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

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