tests/compiler/dart2js/cps_ir/input/basic_3.dart

foo(a) {
  print(a);
  return a;
}
main() {
  var a = 10;
  var b = 1;
  var t;
  t = a;
  a = b;
  b = t;
  print(a);
  print(b);
  print(b);
  print(foo(a));
}