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PR-URL: https://github.com/nodejs/node/pull/28918 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>
25 lines
519 B
JavaScript
25 lines
519 B
JavaScript
// Copyright 2019 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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let o1 = { x: 999 };
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o1.y = 999;
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// o2 will share map with o1 in its initial state
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var o2 = { x: 1 };
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function f() {
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return o2.x;
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};
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%PrepareFunctionForOptimization(f);
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assertEquals(1, f());
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assertEquals(1, f());
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%OptimizeFunctionOnNextCall(f);
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assertEquals(1, f());
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delete o2.x;
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o2.x = 2;
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assertEquals(2, f());
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