,
                                         const LangOptions &LangOpts,
                                         bool IsExternC) {
-  return addHeaderInclude(Header->getName(), Includes, LangOpts, IsExternC);
+  // Use an absolute path if we don't have a filename as written in the module
+  // map file; this ensures that we will identify the right file independent of
+  // header search paths.
+  if (llvm::sys::path::is_absolute(Header->getName()))
+    return addHeaderInclude(Header->getName(), Includes, LangOpts, IsExternC);
+
+  SmallString<256> AbsName(Header->getName());
+  if (std::error_code Err = llvm::sys::fs::make_absolute(AbsName))
+    return Err;
+  return addHeaderInclude(AbsName, Includes, LangOpts, IsExternC);
 }
 
 /// \brief Collect the set of header includes needed to construct the given 
@@ -179,16 +183,20 @@ collectModuleHeaderIncludes(const LangOptions &LangOpts, FileManager &FileMgr,
     return std::error_code();
 
   // Add includes for each of these headers.
-  for (unsigned I = 0, N = Module->NormalHeaders.size(); I != N; ++I) {
-    const FileEntry *Header = Module->NormalHeaders[I];
-    Module->addTopHeader(Header);
-    if (std::error_code Err =
-            addHeaderInclude(Header, Includes, LangOpts, Module->IsExternC))
+  for (Module::Header &H : Module->Headers[Module::HK_Normal]) {
+    Module->addTopHeader(H.Entry);
+    // Use the path as specified in the module map file. We'll look for this
+    // file relative to the module build directory (the directory containing
+    // the module map file) so this will find the same file that we found
+    // while parsing the module map.
+    if (std::error_code Err = addHeaderInclude(H.NameAsWritten, Includes,
+                                               LangOpts, Module->IsExternC))
       return Err;
   }
   // Note that Module->PrivateHeaders will not be a TopHeader.
 
   if (const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader()) {
+    // FIXME: Track the name as written here.
     Module->addTopHeader(UmbrellaHeader);
     if (Module->Parent) {
       // Include the umbrella header for submodules.
@@ -210,25 +218,30 @@ collectModuleHeaderIncludes(const LangOptions &LangOpts, FileManager &FileMgr,
           .Cases(".h", ".H", ".hh", ".hpp", true)
           .Default(false))
         continue;
-      
+
+      const FileEntry *Header = FileMgr.getFile(Dir->path());
+      // FIXME: This shouldn't happen unless there is a file system race. Is
+      // that worth diagnosing?
+      if (!Header)
+        continue;
+
       // If this header is marked 'unavailable' in this module, don't include 
       // it.
-      if (const FileEntry *Header = FileMgr.getFile(Dir->path())) {
-        if (ModMap.isHeaderUnavailableInModule(Header, Module))
-          continue;
-        Module->addTopHeader(Header);
-      }
-      
+      if (ModMap.isHeaderUnavailableInModule(Header, Module))
+        continue;
+
       // Include this header as part of the umbrella directory.
-      if (std::error_code Err = addHeaderInclude(Dir->path(), Includes,
-                                                 LangOpts, Module->IsExternC))
+      // FIXME: Track the name as written through to here.
+      Module->addTopHeader(Header);
+      if (std::error_code Err =
+              addHeaderInclude(Header, Includes, LangOpts, Module->IsExternC))
         return Err;
     }
 
     if (EC)
       return EC;
   }
-  
+
   // Recurse into submodules.
   for (clang::Module::submodule_iterator Sub = Module->submodule_begin(),
                                       SubEnd = Module->submodule_end();
@@ -285,7 +298,7 @@ bool GenerateModuleAction::BeginSourceFileAction(CompilerInstance &CI,
 
   // Check whether we can build this module at all.
   clang::Module::Requirement Requirement;
-  clang::Module::HeaderDirective MissingHeader;
+  clang::Module::UnresolvedHeaderDirective MissingHeader;
   if (!Module->isAvailable(CI.getLangOpts(), CI.getTarget(), Requirement,
                            MissingHeader)) {
     if (MissingHeader.FileNameLoc.isValid()) {
@@ -301,10 +314,12 @@ bool GenerateModuleAction::BeginSourceFileAction(CompilerInstance &CI,
     return false;
   }
 
-  if (!ModuleMapForUniquing)
+  if (ModuleMapForUniquing && ModuleMapForUniquing != ModuleMap) {
+    Module->IsInferred = true;
+    HS.getModuleMap().setInferredModuleAllowedBy(Module, ModuleMapForUniquing);
+  } else {
     ModuleMapForUniquing = ModuleMap;
-  Module->ModuleMap = ModuleMapForUniquing;
-  assert(Module->ModuleMap && "missing module map file");
+  }
 
   FileManager &FileMgr = CI.getFileManager();
 
@@ -312,6 +327,7 @@ bool GenerateModuleAction::BeginSourceFileAction(CompilerInstance &CI,
   SmallString<256> HeaderContents;
   std::error_code Err = std::error_code();
   if (const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader())
+    // FIXME: Track the file name as written.
     Err = addHeaderInclude(UmbrellaHeader, HeaderContents, CI.getLangOpts(),
                            Module->IsExternC);
   if (!Err)
@@ -326,11 +342,15 @@ bool GenerateModuleAction::BeginSourceFileAction(CompilerInstance &CI,
     return false;
   }
 
-  llvm::MemoryBuffer *InputBuffer =
+  // Inform the preprocessor that includes from within the input buffer should
+  // be resolved relative to the build directory of the module map file.
+  CI.getPreprocessor().setMainFileDir(Module->Directory);
+
+  std::unique_ptr<llvm::MemoryBuffer> InputBuffer =
       llvm::MemoryBuffer::getMemBufferCopy(HeaderContents,
                                            Module::getModuleInputBufferName());
   // Ownership of InputBuffer will be transferred to the SourceManager.
-  setCurrentInput(FrontendInputFile(InputBuffer, getCurrentFileKind(),
+  setCurrentInput(FrontendInputFile(InputBuffer.release(), getCurrentFileKind(),
                                     Module->IsSystem));
   return true;
 }
@@ -363,19 +383,20 @@ bool GenerateModuleAction::ComputeASTConsumerArguments(CompilerInstance &CI,
   return false;
 }
 
-ASTConsumer *SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI,
-                                                 StringRef InFile) {
-  return new ASTConsumer();
+std::unique_ptr<ASTConsumer>
+SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
+  return llvm::make_unique<ASTConsumer>();
 }
 
-ASTConsumer *DumpModuleInfoAction::CreateASTConsumer(CompilerInstance &CI,
-                                                     StringRef InFile) {
-  return new ASTConsumer();
+std::unique_ptr<ASTConsumer>
+DumpModuleInfoAction::CreateASTConsumer(CompilerInstance &CI,
+                                        StringRef InFile) {
+  return llvm::make_unique<ASTConsumer>();
 }
 
-ASTConsumer *VerifyPCHAction::CreateASTConsumer(CompilerInstance &CI,
-                                                StringRef InFile) {
-  return new ASTConsumer();
+std::unique_ptr<ASTConsumer>
+VerifyPCHAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
+  return llvm::make_unique<ASTConsumer>();
 }
 
 void VerifyPCHAction::ExecuteAction() {
@@ -425,8 +446,8 @@ namespace {
       Out.indent(2) << "Module map file: " << ModuleMapPath << "\n";
     }
 
-    bool ReadLanguageOptions(const LangOptions &LangOpts,
-                             bool Complain) override {
+    bool ReadLanguageOptions(const LangOptions &LangOpts, bool Complain,
+                             bool AllowCompatibleDifferences) override {
       Out.indent(2) << "Language options:\n";
 #define LANGOPT(Name, Bits, Default, Description) \
       DUMP_BOOLEAN(LangOpts.Name, Description);
@@ -528,9 +549,9 @@ void DumpModuleInfoAction::ExecuteAction() {
   std::unique_ptr<llvm::raw_fd_ostream> OutFile;
   StringRef OutputFileName = getCompilerInstance().getFrontendOpts().OutputFile;
   if (!OutputFileName.empty() && OutputFileName != "-") {
-    std::string ErrorInfo;
-    OutFile.reset(new llvm::raw_fd_ostream(OutputFileName.str().c_str(),
-                                           ErrorInfo, llvm::sys::fs::F_Text));
+    std::error_code EC;
+    OutFile.reset(new llvm::raw_fd_ostream(OutputFileName.str(), EC,
+                                           llvm::sys::fs::F_Text));
   }
   llvm::raw_ostream &Out = OutFile.get()? *OutFile.get() : llvm::outs();
 
@@ -675,13 +696,12 @@ void PrintPreambleAction::ExecuteAction() {
     // We can't do anything with these.
     return;
   }
-  
+
   CompilerInstance &CI = getCompilerInstance();
-  llvm::MemoryBuffer *Buffer
-      = CI.getFileManager().getBufferForFile(getCurrentFile());
+  auto Buffer = CI.getFileManager().getBufferForFile(getCurrentFile());
   if (Buffer) {
-    unsigned Preamble = Lexer::ComputePreamble(Buffer, CI.getLangOpts()).first;
-    llvm::outs().write(Buffer->getBufferStart(), Preamble);
-    delete Buffer;
+    unsigned Preamble =
+        Lexer::ComputePreamble((*Buffer)->getBuffer(), CI.getLangOpts()).first;
+    llvm::outs().write((*Buffer)->getBufferStart(), Preamble);
   }
 }
diff --git a/contrib/llvm/tools/clang/lib/Frontend/HeaderIncludeGen.cpp b/contrib/llvm/tools/clang/lib/Frontend/HeaderIncludeGen.cpp
index a2f5896..2701194 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/HeaderIncludeGen.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/HeaderIncludeGen.cpp
@@ -54,13 +54,12 @@ void clang::AttachHeaderIncludeGen(Preprocessor &PP, bool ShowAllHeaders,
 
   // Open the output file, if used.
   if (!OutputPath.empty()) {
-    std::string Error;
+    std::error_code EC;
     llvm::raw_fd_ostream *OS = new llvm::raw_fd_ostream(
-        OutputPath.str().c_str(), Error,
-        llvm::sys::fs::F_Append | llvm::sys::fs::F_Text);
-    if (!Error.empty()) {
-      PP.getDiagnostics().Report(
-        clang::diag::warn_fe_cc_print_header_failure) << Error;
+        OutputPath.str(), EC, llvm::sys::fs::F_Append | llvm::sys::fs::F_Text);
+    if (EC) {
+      PP.getDiagnostics().Report(clang::diag::warn_fe_cc_print_header_failure)
+          << EC.message();
       delete OS;
     } else {
       OS->SetUnbuffered();
@@ -70,9 +69,12 @@ void clang::AttachHeaderIncludeGen(Preprocessor &PP, bool ShowAllHeaders,
     }
   }
 
-  PP.addPPCallbacks(new HeaderIncludesCallback(&PP, ShowAllHeaders,
-                                               OutputFile, OwnsOutputFile,
-                                               ShowDepth, MSStyle));
+  PP.addPPCallbacks(llvm::make_unique<HeaderIncludesCallback>(&PP,
+                                                              ShowAllHeaders,
+                                                              OutputFile,
+                                                              OwnsOutputFile,
+                                                              ShowDepth,
+                                                              MSStyle));
 }
 
 void HeaderIncludesCallback::FileChanged(SourceLocation Loc,
diff --git a/contrib/llvm/tools/clang/lib/Frontend/InitHeaderSearch.cpp b/contrib/llvm/tools/clang/lib/Frontend/InitHeaderSearch.cpp
index 6a47d04..a518a0a 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/InitHeaderSearch.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/InitHeaderSearch.cpp
@@ -14,7 +14,6 @@
 #include "clang/Frontend/Utils.h"
 #include "clang/Basic/FileManager.h"
 #include "clang/Basic/LangOptions.h"
-#include "clang/Basic/Version.h"
 #include "clang/Config/config.h" // C_INCLUDE_DIRS
 #include "clang/Lex/HeaderSearch.h"
 #include "clang/Lex/HeaderSearchOptions.h"
@@ -337,9 +336,6 @@ void InitHeaderSearch::AddDefaultCIncludePaths(const llvm::Triple &triple,
       break;
     }
     break;
-  case llvm::Triple::FreeBSD:
-    AddPath("/usr/include/clang/" CLANG_VERSION_STRING, System, false);
-    break;
   default:
     break;
   }
@@ -384,7 +380,6 @@ AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOp
       break;
 
     case llvm::Triple::aarch64:
-    case llvm::Triple::arm64:
       AddGnuCPlusPlusIncludePaths("/usr/include/c++/4.2.1",
                                   "arm64-apple-darwin10", "", "", triple);
       break;
@@ -395,7 +390,7 @@ AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOp
   switch (os) {
   case llvm::Triple::Linux:
     llvm_unreachable("Include management is handled in the driver.");
-
+    break;
   case llvm::Triple::Win32:
     switch (triple.getEnvironment()) {
     default: llvm_unreachable("Include management is handled in the driver.");
@@ -449,11 +444,6 @@ AddDefaultCPlusPlusIncludePaths(const llvm::Triple &triple, const HeaderSearchOp
   case llvm::Triple::Solaris:
     AddGnuCPlusPlusIncludePaths("/usr/gcc/4.5/include/c++/4.5.2/",
                                 "i386-pc-solaris2.11", "", "", triple);
-    // Solaris - Fall though..
-  case llvm::Triple::AuroraUX:
-    // AuroraUX
-    AddGnuCPlusPlusIncludePaths("/opt/gcc4/include/c++/4.2.4",
-                                "i386-pc-solaris2.11", "", "", triple);
     break;
   default:
     break;
@@ -477,7 +467,7 @@ void InitHeaderSearch::AddDefaultIncludePaths(const LangOptions &Lang,
   case llvm::Triple::Win32:
     if (triple.getEnvironment() == llvm::Triple::MSVC ||
         triple.getEnvironment() == llvm::Triple::Itanium ||
-        triple.getObjectFormat() == llvm::Triple::MachO)
+        triple.isOSBinFormatMachO())
       return;
     break;
   }
@@ -539,16 +529,16 @@ static unsigned RemoveDuplicates(std::vector<DirectoryLookup> &SearchList,
 
     if (CurEntry.isNormalDir()) {
       // If this isn't the first time we've seen this dir, remove it.
-      if (SeenDirs.insert(CurEntry.getDir()))
+      if (SeenDirs.insert(CurEntry.getDir()).second)
         continue;
     } else if (CurEntry.isFramework()) {
       // If this isn't the first time we've seen this framework dir, remove it.
-      if (SeenFrameworkDirs.insert(CurEntry.getFrameworkDir()))
+      if (SeenFrameworkDirs.insert(CurEntry.getFrameworkDir()).second)
         continue;
     } else {
       assert(CurEntry.isHeaderMap() && "Not a headermap or normal dir?");
       // If this isn't the first time we've seen this headermap, remove it.
-      if (SeenHeaderMaps.insert(CurEntry.getHeaderMap()))
+      if (SeenHeaderMaps.insert(CurEntry.getHeaderMap()).second)
         continue;
     }
 
diff --git a/contrib/llvm/tools/clang/lib/Frontend/InitPreprocessor.cpp b/contrib/llvm/tools/clang/lib/Frontend/InitPreprocessor.cpp
index 7a9d09a..f4241a9 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/InitPreprocessor.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/InitPreprocessor.cpp
@@ -65,17 +65,14 @@ static void DefineBuiltinMacro(MacroBuilder &Builder, StringRef Macro,
 
 /// AddImplicitInclude - Add an implicit \#include of the specified file to the
 /// predefines buffer.
-static void AddImplicitInclude(MacroBuilder &Builder, StringRef File,
-                               FileManager &FileMgr) {
-  Builder.append(Twine("#include \"") +
-                 HeaderSearch::NormalizeDashIncludePath(File, FileMgr) + "\"");
+/// As these includes are generated by -include arguments the header search
+/// logic is going to search relatively to the current working directory.
+static void AddImplicitInclude(MacroBuilder &Builder, StringRef File) {
+  Builder.append(Twine("#include \"") + File + "\"");
 }
 
-static void AddImplicitIncludeMacros(MacroBuilder &Builder,
-                                     StringRef File,
-                                     FileManager &FileMgr) {
-  Builder.append(Twine("#__include_macros \"") +
-                 HeaderSearch::NormalizeDashIncludePath(File, FileMgr) + "\"");
+static void AddImplicitIncludeMacros(MacroBuilder &Builder, StringRef File) {
+  Builder.append(Twine("#__include_macros \"") + File + "\"");
   // Marker token to stop the __include_macros fetch loop.
   Builder.append("##"); // ##?
 }
@@ -94,7 +91,7 @@ static void AddImplicitIncludePTH(MacroBuilder &Builder, Preprocessor &PP,
     return;
   }
 
-  AddImplicitInclude(Builder, OriginalFile, PP.getFileManager());
+  AddImplicitInclude(Builder, OriginalFile);
 }
 
 /// \brief Add an implicit \#include using the original file used to generate
@@ -107,7 +104,7 @@ static void AddImplicitIncludePCH(MacroBuilder &Builder, Preprocessor &PP,
   if (OriginalFile.empty())
     return;
 
-  AddImplicitInclude(Builder, OriginalFile, PP.getFileManager());
+  AddImplicitInclude(Builder, OriginalFile);
 }
 
 /// PickFP - This is used to pick a value based on the FP semantics of the
@@ -378,7 +375,7 @@ static void InitializeStandardPredefinedMacros(const TargetInfo &TI,
     // C++1y [cpp.predefined]p1:
     //   The name __cplusplus is defined to the value 201402L when compiling a
     //   C++ translation unit.
-    else if (LangOpts.CPlusPlus1y)
+    else if (LangOpts.CPlusPlus14)
       Builder.defineMacro("__cplusplus", "201402L");
     // C++11 [cpp.predefined]p1:
     //   The name __cplusplus is defined to the value 201103L when compiling a
@@ -412,6 +409,12 @@ static void InitializeStandardPredefinedMacros(const TargetInfo &TI,
 /// ISO/IEC JTC1/SC22/WG21 (C++) SD-6: "SG10 Feature Test Recommendations".
 static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts,
                                                  MacroBuilder &Builder) {
+  // C++98 features.
+  if (LangOpts.RTTI)
+    Builder.defineMacro("__cpp_rtti", "199711");
+  if (LangOpts.CXXExceptions)
+    Builder.defineMacro("__cpp_exceptions", "199711");
+
   // C++11 features.
   if (LangOpts.CPlusPlus11) {
     Builder.defineMacro("__cpp_unicode_characters", "200704");
@@ -420,17 +423,25 @@ static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts,
     Builder.defineMacro("__cpp_user_defined_literals", "200809");
     Builder.defineMacro("__cpp_lambdas", "200907");
     Builder.defineMacro("__cpp_constexpr",
-                        LangOpts.CPlusPlus1y ? "201304" : "200704");
+                        LangOpts.CPlusPlus14 ? "201304" : "200704");
+    Builder.defineMacro("__cpp_range_based_for", "200907");
     Builder.defineMacro("__cpp_static_assert", "200410");
     Builder.defineMacro("__cpp_decltype", "200707");
     Builder.defineMacro("__cpp_attributes", "200809");
     Builder.defineMacro("__cpp_rvalue_references", "200610");
     Builder.defineMacro("__cpp_variadic_templates", "200704");
+    Builder.defineMacro("__cpp_initializer_lists", "200806");
+    Builder.defineMacro("__cpp_delegating_constructors", "200604");
+    Builder.defineMacro("__cpp_nsdmi", "200809");
+    Builder.defineMacro("__cpp_inheriting_constructors", "200802");
+    Builder.defineMacro("__cpp_ref_qualifiers", "200710");
+    Builder.defineMacro("__cpp_alias_templates", "200704");
   }
 
   // C++14 features.
-  if (LangOpts.CPlusPlus1y) {
+  if (LangOpts.CPlusPlus14) {
     Builder.defineMacro("__cpp_binary_literals", "201304");
+    Builder.defineMacro("__cpp_digit_separators", "201309");
     Builder.defineMacro("__cpp_init_captures", "201304");
     Builder.defineMacro("__cpp_generic_lambdas", "201304");
     Builder.defineMacro("__cpp_decltype_auto", "201304");
@@ -438,6 +449,8 @@ static void InitializeCPlusPlusFeatureTestMacros(const LangOptions &LangOpts,
     Builder.defineMacro("__cpp_aggregate_nsdmi", "201304");
     Builder.defineMacro("__cpp_variable_templates", "201304");
   }
+  if (LangOpts.SizedDeallocation)
+    Builder.defineMacro("__cpp_sized_deallocation", "201309");
 }
 
 static void InitializePredefinedMacros(const TargetInfo &TI,
@@ -530,6 +543,8 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
     Builder.defineMacro("IBOutletCollection(ClassName)",
                         "__attribute__((iboutletcollection(ClassName)))");
     Builder.defineMacro("IBAction", "void)__attribute__((ibaction)");
+    Builder.defineMacro("IBInspectable", "");
+    Builder.defineMacro("IB_DESIGNABLE", "");
   }
 
   if (LangOpts.CPlusPlus)
@@ -551,7 +566,7 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
     Builder.defineMacro("__BLOCKS__");
   }
 
-  if (!LangOpts.MSVCCompat && LangOpts.CXXExceptions)
+  if (!LangOpts.MSVCCompat && LangOpts.Exceptions)
     Builder.defineMacro("__EXCEPTIONS");
   if (!LangOpts.MSVCCompat && LangOpts.RTTI)
     Builder.defineMacro("__GXX_RTTI");
@@ -626,12 +641,10 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
   DefineTypeSize("__INTMAX_MAX__", TI.getIntMaxType(), TI, Builder);
   DefineTypeSize("__SIZE_MAX__", TI.getSizeType(), TI, Builder);
 
-  if (!LangOpts.MSVCCompat) {
-    DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder);
-    DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder);
-    DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder);
-    DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder);
-  }
+  DefineTypeSize("__UINTMAX_MAX__", TI.getUIntMaxType(), TI, Builder);
+  DefineTypeSize("__PTRDIFF_MAX__", TI.getPtrDiffType(0), TI, Builder);
+  DefineTypeSize("__INTPTR_MAX__", TI.getIntPtrType(), TI, Builder);
+  DefineTypeSize("__UINTPTR_MAX__", TI.getUIntPtrType(), TI, Builder);
 
   DefineTypeSizeof("__SIZEOF_DOUBLE__", TI.getDoubleWidth(), TI, Builder);
   DefineTypeSizeof("__SIZEOF_FLOAT__", TI.getFloatWidth(), TI, Builder);
@@ -649,7 +662,12 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
                    TI.getTypeWidth(TI.getWCharType()), TI, Builder);
   DefineTypeSizeof("__SIZEOF_WINT_T__",
                    TI.getTypeWidth(TI.getWIntType()), TI, Builder);
-  if (TI.hasInt128Type())
+  // This is a temporary workaround while MIPS64 has not yet fully supported
+  // 128-bit integers. But declaration of int128 type is necessary even though
+  // __SIZEOF_INT128__ is undefined because c++ standard header files like
+  // limits throw error message if __int128 is not available.
+  if (TI.hasInt128Type() && !(TI.getTriple().getArch() == llvm::Triple::mips64el
+                   || TI.getTriple().getArch() == llvm::Triple::mips64))
     DefineTypeSizeof("__SIZEOF_INT128__", 128, TI, Builder);
 
   DefineType("__INTMAX_TYPE__", TI.getIntMaxType(), Builder);
@@ -679,12 +697,10 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
   DefineType("__CHAR16_TYPE__", TI.getChar16Type(), Builder);
   DefineType("__CHAR32_TYPE__", TI.getChar32Type(), Builder);
 
-  if (!LangOpts.MSVCCompat) {
-    DefineTypeWidth("__UINTMAX_WIDTH__",  TI.getUIntMaxType(), TI, Builder);
-    DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder);
-    DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder);
-    DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder);
-  }
+  DefineTypeWidth("__UINTMAX_WIDTH__",  TI.getUIntMaxType(), TI, Builder);
+  DefineType("__UINTPTR_TYPE__", TI.getUIntPtrType(), Builder);
+  DefineFmt("__UINTPTR", TI.getUIntPtrType(), TI, Builder);
+  DefineTypeWidth("__UINTPTR_WIDTH__", TI.getUIntPtrType(), TI, Builder);
 
   DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F");
   DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), "");
@@ -718,54 +734,52 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
   if (TI.getLongLongWidth() > TI.getLongWidth())
     DefineExactWidthIntType(TargetInfo::SignedLongLong, TI, Builder);
 
-  if (!LangOpts.MSVCCompat) {
-    DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder);
-    DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder);
-    DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder);
-
-    if (TI.getShortWidth() > TI.getCharWidth()) {
-      DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder);
-      DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder);
-      DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder);
-    }
+  DefineExactWidthIntType(TargetInfo::UnsignedChar, TI, Builder);
+  DefineExactWidthIntTypeSize(TargetInfo::UnsignedChar, TI, Builder);
+  DefineExactWidthIntTypeSize(TargetInfo::SignedChar, TI, Builder);
 
-    if (TI.getIntWidth() > TI.getShortWidth()) {
-      DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder);
-      DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder);
-      DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder);
-    }
+  if (TI.getShortWidth() > TI.getCharWidth()) {
+    DefineExactWidthIntType(TargetInfo::UnsignedShort, TI, Builder);
+    DefineExactWidthIntTypeSize(TargetInfo::UnsignedShort, TI, Builder);
+    DefineExactWidthIntTypeSize(TargetInfo::SignedShort, TI, Builder);
+  }
 
-    if (TI.getLongWidth() > TI.getIntWidth()) {
-      DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder);
-      DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder);
-      DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder);
-    }
+  if (TI.getIntWidth() > TI.getShortWidth()) {
+    DefineExactWidthIntType(TargetInfo::UnsignedInt, TI, Builder);
+    DefineExactWidthIntTypeSize(TargetInfo::UnsignedInt, TI, Builder);
+    DefineExactWidthIntTypeSize(TargetInfo::SignedInt, TI, Builder);
+  }
 
-    if (TI.getLongLongWidth() > TI.getLongWidth()) {
-      DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder);
-      DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder);
-      DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder);
-    }
+  if (TI.getLongWidth() > TI.getIntWidth()) {
+    DefineExactWidthIntType(TargetInfo::UnsignedLong, TI, Builder);
+    DefineExactWidthIntTypeSize(TargetInfo::UnsignedLong, TI, Builder);
+    DefineExactWidthIntTypeSize(TargetInfo::SignedLong, TI, Builder);
+  }
 
-    DefineLeastWidthIntType(8, true, TI, Builder);
-    DefineLeastWidthIntType(8, false, TI, Builder);
-    DefineLeastWidthIntType(16, true, TI, Builder);
-    DefineLeastWidthIntType(16, false, TI, Builder);
-    DefineLeastWidthIntType(32, true, TI, Builder);
-    DefineLeastWidthIntType(32, false, TI, Builder);
-    DefineLeastWidthIntType(64, true, TI, Builder);
-    DefineLeastWidthIntType(64, false, TI, Builder);
-
-    DefineFastIntType(8, true, TI, Builder);
-    DefineFastIntType(8, false, TI, Builder);
-    DefineFastIntType(16, true, TI, Builder);
-    DefineFastIntType(16, false, TI, Builder);
-    DefineFastIntType(32, true, TI, Builder);
-    DefineFastIntType(32, false, TI, Builder);
-    DefineFastIntType(64, true, TI, Builder);
-    DefineFastIntType(64, false, TI, Builder);
+  if (TI.getLongLongWidth() > TI.getLongWidth()) {
+    DefineExactWidthIntType(TargetInfo::UnsignedLongLong, TI, Builder);
+    DefineExactWidthIntTypeSize(TargetInfo::UnsignedLongLong, TI, Builder);
+    DefineExactWidthIntTypeSize(TargetInfo::SignedLongLong, TI, Builder);
   }
 
+  DefineLeastWidthIntType(8, true, TI, Builder);
+  DefineLeastWidthIntType(8, false, TI, Builder);
+  DefineLeastWidthIntType(16, true, TI, Builder);
+  DefineLeastWidthIntType(16, false, TI, Builder);
+  DefineLeastWidthIntType(32, true, TI, Builder);
+  DefineLeastWidthIntType(32, false, TI, Builder);
+  DefineLeastWidthIntType(64, true, TI, Builder);
+  DefineLeastWidthIntType(64, false, TI, Builder);
+
+  DefineFastIntType(8, true, TI, Builder);
+  DefineFastIntType(8, false, TI, Builder);
+  DefineFastIntType(16, true, TI, Builder);
+  DefineFastIntType(16, false, TI, Builder);
+  DefineFastIntType(32, true, TI, Builder);
+  DefineFastIntType(32, false, TI, Builder);
+  DefineFastIntType(64, true, TI, Builder);
+  DefineFastIntType(64, false, TI, Builder);
+
   if (const char *Prefix = TI.getUserLabelPrefix())
     Builder.defineMacro("__USER_LABEL_PREFIX__", Prefix);
 
@@ -861,6 +875,13 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
     Builder.defineMacro("_OPENMP", "201307");
   }
 
+  // CUDA device path compilaton
+  if (LangOpts.CUDAIsDevice) {
+    // The CUDA_ARCH value is set for the GPU target specified in the NVPTX
+    // backend's target defines.
+    Builder.defineMacro("__CUDA_ARCH__");
+  }
+
   // Get other target #defines.
   TI.getTargetDefines(LangOpts, Builder);
 }
@@ -925,8 +946,7 @@ void clang::InitializePreprocessor(Preprocessor &PP,
   // If -imacros are specified, include them now.  These are processed before
   // any -include directives.
   for (unsigned i = 0, e = InitOpts.MacroIncludes.size(); i != e; ++i)
-    AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i],
-                             PP.getFileManager());
+    AddImplicitIncludeMacros(Builder, InitOpts.MacroIncludes[i]);
 
   // Process -include-pch/-include-pth directives.
   if (!InitOpts.ImplicitPCHInclude.empty())
@@ -937,7 +957,7 @@ void clang::InitializePreprocessor(Preprocessor &PP,
   // Process -include directives.
   for (unsigned i = 0, e = InitOpts.Includes.size(); i != e; ++i) {
     const std::string &Path = InitOpts.Includes[i];
-    AddImplicitInclude(Builder, Path, PP.getFileManager());
+    AddImplicitInclude(Builder, Path);
   }
 
   // Exit the command line and go back to <built-in> (2 is LC_LEAVE).
diff --git a/contrib/llvm/tools/clang/lib/Frontend/LogDiagnosticPrinter.cpp b/contrib/llvm/tools/clang/lib/Frontend/LogDiagnosticPrinter.cpp
index 19539e0..c6a18e0 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/LogDiagnosticPrinter.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/LogDiagnosticPrinter.cpp
@@ -18,17 +18,11 @@
 using namespace clang;
 using namespace markup;
 
-LogDiagnosticPrinter::LogDiagnosticPrinter(raw_ostream &os,
-                                           DiagnosticOptions *diags,
-                                           bool _OwnsOutputStream)
-  : OS(os), LangOpts(nullptr), DiagOpts(diags),
-    OwnsOutputStream(_OwnsOutputStream) {
-}
-
-LogDiagnosticPrinter::~LogDiagnosticPrinter() {
-  if (OwnsOutputStream)
-    delete &OS;
-}
+LogDiagnosticPrinter::LogDiagnosticPrinter(
+    raw_ostream &os, DiagnosticOptions *diags,
+    std::unique_ptr<raw_ostream> StreamOwner)
+    : OS(os), StreamOwner(std::move(StreamOwner)), LangOpts(nullptr),
+      DiagOpts(diags) {}
 
 static StringRef getLevelName(DiagnosticsEngine::Level Level) {
   switch (Level) {
@@ -69,6 +63,14 @@ LogDiagnosticPrinter::EmitDiagEntry(llvm::raw_ostream &OS,
        << "      ";
     EmitString(OS, DE.Message) << '\n';
   }
+  OS << "      <key>ID</key>\n"
+     << "      ";
+  EmitInteger(OS, DE.DiagnosticID) << '\n';
+  if (!DE.WarningOption.empty()) {
+    OS << "      <key>WarningOption</key>\n"
+       << "      ";
+    EmitString(OS, DE.WarningOption) << '\n';
+  }
   OS << "    </dict>\n";
 }
 
@@ -128,6 +130,8 @@ void LogDiagnosticPrinter::HandleDiagnostic(DiagnosticsEngine::Level Level,
   DE.DiagnosticID = Info.getID();
   DE.DiagnosticLevel = Level;
 
+  DE.WarningOption = DiagnosticIDs::getWarningOptionForDiag(DE.DiagnosticID);
+
   // Format the message.
   SmallString<100> MessageStr;
   Info.FormatDiagnostic(MessageStr);
diff --git a/contrib/llvm/tools/clang/lib/Frontend/ModuleDependencyCollector.cpp b/contrib/llvm/tools/clang/lib/Frontend/ModuleDependencyCollector.cpp
index d30f921..62865e9 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/ModuleDependencyCollector.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/ModuleDependencyCollector.cpp
@@ -13,8 +13,8 @@
 
 #include "clang/Frontend/Utils.h"
 #include "clang/Serialization/ASTReader.h"
-#include "llvm/ADT/iterator_range.h"
 #include "llvm/ADT/StringSet.h"
+#include "llvm/ADT/iterator_range.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/Path.h"
 #include "llvm/Support/raw_ostream.h"
@@ -38,7 +38,7 @@ public:
 }
 
 void ModuleDependencyCollector::attachToASTReader(ASTReader &R) {
-  R.addListener(new ModuleDependencyListener(*this));
+  R.addListener(llvm::make_unique<ModuleDependencyListener>(*this));
 }
 
 void ModuleDependencyCollector::writeFileMap() {
@@ -48,49 +48,26 @@ void ModuleDependencyCollector::writeFileMap() {
   SmallString<256> Dest = getDest();
   llvm::sys::path::append(Dest, "vfs.yaml");
 
-  std::string ErrorInfo;
-  llvm::raw_fd_ostream OS(Dest.c_str(), ErrorInfo, llvm::sys::fs::F_Text);
-  if (!ErrorInfo.empty()) {
+  std::error_code EC;
+  llvm::raw_fd_ostream OS(Dest, EC, llvm::sys::fs::F_Text);
+  if (EC) {
     setHasErrors();
     return;
   }
   VFSWriter.write(OS);
 }
 
-/// Remove traversal (ie, . or ..) from the given absolute path.
-static void removePathTraversal(SmallVectorImpl<char> &Path) {
-  using namespace llvm::sys;
-  SmallVector<StringRef, 16> ComponentStack;
-  StringRef P(Path.data(), Path.size());
-
-  // Skip the root path, then look for traversal in the components.
-  StringRef Rel = path::relative_path(P);
-  for (StringRef C : llvm::make_range(path::begin(Rel), path::end(Rel))) {
-    if (C == ".")
-      continue;
-    if (C == "..") {
-      assert(ComponentStack.size() && "Path traverses out of parent");
-      ComponentStack.pop_back();
-    } else
-      ComponentStack.push_back(C);
-  }
-
-  // The stack is now the path without any directory traversal.
-  SmallString<256> Buffer = path::root_path(P);
-  for (StringRef C : ComponentStack)
-    path::append(Buffer, C);
-
-  // Put the result in Path.
-  Path.swap(Buffer);
-}
-
 std::error_code ModuleDependencyListener::copyToRoot(StringRef Src) {
   using namespace llvm::sys;
 
   // We need an absolute path to append to the root.
   SmallString<256> AbsoluteSrc = Src;
   fs::make_absolute(AbsoluteSrc);
-  removePathTraversal(AbsoluteSrc);
+  // Canonicalize to a native path to avoid mixed separator styles.
+  path::native(AbsoluteSrc);
+  // TODO: We probably need to handle .. as well as . in order to have valid
+  // input to the YAMLVFSWriter.
+  FileManager::removeDotPaths(AbsoluteSrc);
 
   // Build the destination path.
   SmallString<256> Dest = Collector.getDest();
diff --git a/contrib/llvm/tools/clang/lib/Frontend/MultiplexConsumer.cpp b/contrib/llvm/tools/clang/lib/Frontend/MultiplexConsumer.cpp
index 0e933a3..0198828 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/MultiplexConsumer.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/MultiplexConsumer.cpp
@@ -107,6 +107,7 @@ public:
                                     const ObjCPropertyDecl *OrigProp,
                                     const ObjCCategoryDecl *ClassExt) override;
   void DeclarationMarkedUsed(const Decl *D) override;
+  void DeclarationMarkedOpenMPThreadPrivate(const Decl *D) override;
 
 private:
   std::vector<ASTMutationListener*> Listeners;
@@ -180,121 +181,121 @@ void MultiplexASTMutationListener::DeclarationMarkedUsed(const Decl *D) {
   for (size_t i = 0, e = Listeners.size(); i != e; ++i)
     Listeners[i]->DeclarationMarkedUsed(D);
 }
+void MultiplexASTMutationListener::DeclarationMarkedOpenMPThreadPrivate(
+    const Decl *D) {
+  for (size_t i = 0, e = Listeners.size(); i != e; ++i)
+    Listeners[i]->DeclarationMarkedOpenMPThreadPrivate(D);
+}
 
 }  // end namespace clang
 
-MultiplexConsumer::MultiplexConsumer(ArrayRef<ASTConsumer *> C)
-    : Consumers(C.begin(), C.end()), MutationListener(),
-      DeserializationListener() {
+MultiplexConsumer::MultiplexConsumer(
+    std::vector<std::unique_ptr<ASTConsumer>> C)
+    : Consumers(std::move(C)), MutationListener(), DeserializationListener() {
   // Collect the mutation listeners and deserialization listeners of all
   // children, and create a multiplex listener each if so.
   std::vector<ASTMutationListener*> mutationListeners;
   std::vector<ASTDeserializationListener*> serializationListeners;
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i) {
-    ASTMutationListener* mutationListener =
-        Consumers[i]->GetASTMutationListener();
-    if (mutationListener)
+  for (auto &Consumer : Consumers) {
+    if (auto *mutationListener = Consumer->GetASTMutationListener())
       mutationListeners.push_back(mutationListener);
-    ASTDeserializationListener* serializationListener =
-        Consumers[i]->GetASTDeserializationListener();
-    if (serializationListener)
+    if (auto *serializationListener = Consumer->GetASTDeserializationListener())
       serializationListeners.push_back(serializationListener);
   }
-  if (mutationListeners.size()) {
-    MutationListener.reset(new MultiplexASTMutationListener(mutationListeners));
+  if (!mutationListeners.empty()) {
+    MutationListener =
+        llvm::make_unique<MultiplexASTMutationListener>(mutationListeners);
   }
-  if (serializationListeners.size()) {
-    DeserializationListener.reset(
-        new MultiplexASTDeserializationListener(serializationListeners));
+  if (!serializationListeners.empty()) {
+    DeserializationListener =
+        llvm::make_unique<MultiplexASTDeserializationListener>(
+            serializationListeners);
   }
 }
 
-MultiplexConsumer::~MultiplexConsumer() {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    delete Consumers[i];
-}
+MultiplexConsumer::~MultiplexConsumer() {}
 
 void MultiplexConsumer::Initialize(ASTContext &Context) {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Consumers[i]->Initialize(Context);
+  for (auto &Consumer : Consumers)
+    Consumer->Initialize(Context);
 }
 
 bool MultiplexConsumer::HandleTopLevelDecl(DeclGroupRef D) {
   bool Continue = true;
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Continue = Continue && Consumers[i]->HandleTopLevelDecl(D);
+  for (auto &Consumer : Consumers)
+    Continue = Continue && Consumer->HandleTopLevelDecl(D);
   return Continue;
 }
 
 void MultiplexConsumer::HandleInlineMethodDefinition(CXXMethodDecl *D) {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Consumers[i]->HandleInlineMethodDefinition(D);
+  for (auto &Consumer : Consumers)
+    Consumer->HandleInlineMethodDefinition(D);
 }
 
-void  MultiplexConsumer::HandleCXXStaticMemberVarInstantiation(VarDecl *VD) {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Consumers[i]->HandleCXXStaticMemberVarInstantiation(VD);
+void MultiplexConsumer::HandleCXXStaticMemberVarInstantiation(VarDecl *VD) {
+  for (auto &Consumer : Consumers)
+    Consumer->HandleCXXStaticMemberVarInstantiation(VD);
 }
 
 void MultiplexConsumer::HandleInterestingDecl(DeclGroupRef D) {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Consumers[i]->HandleInterestingDecl(D);
+  for (auto &Consumer : Consumers)
+    Consumer->HandleInterestingDecl(D);
 }
 
 void MultiplexConsumer::HandleTranslationUnit(ASTContext &Ctx) {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Consumers[i]->HandleTranslationUnit(Ctx);
+  for (auto &Consumer : Consumers)
+    Consumer->HandleTranslationUnit(Ctx);
 }
 
 void MultiplexConsumer::HandleTagDeclDefinition(TagDecl *D) {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Consumers[i]->HandleTagDeclDefinition(D);
+  for (auto &Consumer : Consumers)
+    Consumer->HandleTagDeclDefinition(D);
 }
 
 void MultiplexConsumer::HandleTagDeclRequiredDefinition(const TagDecl *D) {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Consumers[i]->HandleTagDeclRequiredDefinition(D);
+  for (auto &Consumer : Consumers)
+    Consumer->HandleTagDeclRequiredDefinition(D);
 }
 
 void MultiplexConsumer::HandleCXXImplicitFunctionInstantiation(FunctionDecl *D){
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Consumers[i]->HandleCXXImplicitFunctionInstantiation(D);
+  for (auto &Consumer : Consumers)
+    Consumer->HandleCXXImplicitFunctionInstantiation(D);
 }
 
 void MultiplexConsumer::HandleTopLevelDeclInObjCContainer(DeclGroupRef D) {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Consumers[i]->HandleTopLevelDeclInObjCContainer(D);
+  for (auto &Consumer : Consumers)
+    Consumer->HandleTopLevelDeclInObjCContainer(D);
 }
 
 void MultiplexConsumer::HandleImplicitImportDecl(ImportDecl *D) {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Consumers[i]->HandleImplicitImportDecl(D);
+  for (auto &Consumer : Consumers)
+    Consumer->HandleImplicitImportDecl(D);
 }
 
 void MultiplexConsumer::HandleLinkerOptionPragma(llvm::StringRef Opts) {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Consumers[i]->HandleLinkerOptionPragma(Opts);
+  for (auto &Consumer : Consumers)
+    Consumer->HandleLinkerOptionPragma(Opts);
 }
 
 void MultiplexConsumer::HandleDetectMismatch(llvm::StringRef Name, llvm::StringRef Value) {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Consumers[i]->HandleDetectMismatch(Name, Value);
+  for (auto &Consumer : Consumers)
+    Consumer->HandleDetectMismatch(Name, Value);
 }
 
 void MultiplexConsumer::HandleDependentLibrary(llvm::StringRef Lib) {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Consumers[i]->HandleDependentLibrary(Lib);
+  for (auto &Consumer : Consumers)
+    Consumer->HandleDependentLibrary(Lib);
 }
 
 void MultiplexConsumer::CompleteTentativeDefinition(VarDecl *D) {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Consumers[i]->CompleteTentativeDefinition(D);
+  for (auto &Consumer : Consumers)
+    Consumer->CompleteTentativeDefinition(D);
 }
 
 void MultiplexConsumer::HandleVTable(
     CXXRecordDecl *RD, bool DefinitionRequired) {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Consumers[i]->HandleVTable(RD, DefinitionRequired);
+  for (auto &Consumer : Consumers)
+    Consumer->HandleVTable(RD, DefinitionRequired);
 }
 
 ASTMutationListener *MultiplexConsumer::GetASTMutationListener() {
@@ -306,18 +307,18 @@ ASTDeserializationListener *MultiplexConsumer::GetASTDeserializationListener() {
 }
 
 void MultiplexConsumer::PrintStats() {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    Consumers[i]->PrintStats();
+  for (auto &Consumer : Consumers)
+    Consumer->PrintStats();
 }
 
 void MultiplexConsumer::InitializeSema(Sema &S) {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    if (SemaConsumer *SC = dyn_cast<SemaConsumer>(Consumers[i]))
+  for (auto &Consumer : Consumers)
+    if (SemaConsumer *SC = dyn_cast<SemaConsumer>(Consumer.get()))
       SC->InitializeSema(S);
 }
 
 void MultiplexConsumer::ForgetSema() {
-  for (size_t i = 0, e = Consumers.size(); i != e; ++i)
-    if (SemaConsumer *SC = dyn_cast<SemaConsumer>(Consumers[i]))
+  for (auto &Consumer : Consumers)
+    if (SemaConsumer *SC = dyn_cast<SemaConsumer>(Consumer.get()))
       SC->ForgetSema();
 }
diff --git a/contrib/llvm/tools/clang/lib/Frontend/PrintPreprocessedOutput.cpp b/contrib/llvm/tools/clang/lib/Frontend/PrintPreprocessedOutput.cpp
index 4a6f8db..7c1d9a5 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/PrintPreprocessedOutput.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/PrintPreprocessedOutput.cpp
@@ -332,7 +332,10 @@ void PrintPPOutputPPCallbacks::InclusionDirective(SourceLocation HashLoc,
     MoveToLine(HashLoc);
     OS << "@import " << Imported->getFullModuleName() << ";"
        << " /* clang -E: implicit import for \"" << File->getName() << "\" */";
+    // Since we want a newline after the @import, but not a #<line>, start a new
+    // line immediately.
     EmittedTokensOnThisLine = true;
+    startNewLineIfNeeded();
   }
 }
 
@@ -724,7 +727,7 @@ void clang::DoPrintPreprocessedInput(Preprocessor &PP, raw_ostream *OS,
   PP.AddPragmaHandler("clang",
                       new UnknownPragmaHandler("#pragma clang", Callbacks));
 
-  PP.addPPCallbacks(Callbacks);
+  PP.addPPCallbacks(std::unique_ptr<PPCallbacks>(Callbacks));
 
   // After we have configured the preprocessor, enter the main file.
   PP.EnterMainSourceFile();
diff --git a/contrib/llvm/tools/clang/lib/Frontend/Rewrite/FixItRewriter.cpp b/contrib/llvm/tools/clang/lib/Frontend/Rewrite/FixItRewriter.cpp
index 8b7af71..a3e14f9 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/Rewrite/FixItRewriter.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/Rewrite/FixItRewriter.cpp
@@ -36,14 +36,13 @@ FixItRewriter::FixItRewriter(DiagnosticsEngine &Diags, SourceManager &SourceMgr,
     FixItOpts(FixItOpts),
     NumFailures(0),
     PrevDiagSilenced(false) {
-  OwnsClient = Diags.ownsClient();
-  Client = Diags.takeClient();
-  Diags.setClient(this);
+  Owner = Diags.takeClient();
+  Client = Diags.getClient();
+  Diags.setClient(this, false);
 }
 
 FixItRewriter::~FixItRewriter() {
-  Diags.takeClient();
-  Diags.setClient(Client, OwnsClient);
+  Diags.setClient(Client, Owner.release() != nullptr);
 }
 
 bool FixItRewriter::WriteFixedFile(FileID ID, raw_ostream &OS) {
@@ -86,17 +85,16 @@ bool FixItRewriter::WriteFixedFiles(
     const FileEntry *Entry = Rewrite.getSourceMgr().getFileEntryForID(I->first);
     int fd;
     std::string Filename = FixItOpts->RewriteFilename(Entry->getName(), fd);
-    std::string Err;
+    std::error_code EC;
     std::unique_ptr<llvm::raw_fd_ostream> OS;
     if (fd != -1) {
       OS.reset(new llvm::raw_fd_ostream(fd, /*shouldClose=*/true));
     } else {
-      OS.reset(new llvm::raw_fd_ostream(Filename.c_str(), Err,
-                                        llvm::sys::fs::F_None));
+      OS.reset(new llvm::raw_fd_ostream(Filename, EC, llvm::sys::fs::F_None));
     }
-    if (!Err.empty()) {
-      Diags.Report(clang::diag::err_fe_unable_to_open_output)
-          << Filename << Err;
+    if (EC) {
+      Diags.Report(clang::diag::err_fe_unable_to_open_output) << Filename
+                                                              << EC.message();
       continue;
     }
     RewriteBuffer &RewriteBuf = I->second;
@@ -189,12 +187,10 @@ void FixItRewriter::Diag(SourceLocation Loc, unsigned DiagID) {
   // When producing this diagnostic, we temporarily bypass ourselves,
   // clear out any current diagnostic, and let the downstream client
   // format the diagnostic.
-  Diags.takeClient();
-  Diags.setClient(Client);
+  Diags.setClient(Client, false);
   Diags.Clear();
   Diags.Report(Loc, DiagID);
-  Diags.takeClient();
-  Diags.setClient(this);
+  Diags.setClient(this, false);
 }
 
 FixItOptions::~FixItOptions() {}
diff --git a/contrib/llvm/tools/clang/lib/Frontend/Rewrite/FrontendActions.cpp b/contrib/llvm/tools/clang/lib/Frontend/Rewrite/FrontendActions.cpp
index 59fef73..1b5eb28 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/Rewrite/FrontendActions.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/Rewrite/FrontendActions.cpp
@@ -30,8 +30,8 @@ using namespace clang;
 // AST Consumer Actions
 //===----------------------------------------------------------------------===//
 
-ASTConsumer *HTMLPrintAction::CreateASTConsumer(CompilerInstance &CI,
-                                                StringRef InFile) {
+std::unique_ptr<ASTConsumer>
+HTMLPrintAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
   if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
     return CreateHTMLPrinter(OS, CI.getPreprocessor());
   return nullptr;
@@ -40,9 +40,9 @@ ASTConsumer *HTMLPrintAction::CreateASTConsumer(CompilerInstance &CI,
 FixItAction::FixItAction() {}
 FixItAction::~FixItAction() {}
 
-ASTConsumer *FixItAction::CreateASTConsumer(CompilerInstance &CI,
-                                            StringRef InFile) {
-  return new ASTConsumer();
+std::unique_ptr<ASTConsumer>
+FixItAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
+  return llvm::make_unique<ASTConsumer>();
 }
 
 namespace {
@@ -148,8 +148,8 @@ bool FixItRecompile::BeginInvocation(CompilerInstance &CI) {
 
 #ifdef CLANG_ENABLE_OBJC_REWRITER
 
-ASTConsumer *RewriteObjCAction::CreateASTConsumer(CompilerInstance &CI,
-                                                  StringRef InFile) {
+std::unique_ptr<ASTConsumer>
+RewriteObjCAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
   if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile, "cpp")) {
     if (CI.getLangOpts().ObjCRuntime.isNonFragile())
       return CreateModernObjCRewriter(InFile, OS,
diff --git a/contrib/llvm/tools/clang/lib/Frontend/Rewrite/HTMLPrint.cpp b/contrib/llvm/tools/clang/lib/Frontend/Rewrite/HTMLPrint.cpp
index 64da05f..22ccfe6 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/Rewrite/HTMLPrint.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/Rewrite/HTMLPrint.cpp
@@ -47,11 +47,12 @@ namespace {
   };
 }
 
-ASTConsumer* clang::CreateHTMLPrinter(raw_ostream *OS,
-                                      Preprocessor &PP,
-                                      bool SyntaxHighlight,
-                                      bool HighlightMacros) {
-  return new HTMLPrinter(OS, PP, SyntaxHighlight, HighlightMacros);
+std::unique_ptr<ASTConsumer> clang::CreateHTMLPrinter(raw_ostream *OS,
+                                                      Preprocessor &PP,
+                                                      bool SyntaxHighlight,
+                                                      bool HighlightMacros) {
+  return llvm::make_unique<HTMLPrinter>(OS, PP, SyntaxHighlight,
+                                        HighlightMacros);
 }
 
 void HTMLPrinter::Initialize(ASTContext &context) {
diff --git a/contrib/llvm/tools/clang/lib/Frontend/Rewrite/InclusionRewriter.cpp b/contrib/llvm/tools/clang/lib/Frontend/Rewrite/InclusionRewriter.cpp
index aa7017b..1400557 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/Rewrite/InclusionRewriter.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/Rewrite/InclusionRewriter.cpp
@@ -40,6 +40,7 @@ class InclusionRewriter : public PPCallbacks {
   Preprocessor &PP; ///< Used to find inclusion directives.
   SourceManager &SM; ///< Used to read and manage source files.
   raw_ostream &OS; ///< The destination stream for rewritten contents.
+  StringRef MainEOL; ///< The line ending marker to use.
   const llvm::MemoryBuffer *PredefinesBuffer; ///< The preprocessor predefines.
   bool ShowLineMarkers; ///< Show #line markers.
   bool UseLineDirective; ///< Use of line directives or line markers.
@@ -54,6 +55,7 @@ public:
   void setPredefinesBuffer(const llvm::MemoryBuffer *Buf) {
     PredefinesBuffer = Buf;
   }
+  void detectMainFileEOL();
 private:
   void FileChanged(SourceLocation Loc, FileChangeReason Reason,
                    SrcMgr::CharacteristicKind FileType,
@@ -67,8 +69,8 @@ private:
                           const Module *Imported) override;
   void WriteLineInfo(const char *Filename, int Line,
                      SrcMgr::CharacteristicKind FileType,
-                     StringRef EOL, StringRef Extra = StringRef());
-  void WriteImplicitModuleImport(const Module *Mod, StringRef EOL);
+                     StringRef Extra = StringRef());
+  void WriteImplicitModuleImport(const Module *Mod);
   void OutputContentUpTo(const MemoryBuffer &FromFile,
                          unsigned &WriteFrom, unsigned WriteTo,
                          StringRef EOL, int &lines,
@@ -88,9 +90,9 @@ private:
 /// Initializes an InclusionRewriter with a \p PP source and \p OS destination.
 InclusionRewriter::InclusionRewriter(Preprocessor &PP, raw_ostream &OS,
                                      bool ShowLineMarkers)
-  : PP(PP), SM(PP.getSourceManager()), OS(OS), PredefinesBuffer(nullptr),
-    ShowLineMarkers(ShowLineMarkers),
-    LastInsertedFileChange(FileChanges.end()) {
+    : PP(PP), SM(PP.getSourceManager()), OS(OS), MainEOL("\n"),
+      PredefinesBuffer(nullptr), ShowLineMarkers(ShowLineMarkers),
+      LastInsertedFileChange(FileChanges.end()) {
   // If we're in microsoft mode, use normal #line instead of line markers.
   UseLineDirective = PP.getLangOpts().MicrosoftExt;
 }
@@ -101,7 +103,7 @@ InclusionRewriter::InclusionRewriter(Preprocessor &PP, raw_ostream &OS,
 /// any \p Extra context specifiers in GNU line directives.
 void InclusionRewriter::WriteLineInfo(const char *Filename, int Line,
                                       SrcMgr::CharacteristicKind FileType,
-                                      StringRef EOL, StringRef Extra) {
+                                      StringRef Extra) {
   if (!ShowLineMarkers)
     return;
   if (UseLineDirective) {
@@ -125,13 +127,12 @@ void InclusionRewriter::WriteLineInfo(const char *Filename, int Line,
       // should be treated as being wrapped in an implicit extern "C" block."
       OS << " 3 4";
   }
-  OS << EOL;
+  OS << MainEOL;
 }
 
-void InclusionRewriter::WriteImplicitModuleImport(const Module *Mod,
-                                                  StringRef EOL) {
+void InclusionRewriter::WriteImplicitModuleImport(const Module *Mod) {
   OS << "@import " << Mod->getFullModuleName() << ";"
-     << " /* clang -frewrite-includes: implicit import */" << EOL;
+     << " /* clang -frewrite-includes: implicit import */" << MainEOL;
 }
 
 /// FileChanged - Whenever the preprocessor enters or exits a #include file
@@ -197,23 +198,33 @@ InclusionRewriter::FindFileChangeLocation(SourceLocation Loc) const {
 /// Detect the likely line ending style of \p FromFile by examining the first
 /// newline found within it.
 static StringRef DetectEOL(const MemoryBuffer &FromFile) {
-  // detect what line endings the file uses, so that added content does not mix
-  // the style
+  // Detect what line endings the file uses, so that added content does not mix
+  // the style. We need to check for "\r\n" first because "\n\r" will match
+  // "\r\n\r\n".
   const char *Pos = strchr(FromFile.getBufferStart(), '\n');
   if (!Pos)
     return "\n";
-  if (Pos + 1 < FromFile.getBufferEnd() && Pos[1] == '\r')
-    return "\n\r";
   if (Pos - 1 >= FromFile.getBufferStart() && Pos[-1] == '\r')
     return "\r\n";
+  if (Pos + 1 < FromFile.getBufferEnd() && Pos[1] == '\r')
+    return "\n\r";
   return "\n";
 }
 
+void InclusionRewriter::detectMainFileEOL() {
+  bool Invalid;
+  const MemoryBuffer &FromFile = *SM.getBuffer(SM.getMainFileID(), &Invalid);
+  assert(!Invalid);
+  if (Invalid)
+    return; // Should never happen, but whatever.
+  MainEOL = DetectEOL(FromFile);
+}
+
 /// Writes out bytes from \p FromFile, starting at \p NextToWrite and ending at
 /// \p WriteTo - 1.
 void InclusionRewriter::OutputContentUpTo(const MemoryBuffer &FromFile,
                                           unsigned &WriteFrom, unsigned WriteTo,
-                                          StringRef EOL, int &Line,
+                                          StringRef LocalEOL, int &Line,
                                           bool EnsureNewline) {
   if (WriteTo <= WriteFrom)
     return;
@@ -222,14 +233,37 @@ void InclusionRewriter::OutputContentUpTo(const MemoryBuffer &FromFile,
     WriteFrom = WriteTo;
     return;
   }
-  OS.write(FromFile.getBufferStart() + WriteFrom, WriteTo - WriteFrom);
-  // count lines manually, it's faster than getPresumedLoc()
-  Line += std::count(FromFile.getBufferStart() + WriteFrom,
-                     FromFile.getBufferStart() + WriteTo, '\n');
-  if (EnsureNewline) {
-    char LastChar = FromFile.getBufferStart()[WriteTo - 1];
-    if (LastChar != '\n' && LastChar != '\r')
-      OS << EOL;
+
+  // If we would output half of a line ending, advance one character to output
+  // the whole line ending.  All buffers are null terminated, so looking ahead
+  // one byte is safe.
+  if (LocalEOL.size() == 2 &&
+      LocalEOL[0] == (FromFile.getBufferStart() + WriteTo)[-1] &&
+      LocalEOL[1] == (FromFile.getBufferStart() + WriteTo)[0])
+    WriteTo++;
+
+  StringRef TextToWrite(FromFile.getBufferStart() + WriteFrom,
+                        WriteTo - WriteFrom);
+
+  if (MainEOL == LocalEOL) {
+    OS << TextToWrite;
+    // count lines manually, it's faster than getPresumedLoc()
+    Line += TextToWrite.count(LocalEOL);
+    if (EnsureNewline && !TextToWrite.endswith(LocalEOL))
+      OS << MainEOL;
+  } else {
+    // Output the file one line at a time, rewriting the line endings as we go.
+    StringRef Rest = TextToWrite;
+    while (!Rest.empty()) {
+      StringRef LineText;
+      std::tie(LineText, Rest) = Rest.split(LocalEOL);
+      OS << LineText;
+      Line++;
+      if (!Rest.empty())
+        OS << MainEOL;
+    }
+    if (TextToWrite.endswith(LocalEOL) || EnsureNewline)
+      OS << MainEOL;
   }
   WriteFrom = WriteTo;
 }
@@ -242,10 +276,11 @@ void InclusionRewriter::OutputContentUpTo(const MemoryBuffer &FromFile,
 void InclusionRewriter::CommentOutDirective(Lexer &DirectiveLex,
                                             const Token &StartToken,
                                             const MemoryBuffer &FromFile,
-                                            StringRef EOL,
+                                            StringRef LocalEOL,
                                             unsigned &NextToWrite, int &Line) {
   OutputContentUpTo(FromFile, NextToWrite,
-    SM.getFileOffset(StartToken.getLocation()), EOL, Line, false);
+                    SM.getFileOffset(StartToken.getLocation()), LocalEOL, Line,
+                    false);
   Token DirectiveToken;
   do {
     DirectiveLex.LexFromRawLexer(DirectiveToken);
@@ -254,11 +289,12 @@ void InclusionRewriter::CommentOutDirective(Lexer &DirectiveLex,
     // OutputContentUpTo() would not output anything anyway.
     return;
   }
-  OS << "#if 0 /* expanded by -frewrite-includes */" << EOL;
+  OS << "#if 0 /* expanded by -frewrite-includes */" << MainEOL;
   OutputContentUpTo(FromFile, NextToWrite,
-    SM.getFileOffset(DirectiveToken.getLocation()) + DirectiveToken.getLength(),
-    EOL, Line, true);
-  OS << "#endif /* expanded by -frewrite-includes */" << EOL;
+                    SM.getFileOffset(DirectiveToken.getLocation()) +
+                        DirectiveToken.getLength(),
+                    LocalEOL, Line, true);
+  OS << "#endif /* expanded by -frewrite-includes */" << MainEOL;
 }
 
 /// Find the next identifier in the pragma directive specified by \p RawToken.
@@ -333,10 +369,13 @@ bool InclusionRewriter::HandleHasInclude(
   // FIXME: Subframeworks aren't handled here. Do we care?
   bool isAngled = PP.GetIncludeFilenameSpelling(Tok.getLocation(), Filename);
   const DirectoryLookup *CurDir;
+  const FileEntry *FileEnt = PP.getSourceManager().getFileEntryForID(FileId);
+  SmallVector<std::pair<const FileEntry *, const DirectoryEntry *>, 1>
+      Includers;
+  Includers.push_back(std::make_pair(FileEnt, FileEnt->getDir()));
   const FileEntry *File = PP.getHeaderSearchInfo().LookupFile(
-      Filename, SourceLocation(), isAngled, nullptr, CurDir,
-      PP.getSourceManager().getFileEntryForID(FileId), nullptr, nullptr,
-      nullptr, false);
+      Filename, SourceLocation(), isAngled, nullptr, CurDir, Includers, nullptr,
+      nullptr, nullptr, false);
 
   FileExists = File != nullptr;
   return true;
@@ -355,13 +394,13 @@ bool InclusionRewriter::Process(FileID FileId,
   Lexer RawLex(FileId, &FromFile, PP.getSourceManager(), PP.getLangOpts());
   RawLex.SetCommentRetentionState(false);
 
-  StringRef EOL = DetectEOL(FromFile);
+  StringRef LocalEOL = DetectEOL(FromFile);
 
   // Per the GNU docs: "1" indicates entering a new file.
   if (FileId == SM.getMainFileID() || FileId == PP.getPredefinesFileID())
-    WriteLineInfo(FileName, 1, FileType, EOL, "");
+    WriteLineInfo(FileName, 1, FileType, "");
   else
-    WriteLineInfo(FileName, 1, FileType, EOL, " 1");
+    WriteLineInfo(FileName, 1, FileType, " 1");
 
   if (SM.getFileIDSize(FileId) == 0)
     return false;
@@ -389,15 +428,15 @@ bool InclusionRewriter::Process(FileID FileId,
           case tok::pp_include:
           case tok::pp_include_next:
           case tok::pp_import: {
-            CommentOutDirective(RawLex, HashToken, FromFile, EOL, NextToWrite,
+            CommentOutDirective(RawLex, HashToken, FromFile, LocalEOL, NextToWrite,
               Line);
             if (FileId != PP.getPredefinesFileID())
-              WriteLineInfo(FileName, Line - 1, FileType, EOL, "");
+              WriteLineInfo(FileName, Line - 1, FileType, "");
             StringRef LineInfoExtra;
             if (const FileChange *Change = FindFileChangeLocation(
                 HashToken.getLocation())) {
               if (Change->Mod) {
-                WriteImplicitModuleImport(Change->Mod, EOL);
+                WriteImplicitModuleImport(Change->Mod);
 
               // else now include and recursively process the file
               } else if (Process(Change->Id, Change->FileType)) {
@@ -410,7 +449,7 @@ bool InclusionRewriter::Process(FileID FileId,
             }
             // fix up lineinfo (since commented out directive changed line
             // numbers) for inclusions that were skipped due to header guards
-            WriteLineInfo(FileName, Line, FileType, EOL, LineInfoExtra);
+            WriteLineInfo(FileName, Line, FileType, LineInfoExtra);
             break;
           }
           case tok::pp_pragma: {
@@ -418,17 +457,17 @@ bool InclusionRewriter::Process(FileID FileId,
             if (Identifier == "clang" || Identifier == "GCC") {
               if (NextIdentifierName(RawLex, RawToken) == "system_header") {
                 // keep the directive in, commented out
-                CommentOutDirective(RawLex, HashToken, FromFile, EOL,
+                CommentOutDirective(RawLex, HashToken, FromFile, LocalEOL,
                   NextToWrite, Line);
                 // update our own type
                 FileType = SM.getFileCharacteristic(RawToken.getLocation());
-                WriteLineInfo(FileName, Line, FileType, EOL);
+                WriteLineInfo(FileName, Line, FileType);
               }
             } else if (Identifier == "once") {
               // keep the directive in, commented out
-              CommentOutDirective(RawLex, HashToken, FromFile, EOL,
+              CommentOutDirective(RawLex, HashToken, FromFile, LocalEOL,
                 NextToWrite, Line);
-              WriteLineInfo(FileName, Line, FileType, EOL);
+              WriteLineInfo(FileName, Line, FileType);
             }
             break;
           }
@@ -468,12 +507,12 @@ bool InclusionRewriter::Process(FileID FileId,
                 // Replace the macro with (0) or (1), followed by the commented
                 // out macro for reference.
                 OutputContentUpTo(FromFile, NextToWrite, SM.getFileOffset(Loc),
-                                  EOL, Line, false);
+                                  LocalEOL, Line, false);
                 OS << '(' << (int) HasFile << ")/*";
                 OutputContentUpTo(FromFile, NextToWrite,
                                   SM.getFileOffset(RawToken.getLocation()) +
-                                  RawToken.getLength(),
-                                  EOL, Line, false);
+                                      RawToken.getLength(),
+                                  LocalEOL, Line, false);
                 OS << "*/";
               }
             } while (RawToken.isNot(tok::eod));
@@ -481,8 +520,8 @@ bool InclusionRewriter::Process(FileID FileId,
               OutputContentUpTo(FromFile, NextToWrite,
                                 SM.getFileOffset(RawToken.getLocation()) +
                                     RawToken.getLength(),
-                                EOL, Line, /*EnsureNewLine*/ true);
-              WriteLineInfo(FileName, Line, FileType, EOL);
+                                LocalEOL, Line, /*EnsureNewline=*/ true);
+              WriteLineInfo(FileName, Line, FileType);
             }
             break;
           }
@@ -497,11 +536,11 @@ bool InclusionRewriter::Process(FileID FileId,
             do {
               RawLex.LexFromRawLexer(RawToken);
             } while (RawToken.isNot(tok::eod) && RawToken.isNot(tok::eof));
-            OutputContentUpTo(
-                FromFile, NextToWrite,
-                SM.getFileOffset(RawToken.getLocation()) + RawToken.getLength(),
-                EOL, Line, /*EnsureNewLine*/ true);
-            WriteLineInfo(FileName, Line, FileType, EOL);
+            OutputContentUpTo(FromFile, NextToWrite,
+                              SM.getFileOffset(RawToken.getLocation()) +
+                                  RawToken.getLength(),
+                              LocalEOL, Line, /*EnsureNewline=*/ true);
+            WriteLineInfo(FileName, Line, FileType);
             RawLex.SetKeepWhitespaceMode(false);
           }
           default:
@@ -513,8 +552,8 @@ bool InclusionRewriter::Process(FileID FileId,
     RawLex.LexFromRawLexer(RawToken);
   }
   OutputContentUpTo(FromFile, NextToWrite,
-    SM.getFileOffset(SM.getLocForEndOfFile(FileId)), EOL, Line,
-    /*EnsureNewline*/true);
+                    SM.getFileOffset(SM.getLocForEndOfFile(FileId)), LocalEOL,
+                    Line, /*EnsureNewline=*/true);
   return true;
 }
 
@@ -524,7 +563,9 @@ void clang::RewriteIncludesInInput(Preprocessor &PP, raw_ostream *OS,
   SourceManager &SM = PP.getSourceManager();
   InclusionRewriter *Rewrite = new InclusionRewriter(PP, *OS,
                                                      Opts.ShowLineMarkers);
-  PP.addPPCallbacks(Rewrite);
+  Rewrite->detectMainFileEOL();
+
+  PP.addPPCallbacks(std::unique_ptr<PPCallbacks>(Rewrite));
   PP.IgnorePragmas();
 
   // First let the preprocessor process the entire file and call callbacks.
diff --git a/contrib/llvm/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp b/contrib/llvm/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
index 3e18a8b..47f8189 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/Rewrite/RewriteModernObjC.cpp
@@ -249,27 +249,16 @@ namespace {
     void HandleTranslationUnit(ASTContext &C) override;
 
     void ReplaceStmt(Stmt *Old, Stmt *New) {
-      Stmt *ReplacingStmt = ReplacedNodes[Old];
-
-      if (ReplacingStmt)
-        return; // We can't rewrite the same node twice.
-
-      if (DisableReplaceStmt)
-        return;
-
-      // If replacement succeeded or warning disabled return with no warning.
-      if (!Rewrite.ReplaceStmt(Old, New)) {
-        ReplacedNodes[Old] = New;
-        return;
-      }
-      if (SilenceRewriteMacroWarning)
-        return;
-      Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
-                   << Old->getSourceRange();
+      ReplaceStmtWithRange(Old, New, Old->getSourceRange());
     }
 
     void ReplaceStmtWithRange(Stmt *Old, Stmt *New, SourceRange SrcRange) {
       assert(Old != nullptr && New != nullptr && "Expected non-null Stmt's");
+
+      Stmt *ReplacingStmt = ReplacedNodes[Old];
+      if (ReplacingStmt)
+        return; // We can't rewrite the same node twice.
+
       if (DisableReplaceStmt)
         return;
 
@@ -508,7 +497,7 @@ namespace {
     void GetBlockDeclRefExprs(Stmt *S);
     void GetInnerBlockDeclRefExprs(Stmt *S,
                 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
-                llvm::SmallPtrSet<const DeclContext *, 8> &InnerContexts);
+                llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts);
 
     // We avoid calling Type::isBlockPointerType(), since it operates on the
     // canonical type. We only care if the top-level type is a closure pointer.
@@ -675,14 +664,11 @@ RewriteModernObjC::RewriteModernObjC(std::string inFile, raw_ostream* OS,
                "for @try/@finally (code may not execute properly)");
 }
 
-ASTConsumer *clang::CreateModernObjCRewriter(const std::string& InFile,
-                                       raw_ostream* OS,
-                                       DiagnosticsEngine &Diags,
-                                       const LangOptions &LOpts,
-                                       bool SilenceRewriteMacroWarning,
-                                       bool LineInfo) {
-    return new RewriteModernObjC(InFile, OS, Diags, LOpts,
-                                 SilenceRewriteMacroWarning, LineInfo);
+std::unique_ptr<ASTConsumer> clang::CreateModernObjCRewriter(
+    const std::string &InFile, raw_ostream *OS, DiagnosticsEngine &Diags,
+    const LangOptions &LOpts, bool SilenceRewriteMacroWarning, bool LineInfo) {
+  return llvm::make_unique<RewriteModernObjC>(
+      InFile, OS, Diags, LOpts, SilenceRewriteMacroWarning, LineInfo);
 }
 
 void RewriteModernObjC::InitializeCommon(ASTContext &context) {
@@ -4055,7 +4041,7 @@ void RewriteModernObjC::RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
   endBuf += Lexer::MeasureTokenLength(LocEnd, *SM, LangOpts);
   ReplaceText(LocStart, endBuf-startBuf, Result);
   // Mark this struct as having been generated.
-  if (!ObjCSynthesizedStructs.insert(CDecl))
+  if (!ObjCSynthesizedStructs.insert(CDecl).second)
     llvm_unreachable("struct already synthesize- RewriteObjCInternalStruct");
 }
 
@@ -4070,9 +4056,7 @@ void RewriteModernObjC::RewriteIvarOffsetSymbols(ObjCInterfaceDecl *CDecl,
     return;
   
   llvm::DenseSet<std::pair<const ObjCInterfaceDecl*, unsigned> > GroupSymbolOutput;
-  for (llvm::SmallPtrSet<ObjCIvarDecl *, 8>::iterator i = Ivars.begin(),
-       e = Ivars.end(); i != e; i++) {
-    ObjCIvarDecl *IvarDecl = (*i);
+  for (ObjCIvarDecl *IvarDecl : Ivars) {
     const ObjCInterfaceDecl *IDecl = IvarDecl->getContainingInterface();
     unsigned GroupNo = 0;
     if (IvarDecl->isBitField()) {
@@ -4256,14 +4240,12 @@ std::string RewriteModernObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
   S += "(" + StructRef;
   S += "*dst, " + StructRef;
   S += "*src) {";
-  for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = ImportedBlockDecls.begin(),
-      E = ImportedBlockDecls.end(); I != E; ++I) {
-    ValueDecl *VD = (*I);
+  for (ValueDecl *VD : ImportedBlockDecls) {
     S += "_Block_object_assign((void*)&dst->";
-    S += (*I)->getNameAsString();
+    S += VD->getNameAsString();
     S += ", (void*)src->";
-    S += (*I)->getNameAsString();
-    if (BlockByRefDeclsPtrSet.count((*I)))
+    S += VD->getNameAsString();
+    if (BlockByRefDeclsPtrSet.count(VD))
       S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
     else if (VD->getType()->isBlockPointerType())
       S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
@@ -4277,12 +4259,10 @@ std::string RewriteModernObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
   S += "_block_dispose_" + utostr(i);
   S += "(" + StructRef;
   S += "*src) {";
-  for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = ImportedBlockDecls.begin(),
-      E = ImportedBlockDecls.end(); I != E; ++I) {
-    ValueDecl *VD = (*I);
+  for (ValueDecl *VD : ImportedBlockDecls) {
     S += "_Block_object_dispose((void*)src->";
-    S += (*I)->getNameAsString();
-    if (BlockByRefDeclsPtrSet.count((*I)))
+    S += VD->getNameAsString();
+    if (BlockByRefDeclsPtrSet.count(VD))
       S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
     else if (VD->getType()->isBlockPointerType())
       S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
@@ -4583,22 +4563,18 @@ void RewriteModernObjC::GetBlockDeclRefExprs(Stmt *S) {
         GetBlockDeclRefExprs(*CI);
     }
   // Handle specific things.
-  if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
-    if (DRE->refersToEnclosingLocal()) {
+  if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S))
+    if (DRE->refersToEnclosingVariableOrCapture() ||
+        HasLocalVariableExternalStorage(DRE->getDecl()))
       // FIXME: Handle enums.
-      if (!isa<FunctionDecl>(DRE->getDecl()))
-        BlockDeclRefs.push_back(DRE);
-      if (HasLocalVariableExternalStorage(DRE->getDecl()))
-        BlockDeclRefs.push_back(DRE);
-    }
-  }
-  
+      BlockDeclRefs.push_back(DRE);
+
   return;
 }
 
 void RewriteModernObjC::GetInnerBlockDeclRefExprs(Stmt *S,
                 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
-                llvm::SmallPtrSet<const DeclContext *, 8> &InnerContexts) {
+                llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts) {
   for (Stmt::child_range CI = S->children(); CI; ++CI)
     if (*CI) {
       if (BlockExpr *CBE = dyn_cast<BlockExpr>(*CI)) {
@@ -4615,11 +4591,11 @@ void RewriteModernObjC::GetInnerBlockDeclRefExprs(Stmt *S,
     }
   // Handle specific things.
   if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
-    if (DRE->refersToEnclosingLocal()) {
-      if (!isa<FunctionDecl>(DRE->getDecl()) &&
-          !InnerContexts.count(DRE->getDecl()->getDeclContext()))
+    if (DRE->refersToEnclosingVariableOrCapture() ||
+        HasLocalVariableExternalStorage(DRE->getDecl())) {
+      if (!InnerContexts.count(DRE->getDecl()->getDeclContext()))
         InnerBlockDeclRefs.push_back(DRE);
-      if (VarDecl *Var = dyn_cast<VarDecl>(DRE->getDecl()))
+      if (VarDecl *Var = cast<VarDecl>(DRE->getDecl()))
         if (Var->isFunctionOrMethodVarDecl())
           ImportedLocalExternalDecls.insert(Var);
     }
@@ -4796,7 +4772,8 @@ Stmt *RewriteModernObjC::RewriteBlockDeclRefExpr(DeclRefExpr *DeclRefExp) {
   // Rewrite the byref variable into BYREFVAR->__forwarding->BYREFVAR 
   // for each DeclRefExp where BYREFVAR is name of the variable.
   ValueDecl *VD = DeclRefExp->getDecl();
-  bool isArrow = DeclRefExp->refersToEnclosingLocal();
+  bool isArrow = DeclRefExp->refersToEnclosingVariableOrCapture() ||
+                 HasLocalVariableExternalStorage(DeclRefExp->getDecl());
 
   FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
                                     SourceLocation(),
@@ -5546,6 +5523,10 @@ Stmt *RewriteModernObjC::SynthBlockInitExpr(BlockExpr *Exp,
                              VK_RValue, OK_Ordinary, SourceLocation());
   NewRep = NoTypeInfoCStyleCastExpr(Context, FType, CK_BitCast,
                                     NewRep);
+  // Put Paren around the call.
+  NewRep = new (Context) ParenExpr(SourceLocation(), SourceLocation(),
+                                   NewRep);
+  
   BlockDeclRefs.clear();
   BlockByRefDecls.clear();
   BlockByRefDeclsPtrSet.clear();
@@ -5978,10 +5959,9 @@ void RewriteModernObjC::HandleTranslationUnit(ASTContext &C) {
 
   // Here's a great place to add any extra declarations that may be needed.
   // Write out meta data for each @protocol(<expr>).
-  for (llvm::SmallPtrSet<ObjCProtocolDecl *,8>::iterator I = ProtocolExprDecls.begin(),
-       E = ProtocolExprDecls.end(); I != E; ++I) {
-    RewriteObjCProtocolMetaData(*I, Preamble);
-    Write_ProtocolExprReferencedMetadata(Context, (*I), Preamble);
+  for (ObjCProtocolDecl *ProtDecl : ProtocolExprDecls) {
+    RewriteObjCProtocolMetaData(ProtDecl, Preamble);
+    Write_ProtocolExprReferencedMetadata(Context, ProtDecl, Preamble);
   }
 
   InsertText(SM->getLocForStartOfFile(MainFileID), Preamble, false);
@@ -7122,7 +7102,7 @@ void RewriteModernObjC::RewriteObjCProtocolMetaData(ObjCProtocolDecl *PDecl,
   Result += ";\n";
     
   // Mark this protocol as having been generated.
-  if (!ObjCSynthesizedProtocols.insert(PDecl->getCanonicalDecl()))
+  if (!ObjCSynthesizedProtocols.insert(PDecl->getCanonicalDecl()).second)
     llvm_unreachable("protocol already synthesized");
   
 }
diff --git a/contrib/llvm/tools/clang/lib/Frontend/Rewrite/RewriteObjC.cpp b/contrib/llvm/tools/clang/lib/Frontend/Rewrite/RewriteObjC.cpp
index 7a72177..5196810 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/Rewrite/RewriteObjC.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/Rewrite/RewriteObjC.cpp
@@ -198,27 +198,16 @@ namespace {
     void HandleTranslationUnit(ASTContext &C) override;
 
     void ReplaceStmt(Stmt *Old, Stmt *New) {
-      Stmt *ReplacingStmt = ReplacedNodes[Old];
-
-      if (ReplacingStmt)
-        return; // We can't rewrite the same node twice.
-
-      if (DisableReplaceStmt)
-        return;
-
-      // If replacement succeeded or warning disabled return with no warning.
-      if (!Rewrite.ReplaceStmt(Old, New)) {
-        ReplacedNodes[Old] = New;
-        return;
-      }
-      if (SilenceRewriteMacroWarning)
-        return;
-      Diags.Report(Context->getFullLoc(Old->getLocStart()), RewriteFailedDiag)
-                   << Old->getSourceRange();
+      ReplaceStmtWithRange(Old, New, Old->getSourceRange());
     }
 
     void ReplaceStmtWithRange(Stmt *Old, Stmt *New, SourceRange SrcRange) {
       assert(Old != nullptr && New != nullptr && "Expected non-null Stmt's");
+
+      Stmt *ReplacingStmt = ReplacedNodes[Old];
+      if (ReplacingStmt)
+        return; // We can't rewrite the same node twice.
+
       if (DisableReplaceStmt)
         return;
 
@@ -332,7 +321,7 @@ namespace {
     void RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
                                       std::string &Result);
 
-    virtual void Initialize(ASTContext &context) override = 0;
+    void Initialize(ASTContext &context) override = 0;
 
     // Metadata Rewriting.
     virtual void RewriteMetaDataIntoBuffer(std::string &Result) = 0;
@@ -413,7 +402,7 @@ namespace {
     void GetBlockDeclRefExprs(Stmt *S);
     void GetInnerBlockDeclRefExprs(Stmt *S,
                 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
-                llvm::SmallPtrSet<const DeclContext *, 8> &InnerContexts);
+                llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts);
 
     // We avoid calling Type::isBlockPointerType(), since it operates on the
     // canonical type. We only care if the top-level type is a closure pointer.
@@ -524,7 +513,7 @@ namespace {
                                                      silenceMacroWarn) {}
     
     ~RewriteObjCFragileABI() {}
-    virtual void Initialize(ASTContext &context) override;
+    void Initialize(ASTContext &context) override;
 
     // Rewriting metadata
     template<typename MethodIterator>
@@ -600,12 +589,12 @@ RewriteObjC::RewriteObjC(std::string inFile, raw_ostream* OS,
                "for @try/@finally (code may not execute properly)");
 }
 
-ASTConsumer *clang::CreateObjCRewriter(const std::string& InFile,
-                                       raw_ostream* OS,
-                                       DiagnosticsEngine &Diags,
-                                       const LangOptions &LOpts,
-                                       bool SilenceRewriteMacroWarning) {
-  return new RewriteObjCFragileABI(InFile, OS, Diags, LOpts, SilenceRewriteMacroWarning);
+std::unique_ptr<ASTConsumer>
+clang::CreateObjCRewriter(const std::string &InFile, raw_ostream *OS,
+                          DiagnosticsEngine &Diags, const LangOptions &LOpts,
+                          bool SilenceRewriteMacroWarning) {
+  return llvm::make_unique<RewriteObjCFragileABI>(InFile, OS, Diags, LOpts,
+                                                  SilenceRewriteMacroWarning);
 }
 
 void RewriteObjC::InitializeCommon(ASTContext &context) {
@@ -3238,7 +3227,7 @@ void RewriteObjC::RewriteObjCInternalStruct(ObjCInterfaceDecl *CDecl,
     ReplaceText(LocStart, endBuf-startBuf, Result);
   }
   // Mark this struct as having been generated.
-  if (!ObjCSynthesizedStructs.insert(CDecl))
+  if (!ObjCSynthesizedStructs.insert(CDecl).second)
     llvm_unreachable("struct already synthesize- SynthesizeObjCInternalStruct");
 }
 
@@ -3382,14 +3371,12 @@ std::string RewriteObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
   S += "(" + StructRef;
   S += "*dst, " + StructRef;
   S += "*src) {";
-  for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = ImportedBlockDecls.begin(),
-      E = ImportedBlockDecls.end(); I != E; ++I) {
-    ValueDecl *VD = (*I);
+  for (ValueDecl *VD : ImportedBlockDecls) {
     S += "_Block_object_assign((void*)&dst->";
-    S += (*I)->getNameAsString();
+    S += VD->getNameAsString();
     S += ", (void*)src->";
-    S += (*I)->getNameAsString();
-    if (BlockByRefDeclsPtrSet.count((*I)))
+    S += VD->getNameAsString();
+    if (BlockByRefDeclsPtrSet.count(VD))
       S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
     else if (VD->getType()->isBlockPointerType())
       S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
@@ -3403,12 +3390,10 @@ std::string RewriteObjC::SynthesizeBlockHelperFuncs(BlockExpr *CE, int i,
   S += "_block_dispose_" + utostr(i);
   S += "(" + StructRef;
   S += "*src) {";
-  for (llvm::SmallPtrSet<ValueDecl*,8>::iterator I = ImportedBlockDecls.begin(),
-      E = ImportedBlockDecls.end(); I != E; ++I) {
-    ValueDecl *VD = (*I);
+  for (ValueDecl *VD : ImportedBlockDecls) {
     S += "_Block_object_dispose((void*)src->";
-    S += (*I)->getNameAsString();
-    if (BlockByRefDeclsPtrSet.count((*I)))
+    S += VD->getNameAsString();
+    if (BlockByRefDeclsPtrSet.count(VD))
       S += ", " + utostr(BLOCK_FIELD_IS_BYREF) + "/*BLOCK_FIELD_IS_BYREF*/);";
     else if (VD->getType()->isBlockPointerType())
       S += ", " + utostr(BLOCK_FIELD_IS_BLOCK) + "/*BLOCK_FIELD_IS_BLOCK*/);";
@@ -3686,22 +3671,18 @@ void RewriteObjC::GetBlockDeclRefExprs(Stmt *S) {
         GetBlockDeclRefExprs(*CI);
     }
   // Handle specific things.
-  if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
-    if (DRE->refersToEnclosingLocal()) {
+  if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S))
+    if (DRE->refersToEnclosingVariableOrCapture() ||
+        HasLocalVariableExternalStorage(DRE->getDecl()))
       // FIXME: Handle enums.
-      if (!isa<FunctionDecl>(DRE->getDecl()))
-        BlockDeclRefs.push_back(DRE);
-      if (HasLocalVariableExternalStorage(DRE->getDecl()))
-        BlockDeclRefs.push_back(DRE);
-    }
-  }
-  
+      BlockDeclRefs.push_back(DRE);
+
   return;
 }
 
 void RewriteObjC::GetInnerBlockDeclRefExprs(Stmt *S,
                 SmallVectorImpl<DeclRefExpr *> &InnerBlockDeclRefs,
-                llvm::SmallPtrSet<const DeclContext *, 8> &InnerContexts) {
+                llvm::SmallPtrSetImpl<const DeclContext *> &InnerContexts) {
   for (Stmt::child_range CI = S->children(); CI; ++CI)
     if (*CI) {
       if (BlockExpr *CBE = dyn_cast<BlockExpr>(*CI)) {
@@ -3718,11 +3699,11 @@ void RewriteObjC::GetInnerBlockDeclRefExprs(Stmt *S,
     }
   // Handle specific things.
   if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(S)) {
-    if (DRE->refersToEnclosingLocal()) {
-      if (!isa<FunctionDecl>(DRE->getDecl()) &&
-          !InnerContexts.count(DRE->getDecl()->getDeclContext()))
+    if (DRE->refersToEnclosingVariableOrCapture() ||
+        HasLocalVariableExternalStorage(DRE->getDecl())) {
+      if (!InnerContexts.count(DRE->getDecl()->getDeclContext()))
         InnerBlockDeclRefs.push_back(DRE);
-      if (VarDecl *Var = dyn_cast<VarDecl>(DRE->getDecl()))
+      if (VarDecl *Var = cast<VarDecl>(DRE->getDecl()))
         if (Var->isFunctionOrMethodVarDecl())
           ImportedLocalExternalDecls.insert(Var);
     }
@@ -3880,7 +3861,8 @@ Stmt *RewriteObjC::RewriteBlockDeclRefExpr(DeclRefExpr *DeclRefExp) {
   // Rewrite the byref variable into BYREFVAR->__forwarding->BYREFVAR 
   // for each DeclRefExp where BYREFVAR is name of the variable.
   ValueDecl *VD = DeclRefExp->getDecl();
-  bool isArrow = DeclRefExp->refersToEnclosingLocal();
+  bool isArrow = DeclRefExp->refersToEnclosingVariableOrCapture() ||
+                 HasLocalVariableExternalStorage(DeclRefExp->getDecl());
 
   FieldDecl *FD = FieldDecl::Create(*Context, nullptr, SourceLocation(),
                                     SourceLocation(),
@@ -4967,9 +4949,8 @@ void RewriteObjC::HandleTranslationUnit(ASTContext &C) {
 
   // Here's a great place to add any extra declarations that may be needed.
   // Write out meta data for each @protocol(<expr>).
-  for (llvm::SmallPtrSet<ObjCProtocolDecl *,8>::iterator I = ProtocolExprDecls.begin(),
-       E = ProtocolExprDecls.end(); I != E; ++I)
-    RewriteObjCProtocolMetaData(*I, "", "", Preamble);
+  for (ObjCProtocolDecl *ProtDecl : ProtocolExprDecls)
+    RewriteObjCProtocolMetaData(ProtDecl, "", "", Preamble);
 
   InsertText(SM->getLocForStartOfFile(MainFileID), Preamble, false);
   if (ClassImplementation.size() || CategoryImplementation.size())
@@ -5276,7 +5257,7 @@ void RewriteObjCFragileABI::RewriteObjCProtocolMetaData(
   Result += "};\n";
   
   // Mark this protocol as having been generated.
-  if (!ObjCSynthesizedProtocols.insert(PDecl->getCanonicalDecl()))
+  if (!ObjCSynthesizedProtocols.insert(PDecl->getCanonicalDecl()).second)
     llvm_unreachable("protocol already synthesized");
   
 }
@@ -5657,12 +5638,11 @@ void RewriteObjCFragileABI::RewriteMetaDataIntoBuffer(std::string &Result) {
     if (ProtocolExprDecls.size()) {
       Result += "#pragma section(\".objc_protocol$B\",long,read,write)\n";
       Result += "#pragma data_seg(push, \".objc_protocol$B\")\n";
-      for (llvm::SmallPtrSet<ObjCProtocolDecl *,8>::iterator I = ProtocolExprDecls.begin(),
-           E = ProtocolExprDecls.end(); I != E; ++I) {
+      for (ObjCProtocolDecl *ProtDecl : ProtocolExprDecls) {
         Result += "static struct _objc_protocol *_POINTER_OBJC_PROTOCOL_";
-        Result += (*I)->getNameAsString();
+        Result += ProtDecl->getNameAsString();
         Result += " = &_OBJC_PROTOCOL_";
-        Result += (*I)->getNameAsString();
+        Result += ProtDecl->getNameAsString();
         Result += ";\n";
       }
       Result += "#pragma data_seg(pop)\n\n";
diff --git a/contrib/llvm/tools/clang/lib/Frontend/SerializedDiagnosticPrinter.cpp b/contrib/llvm/tools/clang/lib/Frontend/SerializedDiagnosticPrinter.cpp
index 29c58a8..f701f72 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/SerializedDiagnosticPrinter.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/SerializedDiagnosticPrinter.cpp
@@ -14,6 +14,10 @@
 #include "clang/Basic/SourceManager.h"
 #include "clang/Basic/Version.h"
 #include "clang/Frontend/DiagnosticRenderer.h"
+#include "clang/Frontend/FrontendDiagnostic.h"
+#include "clang/Frontend/SerializedDiagnosticReader.h"
+#include "clang/Frontend/SerializedDiagnostics.h"
+#include "clang/Frontend/TextDiagnosticPrinter.h"
 #include "clang/Lex/Lexer.h"
 #include "llvm/ADT/DenseSet.h"
 #include "llvm/ADT/SmallString.h"
@@ -86,20 +90,70 @@ protected:
   void endDiagnostic(DiagOrStoredDiag D,
                      DiagnosticsEngine::Level Level) override;
 };
-  
+
+typedef llvm::DenseMap<unsigned, unsigned> AbbrevLookup;
+
+class SDiagsMerger : SerializedDiagnosticReader {
+  SDiagsWriter &Writer;
+  AbbrevLookup FileLookup;
+  AbbrevLookup CategoryLookup;
+  AbbrevLookup DiagFlagLookup;
+
+public:
+  SDiagsMerger(SDiagsWriter &Writer)
+      : SerializedDiagnosticReader(), Writer(Writer) {}
+
+  std::error_code mergeRecordsFromFile(const char *File) {
+    return readDiagnostics(File);
+  }
+
+protected:
+  std::error_code visitStartOfDiagnostic() override;
+  std::error_code visitEndOfDiagnostic() override;
+  std::error_code visitCategoryRecord(unsigned ID, StringRef Name) override;
+  std::error_code visitDiagFlagRecord(unsigned ID, StringRef Name) override;
+  std::error_code visitDiagnosticRecord(
+      unsigned Severity, const serialized_diags::Location &Location,
+      unsigned Category, unsigned Flag, StringRef Message) override;
+  std::error_code visitFilenameRecord(unsigned ID, unsigned Size,
+                                      unsigned Timestamp,
+                                      StringRef Name) override;
+  std::error_code visitFixitRecord(const serialized_diags::Location &Start,
+                                   const serialized_diags::Location &End,
+                                   StringRef CodeToInsert) override;
+  std::error_code
+  visitSourceRangeRecord(const serialized_diags::Location &Start,
+                         const serialized_diags::Location &End) override;
+
+private:
+  std::error_code adjustSourceLocFilename(RecordData &Record,
+                                          unsigned int offset);
+
+  void adjustAbbrevID(RecordData &Record, AbbrevLookup &Lookup,
+                      unsigned NewAbbrev);
+
+  void writeRecordWithAbbrev(unsigned ID, RecordData &Record);
+
+  void writeRecordWithBlob(unsigned ID, RecordData &Record, StringRef Blob);
+};
+
 class SDiagsWriter : public DiagnosticConsumer {
   friend class SDiagsRenderer;
+  friend class SDiagsMerger;
 
   struct SharedState;
 
   explicit SDiagsWriter(IntrusiveRefCntPtr<SharedState> State)
-    : LangOpts(nullptr), OriginalInstance(false), State(State) {}
+      : LangOpts(nullptr), OriginalInstance(false), MergeChildRecords(false),
+        State(State) {}
 
 public:
-  SDiagsWriter(raw_ostream *os, DiagnosticOptions *diags)
-    : LangOpts(nullptr), OriginalInstance(true),
-      State(new SharedState(os, diags))
-  {
+  SDiagsWriter(StringRef File, DiagnosticOptions *Diags, bool MergeChildRecords)
+      : LangOpts(nullptr), OriginalInstance(true),
+        MergeChildRecords(MergeChildRecords),
+        State(new SharedState(File, Diags)) {
+    if (MergeChildRecords)
+      RemoveOldDiagnostics();
     EmitPreamble();
   }
 
@@ -115,6 +169,14 @@ public:
   void finish() override;
 
 private:
+  /// \brief Build a DiagnosticsEngine to emit diagnostics about the diagnostics
+  DiagnosticsEngine *getMetaDiags();
+
+  /// \brief Remove old copies of the serialized diagnostics. This is necessary
+  /// so that we can detect when subprocesses write diagnostics that we should
+  /// merge into our own.
+  void RemoveOldDiagnostics();
+
   /// \brief Emit the preamble for the serialized diagnostics.
   void EmitPreamble();
   
@@ -152,7 +214,9 @@ private:
   /// \brief Emit the string information for diagnostic flags.
   unsigned getEmitDiagnosticFlag(DiagnosticsEngine::Level DiagLevel,
                                  unsigned DiagID = 0);
-  
+
+  unsigned getEmitDiagnosticFlag(StringRef DiagName);
+
   /// \brief Emit (lazily) the file string and retrieved the file identifier.
   unsigned getEmitFile(const char *Filename);
 
@@ -173,9 +237,6 @@ private:
   void AddCharSourceRangeToRecord(CharSourceRange R, RecordDataImpl &Record,
                                   const SourceManager &SM);
 
-  /// \brief The version of the diagnostics file.
-  enum { Version = 2 };
-
   /// \brief Language options, which can differ from one clone of this client
   /// to another.
   const LangOptions *LangOpts;
@@ -184,11 +245,16 @@ private:
   /// clones), responsible for writing the file at the end.
   bool OriginalInstance;
 
+  /// \brief Whether this instance should aggregate diagnostics that are
+  /// generated from child processes.
+  bool MergeChildRecords;
+
   /// \brief State that is shared among the various clones of this diagnostic
   /// consumer.
   struct SharedState : RefCountedBase<SharedState> {
-    SharedState(raw_ostream *os, DiagnosticOptions *diags)
-      : DiagOpts(diags), Stream(Buffer), OS(os), EmittedAnyDiagBlocks(false) { }
+    SharedState(StringRef File, DiagnosticOptions *Diags)
+        : DiagOpts(Diags), Stream(Buffer), OutputFile(File.str()),
+          EmittedAnyDiagBlocks(false) {}
 
     /// \brief Diagnostic options.
     IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts;
@@ -200,7 +266,7 @@ private:
     llvm::BitstreamWriter Stream;
 
     /// \brief The name of the diagnostics file.
-    std::unique_ptr<raw_ostream> OS;
+    std::string OutputFile;
 
     /// \brief The set of constructed record abbreviations.
     AbbreviationMap Abbrevs;
@@ -227,6 +293,9 @@ private:
     /// this becomes \c true, we never close a DIAG block until we know that we're
     /// starting another one or we're done.
     bool EmittedAnyDiagBlocks;
+
+    /// \brief Engine for emitting diagnostics about the diagnostics.
+    std::unique_ptr<DiagnosticsEngine> MetaDiagnostics;
   };
 
   /// \brief State shared among the various clones of this diagnostic consumer.
@@ -236,9 +305,11 @@ private:
 
 namespace clang {
 namespace serialized_diags {
-DiagnosticConsumer *create(raw_ostream *OS, DiagnosticOptions *diags) {
-  return new SDiagsWriter(OS, diags);
+std::unique_ptr<DiagnosticConsumer>
+create(StringRef OutputFile, DiagnosticOptions *Diags, bool MergeChildRecords) {
+  return llvm::make_unique<SDiagsWriter>(OutputFile, Diags, MergeChildRecords);
 }
+
 } // end namespace serialized_diags
 } // end namespace clang
 
@@ -465,17 +536,15 @@ void SDiagsWriter::EmitMetaBlock() {
   Stream.EnterSubblock(BLOCK_META, 3);
   Record.clear();
   Record.push_back(RECORD_VERSION);
-  Record.push_back(Version);
+  Record.push_back(VersionNumber);
   Stream.EmitRecordWithAbbrev(Abbrevs.get(RECORD_VERSION), Record);  
   Stream.ExitBlock();
 }
 
 unsigned SDiagsWriter::getEmitCategory(unsigned int category) {
-  if (State->Categories.count(category))
+  if (!State->Categories.insert(category).second)
     return category;
-  
-  State->Categories.insert(category);
-  
+
   // We use a local version of 'Record' so that we can be generating
   // another record when we lazily generate one for the category entry.
   RecordData Record;
@@ -495,6 +564,10 @@ unsigned SDiagsWriter::getEmitDiagnosticFlag(DiagnosticsEngine::Level DiagLevel,
     return 0; // No flag for notes.
   
   StringRef FlagName = DiagnosticIDs::getWarningOptionForDiag(DiagID);
+  return getEmitDiagnosticFlag(FlagName);
+}
+
+unsigned SDiagsWriter::getEmitDiagnosticFlag(StringRef FlagName) {
   if (FlagName.empty())
     return 0;
 
@@ -689,6 +762,40 @@ void SDiagsRenderer::emitNote(SourceLocation Loc, StringRef Message,
   Writer.ExitDiagBlock();
 }
 
+DiagnosticsEngine *SDiagsWriter::getMetaDiags() {
+  // FIXME: It's slightly absurd to create a new diagnostics engine here, but
+  // the other options that are available today are worse:
+  //
+  // 1. Teach DiagnosticsConsumers to emit diagnostics to the engine they are a
+  //    part of. The DiagnosticsEngine would need to know not to send
+  //    diagnostics back to the consumer that failed. This would require us to
+  //    rework ChainedDiagnosticsConsumer and teach the engine about multiple
+  //    consumers, which is difficult today because most APIs interface with
+  //    consumers rather than the engine itself.
+  //
+  // 2. Pass a DiagnosticsEngine to SDiagsWriter on creation - this would need
+  //    to be distinct from the engine the writer was being added to and would
+  //    normally not be used.
+  if (!State->MetaDiagnostics) {
+    IntrusiveRefCntPtr<DiagnosticIDs> IDs(new DiagnosticIDs());
+    auto Client =
+        new TextDiagnosticPrinter(llvm::errs(), State->DiagOpts.get());
+    State->MetaDiagnostics = llvm::make_unique<DiagnosticsEngine>(
+        IDs, State->DiagOpts.get(), Client);
+  }
+  return State->MetaDiagnostics.get();
+}
+
+void SDiagsWriter::RemoveOldDiagnostics() {
+  if (!llvm::sys::fs::remove(State->OutputFile))
+    return;
+
+  getMetaDiags()->Report(diag::warn_fe_serialized_diag_merge_failure);
+  // Disable merging child records, as whatever is in this file may be
+  // misleading.
+  MergeChildRecords = false;
+}
+
 void SDiagsWriter::finish() {
   // The original instance is responsible for writing the file.
   if (!OriginalInstance)
@@ -698,9 +805,113 @@ void SDiagsWriter::finish() {
   if (State->EmittedAnyDiagBlocks)
     ExitDiagBlock();
 
+  if (MergeChildRecords) {
+    if (!State->EmittedAnyDiagBlocks)
+      // We have no diagnostics of our own, so we can just leave the child
+      // process' output alone
+      return;
+
+    if (llvm::sys::fs::exists(State->OutputFile))
+      if (SDiagsMerger(*this).mergeRecordsFromFile(State->OutputFile.c_str()))
+        getMetaDiags()->Report(diag::warn_fe_serialized_diag_merge_failure);
+  }
+
+  std::error_code EC;
+  auto OS = llvm::make_unique<llvm::raw_fd_ostream>(State->OutputFile.c_str(),
+                                                    EC, llvm::sys::fs::F_None);
+  if (EC) {
+    getMetaDiags()->Report(diag::warn_fe_serialized_diag_failure)
+        << State->OutputFile << EC.message();
+    return;
+  }
+
   // Write the generated bitstream to "Out".
-  State->OS->write((char *)&State->Buffer.front(), State->Buffer.size());
-  State->OS->flush();
+  OS->write((char *)&State->Buffer.front(), State->Buffer.size());
+  OS->flush();
+}
+
+std::error_code SDiagsMerger::visitStartOfDiagnostic() {
+  Writer.EnterDiagBlock();
+  return std::error_code();
+}
+
+std::error_code SDiagsMerger::visitEndOfDiagnostic() {
+  Writer.ExitDiagBlock();
+  return std::error_code();
+}
+
+std::error_code
+SDiagsMerger::visitSourceRangeRecord(const serialized_diags::Location &Start,
+                                     const serialized_diags::Location &End) {
+  RecordData Record;
+  Record.push_back(RECORD_SOURCE_RANGE);
+  Record.push_back(FileLookup[Start.FileID]);
+  Record.push_back(Start.Line);
+  Record.push_back(Start.Col);
+  Record.push_back(Start.Offset);
+  Record.push_back(FileLookup[End.FileID]);
+  Record.push_back(End.Line);
+  Record.push_back(End.Col);
+  Record.push_back(End.Offset);
+
+  Writer.State->Stream.EmitRecordWithAbbrev(
+      Writer.State->Abbrevs.get(RECORD_SOURCE_RANGE), Record);
+  return std::error_code();
+}
+
+std::error_code SDiagsMerger::visitDiagnosticRecord(
+    unsigned Severity, const serialized_diags::Location &Location,
+    unsigned Category, unsigned Flag, StringRef Message) {
+  RecordData MergedRecord;
+  MergedRecord.push_back(RECORD_DIAG);
+  MergedRecord.push_back(Severity);
+  MergedRecord.push_back(FileLookup[Location.FileID]);
+  MergedRecord.push_back(Location.Line);
+  MergedRecord.push_back(Location.Col);
+  MergedRecord.push_back(Location.Offset);
+  MergedRecord.push_back(CategoryLookup[Category]);
+  MergedRecord.push_back(Flag ? DiagFlagLookup[Flag] : 0);
+  MergedRecord.push_back(Message.size());
+
+  Writer.State->Stream.EmitRecordWithBlob(
+      Writer.State->Abbrevs.get(RECORD_DIAG), MergedRecord, Message);
+  return std::error_code();
+}
+
+std::error_code
+SDiagsMerger::visitFixitRecord(const serialized_diags::Location &Start,
+                               const serialized_diags::Location &End,
+                               StringRef Text) {
+  RecordData Record;
+  Record.push_back(RECORD_FIXIT);
+  Record.push_back(FileLookup[Start.FileID]);
+  Record.push_back(Start.Line);
+  Record.push_back(Start.Col);
+  Record.push_back(Start.Offset);
+  Record.push_back(FileLookup[End.FileID]);
+  Record.push_back(End.Line);
+  Record.push_back(End.Col);
+  Record.push_back(End.Offset);
+  Record.push_back(Text.size());
+
+  Writer.State->Stream.EmitRecordWithBlob(
+      Writer.State->Abbrevs.get(RECORD_FIXIT), Record, Text);
+  return std::error_code();
+}
+
+std::error_code SDiagsMerger::visitFilenameRecord(unsigned ID, unsigned Size,
+                                                  unsigned Timestamp,
+                                                  StringRef Name) {
+  FileLookup[ID] = Writer.getEmitFile(Name.str().c_str());
+  return std::error_code();
+}
+
+std::error_code SDiagsMerger::visitCategoryRecord(unsigned ID, StringRef Name) {
+  CategoryLookup[ID] = Writer.getEmitCategory(ID);
+  return std::error_code();
+}
 
-  State->OS.reset();
+std::error_code SDiagsMerger::visitDiagFlagRecord(unsigned ID, StringRef Name) {
+  DiagFlagLookup[ID] = Writer.getEmitDiagnosticFlag(Name);
+  return std::error_code();
 }
diff --git a/contrib/llvm/tools/clang/lib/Frontend/SerializedDiagnosticReader.cpp b/contrib/llvm/tools/clang/lib/Frontend/SerializedDiagnosticReader.cpp
new file mode 100644
index 0000000..0ebbd22
--- /dev/null
+++ b/contrib/llvm/tools/clang/lib/Frontend/SerializedDiagnosticReader.cpp
@@ -0,0 +1,295 @@
+//===--- SerializedDiagnosticReader.cpp - Reads diagnostics ---------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Frontend/SerializedDiagnosticReader.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Frontend/SerializedDiagnostics.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
+
+using namespace clang;
+using namespace clang::serialized_diags;
+
+std::error_code SerializedDiagnosticReader::readDiagnostics(StringRef File) {
+  // Open the diagnostics file.
+  FileSystemOptions FO;
+  FileManager FileMgr(FO);
+
+  auto Buffer = FileMgr.getBufferForFile(File);
+  if (!Buffer)
+    return SDError::CouldNotLoad;
+
+  llvm::BitstreamReader StreamFile;
+  StreamFile.init((const unsigned char *)(*Buffer)->getBufferStart(),
+                  (const unsigned char *)(*Buffer)->getBufferEnd());
+
+  llvm::BitstreamCursor Stream(StreamFile);
+
+  // Sniff for the signature.
+  if (Stream.Read(8) != 'D' ||
+      Stream.Read(8) != 'I' ||
+      Stream.Read(8) != 'A' ||
+      Stream.Read(8) != 'G')
+    return SDError::InvalidSignature;
+
+  // Read the top level blocks.
+  while (!Stream.AtEndOfStream()) {
+    if (Stream.ReadCode() != llvm::bitc::ENTER_SUBBLOCK)
+      return SDError::InvalidDiagnostics;
+
+    std::error_code EC;
+    switch (Stream.ReadSubBlockID()) {
+    case llvm::bitc::BLOCKINFO_BLOCK_ID:
+      if (Stream.ReadBlockInfoBlock())
+        return SDError::MalformedBlockInfoBlock;
+      continue;
+    case BLOCK_META:
+      if ((EC = readMetaBlock(Stream)))
+        return EC;
+      continue;
+    case BLOCK_DIAG:
+      if ((EC = readDiagnosticBlock(Stream)))
+        return EC;
+      continue;
+    default:
+      if (!Stream.SkipBlock())
+        return SDError::MalformedTopLevelBlock;
+      continue;
+    }
+  }
+  return std::error_code();
+}
+
+enum class SerializedDiagnosticReader::Cursor {
+  Record = 1,
+  BlockEnd,
+  BlockBegin
+};
+
+llvm::ErrorOr<SerializedDiagnosticReader::Cursor>
+SerializedDiagnosticReader::skipUntilRecordOrBlock(
+    llvm::BitstreamCursor &Stream, unsigned &BlockOrRecordID) {
+  BlockOrRecordID = 0;
+
+  while (!Stream.AtEndOfStream()) {
+    unsigned Code = Stream.ReadCode();
+
+    switch ((llvm::bitc::FixedAbbrevIDs)Code) {
+    case llvm::bitc::ENTER_SUBBLOCK:
+      BlockOrRecordID = Stream.ReadSubBlockID();
+      return Cursor::BlockBegin;
+
+    case llvm::bitc::END_BLOCK:
+      if (Stream.ReadBlockEnd())
+        return SDError::InvalidDiagnostics;
+      return Cursor::BlockEnd;
+
+    case llvm::bitc::DEFINE_ABBREV:
+      Stream.ReadAbbrevRecord();
+      continue;
+
+    case llvm::bitc::UNABBREV_RECORD:
+      return SDError::UnsupportedConstruct;
+
+    default:
+      // We found a record.
+      BlockOrRecordID = Code;
+      return Cursor::Record;
+    }
+  }
+
+  return SDError::InvalidDiagnostics;
+}
+
+std::error_code
+SerializedDiagnosticReader::readMetaBlock(llvm::BitstreamCursor &Stream) {
+  if (Stream.EnterSubBlock(clang::serialized_diags::BLOCK_META))
+    return SDError::MalformedMetadataBlock;
+
+  bool VersionChecked = false;
+
+  while (true) {
+    unsigned BlockOrCode = 0;
+    llvm::ErrorOr<Cursor> Res = skipUntilRecordOrBlock(Stream, BlockOrCode);
+    if (!Res)
+      Res.getError();
+
+    switch (Res.get()) {
+    case Cursor::Record:
+      break;
+    case Cursor::BlockBegin:
+      if (Stream.SkipBlock())
+        return SDError::MalformedMetadataBlock;
+    case Cursor::BlockEnd:
+      if (!VersionChecked)
+        return SDError::MissingVersion;
+      return std::error_code();
+    }
+
+    SmallVector<uint64_t, 1> Record;
+    unsigned RecordID = Stream.readRecord(BlockOrCode, Record);
+
+    if (RecordID == RECORD_VERSION) {
+      if (Record.size() < 1)
+        return SDError::MissingVersion;
+      if (Record[0] > VersionNumber)
+        return SDError::VersionMismatch;
+      VersionChecked = true;
+    }
+  }
+}
+
+std::error_code
+SerializedDiagnosticReader::readDiagnosticBlock(llvm::BitstreamCursor &Stream) {
+  if (Stream.EnterSubBlock(clang::serialized_diags::BLOCK_DIAG))
+    return SDError::MalformedDiagnosticBlock;
+
+  std::error_code EC;
+  if ((EC = visitStartOfDiagnostic()))
+    return EC;
+
+  SmallVector<uint64_t, 16> Record;
+  while (true) {
+    unsigned BlockOrCode = 0;
+    llvm::ErrorOr<Cursor> Res = skipUntilRecordOrBlock(Stream, BlockOrCode);
+    if (!Res)
+      Res.getError();
+
+    switch (Res.get()) {
+    case Cursor::BlockBegin:
+      // The only blocks we care about are subdiagnostics.
+      if (BlockOrCode == serialized_diags::BLOCK_DIAG) {
+        if ((EC = readDiagnosticBlock(Stream)))
+          return EC;
+      } else if (!Stream.SkipBlock())
+        return SDError::MalformedSubBlock;
+      continue;
+    case Cursor::BlockEnd:
+      if ((EC = visitEndOfDiagnostic()))
+        return EC;
+      return std::error_code();
+    case Cursor::Record:
+      break;
+    }
+
+    // Read the record.
+    Record.clear();
+    StringRef Blob;
+    unsigned RecID = Stream.readRecord(BlockOrCode, Record, &Blob);
+
+    if (RecID < serialized_diags::RECORD_FIRST ||
+        RecID > serialized_diags::RECORD_LAST)
+      continue;
+
+    switch ((RecordIDs)RecID) {
+    case RECORD_CATEGORY:
+      // A category has ID and name size.
+      if (Record.size() != 2)
+        return SDError::MalformedDiagnosticRecord;
+      if ((EC = visitCategoryRecord(Record[0], Blob)))
+        return EC;
+      continue;
+    case RECORD_DIAG:
+      // A diagnostic has severity, location (4), category, flag, and message
+      // size.
+      if (Record.size() != 8)
+        return SDError::MalformedDiagnosticRecord;
+      if ((EC = visitDiagnosticRecord(
+               Record[0], Location(Record[1], Record[2], Record[3], Record[4]),
+               Record[5], Record[6], Blob)))
+        return EC;
+      continue;
+    case RECORD_DIAG_FLAG:
+      // A diagnostic flag has ID and name size.
+      if (Record.size() != 2)
+        return SDError::MalformedDiagnosticRecord;
+      if ((EC = visitDiagFlagRecord(Record[0], Blob)))
+        return EC;
+      continue;
+    case RECORD_FILENAME:
+      // A filename has ID, size, timestamp, and name size. The size and
+      // timestamp are legacy fields that are always zero these days.
+      if (Record.size() != 4)
+        return SDError::MalformedDiagnosticRecord;
+      if ((EC = visitFilenameRecord(Record[0], Record[1], Record[2], Blob)))
+        return EC;
+      continue;
+    case RECORD_FIXIT:
+      // A fixit has two locations (4 each) and message size.
+      if (Record.size() != 9)
+        return SDError::MalformedDiagnosticRecord;
+      if ((EC = visitFixitRecord(
+               Location(Record[0], Record[1], Record[2], Record[3]),
+               Location(Record[4], Record[5], Record[6], Record[7]), Blob)))
+        return EC;
+      continue;
+    case RECORD_SOURCE_RANGE:
+      // A source range is two locations (4 each).
+      if (Record.size() != 8)
+        return SDError::MalformedDiagnosticRecord;
+      if ((EC = visitSourceRangeRecord(
+               Location(Record[0], Record[1], Record[2], Record[3]),
+               Location(Record[4], Record[5], Record[6], Record[7]))))
+        return EC;
+      continue;
+    case RECORD_VERSION:
+      // A version is just a number.
+      if (Record.size() != 1)
+        return SDError::MalformedDiagnosticRecord;
+      if ((EC = visitVersionRecord(Record[0])))
+        return EC;
+      continue;
+    }
+  }
+}
+
+namespace {
+class SDErrorCategoryType final : public std::error_category {
+  const char *name() const LLVM_NOEXCEPT override {
+    return "clang.serialized_diags";
+  }
+  std::string message(int IE) const override {
+    SDError E = static_cast<SDError>(IE);
+    switch (E) {
+    case SDError::CouldNotLoad:
+      return "Failed to open diagnostics file";
+    case SDError::InvalidSignature:
+      return "Invalid diagnostics signature";
+    case SDError::InvalidDiagnostics:
+      return "Parse error reading diagnostics";
+    case SDError::MalformedTopLevelBlock:
+      return "Malformed block at top-level of diagnostics";
+    case SDError::MalformedSubBlock:
+      return "Malformed sub-block in a diagnostic";
+    case SDError::MalformedBlockInfoBlock:
+      return "Malformed BlockInfo block";
+    case SDError::MalformedMetadataBlock:
+      return "Malformed Metadata block";
+    case SDError::MalformedDiagnosticBlock:
+      return "Malformed Diagnostic block";
+    case SDError::MalformedDiagnosticRecord:
+      return "Malformed Diagnostic record";
+    case SDError::MissingVersion:
+      return "No version provided in diagnostics";
+    case SDError::VersionMismatch:
+      return "Unsupported diagnostics version";
+    case SDError::UnsupportedConstruct:
+      return "Bitcode constructs that are not supported in diagnostics appear";
+    case SDError::HandlerFailed:
+      return "Generic error occurred while handling a record";
+    }
+    llvm_unreachable("Unknown error type!");
+  }
+};
+}
+
+static llvm::ManagedStatic<SDErrorCategoryType> ErrorCategory;
+const std::error_category &clang::serialized_diags::SDErrorCategory() {
+  return *ErrorCategory;
+}
diff --git a/contrib/llvm/tools/clang/lib/Frontend/TextDiagnostic.cpp b/contrib/llvm/tools/clang/lib/Frontend/TextDiagnostic.cpp
index 6e6f3dd..bbc9914 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/TextDiagnostic.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/TextDiagnostic.cpp
@@ -176,7 +176,7 @@ static void expandTabs(std::string &SourceLine, unsigned TabStop) {
 ///  of the printable representation of the line to the columns those printable
 ///  characters will appear at (numbering the first column as 0).
 ///
-/// If a byte 'i' corresponds to muliple columns (e.g. the byte contains a tab
+/// If a byte 'i' corresponds to multiple columns (e.g. the byte contains a tab
 ///  character) then the array will map that byte to the first column the
 ///  tab appears at and the next value in the map will have been incremented
 ///  more than once.
@@ -293,14 +293,14 @@ struct SourceColumnMap {
 
   /// \brief Map from a byte index to the next byte which starts a column.
   int startOfNextColumn(int N) const {
-    assert(0 <= N && N < static_cast<int>(m_columnToByte.size() - 1));
+    assert(0 <= N && N < static_cast<int>(m_byteToColumn.size() - 1));
     while (byteToColumn(++N) == -1) {}
     return N;
   }
 
   /// \brief Map from a byte index to the previous byte which starts a column.
   int startOfPreviousColumn(int N) const {
-    assert(0 < N && N < static_cast<int>(m_columnToByte.size()));
+    assert(0 < N && N < static_cast<int>(m_byteToColumn.size()));
     while (byteToColumn(--N) == -1) {}
     return N;
   }
@@ -323,9 +323,10 @@ static void selectInterestingSourceRegion(std::string &SourceLine,
                                           std::string &FixItInsertionLine,
                                           unsigned Columns,
                                           const SourceColumnMap &map) {
-  unsigned MaxColumns = std::max<unsigned>(map.columns(),
-                                           std::max(CaretLine.size(),
-                                                    FixItInsertionLine.size()));
+  unsigned CaretColumns = CaretLine.size();
+  unsigned FixItColumns = llvm::sys::locale::columnWidth(FixItInsertionLine);
+  unsigned MaxColumns = std::max(static_cast<unsigned>(map.columns()),
+                                 std::max(CaretColumns, FixItColumns));
   // if the number of columns is less than the desired number we're done
   if (MaxColumns <= Columns)
     return;
@@ -487,7 +488,7 @@ static void selectInterestingSourceRegion(std::string &SourceLine,
   // We checked up front that the line needed truncation
   assert(FrontColumnsRemoved+ColumnsKept+BackColumnsRemoved > Columns);
 
-  // The line needs some trunctiona, and we'd prefer to keep the front
+  // The line needs some truncation, and we'd prefer to keep the front
   //  if possible, so remove the back
   if (BackColumnsRemoved > strlen(back_ellipse))
     SourceLine.replace(SourceEnd, std::string::npos, back_ellipse);
@@ -1110,12 +1111,13 @@ void TextDiagnostic::emitSnippetAndCaret(
   // Copy the line of code into an std::string for ease of manipulation.
   std::string SourceLine(LineStart, LineEnd);
 
-  // Create a line for the caret that is filled with spaces that is the same
-  // length as the line of source code.
-  std::string CaretLine(LineEnd-LineStart, ' ');
-
+  // Build the byte to column map.
   const SourceColumnMap sourceColMap(SourceLine, DiagOpts->TabStop);
 
+  // Create a line for the caret that is filled with spaces that is the same
+  // number of columns as the line of source code.
+  std::string CaretLine(sourceColMap.columns(), ' ');
+
   // Highlight all of the characters covered by Ranges with ~ characters.
   for (SmallVectorImpl<CharSourceRange>::iterator I = Ranges.begin(),
                                                   E = Ranges.end();
diff --git a/contrib/llvm/tools/clang/lib/Frontend/VerifyDiagnosticConsumer.cpp b/contrib/llvm/tools/clang/lib/Frontend/VerifyDiagnosticConsumer.cpp
index b50950e..3ff6b18 100644
--- a/contrib/llvm/tools/clang/lib/Frontend/VerifyDiagnosticConsumer.cpp
+++ b/contrib/llvm/tools/clang/lib/Frontend/VerifyDiagnosticConsumer.cpp
@@ -27,14 +27,13 @@ typedef VerifyDiagnosticConsumer::Directive Directive;
 typedef VerifyDiagnosticConsumer::DirectiveList DirectiveList;
 typedef VerifyDiagnosticConsumer::ExpectedData ExpectedData;
 
-VerifyDiagnosticConsumer::VerifyDiagnosticConsumer(DiagnosticsEngine &_Diags)
-  : Diags(_Diags),
-    PrimaryClient(Diags.getClient()), OwnsPrimaryClient(Diags.ownsClient()),
+VerifyDiagnosticConsumer::VerifyDiagnosticConsumer(DiagnosticsEngine &Diags_)
+  : Diags(Diags_),
+    PrimaryClient(Diags.getClient()), PrimaryClientOwner(Diags.takeClient()),
     Buffer(new TextDiagnosticBuffer()), CurrentPreprocessor(nullptr),
     LangOpts(nullptr), SrcManager(nullptr), ActiveSourceFiles(0),
     Status(HasNoDirectives)
 {
-  Diags.takeClient();
   if (Diags.hasSourceManager())
     setSourceManager(Diags.getSourceManager());
 }
@@ -43,10 +42,8 @@ VerifyDiagnosticConsumer::~VerifyDiagnosticConsumer() {
   assert(!ActiveSourceFiles && "Incomplete parsing of source files!");
   assert(!CurrentPreprocessor && "CurrentPreprocessor should be invalid!");
   SrcManager = nullptr;
-  CheckDiagnostics();  
-  Diags.takeClient();
-  if (OwnsPrimaryClient)
-    delete PrimaryClient;
+  CheckDiagnostics();
+  Diags.takeClient().release();
 }
 
 #ifndef NDEBUG
@@ -84,8 +81,8 @@ void VerifyDiagnosticConsumer::BeginSourceFile(const LangOptions &LangOpts,
       const_cast<Preprocessor*>(PP)->addCommentHandler(this);
 #ifndef NDEBUG
       // Debug build tracks parsed files.
-      VerifyFileTracker *V = new VerifyFileTracker(*this, *SrcManager);
-      const_cast<Preprocessor*>(PP)->addPPCallbacks(V);
+      const_cast<Preprocessor*>(PP)->addPPCallbacks(
+                      llvm::make_unique<VerifyFileTracker>(*this, *SrcManager));
 #endif
     }
   }
@@ -402,8 +399,9 @@ static bool ParseDirective(StringRef S, ExpectedData *ED, SourceManager &SM,
 
         // Lookup file via Preprocessor, like a #include.
         const DirectoryLookup *CurDir;
-        const FileEntry *FE = PP->LookupFile(Pos, Filename, false, nullptr,
-                                             CurDir, nullptr, nullptr, nullptr);
+        const FileEntry *FE =
+            PP->LookupFile(Pos, Filename, false, nullptr, nullptr, CurDir,
+                           nullptr, nullptr, nullptr);
         if (!FE) {
           Diags.Report(Pos.getLocWithOffset(PH.C-PH.Begin),
                        diag::err_verify_missing_file) << Filename << KindStr;
@@ -502,13 +500,12 @@ static bool ParseDirective(StringRef S, ExpectedData *ED, SourceManager &SM,
     }
 
     // Construct new directive.
-    std::unique_ptr<Directive> D(
-        Directive::create(RegexKind, Pos, ExpectedLoc, MatchAnyLine, Text,
-                          Min, Max));
+    std::unique_ptr<Directive> D = Directive::create(
+        RegexKind, Pos, ExpectedLoc, MatchAnyLine, Text, Min, Max);
 
     std::string Error;
     if (D->isValid(Error)) {
-      DL->push_back(D.release());
+      DL->push_back(std::move(D));
       FoundDirective = true;
     } else {
       Diags.Report(Pos.getLocWithOffset(ContentBegin-PH.Begin),
@@ -644,15 +641,16 @@ static unsigned PrintUnexpected(DiagnosticsEngine &Diags, SourceManager *SourceM
 
 /// \brief Takes a list of diagnostics that were expected to have been generated
 /// but were not and produces a diagnostic to the user from this.
-static unsigned PrintExpected(DiagnosticsEngine &Diags, SourceManager &SourceMgr,
-                              DirectiveList &DL, const char *Kind) {
+static unsigned PrintExpected(DiagnosticsEngine &Diags,
+                              SourceManager &SourceMgr,
+                              std::vector<Directive *> &DL, const char *Kind) {
   if (DL.empty())
     return 0;
 
   SmallString<256> Fmt;
   llvm::raw_svector_ostream OS(Fmt);
-  for (DirectiveList::iterator I = DL.begin(), E = DL.end(); I != E; ++I) {
-    Directive &D = **I;
+  for (auto *DirPtr : DL) {
+    Directive &D = *DirPtr;
     OS << "\n  File " << SourceMgr.getFilename(D.DiagnosticLoc);
     if (D.MatchAnyLine)
       OS << " Line *";
@@ -694,11 +692,11 @@ static unsigned CheckLists(DiagnosticsEngine &Diags, SourceManager &SourceMgr,
                            DirectiveList &Left,
                            const_diag_iterator d2_begin,
                            const_diag_iterator d2_end) {
-  DirectiveList LeftOnly;
+  std::vector<Directive *> LeftOnly;
   DiagList Right(d2_begin, d2_end);
 
-  for (DirectiveList::iterator I = Left.begin(), E = Left.end(); I != E; ++I) {
-    Directive& D = **I;
+  for (auto &Owner : Left) {
+    Directive &D = *Owner;
     unsigned LineNo1 = SourceMgr.getPresumedLineNumber(D.DiagnosticLoc);
 
     for (unsigned i = 0; i < D.Max; ++i) {
@@ -720,7 +718,7 @@ static unsigned CheckLists(DiagnosticsEngine &Diags, SourceManager &SourceMgr,
       if (II == IE) {
         // Not found.
         if (i >= D.Min) break;
-        LeftOnly.push_back(*I);
+        LeftOnly.push_back(&D);
       } else {
         // Found. The same cannot be found twice.
         Right.erase(II);
@@ -801,8 +799,8 @@ void VerifyDiagnosticConsumer::UpdateParsedFileStatus(SourceManager &SM,
 
 void VerifyDiagnosticConsumer::CheckDiagnostics() {
   // Ensure any diagnostics go to the primary client.
-  bool OwnsCurClient = Diags.ownsClient();
-  DiagnosticConsumer *CurClient = Diags.takeClient();
+  DiagnosticConsumer *CurClient = Diags.getClient();
+  std::unique_ptr<DiagnosticConsumer> Owner = Diags.takeClient();
   Diags.setClient(PrimaryClient, false);
 
 #ifndef NDEBUG
@@ -864,20 +862,21 @@ void VerifyDiagnosticConsumer::CheckDiagnostics() {
                                   Buffer->note_end(), "note"));
   }
 
-  Diags.takeClient();
-  Diags.setClient(CurClient, OwnsCurClient);
+  Diags.setClient(CurClient, Owner.release() != nullptr);
 
   // Reset the buffer, we have processed all the diagnostics in it.
   Buffer.reset(new TextDiagnosticBuffer());
   ED.Reset();
 }
 
-Directive *Directive::create(bool RegexKind, SourceLocation DirectiveLoc,
-                             SourceLocation DiagnosticLoc, bool MatchAnyLine,
-                             StringRef Text, unsigned Min, unsigned Max) {
+std::unique_ptr<Directive> Directive::create(bool RegexKind,
+                                             SourceLocation DirectiveLoc,
+                                             SourceLocation DiagnosticLoc,
+                                             bool MatchAnyLine, StringRef Text,
+                                             unsigned Min, unsigned Max) {
   if (!RegexKind)
-    return new StandardDirective(DirectiveLoc, DiagnosticLoc, MatchAnyLine,
-                                 Text, Min, Max);
+    return llvm::make_unique<StandardDirective>(DirectiveLoc, DiagnosticLoc,
+                                                MatchAnyLine, Text, Min, Max);
 
   // Parse the directive into a regular expression.
   std::string RegexStr;
@@ -902,6 +901,6 @@ Directive *Directive::create(bool RegexKind, SourceLocation DirectiveLoc,
     }
   }
 
-  return new RegexDirective(DirectiveLoc, DiagnosticLoc, MatchAnyLine, Text,
-                            Min, Max, RegexStr);
+  return llvm::make_unique<RegexDirective>(
+      DirectiveLoc, DiagnosticLoc, MatchAnyLine, Text, Min, Max, RegexStr);
 }