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>
32 lines
1000 B
JavaScript
32 lines
1000 B
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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let n = 5;
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n = 2; // Making {n} not constant.
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function dematerialized_arguments_length() {
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let len = arguments.length;
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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 {len} will thus have no
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// use besides the frame state for this deopt).
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n + 5;
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return len;
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}
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return n + 2;
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}
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%PrepareFunctionForOptimization(dematerialized_arguments_length);
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n = 5;
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assertEquals(7, dematerialized_arguments_length(2, 3));
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assertEquals(7, dematerialized_arguments_length(2, 3, 4, 9));
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%OptimizeFunctionOnNextCall(dematerialized_arguments_length);
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assertEquals(7, dematerialized_arguments_length(2, 3));
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n = -1;
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assertEquals(4, dematerialized_arguments_length(2, 3, 4, 9));
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