globals ()
  %rdi <- copy 1;
  %rsi <- copy 2;
  %rdx <- copy 3;
  %rcx <- copy 4;
  %r8  <- copy 5;
  %r9  <- copy 6;
  add_eight_int(7, 8);

  %rdi <- copy %rax;
  observe_int();

  exit;
end