The register allocator spends significant amounts of time on updating
the state of active and inactive live range sets. In many cases, no
update is needed. By precomputing when the next update is due during
state management, we can avoid unnecessary checks. This cuts the time
spent for managing queues in half.

Change-Id: I44074266bed2f09171872a829f115e61608b76c8
Reviewed-on: https://chromium-review.googlesource.com/c/1352308Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Stephan Herhut <herhut@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57990}