gcc/testsuite/gcc.c-torture/compile/20020706-1.c

   1 // Contributed by Alexandre Oliva <aoliva@redhat.com>
   2 // From Red Hat case 106165.
   3
   4 typedef struct s1
   5 {
   6   unsigned short v1;
   7   unsigned char *v2;
   8 } S1;
   9
  10 extern void bar(const struct s1 *const hdb);
  11 extern unsigned char* foo ();
  12
  13 unsigned int sn;
  14 S1 *hdb;
  15 S1 *pb;
  16 unsigned short len;
  17
  18 unsigned int crashIt()
  19 {
  20   unsigned char *p;
  21   unsigned int nsn;
  22   unsigned short cnt;
  23
  24   if (sn != 0) return 1;
  25
  26   if ((len < 12) || ((p = (((pb->v1) >= 8) ? pb->v2 : foo() )) == 0))
  27     return 1;
  28
  29   nsn = (
  30          (((*(unsigned int*)p) & 0x000000ff) << 24) |
  31          (((*(unsigned int*)p) & 0x0000ff00) << 8)  |
  32          (((*(unsigned int*)p) & 0x00ff0000) >> 8)  |
  33          (((*(unsigned int*)p) & 0xff000000) >> 24)  );
  34   p += 4;
  35
  36   cnt = (unsigned short) ((
  37                            (((*(unsigned int*)p) & 0x000000ff) << 24) |
  38                            (((*(unsigned int*)p) & 0x0000ff00) << 8)  |
  39                            (((*(unsigned int*)p) & 0x00ff0000) >> 8)  |
  40                            (((*(unsigned int*)p) & 0xff000000) >> 24)  ) &
  41                           0xffff);
  42
  43   if ((len != 12 + (cnt * 56)) || (nsn == 0))
  44     {
  45       bar(hdb);
  46       return 1;
  47     }
  48
  49   return 0;
  50 }