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| 1 // Copyright 2016 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 // Flags: --allow-natives-syntax |
| 6 |
| 7 function Foo() {} |
| 8 |
| 9 // TurboFan will optimize this to false via constant-folding the |
| 10 // OrdinaryHasInstance call inside Function.prototype[@@hasInstance]. |
| 11 function foo() { return 1 instanceof Foo; } |
| 12 |
| 13 assertEquals(false, foo()); |
| 14 assertEquals(false, foo()); |
| 15 %OptimizeFunctionOnNextCall(foo); |
| 16 assertEquals(false, foo()); |
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