MS ABI: Only class templates get complex nullptr pointer-to-member-functions

r210637 regressed CodeGenCXX/mangle-ms-templates-memptrs.cpp because it
did not believe that there is a distinction between class templates and
function templates.

Sadly, there is.  Function templates should behave in a compatible
manner with MSVC.

llvm-svn: 210642

1 files changed, 7 insertions, 4 deletions

diff --git a/clang/lib/AST/MicrosoftMangle.cpp b/clang/lib/AST/MicrosoftMangle.cpp
index 481ed44347e..33b81693918 100644
--- a/clang/lib/AST/MicrosoftMangle.cpp
+++ b/clang/lib/AST/MicrosoftMangle.cpp
@@ -1156,13 +1156,16 @@ void MicrosoftCXXNameMangler::mangleTemplateArg(const TemplateDecl *TD,
     QualType T = TA.getNullPtrType();
     if (const MemberPointerType *MPT = T->getAs<MemberPointerType>()) {
       const CXXRecordDecl *RD = MPT->getMostRecentCXXRecordDecl();
-      if (MPT->isMemberFunctionPointerType())
+      if (MPT->isMemberFunctionPointerType() && isa<ClassTemplateDecl>(TD)) {
         mangleMemberFunctionPointer(RD, nullptr);
-      else
+        return;
+      }
+      if (MPT->isMemberDataPointer()) {
         mangleMemberDataPointer(RD, nullptr);
-    } else {
-      Out << "$0A@";
+        return;
+      }
     }
+    Out << "$0A@";
     break;
   }
   case TemplateArgument::Expression: