gcc/testsuite/gcc.dg/vect/bb-slp-10.c

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

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

#define N 16 

unsigned int out[N];
unsigned int in[N] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15};

__attribute__ ((noinline)) int
main1 (unsigned int x, unsigned int y)
{
  int i;
  unsigned int *pin = &in[0];
  unsigned int *pout = &out[1];
  unsigned int a0, a1, a2, a3;

  /* Misaligned store.  */
  a0 = *pin++ + 23;
  a1 = *pin++ + 142;
  a2 = *pin++ + 2;
  a3 = *pin++ + 31;
  
  *pout++ = a0 * x;
  *pout++ = a1 * y;
  *pout++ = a2 * x;
  *pout++ = a3 * y;

  if (x)
    __asm__ volatile ("" : : : "memory");

  /* Check results.  */
  if (out[1] != (in[0] + 23) * x
      || out[2] != (in[1] + 142) * y
      || out[3] != (in[2] + 2) * x
      || out[4] != (in[3] + 31) * y)
    abort();

  return 0;
}

int main (void)
{
  check_vect ();

  main1 (2, 3);

  return 0;
}

/* { dg-final { scan-tree-dump "unsupported unaligned access" "slp2" { target { ! vect_element_align } } } } */
/* { dg-final { scan-tree-dump-times "optimized: basic block" 1 "slp2" { target vect_element_align } } } */