1  /* This used to ICE due to a backend problem on s390.  */
       2  
       3  /* { dg-do compile } */
       4  /* { dg-options "-O1 -mpacked-stack" } */
       5  
       6  typedef unsigned int __u32;
       7  typedef struct
       8  {
       9    volatile int counter;
      10  } __attribute__ ((aligned (4))) atomic_t;
      11  static __inline__ __attribute__ ((always_inline))
      12       void atomic_inc (volatile atomic_t * v)
      13  {
      14    (
      15      {
      16      typeof (v->counter) old_val, new_val;
      17    __asm__ __volatile__ (
      18  	"   l     %0,0(%3)\n" 
      19  	"0: lr    %1,%0\n" 
      20  	"   ar    %1,%4\n" 
      21  	"   cs    %0,%1,0(%3)\n" 
      22  	"   jl    0b": 
      23  	"=&d" (old_val), "=&d" (new_val), "=m" (((atomic_t *) (v))->counter): 
      24  	"a" (v), "d" (1), "m" (((atomic_t *) (v))->counter):
      25  	"cc", "memory");
      26      });
      27  }
      28  extern unsigned long volatile __attribute__ ((section (".data"))) jiffies;
      29  struct inet_peer
      30  {
      31    unsigned long dtime;
      32    atomic_t refcnt;
      33  };
      34  static volatile int peer_total;
      35  int inet_peer_threshold = 65536 + 128;
      36  int inet_peer_minttl = 120 * 100;
      37  int inet_peer_maxttl = 10 * 60 * 100;
      38  static int
      39  cleanup_once (unsigned long ttl)
      40  {
      41    struct inet_peer *p;
      42    if (p != ((void *) 0))
      43      {
      44        if (((
      45  	     {
      46  	     1;}
      47  	   ) && ((long) (jiffies) - (long) (p->dtime + ttl) < 0)))
      48  	{
      49  	  return -1;
      50  	}
      51        atomic_inc (&p->refcnt);
      52      }
      53  }
      54  struct inet_peer *
      55  inet_getpeer (__u32 daddr, int create)
      56  {
      57    int i;
      58    int ttl;
      59    if (peer_total >= inet_peer_threshold)
      60      ttl = inet_peer_minttl;
      61    else
      62      ttl =
      63        inet_peer_maxttl - (inet_peer_maxttl -
      64  			  inet_peer_minttl) / 100 * peer_total /
      65        inet_peer_threshold * 100;
      66    for (i = 0; i < 30 && !cleanup_once (ttl); i++);
      67  }