1  /* PR tree-optimization/108068 */
       2  /* { dg-do run } */
       3  /* { dg-options "-O2" } */
       4  
       5  int
       6  main ()
       7  {
       8    _Decimal64 x = -1;
       9    while (x != 0)
      10      x /= 10;
      11    double d = x;
      12    if (!__builtin_signbit (d))
      13      __builtin_abort ();
      14  }