RFR: 8372566: Genshen: crash at ShenandoahScanRemembered::process_clusters after JDK-8371667

[Xiaolong Peng]

On Fri, 28 Nov 2025 16:54:14 GMT, Xiaolong Peng <xpeng at openjdk.org> wrote:

>> Maybe a comment would be helpful.
>
> Yes, you are right.  With the refactor, the equivalent writing should be `req.type() == _alloc_shared_gc_old || req.type() == _alloc_shared_gc_promotion`, the new way is just  bit more cleaner and slightly more efficient.

May be I should change it `if(!req.is_lab_alloc())`, we don't even need to use the type directly here.

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PR Review Comment: https://git.openjdk.org/jdk/pull/28521#discussion_r2572158823