Replace set_map_and_elements by MigrateToMap-based SetMapAndElements

src/objects.cc

 // Copyright 2013 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 4654 matching lines @@
                                          int unused_property_fields) {
   if (object->HasFastProperties()) return;
   ASSERT(!object->IsGlobalObject());
   CALL_HEAP_FUNCTION_VOID(
       object->GetIsolate(),
       object->property_dictionary()->TransformPropertiesToFastFor(
           *object, unused_property_fields));
 }
 
 
+void JSObject::ResetElements(Handle<JSObject> object) {
+  CALL_HEAP_FUNCTION_VOID(
+      object->GetIsolate(),
+      object->ResetElements());
+}
+
+
 static Handle<SeededNumberDictionary> CopyFastElementsToDictionary(
     Handle<FixedArrayBase> array,
     int length,
     Handle<SeededNumberDictionary> dictionary) {
   Isolate* isolate = array->GetIsolate();
   Factory* factory = isolate->factory();
   bool has_double_elements = array->IsFixedDoubleArray();
   for (int i = 0; i < length; i++) {
     Handle<Object> value;
     if (has_double_elements) {
@@ skipping 6482 matching lines @@
   }
   Handle<FixedArrayBase> old_elements(object->elements());
   ElementsAccessor* accessor = ElementsAccessor::ForKind(new_elements_kind);
   accessor->CopyElements(object, new_elements, elements_kind);
 
   if (elements_kind != SLOPPY_ARGUMENTS_ELEMENTS) {
     Handle<Map> new_map = (new_elements_kind != elements_kind)
         ? GetElementsTransitionMap(object, new_elements_kind)
         : handle(object->map());
     object->ValidateElements();
-    object->set_map_and_elements(*new_map, *new_elements);
+    JSObject::SetMapAndElements(object, new_map, new_elements);
 
     // Transition through the allocation site as well if present.
     JSObject::UpdateAllocationSite(object, new_elements_kind);
   } else {
     Handle<FixedArray> parameter_map = Handle<FixedArray>::cast(old_elements);
     parameter_map->set(1, *new_elements);
   }
 
   if (FLAG_trace_elements_transitions) {
     PrintElementsTransition(stdout, object, elements_kind, old_elements,
@@ skipping 25 matching lines @@
     new_elements_kind = FAST_DOUBLE_ELEMENTS;
   }
 
   Handle<Map> new_map = GetElementsTransitionMap(object, new_elements_kind);
 
   Handle<FixedArrayBase> old_elements(object->elements());
   ElementsAccessor* accessor = ElementsAccessor::ForKind(FAST_DOUBLE_ELEMENTS);
   accessor->CopyElements(object, elems, elements_kind);
 
   object->ValidateElements();
-  object->set_map_and_elements(*new_map, *elems);
+  JSObject::SetMapAndElements(object, new_map, elems);
 
   if (FLAG_trace_elements_transitions) {
     PrintElementsTransition(stdout, object, elements_kind, old_elements,
                             object->GetElementsKind(), elems);
   }
 
   if (object->IsJSArray()) {
     Handle<JSArray>::cast(object)->set_length(Smi::FromInt(length));
   }
 }
@@ skipping 3119 matching lines @@
     Handle<Map> new_map =
         JSObject::GetElementsTransitionMap(object, FAST_HOLEY_ELEMENTS);
 
     PretenureFlag tenure = isolate->heap()->InNewSpace(*object) ?
         NOT_TENURED: TENURED;
     Handle<FixedArray> fast_elements =
         isolate->factory()->NewFixedArray(dict->NumberOfElements(), tenure);
     dict->CopyValuesTo(*fast_elements);
     object->ValidateElements();
 
-    object->set_map_and_elements(*new_map, *fast_elements);
+    JSObject::SetMapAndElements(object, new_map, fast_elements);
   } else if (object->HasExternalArrayElements() ||
              object->HasFixedTypedArrayElements()) {
     // Typed arrays cannot have holes or undefined elements.
     return handle(Smi::FromInt(
         FixedArrayBase::cast(object->elements())->length()), isolate);
   } else if (!object->HasFastDoubleElements()) {
     EnsureWritableFastElements(object);
   }
   ASSERT(object->HasFastSmiOrObjectElements() ||
          object->HasFastDoubleElements());
@@ skipping 1973 matching lines @@
       isolate->factory()->NewExternalArray(
           fixed_typed_array->length(), typed_array->type(),
           static_cast<uint8_t*>(buffer->backing_store()));
   Handle<Map> new_map = JSObject::GetElementsTransitionMap(
           typed_array,
           FixedToExternalElementsKind(map->elements_kind()));
 
   buffer->set_weak_first_view(*typed_array);
   ASSERT(typed_array->weak_next() == isolate->heap()->undefined_value());
   typed_array->set_buffer(*buffer);
-  typed_array->set_map_and_elements(*new_map, *new_elements);
+  JSObject::SetMapAndElements(typed_array, new_map, new_elements);
 
   return buffer;
 }
 
 
 Handle<JSArrayBuffer> JSTypedArray::GetBuffer() {
   Handle<Object> result(buffer(), GetIsolate());
   if (*result != Smi::FromInt(0)) {
     ASSERT(IsExternalArrayElementsKind(map()->elements_kind()));
     return Handle<JSArrayBuffer>::cast(result);
@@ skipping 64 matching lines @@
 #define ERROR_MESSAGES_TEXTS(C, T) T,
   static const char* error_messages_[] = {
       ERROR_MESSAGES_LIST(ERROR_MESSAGES_TEXTS)
   };
 #undef ERROR_MESSAGES_TEXTS
   return error_messages_[reason];
 }
 
 
 } }  // namespace v8::internal