[-cxx-abi microsoft] Mangle __uuidof correctly into template parameters
Summary:
It seems that __uuidof introduces a global extern "C" declaration of
type __s_GUID. However, our implementation of __uuidof does not provide
such a declaration and thus must open-code the mangling for __uuidof in
template parameters.
This allows us to codegen scoped COM pointers and other such things.
This fixes PR16836.
Depends on D1356.
Reviewers: rnk, cdavis5x, rsmith
Reviewed By: rnk
CC: cfe-commits
Differential Revision: http://llvm-reviews.chandlerc.com/D1357
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@188252 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ExprCXX.cpp b/lib/AST/ExprCXX.cpp
index 496697f..055fc3b 100644
--- a/lib/AST/ExprCXX.cpp
+++ b/lib/AST/ExprCXX.cpp
@@ -72,6 +72,21 @@
return 0;
}
+StringRef CXXUuidofExpr::getUuidAsStringRef(ASTContext &Context) const {
+ StringRef Uuid;
+ if (isTypeOperand())
+ Uuid = CXXUuidofExpr::GetUuidAttrOfType(getTypeOperand())->getGuid();
+ else {
+ // Special case: __uuidof(0) means an all-zero GUID.
+ Expr *Op = getExprOperand();
+ if (!Op->isNullPointerConstant(Context, Expr::NPC_ValueDependentIsNull))
+ Uuid = CXXUuidofExpr::GetUuidAttrOfType(Op->getType())->getGuid();
+ else
+ Uuid = "00000000-0000-0000-0000-000000000000";
+ }
+ return Uuid;
+}
+
// CXXScalarValueInitExpr
SourceLocation CXXScalarValueInitExpr::getLocStart() const {
return TypeInfo ? TypeInfo->getTypeLoc().getBeginLoc() : RParenLoc;