Replace AddProperty by AddNamedProperty to speed up the common case

src/regexp.js

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file relies on the fact that the following declaration has been made
 // in runtime.js:
 // var $Object = global.Object;
 // var $Array = global.Array;
 
 var $RegExp = global.RegExp;
@@ skipping 363 matching lines @@
 // Used internally by replace regexp with function.
 // The array has the format of an "apply" argument for a replacement
 // function.
 var lastMatchInfoOverride = null;
 
 // -------------------------------------------------------------------
 
 function SetUpRegExp() {
   %CheckIsBootstrapping();
   %FunctionSetInstanceClassName($RegExp, 'RegExp');
-  %AddProperty($RegExp.prototype, 'constructor', $RegExp, DONT_ENUM);
+  %AddNamedProperty($RegExp.prototype, 'constructor', $RegExp, DONT_ENUM);
   %SetCode($RegExp, RegExpConstructor);
 
   InstallFunctions($RegExp.prototype, DONT_ENUM, $Array(
     "exec", RegExpExec,
     "test", RegExpTest,
     "toString", RegExpToString,
     "compile", RegExpCompileJS
   ));
 
   // The length of compile is 1 in SpiderMonkey.
@@ skipping 62 matching lines @@
 
   for (var i = 1; i < 10; ++i) {
     %DefineAccessorPropertyUnchecked($RegExp, '$' + i,
                                      RegExpMakeCaptureGetter(i), NoOpSetter,
                                      DONT_DELETE);
   }
   %ToFastProperties($RegExp);
 }
 
 SetUpRegExp();