1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-original" } */
       3  /* { dg-final { scan-tree-dump-times "return s \\^ x;" 4 "original" } } */
       4  
       5  int f1 (int x, int s)
       6  {
       7   return ~(~(x|s)|x)|~(~(x|s)|s);
       8  }
       9  
      10  int f2 (int x, int s)
      11  {
      12   return ~(~(~x&s)&~(x&~s));
      13  }
      14  
      15  int f3 (int x, int s)
      16  {
      17   return ~((x|~s)&(~x|s));
      18  }
      19  
      20  int f4 (int x, int s)
      21  {
      22   return (x|~s)^(~x|s);
      23  }