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>
26 lines
768 B
JavaScript
26 lines
768 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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function foo(b) {
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let arr = [0.5, 1.5, /* hole */, 2.5];
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// Turboshaft's Late Load Elimination will replace the following load by a NaN
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// hole constant.
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let val = arr[2];
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if (b) {
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// The NaN-hole constant will flow into the frame state here.
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%DeoptimizeNow();
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}
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// After deopt, {val} should be undefined rather than NaN.
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return val;
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}
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%PrepareFunctionForOptimization(foo);
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assertEquals(undefined, foo(false));
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%OptimizeFunctionOnNextCall(foo);
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assertEquals(undefined, foo(false));
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assertEquals(undefined, foo(true));
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