1  /* { dg-do run } */
       2  /* { dg-additional-options "-floop-interchange" } */
       3  
       4  int a[6][9];
       5  int main()
       6  {
       7    a[1][3] = 8;
       8    for (int b = 1; b <= 5; b++)
       9      for (int d = 0; d <= 5; d++)
      10  #pragma GCC unroll 0
      11        for (int c = 0; c <= 5; c++)
      12          a[b][c] = a[b][c + 2] & 216;
      13    for (int e = 0; e < 6; e++)
      14      for (int f = 0; f < 9; f++)
      15        if (a[e][f] != 0)
      16          __builtin_abort ();
      17    return 0;
      18  }