RFR: 8346664: C2: Optimize mask check with constant offset [v24]

[Tobias Hartmann]

On Mon, 17 Feb 2025 12:18:23 GMT, Matthias Ernst <duke at openjdk.org> wrote:

>> Matthias Ernst has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   incorporate @eme64's comment suggestions
>
> Super, glad this worked out! I want to return the compliment, thanks for sticking with me :-)

This caused a regression in CCP: [JDK-8350563](https://bugs.openjdk.org/browse/JDK-8350563) @mernst-github, could you please have a look? Thanks.

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PR Comment: https://git.openjdk.org/jdk/pull/22856#issuecomment-2677861258