Removed transitions from the accessor pair descriptors.

src/transitions-inl.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 120 matching lines @@
   return String::cast(get(ToKeyIndex(transition_number)));
 }
 
 
 void TransitionArray::SetKey(int transition_number, String* key) {
   ASSERT(transition_number < number_of_transitions());
   set(ToKeyIndex(transition_number), key);
 }
 
 
-Object* TransitionArray::GetValue(int transition_number) {
+Map* TransitionArray::GetTarget(int transition_number) {
   ASSERT(transition_number < number_of_transitions());
-  return get(ToValueIndex(transition_number));
+  return Map::cast(get(ToTargetIndex(transition_number)));
 }
 
 
-Object** TransitionArray::GetValueSlot(int transition_number) {
+Object** TransitionArray::GetTargetSlot(int transition_number) {
   ASSERT(transition_number < number_of_transitions());
   return HeapObject::RawField(
       reinterpret_cast<HeapObject*>(this),
-      OffsetOfElementAt(ToValueIndex(transition_number)));
+      OffsetOfElementAt(ToTargetIndex(transition_number)));
 }
 
 
-void TransitionArray::SetValue(int transition_number, Object* value) {
+void TransitionArray::SetTarget(int transition_number, Map* value) {
   ASSERT(transition_number < number_of_transitions());
-  set(ToValueIndex(transition_number), value);
-}
-
-
-Map* TransitionArray::GetTargetMap(int transition_number) {
-  Object* value = GetValue(transition_number);
-  if (value->IsAccessorPair()) {
-    // TODO(verwaest): Currently details are always taken from the getter if it
-    // is a transition, otherwise from the setter which in that case has to be a
-    // transition. Details should be dependent on which component is requested.
-    AccessorPair* accessors = AccessorPair::cast(value);
-    if (accessors->getter()->IsMap()) {
-      return Map::cast(accessors->getter());
-    }
-    return Map::cast(accessors->setter());
-  }
-  return Map::cast(value);
+  set(ToTargetIndex(transition_number), value);
 }
 
 
 PropertyDetails TransitionArray::GetTargetDetails(int transition_number) {
-  Map* map = GetTargetMap(transition_number);
+  Map* map = GetTarget(transition_number);
   DescriptorArray* descriptors = map->instance_descriptors();
   int descriptor = descriptors->LastAdded();
   ASSERT(descriptor != DescriptorArray::kNotFound);
   return descriptors->GetDetails(descriptor);
 }
 
 
 Object** TransitionArray::GetElementsTransitionSlot() {
   return HeapObject::RawField(reinterpret_cast<HeapObject*>(this),
                               kElementsTransitionOffset);
 }
 
 
 int TransitionArray::Search(String* name) {
   return internal::Search(this, name);
 }
 
 
 void TransitionArray::Set(int transition_number,
                           String* key,
-                          Object* value,
+                          Map* target,
                           const WhitenessWitness&) {
   NoIncrementalWriteBarrierSet(this,
                                ToKeyIndex(transition_number),
                                key);
   NoIncrementalWriteBarrierSet(this,
-                               ToValueIndex(transition_number),
-                               value);
+                               ToTargetIndex(transition_number),
+                               target);
 }
 
 
 #undef FIELD_ADDR
 #undef WRITE_FIELD
 #undef CONDITIONAL_WRITE_BARRIER
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TRANSITIONS_INL_H_