[KeyedLoadIC] Support Smi "handlers" for simple field loads

src/type-feedback-vector.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/type-feedback-vector.h"
 
 #include "src/code-stubs.h"
 #include "src/ic/ic.h"
 #include "src/ic/ic-state.h"
 #include "src/objects.h"
@@ skipping 670 matching lines @@
                    SKIP_WRITE_BARRIER);
 }
 
 void LoadGlobalICNexus::ConfigureHandlerMode(Handle<Code> handler) {
   SetFeedback(GetIsolate()->heap()->empty_weak_cell());
   SetFeedbackExtra(*handler);
 }
 
 void KeyedLoadICNexus::ConfigureMonomorphic(Handle<Name> name,
                                             Handle<Map> receiver_map,
-                                            Handle<Code> handler) {
+                                            Handle<Object> handler) {
   Handle<WeakCell> cell = Map::WeakCellForMap(receiver_map);
   if (name.is_null()) {
     SetFeedback(*cell);
     SetFeedbackExtra(*handler);
   } else {
     Handle<FixedArray> array = EnsureExtraArrayOfSize(2);
     SetFeedback(*name);
     array->set(0, *cell);
     array->set(1, *handler);
   }
@@ skipping 313 matching lines @@
 
 IcCheckType KeyedStoreICNexus::GetKeyType() const {
   Object* feedback = GetFeedback();
   if (feedback == *TypeFeedbackVector::MegamorphicSentinel(GetIsolate())) {
     return static_cast<IcCheckType>(Smi::cast(GetFeedbackExtra())->value());
   }
   return IsPropertyNameFeedback(feedback) ? PROPERTY : ELEMENT;
 }
 }  // namespace internal
 }  // namespace v8