35 lines
819 B
JavaScript
35 lines
819 B
JavaScript
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// Copyright 2019 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 --opt --no-always-opt
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function foo(a, i) {
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a[i] = 1;
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return a[i];
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}
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class MyArray extends (class C extends Array {
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}){};
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o = new MyArray;
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%PrepareFunctionForOptimization(foo);
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assertEquals(1, foo(o, 0));
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assertEquals(1, foo(o, 1));
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%OptimizeFunctionOnNextCall(foo);
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assertEquals(1, foo(o, 2));
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assertOptimized(foo);
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// Change prototype
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o.__proto__.__proto__ = new Int32Array(3);
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// Check it still works
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assertEquals(undefined, foo(o, 3));
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assertUnoptimized(foo);
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%PrepareFunctionForOptimization(foo);
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assertEquals(undefined, foo(o, 3));
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%OptimizeFunctionOnNextCall(foo);
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assertEquals(undefined, foo(o, 3));
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