[-cxx-abi microsoft] Mangle local TagDecls appropriately
Summary:
When selecting a mangling for an anonymous tag type:
- We should first try it's typedef'd name.
- If that doesn't work, we should mangle in the name of the declarator
that specified it as a declaration specifier.
- If that doesn't work, fall back to a static mangling of
<unnamed-type>.
This should make our anonymous type mangling compatible.
This partially fixes PR16994; we would need to have an implementation of
scope numbering to get it right (a separate issue).
Reviewers: rnk, rsmith, rjmccall, cdavis5x
CC: cfe-commits
Differential Revision: http://llvm-reviews.chandlerc.com/D1540
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190892 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaTemplateInstantiateDecl.cpp b/lib/Sema/SemaTemplateInstantiateDecl.cpp
index cc9cb63..8cd3725 100644
--- a/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -3356,6 +3356,19 @@
NewVar->setReferenced(OldVar->isReferenced());
}
+ // See if the old variable had a type-specifier that defined an anonymous tag.
+ // If it did, mark the new variable as being the declarator for the new
+ // anonymous tag.
+ if (const TagType *OldTagType = OldVar->getType()->getAs<TagType>()) {
+ TagDecl *OldTag = OldTagType->getDecl();
+ if (OldTag->getDeclaratorForAnonDecl() == OldVar) {
+ TagDecl *NewTag = NewVar->getType()->castAs<TagType>()->getDecl();
+ assert(!NewTag->hasNameForLinkage() &&
+ !NewTag->hasDeclaratorForAnonDecl());
+ NewTag->setDeclaratorForAnonDecl(NewVar);
+ }
+ }
+
InstantiateAttrs(TemplateArgs, OldVar, NewVar, LateAttrs, StartingScope);
if (NewVar->hasAttrs())