[es6] Fix tail Call nodes marking.

src/ast/prettyprinter.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/ast/prettyprinter.h"
 
 #include <stdarg.h>
 
 #include "src/ast/ast-value-factory.h"
 #include "src/ast/scopes.h"
@@ skipping 1590 matching lines @@
   if (literal != NULL && literal->value()->IsInternalizedString()) {
     PrintLiteralIndented("NAME", literal->value(), false);
   } else {
     PrintIndentedVisit("KEY", node->key());
   }
 }
 
 
 void AstPrinter::VisitCall(Call* node) {
   EmbeddedVector<char, 128> buf;
-  FormatSlotNode(&buf, node, "CALL", node->CallFeedbackICSlot());
+  const char* name =
+      node->tail_call_mode() == TailCallMode::kAllow ? "TAIL CALL" : "CALL";
+  FormatSlotNode(&buf, node, name, node->CallFeedbackICSlot());
   IndentedScope indent(this, buf.start());
 
   Visit(node->expression());
   PrintArguments(node->arguments());
 }
 
 
 void AstPrinter::VisitCallNew(CallNew* node) {
   IndentedScope indent(this, "CALL NEW", node->position());
   Visit(node->expression());
@@ skipping 67 matching lines @@
 void AstPrinter::VisitRewritableAssignmentExpression(
     RewritableAssignmentExpression* node) {
   Visit(node->expression());
 }
 
 
 #endif  // DEBUG
 
 }  // namespace internal
 }  // namespace v8