// 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 --expose-gc --turbo-inline-array-builtins

(function() {
var result = 0;
var proto_set_func = function(p, s) {
  %NeverOptimizeFunction(proto_set_func);
  if (s) {
    p[0] = 1;
  }
};
var f = function(s) {
  var b = [
    ,
    ,
  ];
  b[1] = 0;
  b[2] = 2;
  var sum = function(v, i, o) {
    if (i == 1) proto_set_func(b.__proto__, s);
    result += v;
  };
  b.forEach(sum);
};
;
%PrepareFunctionForOptimization(f);
f();
f();
%OptimizeFunctionOnNextCall(f);
f();
f(true);
f();
assertEquals(11, result);
})();