1  /* { dg-do compile } */
       2  /* { dg-options "-O -fdump-tree-forwprop1" } */
       3  
       4  struct A { int a[1]; };
       5  
       6  void f (struct A *p)
       7  {
       8    void *q = p->a;
       9    if (p != q)
      10      __builtin_abort ();
      11  }
      12  
      13  /* { dg-final { scan-tree-dump-not "abort" "forwprop1" } } */