Renamed ConvertDescriptorToFieldAndMapTransition to ConvertTransitionToMapTransition, and let it re…

src/objects.h

 // Copyright 2012 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 1920 matching lines @@
       Isolate* isolate,
       ElementsKind elements_kind);
   MUST_USE_RESULT MaybeObject* GetElementsTransitionMapSlow(
       ElementsKind elements_kind);
 
   static Handle<Object> TransitionElementsKind(Handle<JSObject> object,
                                                ElementsKind to_kind);
 
   MUST_USE_RESULT MaybeObject* TransitionElementsKind(ElementsKind to_kind);
 
-  // Converts a descriptor of any other type to a real field,
-  // backed by the properties array.  Descriptors of visible
-  // types, such as CONSTANT_FUNCTION, keep their enumeration order.
-  // Converts the descriptor on the original object's map to a
-  // map transition, and the the new field is on the object's new map.
-  MUST_USE_RESULT MaybeObject* ConvertDescriptorToFieldAndMapTransition(
+  // Replaces an existing transition with a transition to a map with a FIELD.
+  MUST_USE_RESULT MaybeObject* ConvertTransitionToMapTransition(
+      int transition_index,
       String* name,
       Object* new_value,
       PropertyAttributes attributes);
 
-  // Converts a descriptor of any other type to a real field,
-  // backed by the properties array.  Descriptors of visible
-  // types, such as CONSTANT_FUNCTION, keep their enumeration order.
+  // Converts a descriptor of any other type to a real field, backed by the
+  // properties array.
   MUST_USE_RESULT MaybeObject* ConvertDescriptorToField(
       String* name,
       Object* new_value,
       PropertyAttributes attributes);
 
   // Add a property to a fast-case object.
   MUST_USE_RESULT MaybeObject* AddFastProperty(
       String* name,
       Object* value,
       PropertyAttributes attributes,
@@ skipping 2840 matching lines @@
 
   static bool IsValidElementsTransition(ElementsKind from_kind,
                                         ElementsKind to_kind);
 
   inline bool HasTransitionArray();
   inline bool HasElementsTransition();
   inline Map* elements_transition_map();
   MUST_USE_RESULT inline MaybeObject* set_elements_transition_map(
       Map* transitioned_map);
   inline TransitionArray* transitions();
-  MUST_USE_RESULT inline MaybeObject* AddTransition(String* key,
-                                                    Object* value);
+  inline void SetTransition(int index, Object* value);
+  MUST_USE_RESULT inline MaybeObject* AddTransition(String* key, Object* value);
   MUST_USE_RESULT inline MaybeObject* set_transitions(
       TransitionArray* transitions);
   inline void ClearTransitions(Heap* heap,
                                WriteBarrierMode mode = UPDATE_WRITE_BARRIER);
 
   // Tells whether the map is attached to SharedFunctionInfo
   // (for inobject slack tracking).
   inline void set_attached_to_shared_function_info(bool value);
 
   inline bool attached_to_shared_function_info();
@@ skipping 4059 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_