gcc/testsuite/gcc.dg/torture/pr50067-5.c

   1 /* { dg-do run } */
   2
   3 /* Verify we do not get a bogus access function pairs with
   4    exchanged dimensions, 0, {1, +, 1}_1 vs. {2B, +, 1}_1, 0 which
   5    disambiguates both accesses and leads to vectorization.  */
   6
   7 extern int memcmp(const void *, const void *, __SIZE_TYPE__);
   8 extern void abort (void);
   9 short a[33] = { 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 };
  10 short b[33] = { 0, };
  11 char * volatile ap_ = (char *)&a[0];
  12 int main()
  13 {
  14 #if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
  15   int i;
  16   char *ap = ap_;
  17   if (sizeof (short) == 2)
  18     {
  19       for (i = 0; i < 64; ++i)
  20         {
  21           (*((char(*)[])&ap[i+2]))[0] = (*((char(*)[])&ap[0]))[i+1];
  22         }
  23       if (memcmp (&a, &b, sizeof (a)) != 0)
  24         abort ();
  25     }
  26 #endif
  27   return 0;
  28 }