1  /* { dg-additional-options "-O1" } */
       2  
       3  struct list_head {
       4    struct list_head *next, *prev;
       5  };
       6  
       7  struct mbochs_dmabuf {
       8    /* [...snip...] */
       9    struct dma_buf *buf;
      10    /* [...snip...] */
      11    struct list_head next;
      12    /* [...snip...] */
      13  };
      14  
      15  void mbochs_close(struct list_head *dmabufs,
      16  		  struct mbochs_dmabuf *dmabuf,
      17  		  struct mbochs_dmabuf *tmp)
      18  {
      19    /* [...snip...] */
      20    while (&dmabuf->next != dmabufs)
      21      {
      22        dmabuf = tmp;
      23        tmp = ((struct mbochs_dmabuf *)((void *)(tmp->next.next) - __builtin_offsetof(struct mbochs_dmabuf, next)));
      24      }
      25  
      26    /* [...snip...] */
      27  }