| // Copyright 2015 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 | |
| "use strict"; | |
| var B = class extends Int32Array {}; | |
| function f(b) { | |
| if (b) { | |
| null instanceof B; | |
| } | |
| }; | |
| %PrepareFunctionForOptimization(f); | |
| f(); | |
| f(); | |
| f(); | |
| %OptimizeFunctionOnNextCall(f); | |
| f(); | |
| function f2() { | |
| return new B(); | |
| }; | |
| %PrepareFunctionForOptimization(f2); | |
| %OptimizeFunctionOnNextCall(f2); | |
| f2(); |