```
  if (decr_tenuring_threshold && !(AlwaysTenure || NeverTenure)) {
    if (tenuring_threshold > 1) {
      tenuring_threshold--;
    }
  } else if (incr_tenuring_threshold && !(AlwaysTenure || NeverTenure)) {
    if (tenuring_threshold < MaxTenuringThreshold) {
      tenuring_threshold++;
    }
  }
```

The common expression, `!(AlwaysTenure || NeverTenure)`, can be extracted out to a higher level to simplify the flow.