v8/test/mjsunit/regress/regress-6063.js

// 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

var U16 = new Uint16Array(2);
U16[0] = 0xffff;

function foo(a, i) {
  return U16[0] === 0xffff;
};
%PrepareFunctionForOptimization(foo);
assertTrue(foo());
assertTrue(foo());
%OptimizeFunctionOnNextCall(foo);
assertTrue(foo());