1  /* { dg-options "-O2 -fdump-tree-optimized" } */
       2  _Bool
       3  foo (_Bool a)
       4  {
       5    int c = 1 - a;
       6    return c;
       7  }
       8  
       9  /* { dg-final { scan-tree-dump-times "1 - " 0 "optimized" } } */
      10  /* { dg-final { scan-tree-dump-times "~a" 1 "optimized" } } */
      11