unsigned long bad(int reg, unsigned long inWord)   {       union {           unsigned long word;           unsigned char byte[4];       } data;       data.word = inWord;       data.byte[reg] = 0;       return data.word;   }main(){  /* XXX This test could be generalized.  */  if (sizeof (long) != 4)    exit (0);  if (bad (0, 0xdeadbeef) == 0xdeadbeef)    abort ();  exit (0);}