[stubs] Add CreateIterResultObject stub

src/builtins/builtins-generator.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-utils.h"
 #include "src/builtins/builtins.h"
 #include "src/code-factory.h"
 #include "src/code-stub-assembler.h"
 
 namespace v8 {
@@ skipping 47 matching lines @@
     Node* result = assembler->CallRuntime(
         Runtime::kThrowIncompatibleMethodReceiver, context,
         assembler->HeapConstant(assembler->factory()->NewStringFromAsciiChecked(
             method_name, TENURED)),
         receiver);
     assembler->Return(result);  // Never reached.
   }
 
   assembler->Bind(&if_receiverisclosed);
   {
+    Callable create_iter_result_object =
+        CodeFactory::CreateIterResultObject(assembler->isolate());
+
     // The {receiver} is closed already.
     Node* result = nullptr;
     switch (resume_mode) {
       case JSGeneratorObject::kNext:
-        result = assembler->CallRuntime(Runtime::kCreateIterResultObject,
-                                        context, assembler->UndefinedConstant(),
-                                        assembler->BooleanConstant(true));
+        result = assembler->CallStub(create_iter_result_object, context,
+                                     assembler->UndefinedConstant(),
+                                     assembler->TrueConstant());
         break;
       case JSGeneratorObject::kReturn:
-        result =
-            assembler->CallRuntime(Runtime::kCreateIterResultObject, context,
-                                   value, assembler->BooleanConstant(true));
+        result = assembler->CallStub(create_iter_result_object, context, value,
+                                     assembler->TrueConstant());
         break;
       case JSGeneratorObject::kThrow:
         result = assembler->CallRuntime(Runtime::kThrow, context, value);
         break;
     }
     assembler->Return(result);
   }
 
   assembler->Bind(&if_receiverisrunning);
   {
@@ skipping 24 matching lines @@
 // ES6 section 25.3.1.4 Generator.prototype.throw ( exception )
 void Builtins::Generate_GeneratorPrototypeThrow(
     compiler::CodeAssemblerState* state) {
   CodeStubAssembler assembler(state);
   Generate_GeneratorPrototypeResume(&assembler, JSGeneratorObject::kThrow,
                                     "[Generator].prototype.throw");
 }
 
 }  // namespace internal
 }  // namespace v8