7772a2df9dPR-URL: https://github.com/nodejs/node/pull/59805 Reviewed-By: Filip Skokan <panva.ip@gmail.com> Reviewed-By: Richard Lau <richard.lau@ibm.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
41 lines
1,008 B
JavaScript
41 lines
1,008 B
JavaScript
// Copyright 2025 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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// Flags: --no-always-sparkplug --no-stress-maglev
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function allocateArray() {
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return [1, 2, 3];
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}
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%PrepareFunctionForOptimization(allocateArray);
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let a1 = allocateArray();
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a1[0] = 0.5;
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let a2 = allocateArray();
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// Check whether the configuration supports mementos.
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let hasMementos = %HasDoubleElements(a2);
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function accessArray(a) {
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return a[0];
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}
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%PrepareFunctionForOptimization(accessArray);
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let doubleArray = [1.5, 2.5, 3.5];
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let smiArray = [1, 2, 3];
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// Make the feedback polymorphic (PACKED_DOUBLE_ELEMENTS, PACKED_SMI_ELEMENTS).
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accessArray(doubleArray);
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accessArray(smiArray);
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let smiArray2 = [4, 5, 6];
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assertTrue(%HasSmiElements(smiArray2));
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accessArray(smiArray2);
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if (hasMementos) {
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// Loading the element updated the elements kind.
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assertTrue(%HasDoubleElements(smiArray2));
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}
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