[strong] create strong array literals

src/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/factory.h"
 
 #include "src/allocation-site-scopes.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/conversions.h"
@@ skipping 1614 matching lines @@
       isolate()->heap()->AllocateJSObjectFromMap(
           *map,
           pretenure,
           alloc_props,
           allocation_site.is_null() ? NULL : *allocation_site),
       JSObject);
 }
 
 
 Handle<JSArray> Factory::NewJSArray(ElementsKind elements_kind,
+                                    ObjectStrength strength,
                                     PretenureFlag pretenure) {
-  Context* native_context = isolate()->context()->native_context();
-  JSFunction* array_function = native_context->array_function();
-  Map* map = array_function->initial_map();
-  Map* transition_map = isolate()->get_initial_js_array_map(elements_kind);
-  if (transition_map != NULL) map = transition_map;
+  Map* map = isolate()->get_initial_js_array_map(elements_kind, strength);
+  if (map == nullptr) {
+    DCHECK(strength == WEAK);
+    Context* native_context = isolate()->context()->native_context();
+    JSFunction* array_function = native_context->array_function();
+    map = array_function->initial_map();
+  }
   return Handle<JSArray>::cast(NewJSObjectFromMap(handle(map), pretenure));
 }
 
 
 Handle<JSArray> Factory::NewJSArray(ElementsKind elements_kind,
                                     int length,
                                     int capacity,
+                                    ObjectStrength strength,
                                     ArrayStorageAllocationMode mode,
                                     PretenureFlag pretenure) {
-  Handle<JSArray> array = NewJSArray(elements_kind, pretenure);
+  Handle<JSArray> array = NewJSArray(elements_kind, strength, pretenure);
   NewJSArrayStorage(array, length, capacity, mode);
   return array;
 }
 
 
 Handle<JSArray> Factory::NewJSArrayWithElements(Handle<FixedArrayBase> elements,
                                                 ElementsKind elements_kind,
                                                 int length,
+                                                ObjectStrength strength,
                                                 PretenureFlag pretenure) {
   DCHECK(length <= elements->length());
-  Handle<JSArray> array = NewJSArray(elements_kind, pretenure);
+  Handle<JSArray> array = NewJSArray(elements_kind, strength, pretenure);
 
   array->set_elements(*elements);
   array->set_length(Smi::FromInt(length));
   JSObject::ValidateElements(array);
   return array;
 }
 
 
 void Factory::NewJSArrayStorage(Handle<JSArray> array,
                                 int length,
@@ skipping 768 matching lines @@
   return Handle<Object>::null();
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
 
 } }  // namespace v8::internal