1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-original" } */
       3  
       4  int foo (int i)
       5  {
       6    return (i + 2) - (i + 1);
       7  }
       8  int bar (int i)
       9  {
      10    return (i + 2) + ~i;
      11  }
      12  
      13  /* { dg-final { scan-tree-dump-times "return 1;" 2 "original" } } */