1  /* { dg-do compile } */ 
       2  /* { dg-options "-O2 -fdump-tree-fre1-details" } */
       3  int t(int a) __attribute__ ((const));
       4  void q (void);
       5  void
       6  threading(int a,int b)
       7  {
       8  	if (t(a))
       9  	{
      10  	  if (t(a))
      11  	    q();
      12  	}
      13  }
      14  /* We should thread the jump twice and eliminate it.  */
      15  /* { dg-final { scan-tree-dump-times "Replaced.* t " 1 "fre1"} } */