1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fdump-tree-optimized" } */
       3  
       4  struct GTeth_desc
       5  {
       6    unsigned ed_cmdsts;
       7  };
       8  struct GTeth_softc
       9  {
      10    struct GTeth_desc txq_desc[32];
      11  };
      12  
      13  void foo(struct GTeth_softc *sc)
      14  {
      15    /* Verify that we retain the volatileness on the
      16       store until after optimization.  */
      17    volatile struct GTeth_desc *p = &sc->txq_desc[0];
      18    p->ed_cmdsts = 0;
      19  }
      20  
      21  /* { dg-final { scan-tree-dump "{v}" "optimized" } } */