Free up 11 bits in fast-mode PropertyDetails by removing the enumeration-index.

src/property.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 46 matching lines @@
   }
 
   Name* GetKey() { return key_; }
   Object* GetValue() { return value_; }
   PropertyDetails GetDetails() { return details_; }
 
 #ifdef OBJECT_PRINT
   void Print(FILE* out);
 #endif
 
-  void SetEnumerationIndex(int index) {
-    details_ = PropertyDetails(details_.attributes(), details_.type(),
-                               details_.representation(), index);
-  }
-
   void SetSortedKeyIndex(int index) { details_ = details_.set_pointer(index); }
 
  private:
   Name* key_;
   Object* value_;
   PropertyDetails details_;
 
  protected:
   Descriptor() : details_(Smi::FromInt(0)) {}
 
   void Init(Name* key, Object* value, PropertyDetails details) {
     key_ = key;
     value_ = value;
     details_ = details;
   }
 
   Descriptor(Name* key, Object* value, PropertyDetails details)
       : key_(key),
         value_(value),
         details_(details) { }
 
   Descriptor(Name* key,
              Object* value,
              PropertyAttributes attributes,
              PropertyType type,
-             Representation representation,
-             int index)
+             Representation representation)
       : key_(key),
         value_(value),
-        details_(attributes, type, representation, index) { }
+        details_(attributes, type, representation) { }
 
   friend class DescriptorArray;
 };
 
 
 class FieldDescriptor: public Descriptor {
  public:
   FieldDescriptor(Name* key,
                   int field_index,
                   PropertyAttributes attributes,
-                  Representation representation,
-                  int index = 0)
+                  Representation representation)
       : Descriptor(key, Smi::FromInt(field_index), attributes,
-                   FIELD, representation, index) {}
+                   FIELD, representation) {}
 };
 
 
 class ConstantFunctionDescriptor: public Descriptor {
  public:
   ConstantFunctionDescriptor(Name* key,
                              JSFunction* function,
-                             PropertyAttributes attributes,
-                             int index)
-      : Descriptor(key, function, attributes,
-                   CONSTANT_FUNCTION, Representation::Tagged(), index) {}
+                             PropertyAttributes attributes)
+      : Descriptor(key, function, attributes, CONSTANT_FUNCTION,
+                   Representation::Tagged()) {}
 };
 
 
 class CallbacksDescriptor:  public Descriptor {
  public:
   CallbacksDescriptor(Name* key,
                       Object* foreign,
-                      PropertyAttributes attributes,
-                      int index = 0)
+                      PropertyAttributes attributes)
       : Descriptor(key, foreign, attributes, CALLBACKS,
-                   Representation::Tagged(), index) {}
+                   Representation::Tagged()) {}
 };
 
 
 // Holds a property index value distinguishing if it is a field index or an
 // index inside the object header.
 class PropertyIndex {
  public:
   static PropertyIndex NewFieldIndex(int index) {
     return PropertyIndex(index, false);
   }
@@ skipping 344 matching lines @@
   JSReceiver* holder_;
   int number_;
   bool cacheable_;
   PropertyDetails details_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_PROPERTY_H_