Implement C++1y decltype(auto).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180610 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/ItaniumMangle.cpp b/lib/AST/ItaniumMangle.cpp
index 0b77933..5ad8021 100644
--- a/lib/AST/ItaniumMangle.cpp
+++ b/lib/AST/ItaniumMangle.cpp
@@ -2275,7 +2275,7 @@
   QualType D = T->getDeducedType();
   // <builtin-type> ::= Da  # dependent auto
   if (D.isNull())
-    Out << "Da";
+    Out << (T->isDecltypeAuto() ? "Dc" : "Da");
   else
     mangleType(D);
 }