external printf

globals (x)
  l11: jumpif lt 1, 0 -> l17, l20;
  l17: %rdi <- copy "lt\n";
  l18: printf();
  l19: exit;
  l20: %rdi <- copy "not lt\n";
  l21: %rax <- copy 0;
  l22: printf();
  l23: exit;
end