1  /* PR 24255 */
       2  /* { dg-do run } */
       3  /* { dg-options "-O" } */
       4  
       5  extern void abort (void);
       6  
       7  union wait { int w_status; };
       8  
       9  typedef union
      10  {
      11    union wait *uptr;
      12    int *iptr;
      13  } WAIT_STATUS __attribute__ ((__transparent_union__));
      14  
      15  int status;
      16  union wait wstatus;
      17  
      18  void __attribute__((noinline))
      19  test1 (WAIT_STATUS s)
      20  {
      21    if (s.iptr != &status)
      22      abort ();
      23  }
      24  
      25  void __attribute__((noinline))
      26  test2 (WAIT_STATUS s)
      27  {
      28    if (s.uptr != &wstatus)
      29      abort ();
      30  }
      31  
      32  int main()
      33  {
      34    test1 (&status);
      35    test2 (&wstatus);
      36    return 0;
      37  }