[MS ABI] Number unnamed TagDecls which aren't externally visible
TagDecls (structs, enums, etc.) may have the same name for linkage
purposes of one another; to disambiguate, we add a number to the mangled
named. However, we didn't do this if the TagDecl has a pseudo-name for
linkage purposes (it was defined alongside a DeclaratorDecl or a
TypeNameDecl).
This fixes PR24651.
llvm-svn: 246659
diff --git a/clang/lib/AST/MicrosoftMangle.cpp b/clang/lib/AST/MicrosoftMangle.cpp
index 95ae8f5..dd6e952 100644
--- a/clang/lib/AST/MicrosoftMangle.cpp
+++ b/clang/lib/AST/MicrosoftMangle.cpp
@@ -180,7 +180,9 @@
// Anonymous tags are already numbered.
if (const TagDecl *Tag = dyn_cast<TagDecl>(ND)) {
- if (Tag->getName().empty() && !Tag->getTypedefNameForAnonDecl())
+ if (!Tag->hasNameForLinkage() &&
+ !getASTContext().getDeclaratorForUnnamedTagDecl(Tag) &&
+ !getASTContext().getTypedefNameForUnnamedTagDecl(Tag))
return false;
}