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Issue 1304633002: Correctify instanceof and make it optimizable. (Closed) Base URL: https://chromium.googlesource.com/v8/v8.git@master
Patch Set: Add arm64 port. Created 5 years, 4 months ago
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1 // Copyright 2015 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 function Bar() { }
6 function Baz() { }
7 Baz.prototype = { __proto__: new Bar() }
8 var x = new Baz();
9 function foo(y) { return y instanceof Bar; }
10 assertTrue(foo(x));
11 Baz.prototype.__proto__ = null;
12 assertFalse(foo(x));
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