v8/test/mjsunit/regress/regress-6607-1.js

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// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --allow-natives-syntax --opt
function get(a, i) {
return a[i];
}
%PrepareFunctionForOptimization(get);
get([1,,3], 0);
get([1,,3], 2);
%OptimizeFunctionOnNextCall(get);
get([1,,3], 0);
assertOptimized(get);
// This unrelated change to the Array.prototype should be fine.
Array.prototype.unrelated = 1;
assertOptimized(get);