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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>
30 lines
696 B
JavaScript
30 lines
696 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
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var b = false;
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var obj = {f: 1, g: 2};
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function setMutability() {
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if (b) Object.freeze(obj);
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}
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%NeverOptimizeFunction(setMutability);
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function setAndUseObject() {
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setMutability(obj);
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if (!Object.isFrozen(obj)) {
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var t = obj.f;
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obj.f = t * 2;
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}
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return obj.f;
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}
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%PrepareFunctionForOptimization(setAndUseObject);
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assertEquals(setAndUseObject(), 2);
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assertEquals(setAndUseObject(), 4);
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%OptimizeFunctionOnNextCall(setAndUseObject);
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b = true;
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assertEquals(setAndUseObject(), 4);
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