1  /* { dg-options "-O2 -floop-nest-optimize" } */
       2  
       3  int m[1];
       4  
       5  void
       6  foo (double a[20][20], double b[20])
       7  {
       8    int i, j, k;
       9  
      10    for (i = 0; i < m[0]; ++i)
      11      for (j = 0; j < m[0]; ++j)
      12        a[i][j] = a[i][j] + 1;
      13  
      14    for (k = 0; k < 20; ++k)
      15      for (i = 0; i < m[0]; ++i)
      16        for (j = 0; j < m[0]; ++j)
      17  	b[i] = b[i] + a[i][j];
      18  }
      19