gcc/testsuite/gcc.dg/torture/pr50067-1.c

   1 /* { dg-do run } */
   2
   3 /* Make sure data-dependence analysis does not compute a bogus
   4    distance vector for the different sized accesses.  */
   5
   6 extern int memcmp(const void *, const void *, __SIZE_TYPE__);
   7 extern void abort (void);
   8 short a[32] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31 };
   9 short b[32] = { 4, 0, 5, 0, 6, 0, 7, 0, 8, 0, };
  10 int main()
  11 {
  12 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
  13   int i;
  14   if (sizeof (short) == 2)
  15     {
  16       for (i = 0; i < 32; ++i)
  17         (*((unsigned short(*)[32])&a[0]))[i] = (*((char(*)[32])&a[0]))[i+8];
  18       if (memcmp (&a, &b, sizeof (a)) != 0)
  19         abort ();
  20     }
  21 #endif
  22   return 0;
  23 }