1  /* { dg-do compile } */
       2  
       3  int main()
       4  {
       5    if (__builtin_constant_p ()) /* { dg-error "too few arguments" } */
       6      return 0;
       7    if (__builtin_constant_p (5, 6)) /* { dg-error "too many arguments" } */
       8      return 1;
       9    return 0;
      10  }