1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-forwprop1" } */
       3  
       4  /* We should be able to fold the comparison at least with the
       5     first forwprop pass, if not a ccp pass before.  */
       6  
       7  extern void link_error (void);
       8  void foo()
       9  {
      10    int i;
      11    char *p = (char *)&i;
      12    long *q = (long *)p;
      13    if (q == 0)
      14      link_error ();
      15  }
      16  
      17  /* { dg-final { scan-tree-dump-not "link_error" "forwprop1" } } */