gcc/testsuite/gcc.target/aarch64/vect-reduc-or_1.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -ftree-vectorize -fdump-tree-vect-all -fno-vect-cost-model" } */
   3 /* Write a reduction loop to be reduced using whole vector right shift.  */
   4
   5 #pragma GCC target "+nosve"
   6
   7 extern void abort (void);
   8
   9 unsigned char in[8] __attribute__((__aligned__(16)));
  10
  11 int
  12 main (unsigned char argc, char **argv)
  13 {
  14   unsigned char i = 0;
  15   unsigned char sum = 1;
  16
  17   for (i = 0; i < 8; i++)
  18     in[i] = (i + i + 1) & 0xfd;
  19
  20   /* Prevent constant propagation of the entire loop below.  */
  21   asm volatile ("" : : : "memory");
  22
  23   for (i = 0; i < 8; i++)
  24     sum |= in[i];
  25
  26   if (sum != 13)
  27     {
  28       __builtin_printf ("Failed %d\n", sum);
  29       abort ();
  30     }
  31
  32   return 0;
  33 }
  34
  35 /* { dg-final { scan-tree-dump "Reduce using vector shifts" "vect" } } */