Fix usage of literal cloning for large double arrays.

src/code-stubs.cc

 // 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.
 
 #include "src/code-stubs.h"
 
 #include <sstream>
 
 #include "src/ast/ast.h"
 #include "src/bootstrapper.h"
@@ skipping 2137 matching lines @@
   assembler.Bind(&if_keyispositivesmi);
   assembler.TailCallRuntime(Runtime::kLoadElementWithInterceptor, context,
                             receiver, key);
 
   assembler.Bind(&if_keyisinvalid);
   assembler.TailCallRuntime(Runtime::kKeyedLoadIC_Miss, context, receiver, key,
                             slot, vector);
 }
 
 // static
-bool FastCloneShallowObjectStub::IsSupported(ObjectLiteral* expr) {
-  // FastCloneShallowObjectStub doesn't copy elements, and object literals don't
-  // support copy-on-write (COW) elements for now.
-  // TODO(mvstanton): make object literals support COW elements.
-  return expr->fast_elements() && expr->has_shallow_properties() &&
-         expr->properties_count() <= kMaximumClonedProperties;
-}
-
-// static
 int FastCloneShallowObjectStub::PropertiesCount(int literal_length) {
   // This heuristic of setting empty literals to have
   // kInitialGlobalObjectUnusedPropertiesCount must remain in-sync with the
   // runtime.
   // TODO(verwaest): Unify this with the heuristic in the runtime.
   return literal_length == 0
              ? JSObject::kInitialGlobalObjectUnusedPropertiesCount
              : literal_length;
 }
 
@@ skipping 1040 matching lines @@
 }
 
 ArrayConstructorStub::ArrayConstructorStub(Isolate* isolate)
     : PlatformCodeStub(isolate) {}
 
 InternalArrayConstructorStub::InternalArrayConstructorStub(Isolate* isolate)
     : PlatformCodeStub(isolate) {}
 
 }  // namespace internal
 }  // namespace v8