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

   1 /* Write a reduction loop to be reduced using vector shifts.  */
   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 unsigned char in[N] __attribute__((__aligned__(16)));
  14
  15 int
  16 main (unsigned char argc, char **argv)
  17 {
  18   unsigned char i = 0;
  19   unsigned char sum = 1;
  20   unsigned char expected = 1;
  21
  22   check_vect ();
  23
  24   for (i = 0; i < N; i++)
  25     {
  26       in[i] = (i + i + 1) & 0xfd;
  27       asm volatile ("" ::: "memory");
  28     }
  29
  30   for (i = 0; i < N; i++)
  31     {
  32       expected |= in[i];
  33       asm volatile ("" ::: "memory");
  34     }
  35
  36   for (i = 0; i < N; i++)
  37     sum |= in[i];
  38
  39   if (sum != expected)
  40     {
  41       __builtin_printf("Failed %d\n", sum);
  42       abort();
  43     }
  44
  45   return 0;
  46 }
  47
  48 /* { dg-final { scan-tree-dump "Reduce using vector shifts" "vect" { target { whole_vector_shift && { ! vect_logical_reduc } } } } } */
  49 /* { dg-final { scan-tree-dump "Reduce using direct vector reduction" "vect" { target vect_logical_reduc } } } */