One less dependent load in InvokeBuiltin.

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index d363d4d6ab29847abca988e340afc65862e9eff2..a21a7358362f2a6793599bd77b8a7b1624173723 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -2587,15 +2587,29 @@ int JSFunction::NumberOfLiterals() {
 
 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));
 }