gcc/testsuite/gcc.dg/tree-ssa/pr49094.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O" } */
   3
   4 struct in_addr {
   5         unsigned int s_addr;
   6 };
   7
   8 struct ip {
   9         unsigned char ip_p;
  10         unsigned short ip_sum;
  11         struct  in_addr ip_src,ip_dst;
  12 } __attribute__ ((aligned(1), packed));
  13
  14 struct ip ip_fw_fwd_addr;
  15
  16 int test_alignment( char *m )
  17 {
  18   struct ip *ip = (struct ip *) m;
  19   struct in_addr pkt_dst;
  20   pkt_dst = ip->ip_dst ;
  21   if( pkt_dst.s_addr == 0 )
  22     return 1;
  23   else
  24     return 0;
  25 }
  26
  27 int __attribute__ ((noinline, noclone))
  28 intermediary (char *p)
  29 {
  30   return test_alignment (p);
  31 }
  32
  33 int
  34 main (int argc, char *argv[])
  35 {
  36   ip_fw_fwd_addr.ip_dst.s_addr = 1;
  37   return intermediary ((void *) &ip_fw_fwd_addr);
  38 }