Introduce code flushing of RegExp code.

src/regexp.js

Index: src/regexp.js
===================================================================
--- src/regexp.js	(revision 8501)
+++ src/regexp.js	(working copy)
@@ -235,7 +235,7 @@
   // Conversion is required by the ES5 specification (RegExp.prototype.exec
   // algorithm, step 5) even if the value is discarded for non-global RegExps.
   var i = TO_INTEGER(lastIndex);
-  
+
   if (this.global) {
     if (i < 0 || i > string.length) {
       this.lastIndex = 0;
@@ -250,11 +250,11 @@
     }
     lastMatchInfoOverride = null;
     this.lastIndex = lastMatchInfo[CAPTURE1];
-    return true;    
+    return true;
   } else {
     // Non-global regexp.
-    // Remove irrelevant preceeding '.*' in a non-global test regexp. 
-    // The expression checks whether this.source starts with '.*' and 
+    // Remove irrelevant preceeding '.*' in a non-global 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 &&  // '*'
@@ -262,14 +262,14 @@
       if (!%_ObjectEquals(regexp_key, this)) {
         regexp_key = this;
         regexp_val = new $RegExp(SubString(this.source, 2, this.source.length),
-                                 (!this.ignoreCase 
+                                 (!this.ignoreCase
                                   ? !this.multiline ? "" : "m"
                                   : !this.multiline ? "i" : "im"));
       }
       if (%_RegExpExec(regexp_val, string, 0, lastMatchInfo) === null) {
         return false;
       }
-    }    
+    }
     %_Log('regexp', 'regexp-exec,%0r,%1S,%2i', [this, string, lastIndex]);
     // matchIndices is either null or the lastMatchInfo array.
     var matchIndices = %_RegExpExec(this, string, 0, lastMatchInfo);