Optimize %IsConstructCall() on IA-32.

src/regexp-delay.js

 // Copyright 2006-2009 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 85 matching lines @@
     %IgnoreAttributesAndSetProperty(object, 'multiline', multiline);
     %IgnoreAttributesAndSetProperty(object, 'lastIndex', 0);
   }
 
   // Call internal function to compile the pattern.
   %RegExpCompile(object, pattern, flags);
 }
 
 
 function RegExpConstructor(pattern, flags) {
-  if (%IsConstructCall()) {
+  if (%_IsConstructCall()) {
     DoConstructRegExp(this, pattern, flags, true);
   } else {
     // RegExp : Called as function; see ECMA-262, section 15.10.3.1.
     if (IS_REGEXP(pattern) && IS_UNDEFINED(flags)) {
       return pattern;
     }
     return new $RegExp(pattern, flags);
   }
 }
 
@@ skipping 286 matching lines @@
   %DefineAccessor($RegExp, "$'", SETTER, NoOpSetter, DONT_ENUM | DONT_DELETE);
 
   for (var i = 1; i < 10; ++i) {
     %DefineAccessor($RegExp, '$' + i, GETTER, RegExpMakeCaptureGetter(i), DONT_DELETE);
     %DefineAccessor($RegExp, '$' + i, SETTER, NoOpSetter, DONT_DELETE);
   }
 }
 
 
 SetupRegExp();