RFR: 8369167: C2: refactor LShiftINode/LShiftLNode Value/Identity/Ideal [v6]

[Emanuel Peter]

On Tue, 14 Oct 2025 11:59:27 GMT, Roland Westrelin <roland at openjdk.org> wrote:

>> This change refactor code that's similar for LShiftINode and
>> LShiftLNode into shared methods. I also added extra test cases to
>> cover all transformations.
>
> Roland Westrelin has updated the pull request incrementally with one additional commit since the last revision:
> 
>   review

Testing passed -> approved 🚀 

Thanks for the work @rwestrel !

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Marked as reviewed by epeter (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/27725#pullrequestreview-3343391826