Add a new expression class, ObjCSuperExpr, to handle the Objective-C 'super'. Remove ObjCThis from PredefinedExpr

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@58698 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/StmtPrinter.cpp b/lib/AST/StmtPrinter.cpp
index 34aefc2..420bdbd 100644
--- a/lib/AST/StmtPrinter.cpp
+++ b/lib/AST/StmtPrinter.cpp
@@ -515,9 +515,6 @@
     case PredefinedExpr::PrettyFunction:
       OS << "__PRETTY_FUNCTION__";
       break;
-    case PredefinedExpr::ObjCSuper:
-      OS << "super";
-      break;
   }
 }
 
@@ -917,6 +914,10 @@
   OS << "]";
 }
 
+void StmtPrinter::VisitObjCSuperExpr(ObjCSuperExpr *) {
+  OS << "super";
+}
+
 void StmtPrinter::VisitBlockExpr(BlockExpr *Node) {
   BlockDecl *BD = Node->getBlockDecl();
   OS << "^";