1  /* PR tree-optimization/68835 */
       2  /* { dg-do run { target int128 } } */
       3  /* { dg-options "-O2" } */
       4  
       5  __attribute__((noinline, noclone)) unsigned __int128
       6  foo (void)
       7  {
       8    unsigned __int128 x = (unsigned __int128) 0xffffffffffffffffULL;
       9    struct { unsigned __int128 a : 65; } w;
      10    w.a = x;
      11    w.a += x;
      12    return w.a;
      13  }
      14  
      15  int
      16  main ()
      17  {
      18    unsigned __int128 x = foo ();
      19    if ((unsigned long long) x != 0xfffffffffffffffeULL
      20        || (unsigned long long) (x >> 64) != 1)
      21      __builtin_abort ();
      22    return 0;
      23  }