Refactor Maps' code_cache

src/objects-inl.h

 // Copyright 2012 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.
 //
 // Review notes:
 //
 // - The use of macros in these inline functions may seem superfluous
 // but it is absolutely needed to make sure gcc generates optimal
 // code. gcc is not happy when attempting to inline too deep.
 //
@@ skipping 4679 matching lines @@
 
 
 bool Map::is_stable() {
   return !IsUnstable::decode(bit_field3());
 }
 
 
 bool Map::has_code_cache() {
   // Code caches are always fixed arrays. The empty fixed array is used as a
   // sentinel for an absent code cache.
-  return FixedArray::cast(code_cache())->length() != 0;
+  return code_cache()->length() != 0;
 }
 
 
 bool Map::CanBeDeprecated() {
   int descriptor = LastAdded();
   for (int i = 0; i <= descriptor; i++) {
     PropertyDetails details = instance_descriptors()->GetDetails(i);
     if (details.representation().IsNone()) return true;
     if (details.representation().IsSmi()) return true;
     if (details.representation().IsDouble()) return true;
@@ skipping 713 matching lines @@
 
 
 void Map::SetBackPointer(Object* value, WriteBarrierMode mode) {
   DCHECK(instance_type() >= FIRST_JS_RECEIVER_TYPE);
   DCHECK((value->IsMap() && GetBackPointer()->IsUndefined()));
   DCHECK(!value->IsMap() ||
          Map::cast(value)->GetConstructor() == constructor_or_backpointer());
   set_constructor_or_backpointer(value, mode);
 }
 
-
-ACCESSORS(Map, code_cache, Object, kCodeCacheOffset)
+ACCESSORS(Map, code_cache, FixedArray, kCodeCacheOffset)
 ACCESSORS(Map, dependent_code, DependentCode, kDependentCodeOffset)
 ACCESSORS(Map, weak_cell_cache, Object, kWeakCellCacheOffset)
 ACCESSORS(Map, constructor_or_backpointer, Object,
           kConstructorOrBackPointerOffset)
 
 
 Object* Map::GetConstructor() const {
   Object* maybe_constructor = constructor_or_backpointer();
   // Follow any back pointers.
   while (maybe_constructor->IsMap()) {
@@ skipping 2461 matching lines @@
 #undef WRITE_INT64_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 #undef NOBARRIER_READ_BYTE_FIELD
 #undef NOBARRIER_WRITE_BYTE_FIELD
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_OBJECTS_INL_H_