DebugInfo: Render the canonical name of a class template specialization, even when nested in another class template specialization

Differential Revision: https://reviews.llvm.org/D63031

llvm-svn: 375304
diff --git a/clang/lib/CodeGen/CGDebugInfo.cpp b/clang/lib/CodeGen/CGDebugInfo.cpp
index 7962ae0..294d54e 100644
--- a/clang/lib/CodeGen/CGDebugInfo.cpp
+++ b/clang/lib/CodeGen/CGDebugInfo.cpp
@@ -314,7 +314,9 @@
   if (isa<ClassTemplateSpecializationDecl>(RD)) {
     SmallString<128> Name;
     llvm::raw_svector_ostream OS(Name);
-    RD->getNameForDiagnostic(OS, getPrintingPolicy(),
+    PrintingPolicy PP = getPrintingPolicy();
+    PP.PrintCanonicalTypes = true;
+    RD->getNameForDiagnostic(OS, PP,
                              /*Qualified*/ false);
 
     // Copy this name on the side and use its reference.