20000804-1.c

this is a gcc file, you can download it and learn its usetility, for further detail please look at t

/* Copyright (C) 2000 Free Software Foundation */
__complex__ long long f ()
{
  int i[99];
  __complex__ long long v;

  v += f ();
  asm("": "+r" (v) : "r" (0), "r" (1));
  v = 2;
  return v;
  g (&v);
}