gcc/testsuite/gcc.dg/vect/vect-reduc-or_1.c

   1 /* { dg-do run { target { whole_vector_shift || vect_logical_reduc } } } */
   2
   3 /* Write a reduction loop to be reduced using vector shifts.  */
   4
   5 #include "tree-vect.h"
   6
   7 #if VECTOR_BITS > 128
   8 #define N (VECTOR_BITS / 8)
   9 #else
  10 #define N 16
  11 #endif
  12
  13 extern void abort(void);
  14
  15 unsigned char in[N] __attribute__((__aligned__(16)));
  16
  17 int
  18 main (unsigned char argc, char **argv)
  19 {
  20   unsigned char i = 0;
  21   unsigned char sum = 1;
  22   unsigned char expected = 1;
  23
  24   check_vect ();
  25
  26   for (i = 0; i < N; i++)
  27     {
  28       in[i] = (i + i + 1) & 0xfd;
  29       asm volatile ("" ::: "memory");
  30     }
  31
  32   for (i = 0; i < N; i++)
  33     {
  34       expected |= in[i];
  35       asm volatile ("" ::: "memory");
  36     }
  37
  38   for (i = 0; i < N; i++)
  39     sum |= in[i];
  40
  41   if (sum != expected)
  42     {
  43       __builtin_printf("Failed %d\n", sum);
  44       abort();
  45     }
  46
  47   return 0;
  48 }
  49
  50 /* { dg-final { scan-tree-dump "Reduce using vector shifts" "vect" { target { ! vect_logical_reduc } } } } */
  51 /* { dg-final { scan-tree-dump "Reduce using direct vector reduction" "vect" { target vect_logical_reduc } } } */