RFR: 8296374: Check for young region in G1BarrierSet::invalidate instead of card-by-card check [v3]

[Ivan Walulya]

On Fri, 16 Dec 2022 11:17:40 GMT, Ivan Walulya <iwalulya at openjdk.org> wrote:

>> Hi,
>> 
>> Please review this change to young region card checks in G1BarrierSet::invalidate(). A single check should suffice because the MemRegion for invalidation in G1 is either completely in the young gen or not. 
>> 
>> Testing: Tier 1-3
>
> Ivan Walulya has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Thomas review

Thanks for the reviews.

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PR: https://git.openjdk.org/jdk/pull/11677