30 lines
680 B
JavaScript
30 lines
680 B
JavaScript
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// Copyright 2020 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: --no-lazy-feedback-allocation
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function store(ar, index) {
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ar[index] = "a";
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}
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let growable_array = [];
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// Train IC on growable array
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store(growable_array, 0);
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store(growable_array, 1);
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store(growable_array, 2);
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store(growable_array, 3);
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// Now make IC polymorphic
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var array = [];
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Object.defineProperty(array, "length", { value: 3, writable: false });
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store(array, 0);
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store(array, 1);
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// ... and try to grow it.
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store(array, 3);
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assertEquals(undefined, array[3]);
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assertEquals(3, array.length);
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