[builtins] Add EmitFastNewObject

src/builtins/builtins-promise.cc

 // Copyright 2016 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/builtins/builtins-promise.h"
+#include "src/builtins/builtins-constructor.h"
 #include "src/builtins/builtins-utils.h"
 #include "src/builtins/builtins.h"
 #include "src/code-factory.h"
 #include "src/code-stub-assembler.h"
 #include "src/promise-utils.h"
 
 namespace v8 {
 namespace internal {
 
 typedef compiler::Node Node;
@@ skipping 719 matching lines @@
 
   Bind(&if_targetisnotmodified);
   {
     Node* const instance = AllocateJSPromise(context);
     var_result.Bind(instance);
     Goto(&init);
   }
 
   Bind(&if_targetismodified);
   {
-    Callable fast_new_object_stub = CodeFactory::FastNewObject(isolate);
-    Node* const instance =
-        CallStub(fast_new_object_stub, context, promise_fun, new_target);
+    ConstructorBuiltinsAssembler constructor_assembler(this->state());
+    Node* const instance = constructor_assembler.EmitFastNewObject(
+        context, promise_fun, new_target);
 
     var_result.Bind(instance);
     Goto(&init);
   }
 
   Bind(&init);
   {
     PromiseInit(var_result.value());
     GotoUnless(IsPromiseHookEnabled(), &debug_push);
     CallRuntime(Runtime::kPromiseHookInit, context, var_result.value(),
@@ skipping 305 matching lines @@
         CallStub(getproperty_callable, context, promise, then_str);
     Callable call_callable = CodeFactory::Call(isolate);
     Node* const result =
         CallJS(call_callable, context, then, promise, on_resolve, on_reject);
     Return(result);
   }
 }
 
 }  // namespace internal
 }  // namespace v8