One less dependent load in InvokeBuiltin.

src/objects-inl.h

 // Copyright 2006-2008 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 2569 matching lines @@
 
 
 int JSFunction::NumberOfLiterals() {
   ASSERT(!IsBoilerplate());
   return literals()->length();
 }
 
 
 Object* JSBuiltinsObject::javascript_builtin(Builtins::JavaScript id) {
   ASSERT(0 <= id && id < kJSBuiltinsCount);
-  return READ_FIELD(this, kJSBuiltinsOffset + (id * kPointerSize));
+  return READ_FIELD(this, OffsetOfFunctionWithId(id));
 }
 
 
 void JSBuiltinsObject::set_javascript_builtin(Builtins::JavaScript id,
                                               Object* value) {
   ASSERT(0 <= id && id < kJSBuiltinsCount);
-  WRITE_FIELD(this, kJSBuiltinsOffset + (id * kPointerSize), value);
-  WRITE_BARRIER(this, kJSBuiltinsOffset + (id * kPointerSize));
+  WRITE_FIELD(this, OffsetOfFunctionWithId(id), value);
+  WRITE_BARRIER(this, OffsetOfFunctionWithId(id));
 }
 
 
+Code* JSBuiltinsObject::javascript_builtin_code(Builtins::JavaScript id) {
+  ASSERT(0 <= id && id < kJSBuiltinsCount);
+  return Code::cast(READ_FIELD(this, OffsetOfCodeWithId(id)));
+}
+
+
+void JSBuiltinsObject::set_javascript_builtin_code(Builtins::JavaScript id,
+                                                   Code* value) {
+  ASSERT(0 <= id && id < kJSBuiltinsCount);
+  WRITE_FIELD(this, OffsetOfCodeWithId(id), value);
+  ASSERT(!Heap::InNewSpace(value));
+}
+
+
 Address Proxy::proxy() {
   return AddressFrom<Address>(READ_INTPTR_FIELD(this, kProxyOffset));
 }
 
 
 void Proxy::set_proxy(Address value) {
   WRITE_INTPTR_FIELD(this, kProxyOffset, OffsetFrom(value));
 }
 
 
@@ skipping 484 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_