gcc/testsuite/gcc.dg/vect/slp-19c.c

/* { dg-require-effective-target vect_int } */

#include <stdarg.h>
#include "tree-vect.h"

#if VECTOR_BITS > 128
#define N (VECTOR_BITS * 2 / 32)
#else
#define N 16
#endif

int
main1 ()
{
  unsigned int i;
  unsigned int out[N*8];
#if N == 16
  unsigned int in[N*8] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63};
#else
  unsigned int in[N * 8];
  for (unsigned int i = 0; i < N * 8; ++i)
    {
      in[i] = i & 63;
      asm volatile ("" ::: "memory");
    }
#endif
  unsigned int ia[N*2], a0, a1, a2, a3;

  /* The last stmt requires interleaving of not power of 2 size - not
     vectorizable.  */
  for (i = 0; i < N/2; i++)
    {
      out[i*12] = in[i*12];
      out[i*12 + 1] = in[i*12 + 1];
      out[i*12 + 2] = in[i*12 + 2];
      out[i*12 + 3] = in[i*12 + 3];
      out[i*12 + 4] = in[i*12 + 4];
      out[i*12 + 5] = in[i*12 + 5];
      out[i*12 + 6] = in[i*12 + 6];
      out[i*12 + 7] = in[i*12 + 7];
      out[i*12 + 8] = in[i*12 + 8];
      out[i*12 + 9] = in[i*12 + 9];
      out[i*12 + 10] = in[i*12 + 10];
      out[i*12 + 11] = in[i*12 + 11];

      ia[i] = in[i*12 + 7];
    }

  /* check results:  */
  for (i = 0; i < N/2; i++)
    {
      if (out[i*12] !=  in[i*12]
         || out[i*12 + 1] != in[i*12 + 1]
         || out[i*12 + 2] != in[i*12 + 2]
         || out[i*12 + 3] != in[i*12 + 3]
         || out[i*12 + 4] != in[i*12 + 4]
         || out[i*12 + 5] != in[i*12 + 5]
         || out[i*12 + 6] != in[i*12 + 6]
         || out[i*12 + 7] != in[i*12 + 7]
         || out[i*12 + 8] != in[i*12 + 8]
         || out[i*12 + 9] != in[i*12 + 9]
         || out[i*12 + 10] != in[i*12 + 10]
         || out[i*12 + 11] != in[i*12 + 11]
         || ia[i] != in[i*12 + 7])
        abort ();
    }

  /* Hybrid SLP with unrolling by 2.  */
  for (i = 0; i < N; i++)
    {
      out[i*6] = in[i*6];
      out[i*6 + 1] = in[i*6 + 1];
      out[i*6 + 2] = in[i*6 + 2];
      out[i*6 + 3] = in[i*6 + 3];
      out[i*6 + 4] = in[i*6 + 4];
      out[i*6 + 5] = in[i*6 + 5];

      ia[i] = i;
    }

  /* check results:  */
  for (i = 0; i < N/2; i++)
    {
      if (out[i*6] !=  in[i*6]
         || out[i*6 + 1] != in[i*6 + 1]
         || out[i*6 + 2] != in[i*6 + 2]
         || out[i*6 + 3] != in[i*6 + 3]
         || out[i*6 + 4] != in[i*6 + 4]
         || out[i*6 + 5] != in[i*6 + 5]
         || ia[i] != i)
        abort ();
    }

  return 0;
}

int main (void)
{
  check_vect ();

  main1 ();

  return 0;
}

/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" } } */