Optimize %IsConstructCall() on IA-32.

src/date-delay.js

 // Copyright 2006-2008 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 406 matching lines @@
 
 // ECMA 262 - 15.9.1.14
 function TimeClip(time) {
   if (!$isFinite(time)) return $NaN;
   if ($abs(time) > 8.64E15) return $NaN;
   return TO_INTEGER(time);
 }
 
 
 %SetCode($Date, function(year, month, date, hours, minutes, seconds, ms) {
-  if (%IsConstructCall()) {
+  if (%_IsConstructCall()) {
     // ECMA 262 - 15.9.3
     var argc = %_ArgumentsLength();
     if (argc == 0) {
       %_SetValueOf(this, %DateCurrentTime());
       return;
     }
     if (argc == 1) {
       // According to ECMA 262, no hint should be given for this
       // conversion.  However, ToPrimitive defaults to String Hint
       // for Date objects which will lose precision when the Date
@@ skipping 687 matching lines @@
     "toGMTString", DateToGMTString,
     "toUTCString", DateToUTCString,
     "getYear", DateGetYear,
     "setYear", DateSetYear,
     "toISOString", DateToISOString,
     "toJSON", DateToJSON
   ));
 }
 
 SetupDate();