Update llvm/clang to trunk r126547.

There are several bugfixes in this update, but the most important one is
to ensure __start_ and __stop_ symbols for linker sets and kernel module
metadata are always emitted in object files:

  http://llvm.org/bugs/show_bug.cgi?id=9292

Before this fix, if you compiled kernel modules with clang, they would
not be properly processed by kldxref, and if they had any dependencies,
the kernel would fail to load those.  Another problem occurred when
attempting to mount a tmpfs filesystem, which would result in 'operation
not supported by device'.

1 files changed, 73 insertions, 85 deletions

diff --git a/contrib/llvm/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp b/contrib/llvm/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
index c0150c0..3a40b6f 100644
--- a/contrib/llvm/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/contrib/llvm/tools/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -27,33 +27,33 @@ using namespace clang;
 
 bool TemplateDeclInstantiator::SubstQualifier(const DeclaratorDecl *OldDecl,
                                               DeclaratorDecl *NewDecl) {
-  NestedNameSpecifier *OldQual = OldDecl->getQualifier();
-  if (!OldQual) return false;
-
-  SourceRange QualRange = OldDecl->getQualifierRange();
-
-  NestedNameSpecifier *NewQual
-    = SemaRef.SubstNestedNameSpecifier(OldQual, QualRange, TemplateArgs);
-  if (!NewQual)
+  if (!OldDecl->getQualifierLoc())
+    return false;
+  
+  NestedNameSpecifierLoc NewQualifierLoc
+    = SemaRef.SubstNestedNameSpecifierLoc(OldDecl->getQualifierLoc(), 
+                                          TemplateArgs);
+  
+  if (!NewQualifierLoc)
     return true;
-
-  NewDecl->setQualifierInfo(NewQual, QualRange);
+  
+  NewDecl->setQualifierInfo(NewQualifierLoc);
   return false;
 }
 
 bool TemplateDeclInstantiator::SubstQualifier(const TagDecl *OldDecl,
                                               TagDecl *NewDecl) {
-  NestedNameSpecifier *OldQual = OldDecl->getQualifier();
-  if (!OldQual) return false;
-
-  SourceRange QualRange = OldDecl->getQualifierRange();
-
-  NestedNameSpecifier *NewQual
-    = SemaRef.SubstNestedNameSpecifier(OldQual, QualRange, TemplateArgs);
-  if (!NewQual)
+  if (!OldDecl->getQualifierLoc())
+    return false;
+  
+  NestedNameSpecifierLoc NewQualifierLoc
+  = SemaRef.SubstNestedNameSpecifierLoc(OldDecl->getQualifierLoc(), 
+                                        TemplateArgs);
+  
+  if (!NewQualifierLoc)
     return true;
-
-  NewDecl->setQualifierInfo(NewQual, QualRange);
+  
+  NewDecl->setQualifierInfo(NewQualifierLoc);
   return false;
 }
 
@@ -120,9 +120,8 @@ TemplateDeclInstantiator::VisitNamespaceAliasDecl(NamespaceAliasDecl *D) {
     = NamespaceAliasDecl::Create(SemaRef.Context, Owner,
                                  D->getNamespaceLoc(),
                                  D->getAliasLoc(),
-                                 D->getNamespace()->getIdentifier(),
-                                 D->getQualifierRange(),
-                                 D->getQualifier(),
+                                 D->getIdentifier(),
+                                 D->getQualifierLoc(),
                                  D->getTargetNameLoc(),
                                  D->getNamespace());
   Owner->addDecl(Inst);
@@ -642,12 +641,12 @@ Decl *TemplateDeclInstantiator::VisitClassTemplateDecl(ClassTemplateDecl *D) {
   // Instantiate the qualifier.  We have to do this first in case
   // we're a friend declaration, because if we are then we need to put
   // the new declaration in the appropriate context.
-  NestedNameSpecifier *Qualifier = Pattern->getQualifier();
-  if (Qualifier) {
-    Qualifier = SemaRef.SubstNestedNameSpecifier(Qualifier,
-                                                 Pattern->getQualifierRange(),
-                                                 TemplateArgs);
-    if (!Qualifier) return 0;
+  NestedNameSpecifierLoc QualifierLoc = Pattern->getQualifierLoc();
+  if (QualifierLoc) {
+    QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc,
+                                                       TemplateArgs);
+    if (!QualifierLoc)
+      return 0;
   }
 
   CXXRecordDecl *PrevDecl = 0;
@@ -668,10 +667,9 @@ Decl *TemplateDeclInstantiator::VisitClassTemplateDecl(ClassTemplateDecl *D) {
   // the appropriate context.
   DeclContext *DC = Owner;
   if (isFriend) {
-    if (Qualifier) {
+    if (QualifierLoc) {
       CXXScopeSpec SS;
-      SS.setScopeRep(Qualifier);
-      SS.setRange(Pattern->getQualifierRange());
+      SS.Adopt(QualifierLoc);
       DC = SemaRef.computeDeclContext(SS);
       if (!DC) return 0;
     } else {
@@ -692,10 +690,10 @@ Decl *TemplateDeclInstantiator::VisitClassTemplateDecl(ClassTemplateDecl *D) {
         PrevDecl = PrevClassTemplate->getTemplatedDecl();
     }
 
-    if (!PrevClassTemplate && Qualifier) {
+    if (!PrevClassTemplate && QualifierLoc) {
       SemaRef.Diag(Pattern->getLocation(), diag::err_not_tag_in_scope)
         << D->getTemplatedDecl()->getTagKind() << Pattern->getDeclName() << DC
-        << Pattern->getQualifierRange();
+        << QualifierLoc.getSourceRange();
       return 0;
     }
 
@@ -756,8 +754,8 @@ Decl *TemplateDeclInstantiator::VisitClassTemplateDecl(ClassTemplateDecl *D) {
                             Pattern->getTagKeywordLoc(), PrevDecl,
                             /*DelayTypeCreation=*/true);
 
-  if (Qualifier)
-    RecordInst->setQualifierInfo(Qualifier, Pattern->getQualifierRange());
+  if (QualifierLoc)
+    RecordInst->setQualifierInfo(QualifierLoc);
 
   ClassTemplateDecl *Inst
     = ClassTemplateDecl::Create(SemaRef.Context, DC, D->getLocation(),
@@ -969,12 +967,12 @@ Decl *TemplateDeclInstantiator::VisitFunctionDecl(FunctionDecl *D,
     return 0;
   QualType T = TInfo->getType();
 
-  NestedNameSpecifier *Qualifier = D->getQualifier();
-  if (Qualifier) {
-    Qualifier = SemaRef.SubstNestedNameSpecifier(Qualifier,
-                                                 D->getQualifierRange(),
-                                                 TemplateArgs);
-    if (!Qualifier) return 0;
+  NestedNameSpecifierLoc QualifierLoc = D->getQualifierLoc();
+  if (QualifierLoc) {
+    QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc,
+                                                       TemplateArgs);
+    if (!QualifierLoc)
+      return 0;
   }
 
   // If we're instantiating a local function declaration, put the result
@@ -982,10 +980,9 @@ Decl *TemplateDeclInstantiator::VisitFunctionDecl(FunctionDecl *D,
   DeclContext *DC;
   if (D->getDeclContext()->isFunctionOrMethod())
     DC = Owner;
-  else if (isFriend && Qualifier) {
+  else if (isFriend && QualifierLoc) {
     CXXScopeSpec SS;
-    SS.setScopeRep(Qualifier);
-    SS.setRange(D->getQualifierRange());
+    SS.Adopt(QualifierLoc);
     DC = SemaRef.computeDeclContext(SS);
     if (!DC) return 0;
   } else {
@@ -999,8 +996,8 @@ Decl *TemplateDeclInstantiator::VisitFunctionDecl(FunctionDecl *D,
                            D->getStorageClass(), D->getStorageClassAsWritten(),
                            D->isInlineSpecified(), D->hasWrittenPrototype());
 
-  if (Qualifier)
-    Function->setQualifierInfo(Qualifier, D->getQualifierRange());
+  if (QualifierLoc)
+    Function->setQualifierInfo(QualifierLoc);
 
   DeclContext *LexicalDC = Owner;
   if (!isFriend && D->isOutOfLine()) {
@@ -1262,20 +1259,19 @@ TemplateDeclInstantiator::VisitCXXMethodDecl(CXXMethodDecl *D,
       return 0;    
   }
 
-  NestedNameSpecifier *Qualifier = D->getQualifier();
-  if (Qualifier) {
-    Qualifier = SemaRef.SubstNestedNameSpecifier(Qualifier,
-                                                 D->getQualifierRange(),
+  NestedNameSpecifierLoc QualifierLoc = D->getQualifierLoc();
+  if (QualifierLoc) {
+    QualifierLoc = SemaRef.SubstNestedNameSpecifierLoc(QualifierLoc,
                                                  TemplateArgs);
-    if (!Qualifier) return 0;
+    if (!QualifierLoc) 
+      return 0;
   }
 
   DeclContext *DC = Owner;
   if (isFriend) {
-    if (Qualifier) {
+    if (QualifierLoc) {
       CXXScopeSpec SS;
-      SS.setScopeRep(Qualifier);
-      SS.setRange(D->getQualifierRange());
+      SS.Adopt(QualifierLoc);
       DC = SemaRef.computeDeclContext(SS);
 
       if (DC && SemaRef.RequireCompleteDeclContext(SS, DC))
@@ -1318,8 +1314,8 @@ TemplateDeclInstantiator::VisitCXXMethodDecl(CXXMethodDecl *D,
                                    D->isInlineSpecified());
   }
 
-  if (Qualifier)
-    Method->setQualifierInfo(Qualifier, D->getQualifierRange());
+  if (QualifierLoc)
+    Method->setQualifierInfo(QualifierLoc);
 
   if (TemplateParams) {
     // Our resulting instantiation is actually a function template, since we
@@ -1641,12 +1637,13 @@ TemplateDeclInstantiator::VisitTemplateTemplateParmDecl(
 }
 
 Decl *TemplateDeclInstantiator::VisitUsingDirectiveDecl(UsingDirectiveDecl *D) {
-  // Using directives are never dependent, so they require no explicit
+  // Using directives are never dependent (and never contain any types or
+  // expressions), so they require no explicit instantiation work.
   
   UsingDirectiveDecl *Inst
     = UsingDirectiveDecl::Create(SemaRef.Context, Owner, D->getLocation(),
                                  D->getNamespaceKeyLocation(), 
-                                 D->getQualifierRange(), D->getQualifier(), 
+                                 D->getQualifierLoc(),
                                  D->getIdentLocation(), 
                                  D->getNominatedNamespace(), 
                                  D->getCommonAncestor());
@@ -1664,12 +1661,11 @@ Decl *TemplateDeclInstantiator::VisitUsingDecl(UsingDecl *D) {
   //     template struct t<int>;
   // Here, in using s1::f1, s1 refers to t<T>::s1;
   // we need to substitute for t<int>::s1.
-  NestedNameSpecifier *NNS =
-      SemaRef.SubstNestedNameSpecifier(D->getTargetNestedNameDecl(),
-      D->getNestedNameRange(),
-      TemplateArgs);
-  if (!NNS)
-      return 0;
+  NestedNameSpecifierLoc QualifierLoc
+    = SemaRef.SubstNestedNameSpecifierLoc(D->getQualifierLoc(),
+                                          TemplateArgs);
+  if (!QualifierLoc)
+    return 0;
 
   // The name info is non-dependent, so no transformation
   // is required.
@@ -1684,16 +1680,13 @@ Decl *TemplateDeclInstantiator::VisitUsingDecl(UsingDecl *D) {
                     Sema::ForRedeclaration);
 
   UsingDecl *NewUD = UsingDecl::Create(SemaRef.Context, Owner,
-                                       D->getNestedNameRange(),
                                        D->getUsingLocation(),
-                                       NNS,
+                                       QualifierLoc,
                                        NameInfo,
                                        D->isTypeName());
 
   CXXScopeSpec SS;
-  SS.setScopeRep(NNS);
-  SS.setRange(D->getNestedNameRange());
-
+  SS.Adopt(QualifierLoc);
   if (CheckRedeclaration) {
     Prev.setHideTags(false);
     SemaRef.LookupQualifiedName(Prev, Owner);
@@ -1752,16 +1745,14 @@ Decl *TemplateDeclInstantiator::VisitUsingShadowDecl(UsingShadowDecl *D) {
 
 Decl * TemplateDeclInstantiator
     ::VisitUnresolvedUsingTypenameDecl(UnresolvedUsingTypenameDecl *D) {
-  NestedNameSpecifier *NNS =
-    SemaRef.SubstNestedNameSpecifier(D->getTargetNestedNameSpecifier(),
-                                     D->getTargetNestedNameRange(),
-                                     TemplateArgs);
-  if (!NNS)
+  NestedNameSpecifierLoc QualifierLoc
+    = SemaRef.SubstNestedNameSpecifierLoc(D->getQualifierLoc(), 
+                                          TemplateArgs);
+  if (!QualifierLoc)
     return 0;
 
   CXXScopeSpec SS;
-  SS.setRange(D->getTargetNestedNameRange());
-  SS.setScopeRep(NNS);
+  SS.Adopt(QualifierLoc);
 
   // Since NameInfo refers to a typename, it cannot be a C++ special name.
   // Hence, no tranformation is required for it.
@@ -1779,16 +1770,13 @@ Decl * TemplateDeclInstantiator
 
 Decl * TemplateDeclInstantiator
     ::VisitUnresolvedUsingValueDecl(UnresolvedUsingValueDecl *D) {
-  NestedNameSpecifier *NNS =
-    SemaRef.SubstNestedNameSpecifier(D->getTargetNestedNameSpecifier(),
-                                     D->getTargetNestedNameRange(),
-                                     TemplateArgs);
-  if (!NNS)
+  NestedNameSpecifierLoc QualifierLoc
+      = SemaRef.SubstNestedNameSpecifierLoc(D->getQualifierLoc(), TemplateArgs);
+  if (!QualifierLoc)
     return 0;
-
+  
   CXXScopeSpec SS;
-  SS.setRange(D->getTargetNestedNameRange());
-  SS.setScopeRep(NNS);
+  SS.Adopt(QualifierLoc);
 
   DeclarationNameInfo NameInfo
     = SemaRef.SubstDeclarationNameInfo(D->getNameInfo(), TemplateArgs);