24 lines
524 B
JavaScript
24 lines
524 B
JavaScript
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// Copyright 2017 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax
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const A = class A extends Array {
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constructor() {
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super();
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this.y = 1;
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}
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}
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function foo(x) {
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var a = new A();
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if (x) return a.y;
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}
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assertEquals(undefined, foo(false));
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assertEquals(undefined, foo(false));
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%OptimizeFunctionOnNextCall(foo);
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assertEquals(undefined, foo(false));
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assertEquals(1, foo(true));
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