Removed IsTransitionType predicate.

src/objects-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 1973 matching lines @@
   Foreign* p = Foreign::cast(GetCallbacksObject(descriptor_number));
   return reinterpret_cast<AccessorDescriptor*>(p->foreign_address());
 }
 
 
 bool DescriptorArray::IsProperty(int descriptor_number) {
   return IsRealProperty(GetType(descriptor_number));
 }
 
 
-bool DescriptorArray::IsTransition(int descriptor_number) {
-  return IsTransitionType(GetType(descriptor_number));
+bool DescriptorArray::IsTransitionOnly(int descriptor_number) {
+  switch (GetType(descriptor_number)) {
+    case MAP_TRANSITION:
+    case CONSTANT_TRANSITION:
+    case ELEMENTS_TRANSITION:
+      return true;
+    case CALLBACKS: {
+      Object* value = GetValue(descriptor_number);
+      if (!value->IsAccessorPair()) return false;
+      AccessorPair* accessors = AccessorPair::cast(value);
+      return accessors->getter()->IsMap() && accessors->setter()->IsMap();
+    }
+    case NORMAL:
+    case FIELD:
+    case CONSTANT_FUNCTION:
+    case HANDLER:
+    case INTERCEPTOR:
+    case NULL_DESCRIPTOR:
+      return false;
+  }
+  UNREACHABLE();  // keep the compiler happy

[Jakob Kummerow, 2012/02/03 13:17:14]

nit: Leading capital letter and trailing period.

[Sven Panne, 2012/02/03 13:33:14]

Done.

+  return false;
 }
 
 
 bool DescriptorArray::IsNullDescriptor(int descriptor_number) {
   return GetType(descriptor_number) == NULL_DESCRIPTOR;
 }
 
 
 bool DescriptorArray::IsDontEnum(int descriptor_number) {
   return PropertyDetails(GetDetails(descriptor_number)).IsDontEnum();
@@ skipping 2878 matching lines @@
 #undef WRITE_INT_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_