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9d7cd9b864
PR-URL: https://github.com/nodejs/node/pull/54077 Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Richard Lau <rlau@redhat.com> Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com> Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
27 lines
1018 B
JavaScript
27 lines
1018 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
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function f(...args) {
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let arr1 = [ undefined, undefined, undefined ];
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%SimulateNewspaceFull();
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arr1[0] = args[0];
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// The following allocation will trigger a full GC, which will move the
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// argument passed to the function (because it was a young object).
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let arr2 = [ arr1 ];
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// Here we're accessing `args[0]` again. This might be load-eliminated with
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// the `args[0]` load from a few lines above, which has been moved by the GC
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// since then. This should be fine though, as the loaded value should be
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// marked as Tagged, which means that it shouldn't point to the stale value
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// but instead have been updated during GC.
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arr1[1] = args[0]
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return arr2;
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}
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%PrepareFunctionForOptimization(f);
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let expected = f({ x : 42 });
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%OptimizeFunctionOnNextCall(f);
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assertEquals(expected, f({x : 42}));
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