1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fdump-tree-forwprop1" }  */
       3  
       4  _Bool
       5  foo (_Bool a, _Bool b, _Bool c)
       6  {
       7    _Bool r1 = a == 0 & b != 0;
       8    _Bool r2 = b != 0 & c == 0;
       9    return (r1 == 0 & r2 == 0);
      10  }
      11  
      12  /* { dg-final { scan-tree-dump-times " == " 0 "forwprop1" } } */
      13  /* { dg-final { scan-tree-dump-times " != " 0 "forwprop1" } } */