In G1Analytics::compute_pause_time_ratio() there is this code:

  if (_recent_avg_pause_time_ratio < 0.0 ||
      (_recent_avg_pause_time_ratio - 1.0 > 0.0)) {
    // Clip ratio between 0.0 and 1.0, and continue. This will be fixed in
    // CR 6902692 by redoing the manner in which the ratio is incrementally computed.
    if (_recent_avg_pause_time_ratio < 0.0) {
      _recent_avg_pause_time_ratio = 0.0;
    } else {
      assert(_recent_avg_pause_time_ratio - 1.0 > 0.0, "Ctl-point invariant");
      _recent_avg_pause_time_ratio = 1.0;
    }
  }

that could be simplified using MIN/MAX methods or the clamp() method introduced by JDK-8233702