Adding %_NewObject intrinsic

src/compiler/js-intrinsic-lowering.cc

Index: src/compiler/js-intrinsic-lowering.cc
diff --git a/src/compiler/js-intrinsic-lowering.cc b/src/compiler/js-intrinsic-lowering.cc
index 5ca08c411bafda2cb85b608bc92b95b545647ebe..07d1726bd1942ef00990c143f1b5b4ba2e9a6610 100644
--- a/src/compiler/js-intrinsic-lowering.cc
+++ b/src/compiler/js-intrinsic-lowering.cc
@@ -89,6 +89,8 @@ Reduction JSIntrinsicLowering::Reduce(Node* node) {
       return ReduceToString(node);
     case Runtime::kInlineCall:
       return ReduceCall(node);
+    case Runtime::kInlineNewObject:
+      return ReduceNewObject(node);
     case Runtime::kInlineGetSuperConstructor:
       return ReduceGetSuperConstructor(node);
     case Runtime::kInlineGetOrdinaryHasInstance:
@@ -477,6 +479,9 @@ Reduction JSIntrinsicLowering::ReduceCall(Node* node) {
   return Changed(node);
 }
 
+Reduction JSIntrinsicLowering::ReduceNewObject(Node* node) {
+  return Change(node, CodeFactory::FastNewObject(isolate()), 0);

[Benedikt Meurer, 2016/03/31 17:49:29]

%_NewObject should be lowered to JSCreate, which does the fast case if possible
and otherwise falls back to FastNewObjectStub.

+}
 
 Reduction JSIntrinsicLowering::ReduceGetSuperConstructor(Node* node) {
   Node* active_function = NodeProperties::GetValueInput(node, 0);