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, 40 insertions, 9 deletions

diff --git a/contrib/llvm/tools/clang/lib/Parse/ParseDecl.cpp b/contrib/llvm/tools/clang/lib/Parse/ParseDecl.cpp
index 5a7fc7e..077edd7 100644
--- a/contrib/llvm/tools/clang/lib/Parse/ParseDecl.cpp
+++ b/contrib/llvm/tools/clang/lib/Parse/ParseDecl.cpp
@@ -667,6 +667,8 @@ Decl *Parser::ParseDeclarationAfterDeclarator(Declarator &D,
     Actions.ActOnUninitializedDecl(ThisDecl, TypeContainsAuto);
   }
 
+  Actions.FinalizeDeclaration(ThisDecl);
+
   return ThisDecl;
 }
 
@@ -954,8 +956,9 @@ void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
         goto DoneWithDeclSpec;
 
       CXXScopeSpec SS;
-      SS.setScopeRep((NestedNameSpecifier*) Tok.getAnnotationValue());
-      SS.setRange(Tok.getAnnotationRange());
+      Actions.RestoreNestedNameSpecifierAnnotation(Tok.getAnnotationValue(),
+                                                   Tok.getAnnotationRange(),
+                                                   SS);
 
       // We are looking for a qualified typename.
       Token Next = NextToken();
@@ -1244,9 +1247,18 @@ void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
                                          DiagID, getLang());
       break;
     case tok::kw_auto:
-      if (getLang().CPlusPlus0x)
-        isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec,
-                                       DiagID);
+      if (getLang().CPlusPlus0x || getLang().ObjC2) {
+        if (isKnownToBeTypeSpecifier(GetLookAheadToken(1))) {
+          isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_auto, Loc, PrevSpec,
+                                           DiagID, getLang());
+          if (!isInvalid)
+            Diag(Tok, diag::auto_storage_class)
+              << FixItHint::CreateRemoval(DS.getStorageClassSpecLoc());
+        }
+        else
+          isInvalid = DS.SetTypeSpecType(DeclSpec::TST_auto, Loc, PrevSpec,
+                                         DiagID);
+      }
       else
         isInvalid = DS.SetStorageClassSpec(DeclSpec::SCS_auto, Loc, PrevSpec,
                                            DiagID, getLang());
@@ -1459,6 +1471,7 @@ void Parser::ParseDeclarationSpecifiers(DeclSpec &DS,
       else
         Diag(Tok, DiagID) << PrevSpec;
     }
+
     DS.SetRangeEnd(Tok.getLocation());
     ConsumeToken();
   }
@@ -1973,6 +1986,7 @@ void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS,
     }
   }
 
+  bool AllowFixedUnderlyingType = getLang().CPlusPlus0x || getLang().Microsoft;
   bool IsScopedEnum = false;
   bool IsScopedUsingClassTag = false;
 
@@ -1984,7 +1998,8 @@ void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS,
   }
 
   // Must have either 'enum name' or 'enum {...}'.
-  if (Tok.isNot(tok::identifier) && Tok.isNot(tok::l_brace)) {
+  if (Tok.isNot(tok::identifier) && Tok.isNot(tok::l_brace) &&
+      (AllowFixedUnderlyingType && Tok.isNot(tok::colon))) {
     Diag(Tok, diag::err_expected_ident_lbrace);
 
     // Skip the rest of this declarator, up until the comma or semicolon.
@@ -2011,7 +2026,7 @@ void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS,
   TypeResult BaseType;
 
   // Parse the fixed underlying type.
-  if (getLang().CPlusPlus0x && Tok.is(tok::colon)) {
+  if (AllowFixedUnderlyingType && Tok.is(tok::colon)) {
     bool PossibleBitfield = false;
     if (getCurScope()->getFlags() & Scope::ClassScope) {
       // If we're in class scope, this can either be an enum declaration with
@@ -2043,7 +2058,9 @@ void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS,
         // Consume the ':'.
         ConsumeToken();
       
-        if (isCXXDeclarationSpecifier() != TPResult::True()) {
+        if ((getLang().CPlusPlus && 
+             isCXXDeclarationSpecifier() != TPResult::True()) ||
+            (!getLang().CPlusPlus && !isDeclarationSpecifier(true))) {
           // We'll parse this as a bitfield later.
           PossibleBitfield = true;
           TPA.Revert();
@@ -2060,6 +2077,10 @@ void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS,
     if (!PossibleBitfield) {
       SourceRange Range;
       BaseType = ParseTypeName(&Range);
+      
+      if (!getLang().CPlusPlus0x)
+        Diag(StartLoc, diag::ext_ms_enum_fixed_underlying_type)
+          << Range;
     }
   }
 
@@ -2090,6 +2111,14 @@ void Parser::ParseEnumSpecifier(SourceLocation StartLoc, DeclSpec &DS,
     return;      
   }
   
+  if (!Name && TUK != Sema::TUK_Definition) {
+    Diag(Tok, diag::err_enumerator_unnamed_no_def);
+    
+    // Skip the rest of this declarator, up until the comma or semicolon.
+    SkipUntil(tok::comma, true);
+    return;
+  }
+      
   bool Owned = false;
   bool IsDependent = false;
   SourceLocation TSTLoc = NameLoc.isValid()? NameLoc : StartLoc;
@@ -2734,6 +2763,9 @@ void Parser::ParseDeclaratorInternal(Declarator &D,
     if (Kind == tok::star)
       // Remember that we parsed a pointer type, and remember the type-quals.
       D.AddTypeInfo(DeclaratorChunk::getPointer(DS.getTypeQualifiers(), Loc,
+                                                DS.getConstSpecLoc(),
+                                                DS.getVolatileSpecLoc(),
+                                                DS.getRestrictSpecLoc(),
                                                 DS.takeAttributes()),
                     SourceLocation());
     else
@@ -3730,4 +3762,3 @@ bool Parser::TryAltiVecTokenOutOfLine(DeclSpec &DS, SourceLocation Loc,
   }
   return false;
 }
-