[es6] Tail calls support.

src/crankshaft/hydrogen.cc

Index: src/crankshaft/hydrogen.cc
diff --git a/src/crankshaft/hydrogen.cc b/src/crankshaft/hydrogen.cc
index e3fe00a62f24c2b4ca1e73cda9415dcd4d075495..23dc439ece6fc371a7b5f6b35886cb1b0251e067 100644
--- a/src/crankshaft/hydrogen.cc
+++ b/src/crankshaft/hydrogen.cc
@@ -6574,7 +6574,8 @@ HValue* HOptimizedGraphBuilder::BuildMonomorphicAccess(
       HValue* function = Add<HConstant>(info->accessor());
       PushArgumentsFromEnvironment(argument_count);
       return New<HCallFunction>(function, argument_count,
-                                ConvertReceiverMode::kNotNullOrUndefined);
+                                ConvertReceiverMode::kNotNullOrUndefined,
+                                TailCallMode::kDisallow);
     } else if (FLAG_inline_accessors && can_inline_accessor) {
       bool success = info->IsLoad()
           ? TryInlineGetter(info->accessor(), info->map(), ast_id, return_id)
@@ -8149,7 +8150,8 @@ void HOptimizedGraphBuilder::HandlePolymorphicCallNamed(Call* expr,
       HInstruction* call =
           needs_wrapping ? NewUncasted<HCallFunction>(
                                function, argument_count,
-                               ConvertReceiverMode::kNotNullOrUndefined)
+                               ConvertReceiverMode::kNotNullOrUndefined,
+                               expr->tail_call_mode())
                          : BuildCallConstantFunction(target, argument_count);
       PushArgumentsFromEnvironment(argument_count);
       AddInstruction(call);
@@ -8180,7 +8182,8 @@ void HOptimizedGraphBuilder::HandlePolymorphicCallNamed(Call* expr,
     CHECK_ALIVE(VisitExpressions(expr->arguments()));
 
     HInstruction* call = New<HCallFunction>(
-        function, argument_count, ConvertReceiverMode::kNotNullOrUndefined);
+        function, argument_count, ConvertReceiverMode::kNotNullOrUndefined,
+        expr->tail_call_mode());
 
     PushArgumentsFromEnvironment(argument_count);
 
@@ -9707,7 +9710,8 @@ void HOptimizedGraphBuilder::VisitCall(Call* expr) {
         // TODO(verwaest): Support creation of value wrappers directly in
         // HWrapReceiver.
         call = New<HCallFunction>(function, argument_count,
-                                  ConvertReceiverMode::kNotNullOrUndefined);
+                                  ConvertReceiverMode::kNotNullOrUndefined,
+                                  expr->tail_call_mode());
       } else if (TryInlineCall(expr)) {
         return;
       } else {
@@ -9731,7 +9735,8 @@ void HOptimizedGraphBuilder::VisitCall(Call* expr) {
 
       CHECK_ALIVE(VisitExpressions(expr->arguments(), arguments_flag));
       call = New<HCallFunction>(function, argument_count,
-                                ConvertReceiverMode::kNotNullOrUndefined);
+                                ConvertReceiverMode::kNotNullOrUndefined,
+                                expr->tail_call_mode());
     }
     PushArgumentsFromEnvironment(argument_count);
 
@@ -9782,7 +9787,8 @@ void HOptimizedGraphBuilder::VisitCall(Call* expr) {
     } else {
       PushArgumentsFromEnvironment(argument_count);
       HCallFunction* call_function = New<HCallFunction>(
-          function, argument_count, ConvertReceiverMode::kNullOrUndefined);
+          function, argument_count, ConvertReceiverMode::kNullOrUndefined,
+          expr->tail_call_mode());
       call = call_function;
       if (expr->is_uninitialized() &&
           expr->IsUsingCallFeedbackICSlot(isolate())) {