gcc/testsuite/gcc.dg/vect/slp-perm-12.c

/* { dg-require-effective-target vect_int } */
/* { dg-require-effective-target vect_pack_trunc } */
/* { dg-additional-options "-msse4" { target { i?86-*-* x86_64-*-* } } } */

#include "tree-vect.h"

extern void abort (void);

unsigned char a[64];
short b[88];

void __attribute__((noinline))
test(unsigned char * __restrict__ dst, short * __restrict__ tptr)
{
  int i;
  for (i = 0; i < 8; i++)
    {
      dst[0] = (tptr[0] - tptr[0 + 3]);
      dst[1] = (tptr[1] - tptr[1 + 3]);
      dst[2] = (tptr[2] - tptr[2 + 3]);
      dst[3] = (tptr[3] - tptr[3 + 3]);
      dst[4] = (tptr[4] - tptr[4 + 3]);
      dst[5] = (tptr[5] - tptr[5 + 3]);
      dst[6] = (tptr[6] - tptr[6 + 3]);
      dst[7] = (tptr[7] - tptr[7 + 3]);
      dst += 8;
      tptr += 11;
    }
}

int main()
{
  int i;

  check_vect ();

  for (i = 0; i < 88; ++i)
    {
      b[i] = i;
      __asm__ volatile ("");
    }

  test (a, b);

  for (i = 0; i < 64; ++i)
    if (a[i] != 253)
      abort ();

  return 0;
}

/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" { target { vect_perm && vect_hw_misalign } } } } */