Update ImplicitCastExpr to be able to represent an XValue.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@108807 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/StmtDumper.cpp b/lib/AST/StmtDumper.cpp
index b388a3b..62dcf60 100644
--- a/lib/AST/StmtDumper.cpp
+++ b/lib/AST/StmtDumper.cpp
@@ -340,8 +340,16 @@
 
 void StmtDumper::VisitImplicitCastExpr(ImplicitCastExpr *Node) {
   VisitCastExpr(Node);
-  if (Node->isLvalueCast())
+  switch (Node->getCategory()) {
+  case ImplicitCastExpr::LValue:
     OS << " lvalue";
+    break;
+  case ImplicitCastExpr::XValue:
+    OS << " xvalue";
+    break;
+  default:
+    break;
+  }
 }
 
 void StmtDumper::VisitDeclRefExpr(DeclRefExpr *Node) {