| // Copyright 2019 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 constructor() {} |
| const obj = Object.create(constructor.prototype); |
| |
| for (let i = 0; i < 1020; ++i) { |
| constructor.prototype["x" + i] = 42; |
| } |
| |
| function foo() { |
| return obj instanceof constructor; |
| }; |
| %PrepareFunctionForOptimization(foo); |
| assertTrue(foo()); |
| assertTrue(foo()); |
| %OptimizeFunctionOnNextCall(foo); |
| assertTrue(foo()); |
