Integrated: 8310680: GenShen: In-place region promotions may fail

[William Kemper]

On Thu, 22 Jun 2023 22:58:38 GMT, William Kemper <wkemper at openjdk.org> wrote:

> There are a few small changes here:
> * In `op-update-refs-final`, only active regions are aged.
> * In `op-final-roots`, a region's age may be reset outside of an aging cycle.
> * When the field used to save `top` before promotion is set, it indicates the region has been chosen for in-place-promotion.

This pull request has now been integrated.

Changeset: d376bed2
Author:    William Kemper <wkemper at openjdk.org>
URL:       https://git.openjdk.org/shenandoah/commit/d376bed29bed037d5bfd436f667512a1b0088dee
Stats:     50 lines in 5 files changed: 32 ins; 7 del; 11 mod

8310680: GenShen: In-place region promotions may fail

Reviewed-by: kdnilsen, ysr

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PR: https://git.openjdk.org/shenandoah/pull/290