vect-62.c

来自「linux下编程用 编译软件」· C语言 代码 · 共 70 行

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

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

#define N 16

int main1 ()
{
  int i, j;
  int ib[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
  int ia[N][4][N+8];

  /* Multidimensional array. Aligned. The "inner" dimensions
     are invariant in the inner loop. Store. */
  for (i = 0; i < N; i++)
    {
      for (j = 0; j < N; j++)
        {
           ia[i][1][j+8] = ib[i];
        }
    }

  /* check results: */  
  for (i = 0; i < N; i++)
    {
      for (j = 0; j < N; j++)
        {
           if (ia[i][1][j+8] != ib[i])
              abort();
        }
    }

  /* Multidimensional array. Aligned. The "inner" dimensions
     are invariant in the inner loop. Vectorizable, but the
     vectorizer detects that everything is invariant and that
     the loop is better left untouched. (it should be optimized away). */
  for (i = 0; i < N; i++)
    {
      for (j = 0; j < N; j++)
        {
           ia[i][1][8] = ib[i];
        }
    }

  /* check results: */
  for (i = 0; i < N; i++)
    {
      for (j = 0; j < N; j++)
        {
           if (ia[i][1][8] != ib[i])
              abort();
        }
    }


  return 0;
}

int main (void)
{ 
  check_vect ();

  return main1 ();
}

/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
/* { dg-final { scan-tree-dump-times "Vectorizing an unaligned access" 0 "vect" } } */
/* { dg-final { cleanup-tree-dump "vect" } } */