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f579e11940
PR-URL: https://github.com/nodejs/node/pull/26685 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Michaël Zasso <targos@protonmail.com> Reviewed-By: Refael Ackermann <refack@gmail.com>
22 lines
561 B
JavaScript
22 lines
561 B
JavaScript
// 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 --opt
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// Ensure that we properly check for properties on the prototypes.
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function foo(o) {
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var s = "";
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for (var i in o) s += i;
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return s;
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}
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var a = [];
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%PrepareFunctionForOptimization(foo);
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assertEquals("", foo(a));
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assertEquals("", foo(a));
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%OptimizeFunctionOnNextCall(foo);
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assertEquals("", foo(a));
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Array.prototype.x = 4;
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assertEquals("x", foo(a));
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