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 extern void abort (void);
   6
   7 unsigned char in[8] __attribute__((__aligned__(16)));
   8
   9 int
  10 main (unsigned char argc, char **argv)
  11 {
  12   unsigned char i = 0;
  13   unsigned char sum = 1;
  14
  15   for (i = 0; i < 8; i++)
  16     in[i] = (i + i + 1) & 0xfd;
  17
  18   /* Prevent constant propagation of the entire loop below.  */
  19   asm volatile ("" : : : "memory");
  20
  21   for (i = 0; i < 8; i++)
  22     sum |= in[i];
  23
  24   if (sum != 13)
  25     {
  26       __builtin_printf ("Failed %d\n", sum);
  27       abort ();
  28     }
  29
  30   return 0;
  31 }
  32
  33 /* { dg-final { scan-tree-dump "Reduce using vector shifts" "vect" } } */