More cleanly separate adding from setting elements

src/objects.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_OBJECTS_H_
 #define V8_OBJECTS_H_
 
 #include <iosfwd>
 
 #include "src/allocation.h"
@@ skipping 1875 matching lines @@
 
   // Migrates the given object only if the target map is already available,
   // or returns false if such a map is not yet available.
   static bool TryMigrateInstance(Handle<JSObject> instance);
 
   // Sets the property value in a normalized object given (key, value, details).
   // Handles the special representation of JS global objects.
   static void SetNormalizedProperty(Handle<JSObject> object, Handle<Name> name,
                                     Handle<Object> value,
                                     PropertyDetails details);
+  static void AddDictionaryElement(Handle<JSObject> object, uint32_t index,
+                                   Handle<Object> value,
+                                   PropertyAttributes attributes);
+  static void AddSloppyArgumentsElement(Handle<JSObject> object, uint32_t index,
+                                        Handle<Object> value,
+                                        PropertyAttributes attributes);
   static void SetDictionaryElement(Handle<JSObject> object, uint32_t index,
                                    Handle<Object> value,
                                    PropertyAttributes attributes);
-  static void SetSloppyArgumentsElement(Handle<JSObject> object, uint32_t index,
-                                        Handle<Object> value,
-                                        PropertyAttributes attributes);
+  static void SetDictionaryArgumentsElement(Handle<JSObject> object,
+                                            uint32_t index,
+                                            Handle<Object> value,
+                                            PropertyAttributes attributes);
 
-  static void SetFastElement(Handle<JSObject> object, uint32_t index,
+  static void AddFastElement(Handle<JSObject> object, uint32_t index,
                              Handle<Object> value);
-  static void SetFastDoubleElement(Handle<JSObject> object, uint32_t index,
+  static void AddFastDoubleElement(Handle<JSObject> object, uint32_t index,
                                    Handle<Object> value);
 
   static void OptimizeAsPrototype(Handle<JSObject> object,
                                   PrototypeOptimizationMode mode);
   static void ReoptimizeIfPrototype(Handle<JSObject> object);
   static void LazyRegisterPrototypeUser(Handle<Map> user, Isolate* isolate);
   static bool RegisterPrototypeUserIfNotRegistered(Handle<JSObject> prototype,
                                                    Handle<HeapObject> user,
                                                    Isolate* isolate);
   static bool UnregisterPrototypeUser(Handle<JSObject> prototype,
@@ skipping 8956 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_