[MSVC Compat] Implementation of __unaligned (MS extension) as a type qualifier

This patch implements __unaligned as a type qualifier; before that, it was
modeled as an attribute. Proper mangling of __unaligned is implemented as well.
Some OpenCL code/tests are tangenially affected, as they relied on existing
number and sizes of type qualifiers.

Differential Revision: http://reviews.llvm.org/D18596

llvm-svn: 266415

1 files changed, 5 insertions, 0 deletions

diff --git a/clang/lib/AST/MicrosoftMangle.cpp b/clang/lib/AST/MicrosoftMangle.cpp
index c9caddbb6fc..617e22d3b30 100644
--- a/clang/lib/AST/MicrosoftMangle.cpp
+++ b/clang/lib/AST/MicrosoftMangle.cpp
@@ -1444,6 +1444,9 @@ void MicrosoftCXXNameMangler::manglePointerExtQualifiers(Qualifiers Quals,
       (PointeeType.isNull() || !PointeeType->isFunctionType()))
     Out << 'E';
 
+  if (!PointeeType.isNull() && PointeeType.getLocalQualifiers().hasUnaligned())
+    Out << 'F';
+
   if (HasRestrict)
     Out << 'I';
 }
@@ -1577,6 +1580,8 @@ void MicrosoftCXXNameMangler::mangleType(QualType T, SourceRange Range,
     }
     break;
   case QMM_Result:
+    // Presence of __unaligned qualifier shouldn't affect mangling here.
+    Quals.removeUnaligned();
     if ((!IsPointer && Quals) || isa<TagType>(T)) {
       Out << '?';
       mangleQualifiers(Quals, false);