// Copyright 2015 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.

(function Module(stdlib, foreign, heap) {
  "use asm";
  // This is not valid asm.js, but should nevertheless work.
  var MEM = new Uint8ClampedArray(heap);
  function foo(  )  { MEM[0] ^=  1; }
  return {foo: foo};
})(this, {}, new ArrayBuffer(  ) ).foo();
