Migrate FastCloneShallowObjectStub to TurboFan

src/ast/ast.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.
 
 #ifndef V8_AST_AST_H_
 #define V8_AST_AST_H_
 
 #include "src/assembler.h"
 #include "src/ast/ast-value-factory.h"
 #include "src/ast/modules.h"
@@ skipping 1435 matching lines @@
 
   Handle<FixedArray> constant_properties() const {
     return constant_properties_;
   }
   int properties_count() const { return constant_properties_->length() / 2; }
   ZoneList<Property*>* properties() const { return properties_; }
   bool fast_elements() const { return fast_elements_; }
   bool may_store_doubles() const { return may_store_doubles_; }
   bool has_elements() const { return has_elements_; }
   bool has_shallow_properties() const {
-    return depth() == 1 && !has_elements() && !may_store_doubles();
+    return depth() == 1 && !has_elements() &&
+           (FLAG_unbox_double_fields || !may_store_doubles());
   }
 
   // Decide if a property should be in the object boilerplate.
   static bool IsBoilerplateProperty(Property* property);
 
   // Populate the constant properties fixed array.
   void BuildConstantProperties(Isolate* isolate);
 
   // Mark all computed expressions that are bound to a key that
   // is shadowed by a later occurrence of the same key. For the
@@ skipping 2047 matching lines @@
                                     : NULL;                                   \
   }
 AST_NODE_LIST(DECLARE_NODE_FUNCTIONS)
 #undef DECLARE_NODE_FUNCTIONS
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_AST_AST_H_