Adding %_NewObject intrinsic

src/crankshaft/hydrogen.cc

Index: src/crankshaft/hydrogen.cc
diff --git a/src/crankshaft/hydrogen.cc b/src/crankshaft/hydrogen.cc
index c59c8e5337afe750648fd5c50154e505f3fc672c..0c96427e4a023202fc4b8f975825314b27af1cf6 100644
--- a/src/crankshaft/hydrogen.cc
+++ b/src/crankshaft/hydrogen.cc
@@ -12543,6 +12543,18 @@ void HOptimizedGraphBuilder::GenerateSubString(CallRuntime* call) {
   return ast_context()->ReturnInstruction(result, call->id());
 }
 
+// Support for direct creation of new objects.
+void HOptimizedGraphBuilder::GenerateNewObject(CallRuntime* call) {
+  DCHECK_EQ(2, call->arguments()->length());
+  CHECK_ALIVE(VisitExpressions(call->arguments()));
+  FastNewObjectStub stub(isolate());
+  FastNewObjectDescriptor descriptor(isolate());
+  HValue* values[] = {context(), Pop(), Pop()};
+  HConstant* stub_value = Add<HConstant>(stub.GetCode());
+  HInstruction* result = New<HCallWithDescriptor>(
+      stub_value, 0, descriptor, Vector<HValue*>(values, arraysize(values)));
+  return ast_context()->ReturnInstruction(result, call->id());
+}
 
 // Support for direct calls from JavaScript to native RegExp code.
 void HOptimizedGraphBuilder::GenerateRegExpExec(CallRuntime* call) {