Version 2.3.6

src/regexp.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 108 matching lines @@
   if (result !== null) lastMatchInfoOverride = null;
   return result;
 }
 
 
 function RegExpCache() {
   this.type = 'none';
   this.regExp = 0;
   this.subject = 0;
   this.replaceString = 0;
-  this.lastIndex = 0;
+  this.lastIndex = 0;  // Also used for splitLimit when type is "split"
   this.answer = 0;
   // answerSaved marks whether the contents of answer is valid for a cache
   // hit in RegExpExec, StringMatch and StringSplit.
   this.answerSaved = false;
 }
 
 
 var regExpCache = new RegExpCache();
 
 
@@ skipping 47 matching lines @@
   if (!IS_REGEXP(this)) {
     throw MakeTypeError('incompatible_method_receiver',
                         ['RegExp.prototype.exec', this]);
   }
 
   var cache = regExpCache;
   var saveAnswer = false;
 
   if (%_ObjectEquals(cache.type, 'exec') &&
       %_ObjectEquals(cache.lastIndex, this.lastIndex) &&
-      %_ObjectEquals(cache.regExp, this) &&
+      %_IsRegExpEquivalent(cache.regExp, this) &&
       %_ObjectEquals(cache.subject, string)) {
     if (cache.answerSaved) {
       return CloneRegExpResult(cache.answer);
     } else {
       saveAnswer = true;
     }
   }
 
   if (%_ArgumentsLength() == 0) {
     var regExpInput = LAST_INPUT(lastMatchInfo);
@@ skipping 75 matching lines @@
   var s;
   if (IS_STRING(string)) {
     s = string;
   } else {
     s = ToString(string);
   }
 
   var lastIndex = this.lastIndex;
   var cache = regExpCache;
   if (%_ObjectEquals(cache.type, 'test') &&
-      %_ObjectEquals(cache.regExp, this) &&
+      %_IsRegExpEquivalent(cache.regExp, this) &&
       %_ObjectEquals(cache.subject, string) &&
       %_ObjectEquals(cache.lastIndex, lastIndex)) {
     return cache.answer;
   }
 
   // Remove irrelevant preceeding '.*' in a test regexp. The expression
   // checks whether this.source starts with '.*' and that the third
   // char is not a '?'
   if (%_StringCharCodeAt(this.source,0) == 46 && // '.'
       %_StringCharCodeAt(this.source,1) == 42 && // '*'
@@ skipping 236 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();