Reland of [stubs] Port KeyedLoadIC_Generic stub to TurboFan

src/code-factory.cc

 // Copyright 2014 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/code-factory.h"
 
 #include "src/bootstrapper.h"
 #include "src/ic/ic.h"
 
 namespace v8 {
@@ skipping 64 matching lines @@
   if (FLAG_tf_load_ic_stub) {
     KeyedLoadICTFStub stub(isolate);
     return make_callable(stub);
   }
   KeyedLoadICStub stub(isolate);
   return make_callable(stub);
 }
 
 // static
 Callable CodeFactory::KeyedLoadIC_Megamorphic(Isolate* isolate) {
+  if (FLAG_tf_load_ic_stub) {
+    return Callable(isolate->builtins()->KeyedLoadIC_Megamorphic_TF(),
+                    LoadWithVectorDescriptor(isolate));
+  }
   return Callable(isolate->builtins()->KeyedLoadIC_Megamorphic(),
                   LoadWithVectorDescriptor(isolate));
 }
 
 // static
 Callable CodeFactory::CallIC(Isolate* isolate, int argc,
                              ConvertReceiverMode mode,
                              TailCallMode tail_call_mode) {
   CallICTrampolineStub stub(isolate, CallICState(argc, mode, tail_call_mode));
   return make_callable(stub);
@@ skipping 515 matching lines @@
 }
 
 // static
 Callable CodeFactory::InterpreterOnStackReplacement(Isolate* isolate) {
   return Callable(isolate->builtins()->InterpreterOnStackReplacement(),
                   ContextOnlyDescriptor(isolate));
 }
 
 }  // namespace internal
 }  // namespace v8