// Copyright 2016 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 foo = (function() {
  'use asm';
  function foo() { ''[0]; }
  return foo;
})();

foo();
%OptimizeFunctionOnNextCall(foo);
foo();
