| // 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. | |
| // Flags: --allow-natives-syntax | |
| function f(x) { | |
| return x === +x; | |
| }; | |
| %PrepareFunctionForOptimization(f); | |
| assertEquals(false, f(undefined)); | |
| assertEquals(false, f(undefined)); | |
| %OptimizeFunctionOnNextCall(f); | |
| assertEquals(false, f(undefined)); // Interestingly this fails right away. |