1  /* PR rtl-optimization/23560 */
       2  
       3  struct rtattr
       4  {
       5    unsigned short rta_len;
       6    unsigned short rta_type;
       7  };
       8  
       9  __attribute__ ((noinline))
      10  int inet_check_attr (void *r, struct rtattr **rta)
      11  {
      12    int i;
      13  
      14    for (i = 1; i <= 14; i++)
      15      {
      16        struct rtattr *attr = rta[i - 1];
      17        if (attr)
      18  	{
      19  	  if (attr->rta_len - sizeof (struct rtattr) < 4)
      20  	    return -22;
      21  	  if (i != 9 && i != 8)
      22  	    rta[i - 1] = attr + 1;
      23  	}
      24      }
      25    return 0;
      26  }
      27  
      28  extern void abort (void);
      29  
      30  int
      31  main (void)
      32  {
      33    struct rtattr rt[2];
      34    struct rtattr *rta[14];
      35    int i;
      36  
      37    rt[0].rta_len = sizeof (struct rtattr) + 8;
      38    rt[0].rta_type = 0;
      39    rt[1] = rt[0];
      40    for (i = 0; i < 14; i++)
      41      rta[i] = &rt[0];
      42    if (inet_check_attr (0, rta) != 0)
      43      abort ();
      44    for (i = 0; i < 14; i++)
      45      if (rta[i] != &rt[i != 7 && i != 8])
      46        abort ();
      47    for (i = 0; i < 14; i++)
      48      rta[i] = &rt[0];
      49    rta[1] = 0;
      50    rt[1].rta_len -= 8;
      51    rta[5] = &rt[1];
      52    if (inet_check_attr (0, rta) != -22)
      53      abort ();
      54    for (i = 0; i < 14; i++)
      55      if (i == 1 && rta[i] != 0)
      56        abort ();
      57      else if (i != 1 && i <= 5 && rta[i] != &rt[1])
      58        abort ();
      59      else if (i > 5 && rta[i] != &rt[0])
      60        abort ();
      61    return 0;
      62  }