17 lines
519 B
JavaScript
17 lines
519 B
JavaScript
|
// 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());
|