| // Copyright 2018 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 --opt |
| |
| /* Test deopt behaviors when the prototype has elements */ |
| |
| // lastIndexOf |
| |
| (function () { |
| var array = [,]; |
| |
| function lastIndexOf(val) { |
| return array.lastIndexOf(val); |
| } |
| |
| %PrepareFunctionForOptimization(lastIndexOf); |
| lastIndexOf(6); lastIndexOf(6); |
| |
| %OptimizeFunctionOnNextCall(lastIndexOf); |
| assertEquals(lastIndexOf(6), -1); |
| |
| array.__proto__.push(6); |
| // deopt |
| assertEquals(lastIndexOf(6), 0); |
| })(); |