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

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@375304 91177308-0d34-0410-b5e6-96231b3b80d8

lib/AST/TypePrinter.cpp

@@ -1204,7 +1204,8 @@ void TypePrinter::printTag(TagDecl *D, raw_ostream &OS) {
   // arguments.
   if (const auto *Spec = dyn_cast<ClassTemplateSpecializationDecl>(D)) {
     ArrayRef<TemplateArgument> Args;
-    if (TypeSourceInfo *TAW = Spec->getTypeAsWritten()) {
+    TypeSourceInfo *TAW = Spec->getTypeAsWritten();
+    if (!Policy.PrintCanonicalTypes && TAW) {
       const TemplateSpecializationType *TST =
         cast<TemplateSpecializationType>(TAW->getType());
       Args = TST->template_arguments();

lib/CodeGen/CGDebugInfo.cpp

@@ -314,7 +314,9 @@ StringRef CGDebugInfo::getClassName(const RecordDecl *RD) {
   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.

test/CodeGenCXX/debug-info-template-explicit-specialization.cpp

@@ -105,7 +105,12 @@ struct j {
 };
 extern template class j<int>;
 j<int> jj;
+template <typename T>
+struct j_wrap {
+};
+j_wrap<j<int>> j_wrap_j;
 // CHECK: DICompositeType(tag: DW_TAG_structure_type, name: "j<int, int>"
+// CHECK: DICompositeType(tag: DW_TAG_structure_type, name: "j_wrap<j<int, int> >"
 
 template <typename T>
 struct k {