gcc/testsuite/gcc.dg/vect/vect-15.c

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

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

#define N 16

__attribute__ ((noinline))
int main1 ()
{
  int i;
  int a[N];
  int b[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};

  /* Not vectorizable yet (reverse access and forward access).  */
  for (i = N; i > 0; i--)
    {
      a[N-i] = b[i-1];
    }

  /* check results:  */
  for (i = 0; i <N; i++)
    {
      if (a[i] != b[N-1-i])
        abort ();
    }

  return 0;
}

int main (void)
{ 
  check_vect();
  
  return main1 ();
}

/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { vect_perm && vect_hw_misalign } } } } */