// Expectation for test: 
// foo(x, list) {
//   var sum = 0;
//   for (int k = 0; k < 10; k++) {
//     // Everything can be hoisted out up to the index access which is
//     // blocked by the bounds check.
//     var a = x.left.left;
//     var b = x.left.right;
//     var c = x.right.left;
//     var d = x.right.right;
//     var i = a.value + c.value;
//     var j = b.value + d.value;
//     var z = list[i * j] + i;
//     sum += z;
//   }
//   return sum;
// }
// // Use a different class for each level in the tree, so type inference
// // is not confused.
// class Root {
//   Branch left, right;
//   Root(this.left, this.right);
// }
// class Branch {
//   Leaf left, right;
//   Branch(this.left, this.right);
// }
// class Leaf {
//   int value;
//   Leaf(this.value);
// }
// main() {
//   var x1 = new Leaf(1);
//   var x2 = new Leaf(10);
//   var x3 = new Leaf(20);
//   var x4 = new Leaf(-10);
//   var y1 = new Branch(x1, x2);
//   var y2 = new Branch(x3, x4);
//   var z  = new Root(y1, y2);
//   print(foo(z, [1,2,3,4,5,6,7,8,9,10]));
// }

function() {
  var v0 = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10], i = 1 + 20, v1 = i * (10 + -10), sum = 0, k = 0, line;
  for (; k < 10; sum += i + v0[v1], ++k)
    if (v1 < 0 || v1 >= 10)
      return H.ioore(v0, v1);
  line = sum === 0 ? 1 / sum < 0 ? "-0.0" : "" + sum : "" + sum;
  if (typeof dartPrint == "function")
    dartPrint(line);
  else if (typeof console == "object" && typeof console.log != "undefined")
    console.log(line);
  else if (!(typeof window == "object")) {
    if (!(typeof print == "function"))
      throw "Unable to print message: " + String(line);
    print(line);
  }
}