| // 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 Foo() {} |
| |
| // TurboFan will optimize this to false via constant-folding the |
| // OrdinaryHasInstance call inside Function.prototype[@@hasInstance]. |
| function foo() { return 1 instanceof Foo; } |
| |
| assertEquals(false, foo()); |
| assertEquals(false, foo()); |
| %OptimizeFunctionOnNextCall(foo); |
| assertEquals(false, foo()); |
