AST: Mangle fields in anonymous structs/unions

The Itanium mangler couldn't cope with mangling an IndirectFieldDecl.
Instead, mangle the field the IndirectFieldDecl refers to.

Further, give IndirectFieldDecl no linkage just like FieldDecl.

N.B. Decl.cpp:getLVForNamespaceScopeDecl tried to calculate linkage for
data members of anonymous structs/unions.  However, this seems
impossible so turn it into an assertion.

llvm-svn: 193269

1 files changed, 4 insertions, 4 deletions

diff --git a/clang/lib/AST/Decl.cpp b/clang/lib/AST/Decl.cpp
index e18afb02c9d..23e53fffb09 100644
--- a/clang/lib/AST/Decl.cpp
+++ b/clang/lib/AST/Decl.cpp
@@ -575,11 +575,10 @@ static LinkageInfo getLVForNamespaceScopeDecl(const NamedDecl *D,
     // Explicitly declared static.
     if (Function->getCanonicalDecl()->getStorageClass() == SC_Static)
       return LinkageInfo(InternalLinkage, DefaultVisibility, false);
-  } else if (const FieldDecl *Field = dyn_cast<FieldDecl>(D)) {
-    //   - a data member of an anonymous union.
-    if (cast<RecordDecl>(Field->getDeclContext())->isAnonymousStructOrUnion())
-      return LinkageInfo::internal();
   }
+  //   - a data member of an anonymous union.
+  assert(!isa<IndirectFieldDecl>(D) && "Didn't expect an IndirectFieldDecl!");
+  assert(!isa<FieldDecl>(D) && "Didn't expect a FieldDecl!");
 
   if (D->isInAnonymousNamespace()) {
     const VarDecl *Var = dyn_cast<VarDecl>(D);
@@ -786,6 +785,7 @@ static LinkageInfo getLVForClassMember(const NamedDecl *D,
   if (!(isa<CXXMethodDecl>(D) ||
         isa<VarDecl>(D) ||
         isa<FieldDecl>(D) ||
+        isa<IndirectFieldDecl>(D) ||
         isa<TagDecl>(D)))
     return LinkageInfo::none();