gcc/testsuite/gcc.dg/vect/vect-reduc-or_2.c

   1 /* Write a reduction loop to be reduced using vector shifts and folded.  */
   2
   3 #include "tree-vect.h"
   4
   5 #if VECTOR_BITS > 128
   6 #define N (VECTOR_BITS / 8)
   7 #else
   8 #define N 16
   9 #endif
  10
  11 extern void abort(void);
  12
  13 int
  14 main (unsigned char argc, char **argv)
  15 {
  16   unsigned char in[N] __attribute__((aligned(16)));
  17   unsigned char i = 0;
  18   unsigned char sum = 1;
  19   unsigned char expected = 1;
  20
  21   check_vect ();
  22
  23   for (i = 0; i < N; i++)
  24     {
  25       in[i] = (i + i + 1) & 0xfd;
  26       asm volatile ("" ::: "memory");
  27     }
  28
  29   for (i = 0; i < N; i++)
  30     {
  31       expected |= in[i];
  32       asm volatile ("" ::: "memory");
  33     }
  34
  35   for (i = 0; i < N; i++)
  36     sum |= in[i];
  37
  38   if (sum != expected)
  39     {
  40       __builtin_printf("Failed %d\n", sum);
  41       abort();
  42     }
  43
  44   return 0;
  45 }
  46
  47 /* { dg-final { scan-tree-dump "Reduce using vector shifts" "vect" { target { whole_vector_shift && { ! vect_logical_reduc } } } } } */
  48 /* { dg-final { scan-tree-dump "Reduce using direct vector reduction" "vect" { target vect_logical_reduc } } } */