[crankshaft] Address the deoptimization loops of Math.floor, Math.round and Math.ceil.

test/mjsunit/regress/regress-crbug-476477-1.js

+// Copyright 2016 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.
+
+var obj = {
+  _leftTime: 12345678,
+  _divider: function() {
+      var s = Math.floor(this._leftTime / 3600);
+      var e = Math.floor(s / 24);
+      var i = s % 24;
+      return {
+            s: s,
+            e: e,
+            i: i,
+          }
+    }
+}
+
+for (var i = 0; i < 1000; i++) {
+  obj._divider();
+}