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/* { dg-do compile } */

/* { dg-options "-O2 -ftree-loop-distribution -fdump-tree-ldist-all" } */

void foo (int * __restrict__ ia,

          int * __restrict__ ib,

          int * __restrict__ oxa,

          int * __restrict__ oxb,

          int * __restrict__ oya,

          int * __restrict__ oyb)

{

  int i;

  long int mya[52];

  long int myb[52];

  for (i=0; i < 52; i++)

    {

      mya[i] = ia[i] * oxa[i] + ib[i] * oxb[i];

      myb[i] = -ia[i] * oxb[i] + ib[i] * oxa[i];

      oya[i] = mya[i] >> 10;

      oyb[i] = myb[i] >> 10;

    }

  /* This loop was distributed, but it is not anymore due to the cost

     model changes: the result of a distribution would look like this:

     |  for (i=0; i < 52; i++)

     |    oya[i] = ia[i] * oxa[i] + ib[i] * oxb[i] >> 10;

     |

     |  for (i=0; i < 52; i++)

     |    oyb[i] = -ia[i] * oxb[i] + ib[i] * oxa[i] >> 10;

     and in this the array IA is read in both tasks.  For maximizing

     the cache reuse, ldist does not distributes this loop anymore.

  */

}

/* { dg-final { scan-tree-dump-times "distributed: split to 2 loops" 0 "ldist" } } */

/* { dg-final { cleanup-tree-dump "ldist" } } */