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>
22 lines
748 B
JavaScript
22 lines
748 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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// Flags: --no-always-turbofan
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function check_number(x) {
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// With only number maps in the feedback, "+x" is a no-op and Maglev just
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// emits a CheckNumber.
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return +x;
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}
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%PrepareFunctionForOptimization(check_number);
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assertEquals(3.65, check_number(3.65));
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%OptimizeFunctionOnNextCall(check_number);
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assertEquals(3.65, check_number(3.65));
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assertOptimized(check_number);
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// CheckNumber should trigger a deopt for non-number maps (like strings).
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assertEquals(NaN, check_number("abc"));
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assertUnoptimized(check_number);
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