[-cxx-abi microsoft] Mangle TemplateArgument::Declaration for references

Summary:
Properly mangle declarations showing up in template arguments that are
reference parameters.  Fun-fact: undname cannot handle these!

Reviewers: rnk, cdavis5x

Reviewed By: rnk

CC: cfe-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1356

llvm-svn: 188245

1 files changed, 4 insertions, 2 deletions

diff --git a/clang/lib/AST/MicrosoftMangle.cpp b/clang/lib/AST/MicrosoftMangle.cpp
index 8d7b76db5e9..765b14d49e5 100644
--- a/clang/lib/AST/MicrosoftMangle.cpp
+++ b/clang/lib/AST/MicrosoftMangle.cpp
@@ -886,9 +886,11 @@ void MicrosoftCXXNameMangler::mangleTemplateArg(const TemplateDecl *TD,
     mangleType(T, SourceRange(), QMM_Escape);
     break;
   }
-  case TemplateArgument::Declaration:
-    mangle(cast<NamedDecl>(TA.getAsDecl()), "$1?");
+  case TemplateArgument::Declaration: {
+    const NamedDecl *ND = cast<NamedDecl>(TA.getAsDecl());
+    mangle(ND, TA.isDeclForReferenceParam() ? "$E?" : "$1?");
     break;
+  }
   case TemplateArgument::Integral:
     mangleIntegerLiteral(TA.getAsIntegral(),
                          TA.getIntegralType()->isBooleanType());