1  /* { dg-do compile } */
       2  /* { dg-additional-options "-ffast-math" } */
       3  /* { dg-additional-options "-mavx" { target { i?86-*-* x86_64-*-* } } } */
       4  
       5  void fn1(double **matrix, int column, int row, int n)
       6  {
       7    int k;
       8    for (k = 0; k < n; k++)
       9      if (matrix[row][k] != matrix[column][k])
      10        {
      11  	matrix[column][k] = -matrix[column][k];
      12  	matrix[row][k] = matrix[row][k] - matrix[column][k];
      13        }
      14  }