RFR: 8368307: Shenandoah: get_next_bit_impl should special case weak and strong mark bits [v2]

[William Kemper]

On Fri, 26 Sep 2025 08:39:29 GMT, Kelvin Nilsen <kdnilsen at openjdk.org> wrote:

>> Check for weak bit or strong bit when giving special handling to the next bit found in first position of word.
>
> Kelvin Nilsen has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:
> 
>  - Fix up comment
>  - Merge remote-tracking branch 'jdk/master' into next-bit-may-be-weak
>  - check for weak bit or strong bit in first bit position

Marked as reviewed by wkemper (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/27476#pullrequestreview-3272694762