Harmony: optimize Math.clz32.

test/mjsunit/harmony/math-clz32.js

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --harmony-maths
+// Flags: --harmony-maths --allow-natives-syntax
 
 [NaN, Infinity, -Infinity, 0, -0, "abc", "Infinity", "-Infinity", {}].forEach(
   function(x) {
     assertEquals(32, Math.clz32(x));
   }
 );
 
 function testclz(x) {
   for (var i = 0; i < 33; i++) {
     if (x & 0x80000000) return i;
     x <<= 1;
   }
   return 32;
 }
 
-var max = Math.pow(2, 40);
-for (var x = 0; x < max; x = x * 1.01 + 1) {
-  assertEquals(testclz(x), Math.clz32(x));
-  assertEquals(testclz(-x), Math.clz32(-x));
-  assertEquals(testclz(x), Math.clz32({ valueOf: function() { return x; } }));
-  assertEquals(testclz(-x),
-               Math.clz32({ toString: function() { return -x; } }));
+
+function f(e) {
+  var max = Math.pow(2, e);
+  for (var x = 0; x < max; x = x * 1.01 + 1) {
+    assertEquals(testclz(x), Math.clz32(x));
+    assertEquals(testclz(-x), Math.clz32(-x));
+    assertEquals(testclz(x), Math.clz32({ valueOf: function() { return x; } }));
+    assertEquals(testclz(-x),
+                 Math.clz32({ toString: function() { return -x; } }));
+  }
 }
+
+f(5);
+f(5);
+%OptimizeFunctionOnNextCall(f);
+f(40);