gcc/testsuite/gcc.dg/vect/vect-strided-a-u8-i2-gap.c

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

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

#define N 64 

typedef struct {
   unsigned char a;
   unsigned char b;
} s;

__attribute__ ((noinline)) int
main1 ()
{
  s arr[N];
  s *ptr = arr;
  s res[N];
  int i;

  for (i = 0; i < N; i++)
    {
      arr[i].a = i;
      arr[i].b = i * 2;
      asm volatile ("" ::: "memory");
    }

  for (i = 0; i < N; i++)
    {
      res[i].a = ptr->a;
      res[i].b = ptr->a;
      ptr++;
    }
  
  /* check results:  */
  for (i = 0; i < N; i++)
    {
      if (res[i].a != arr[i].a
          || res[i].b != arr[i].a)
	abort ();
    }

  ptr = arr;
  /* gap in store, use strided stores  */ 
  for (i = 0; i < N; i++)
    {
      res[i].a = ptr->b;
      ptr++;
    }

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


  return 0;
}

int main (void)
{
  check_vect ();

  main1 ();

  return 0;
}

/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect"  { target { vect_strided2 && { ! vect_hw_misalign } } } } } */
/* { dg-final { scan-tree-dump-times "vectorized 2 loops" 1 "vect"  { target { vect_strided2 && vect_hw_misalign } } } } */