[OpenCL] Add constant address space to __func__ in AST.

Added string literal helper function to obtain the type
attributed by a constant address space.

Also fixed predefind __func__ expr to use the helper
to constract the string literal correctly.

Differential Revision: https://reviews.llvm.org/D46049

llvm-svn: 331877

1 files changed, 6 insertions, 0 deletions

diff --git a/clang/lib/AST/ASTContext.cpp b/clang/lib/AST/ASTContext.cpp
index 0f76136e351..5c64b94c40e 100644
--- a/clang/lib/AST/ASTContext.cpp
+++ b/clang/lib/AST/ASTContext.cpp
@@ -3621,6 +3621,12 @@ QualType ASTContext::getPipeType(QualType T, bool ReadOnly) const {
   return QualType(New, 0);
 }
 
+QualType ASTContext::adjustStringLiteralBaseType(QualType Ty) const {
+  // OpenCL v1.1 s6.5.3: a string literal is in the constant address space.
+  return LangOpts.OpenCL ? getAddrSpaceQualType(Ty, LangAS::opencl_constant)
+                         : Ty;
+}
+
 QualType ASTContext::getReadPipeType(QualType T) const {
   return getPipeType(T, true);
 }