gcc/testsuite/gcc.c-torture/execute/20050826-2.c

   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 }