Add bit_field3 to Map objects

src/heap.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1585 matching lines @@
   Map* map = reinterpret_cast<Map*>(result);
   map->set_map(meta_map());
   map->set_instance_type(instance_type);
   map->set_visitor_id(
       StaticVisitorBase::GetVisitorId(instance_type, instance_size));
   map->set_prototype(null_value());
   map->set_constructor(null_value());
   map->set_instance_size(instance_size);
   map->set_inobject_properties(0);
   map->set_pre_allocated_property_fields(0);
-  map->set_instance_descriptors(empty_descriptor_array());
+  map->init_instance_descriptors();
   map->set_code_cache(empty_fixed_array());
   map->set_prototype_transitions(empty_fixed_array());
   map->set_unused_property_fields(0);
   map->set_bit_field(0);
   map->set_bit_field2((1 << Map::kIsExtensible) | (1 << Map::kHasFastElements));
 
   // If the map object is aligned fill the padding area with Smi 0 objects.
   if (Map::kPadStart < Map::kSize) {
     memset(reinterpret_cast<byte*>(map) + Map::kPadStart - kHeapObjectTag,
            0,
@@ skipping 72 matching lines @@
   set_null_value(obj);
   Oddball::cast(obj)->set_kind(Oddball::kNull);
 
   // Allocate the empty descriptor array.
   { MaybeObject* maybe_obj = AllocateEmptyFixedArray();
     if (!maybe_obj->ToObject(&obj)) return false;
   }
   set_empty_descriptor_array(DescriptorArray::cast(obj));
 
   // Fix the instance_descriptors for the existing maps.
-  meta_map()->set_instance_descriptors(empty_descriptor_array());
+  meta_map()->init_instance_descriptors();
   meta_map()->set_code_cache(empty_fixed_array());
   meta_map()->set_prototype_transitions(empty_fixed_array());
 
-  fixed_array_map()->set_instance_descriptors(empty_descriptor_array());
+  fixed_array_map()->init_instance_descriptors();
   fixed_array_map()->set_code_cache(empty_fixed_array());
   fixed_array_map()->set_prototype_transitions(empty_fixed_array());
 
-  oddball_map()->set_instance_descriptors(empty_descriptor_array());
+  oddball_map()->init_instance_descriptors();
   oddball_map()->set_code_cache(empty_fixed_array());
   oddball_map()->set_prototype_transitions(empty_fixed_array());
 
   // Fix prototype object for existing maps.
   meta_map()->set_prototype(null_value());
   meta_map()->set_constructor(null_value());
 
   fixed_array_map()->set_prototype(null_value());
   fixed_array_map()->set_constructor(null_value());
 
@@ skipping 1582 matching lines @@
   InitializeJSObjectFromMap(global, dictionary, map);
 
   // Create a new map for the global object.
   { MaybeObject* maybe_obj = map->CopyDropDescriptors();
     if (!maybe_obj->ToObject(&obj)) return maybe_obj;
   }
   Map* new_map = Map::cast(obj);
 
   // Setup the global object as a normalized object.
   global->set_map(new_map);
-  global->map()->set_instance_descriptors(empty_descriptor_array());
+  global->map()->clear_instance_descriptors();
   global->set_properties(dictionary);
 
   // Make sure result is a global object with properties in dictionary.
   ASSERT(global->IsGlobalObject());
   ASSERT(!global->HasFastProperties());
   return global;
 }
 
 
 MaybeObject* Heap::CopyJSObject(JSObject* source) {
@@ skipping 2580 matching lines @@
 }
 
 
 void ExternalStringTable::TearDown() {
   new_space_strings_.Free();
   old_space_strings_.Free();
 }
 
 
 } }  // namespace v8::internal