Version 2.3.6

src/string.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 159 matching lines @@
 // ECMA-262 section 15.5.4.10
 function StringMatch(regexp) {
   var subject = TO_STRING_INLINE(this);
   if (IS_REGEXP(regexp)) {
     if (!regexp.global) return regexp.exec(subject);
 
     var cache = regExpCache;
     var saveAnswer = false;
 
     if (%_ObjectEquals(cache.type, 'match') &&
-        %_ObjectEquals(cache.regExp, regexp) &&
+        %_IsRegExpEquivalent(cache.regExp, regexp) &&
         %_ObjectEquals(cache.subject, subject)) {
       if (cache.answerSaved) {
         return CloneDenseArray(cache.answer);
       } else {
         saveAnswer = true;
       }
     }
     %_Log('regexp', 'regexp-match,%0S,%1r', [subject, regexp]);
     // lastMatchInfo is defined in regexp.js.
     var result = %StringMatch(subject, regexp, lastMatchInfo);
@@ skipping 76 matching lines @@
   // suffix
   builder.addSpecialSlice(end, subject.length);
 
   return builder.generate();
 }
 
 
 // Helper function for regular expressions in String.prototype.replace.
 function StringReplaceRegExp(subject, regexp, replace) {
   var cache = regExpCache;
-  if (%_ObjectEquals(cache.regExp, regexp) &&
-      %_ObjectEquals(cache.type, 'replace') &&
+  if (%_ObjectEquals(cache.type, 'replace') &&
+      %_IsRegExpEquivalent(cache.regExp, regexp) &&
       %_ObjectEquals(cache.replaceString, replace) &&
       %_ObjectEquals(cache.subject, subject)) {
     return cache.answer;
   }
   replace = TO_STRING_INLINE(replace);
   var answer = %StringReplaceRegExpWithString(subject,
                                               regexp,
                                               replace,
                                               lastMatchInfo);
   cache.subject = subject;
@@ skipping 313 matching lines @@
 
     var result = %StringSplit(subject, separator, limit);
 
     return result;
   }
 
   var cache = regExpCache;
   var saveAnswer = false;
 
   if (%_ObjectEquals(cache.type, 'split') &&
-      %_ObjectEquals(cache.regExp, separator) &&
-      %_ObjectEquals(cache.subject, subject)) {
+      %_IsRegExpEquivalent(cache.regExp, separator) &&
+      %_ObjectEquals(cache.subject, subject) &&
+      %_ObjectEquals(cache.lastIndex, limit)) {
     if (cache.answerSaved) {
       return CloneDenseArray(cache.answer);
     } else {
       saveAnswer = true;
     }
   }
 
   cache.type = 'split';
   cache.regExp = separator;
   cache.subject = subject;
+  // Reuse lastIndex field for split limit when type is "split".
+  cache.lastIndex = limit;
 
   %_Log('regexp', 'regexp-split,%0S,%1r', [subject, separator]);
 
   if (length === 0) {
     cache.answerSaved = true;
     if (splitMatch(separator, subject, 0, 0) != null) {
       cache.answer = [];
       return [];
     }
     cache.answer = [subject];
@@ skipping 363 matching lines @@
     "small", StringSmall,
     "strike", StringStrike,
     "sub", StringSub,
     "sup", StringSup,
     "toJSON", StringToJSON
   ));
 }
 
 
 SetupString();