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PR-URL: https://github.com/nodejs/node/pull/28918 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com>
35 lines
668 B
JavaScript
35 lines
668 B
JavaScript
// Copyright 2016 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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var expected = undefined;
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function foo() {
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var a = [0, , {}];
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a.shift();
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assertEquals(expected, a[0]);
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};
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%PrepareFunctionForOptimization(foo);
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foo();
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foo();
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%OptimizeFunctionOnNextCall(foo);
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foo();
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expected = 42;
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Array.prototype[0] = 153;
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Array.prototype[1] = expected;
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foo();
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function bar() {
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var a = [0, , {}];
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a.shift();
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assertEquals(expected, a[0]);
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};
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%PrepareFunctionForOptimization(bar);
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bar();
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bar();
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%OptimizeFunctionOnNextCall(bar);
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bar();
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