918fe04351
PR-URL: https://github.com/nodejs/node/pull/58070 Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: Darshan Sen <raisinten@gmail.com> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com> Reviewed-By: Rafael Gonzaga <rafael.nunu@hotmail.com>
33 lines
1.0 KiB
JavaScript
33 lines
1.0 KiB
JavaScript
// Copyright 2024 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 --turbolev --turbofan
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function dematerialized_duplicated(n) {
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let o1 = { x : 42 };
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let o2 = { x : o1, y : o1, z : undefined };
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o2.z = o2;
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if (n < 0) {
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// We won't execute this code when collecting feedback, which means that
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// Maglev will do an unconditional deopt here (and {o1} and {o2} will thus
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// have no use besides the frame state for this deopt).
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n + 5;
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return [ o1, o2 ];
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}
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return n + 2;
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}
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%PrepareFunctionForOptimization(dematerialized_duplicated);
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assertEquals(7, dematerialized_duplicated(5));
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assertEquals(7, dematerialized_duplicated(5));
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%OptimizeFunctionOnNextCall(dematerialized_duplicated);
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assertEquals(7, dematerialized_duplicated(5));
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let [o1, o2] = dematerialized_duplicated(-1);
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assertSame(o1, o2.x);
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assertSame(o1, o2.y);
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assertSame(o2.x, o2.y);
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assertSame(o2, o2.z);
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