[MS ABI] Invent a mangling for reference temporaries

MSVC is non-conforming and doesn't have a mangling for these.  Invent
our own to unblock folks using clang.

This fixes PR25795.

llvm-svn: 256589

1 files changed, 6 insertions, 6 deletions

diff --git a/clang/lib/AST/MicrosoftMangle.cpp b/clang/lib/AST/MicrosoftMangle.cpp
index 3e466c826be..ba8ff270279 100644
--- a/clang/lib/AST/MicrosoftMangle.cpp
+++ b/clang/lib/AST/MicrosoftMangle.cpp
@@ -2760,12 +2760,12 @@ void MicrosoftMangleContextImpl::mangleCXXDtor(const CXXDestructorDecl *D,
   mangler.mangle(D);
 }
 
-void MicrosoftMangleContextImpl::mangleReferenceTemporary(const VarDecl *VD,
-                                                          unsigned,
-                                                          raw_ostream &) {
-  unsigned DiagID = getDiags().getCustomDiagID(DiagnosticsEngine::Error,
-    "cannot mangle this reference temporary yet");
-  getDiags().Report(VD->getLocation(), DiagID);
+void MicrosoftMangleContextImpl::mangleReferenceTemporary(
+    const VarDecl *VD, unsigned ManglingNumber, raw_ostream &Out) {
+  MicrosoftCXXNameMangler Mangler(*this, Out);
+
+  Mangler.getStream() << "\01?$RT" << ManglingNumber << '@';
+  Mangler.mangle(VD, "");
 }
 
 void MicrosoftMangleContextImpl::mangleThreadSafeStaticGuardVariable(