[builtins] Make Math.ceil, Math.trunc and Math.round optimizable.

test/mjsunit/math-floor-part2.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 20 matching lines @@
 
 function testFloor(expect, input) {
   var test = new Function('n',
                           '"' + (test_id++) + '";return Math.floor(n)');
   assertEquals(expect, test(input));
   assertEquals(expect, test(input));
   assertEquals(expect, test(input));
   %OptimizeFunctionOnNextCall(test);
   assertEquals(expect, test(input));
 
+  var test_double_input = new Function(
+      'n',
+      '"' + (test_id++) + '";return Math.floor(+n)');
+  assertEquals(expect, test_double_input(input));
+  assertEquals(expect, test_double_input(input));
+  assertEquals(expect, test_double_input(input));
+  %OptimizeFunctionOnNextCall(test_double_input);
+  assertEquals(expect, test_double_input(input));
+
   var test_double_output = new Function(
       'n',
       '"' + (test_id++) + '";return Math.floor(n) + -0.0');
   assertEquals(expect, test_double_output(input));
   assertEquals(expect, test_double_output(input));
   assertEquals(expect, test_double_output(input));
   %OptimizeFunctionOnNextCall(test_double_output);
   assertEquals(expect, test_double_output(input));
+
+  var test_via_ceil = new Function(
+      'n',
+      '"' + (test_id++) + '";return -Math.ceil(-n)');
+  assertEquals(expect, test_via_ceil(input));
+  assertEquals(expect, test_via_ceil(input));
+  assertEquals(expect, test_via_ceil(input));
+  %OptimizeFunctionOnNextCall(test_via_ceil);
+  assertEquals(expect, test_via_ceil(input));
+
+  if (input >= 0) {
+    var test_via_trunc = new Function(
+        'n',
+        '"' + (test_id++) + '";return Math.trunc(n)');
+    assertEquals(expect, test_via_trunc(input));
+    assertEquals(expect, test_via_trunc(input));
+    assertEquals(expect, test_via_trunc(input));
+    %OptimizeFunctionOnNextCall(test_via_trunc);
+    assertEquals(expect, test_via_trunc(input));
+  }
 }
 
 function zero() {
   var x = 0.5;
   return (function() { return x - 0.5; })();
 }
 
 function test() {
   // 2^30 is a smi boundary.
   var two_30 = 1 << 30;
@@ skipping 17 matching lines @@
   testFloor(-two_30 + 1, -two_30 + 1 + 0.1);
   testFloor(-two_30 + 1, -two_30 + 1 + 0.5);
   testFloor(-two_30 + 1, -two_30 + 1 + 0.7);
 }
 
 
 // Test in a loop to cover the custom IC and GC-related issues.
 for (var i = 0; i < 100; i++) {
   test();
 }