Implement caching scheme for Date fields.

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 783 matching lines @@
 
 
 double Object::Number() {
   ASSERT(IsNumber());
   return IsSmi()
     ? static_cast<double>(reinterpret_cast<Smi*>(this)->value())
     : reinterpret_cast<HeapNumber*>(this)->value();
 }
 
 
+bool Object::IsNaN() {
+  return this->IsHeapNumber() && isnan(HeapNumber::cast(this)->value());
+}
+
+
 MaybeObject* Object::ToSmi() {
   if (IsSmi()) return this;
   if (IsHeapNumber()) {
     double value = HeapNumber::cast(this)->value();
     int int_value = FastD2I(value);
     if (value == FastI2D(int_value) && Smi::IsValid(int_value)) {
       return Smi::FromInt(int_value);
     }
   }
   return Failure::Exception();
@@ skipping 3302 matching lines @@
 
 
 JSValue* JSValue::cast(Object* obj) {
   ASSERT(obj->IsJSValue());
   ASSERT(HeapObject::cast(obj)->Size() == JSValue::kSize);
   return reinterpret_cast<JSValue*>(obj);
 }
 
 
 ACCESSORS(JSDate, value, Object, kValueOffset)
+ACCESSORS(JSDate, local, Object, kLocalOffset)
 ACCESSORS(JSDate, year, Object, kYearOffset)
 ACCESSORS(JSDate, month, Object, kMonthOffset)
 ACCESSORS(JSDate, day, Object, kDayOffset)
 ACCESSORS(JSDate, hour, Object, kHourOffset)
 ACCESSORS(JSDate, min, Object, kMinOffset)
 ACCESSORS(JSDate, sec, Object, kSecOffset)
-ACCESSORS(JSDate, ms, Object, kMsOffset)
+ACCESSORS(JSDate, weekday, Object, kWeekdayOffset)
 
 
 JSDate* JSDate::cast(Object* obj) {
   ASSERT(obj->IsJSDate());
   ASSERT(HeapObject::cast(obj)->Size() == JSDate::kSize);
   return reinterpret_cast<JSDate*>(obj);
 }
 
 
 ACCESSORS(JSMessageObject, type, String, kTypeOffset)
@@ skipping 802 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_