1  /* { dg-options "-O2" } */
       2  /* { dg-do run } */
       3  
       4  struct S { int i; } s;
       5  
       6  void f (struct S *q)
       7  {
       8    int a, *p;
       9    p = &a;
      10    if (q)
      11      p = &q->i;
      12    *p = 1;
      13  }
      14  
      15  void abort (void);
      16  
      17  int main (void)
      18  {
      19    f (&s);
      20    if (s.i != 1)
      21      abort ();
      22    return 0;
      23  }