Revert "[Sema] Fix warnings"

This reverts commit 65e2fab because I'm also reverting 7115ed0.

Author: adrian-prantl

clang/lib/Sema/SemaTemplate.cpp

@@ -9276,6 +9276,8 @@ DeclResult Sema::ActOnClassTemplateSpecialization(
 
   // NOTE: KWLoc is the location of the tag keyword. This will instead
   // store the location of the outermost template keyword in the declaration.
+  SourceLocation TemplateKWLoc = TemplateParameterLists.size() > 0
+    ? TemplateParameterLists[0]->getTemplateLoc() : KWLoc;
   SourceLocation TemplateNameLoc = TemplateId.TemplateNameLoc;
   SourceLocation LAngleLoc = TemplateId.LAngleLoc;
   SourceLocation RAngleLoc = TemplateId.RAngleLoc;

clang/lib/Sema/SemaTemplateInstantiateDecl.cpp

@@ -3932,6 +3932,12 @@ TemplateDeclInstantiator::VisitClassTemplateSpecializationDecl(
   if (SubstQualifier(D, InstD))
     return nullptr;
 
+  // Build the canonical type that describes the converted template
+  // arguments of the class template explicit specialization.
+  QualType CanonType = SemaRef.Context.getTemplateSpecializationType(
+      TemplateName(InstClassTemplate), CanonicalConverted,
+      SemaRef.Context.getRecordType(InstD));
+
   InstD->setAccess(D->getAccess());
   InstD->setInstantiationOfMemberClass(D, TSK_ImplicitInstantiation);
   InstD->setSpecializationKind(D->getSpecializationKind());