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// Copyright 2018 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
const r = /x/;
let counter = 0;
r.exec = () => { counter++; return null; }
function f() {
r.test("ABcd");
}
%PrepareFunctionForOptimization(f);
f();
assertEquals(1, counter);
%OptimizeFunctionOnNextCall(f);
f();
assertEquals(2, counter);
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