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
839 B
JavaScript
33 lines
839 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 --maglev --no-always-turbofan
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function poly_store(a, x) {
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a[0] = x;
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};
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var y = new Array();
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y[0] = 1.1;
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y.x = 12;
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// We don't use {y}, but it prevents the map packed double map with `x` from
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// being GCed, which avoids {poly_store} from being deopted.
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%PrepareFunctionForOptimization(poly_store);
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poly_store([1.1], 'a');
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poly_store([1.1], 2.1);
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var x = new Array();
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x[0] = 1.1;
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x.x = 12;
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poly_store(x, 'a');
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%OptimizeMaglevOnNextCall(poly_store);
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var c = new Array();
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c[0] = 1.1;
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assertTrue(%HasDoubleElements(c));
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poly_store(c, 'a');
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assertTrue(%HasObjectElements(c));
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assertEquals(c[0], 'a');
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assertTrue(isMaglevved(poly_store));
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