New class for Date objects: caches individual date components.

test/mjsunit/fuzz-natives.js

 // Copyright 2011 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 166 matching lines @@
   // Performance critical functions which cannot afford type checks.
   "_IsNativeOrStrictMode": true,
   "_CallFunction": true,
 
   // Tries to allocate based on argument, and (correctly) throws
   // out-of-memory if the request is too large. In practice, the
   // size will be the number of captures of a RegExp.
   "RegExpConstructResult": true,
   "_RegExpConstructResult": true,
 
-  // This function performs some checks compile time (it requires its first
-  // argument to be a compile time smi).
+  // This functions perform some checks compile time (they require one of their
+  // arguments to be a compile time smi).
+  "_DateField": true,
+  "_SetDateField": true,
   "_GetFromCache": true,
 
   // This function expects its first argument to be a non-smi.
   "_IsStringWrapperSafeForDefaultValueOf" : true,
 
   // Only applicable to strings.
   "_HasCachedArrayIndex": true,
   "_GetCachedArrayIndex": true
 };
 
@@ skipping 10 matching lines @@
     if (name in knownProblems || name in currentlyUncallable)
       continue;
     print(name);
     var argc = nativeInfo[1];
     testArgumentCount(name, argc);
     testArgumentTypes(name, argc);
   }
 }
 
 testNatives();