RFR: 8342498: Add test for Allocation elimination after use as alignment reference by SuperWord [v2]

[Emanuel Peter]

On Mon, 4 Nov 2024 16:10:00 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> Emanuel Peter has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   unlock diagnostics
>
> Good.

Thanks @vnkozlov for the approval.
Thanks @TobiHartmann for the review and all the helpful suggestions along the way!

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PR Comment: https://git.openjdk.org/jdk/pull/21875#issuecomment-2456957356