RFR: 8363943: ARM32: Represent Registers as values [v2]

[Aleksey Shipilev]

On Tue, 11 Nov 2025 22:09:24 GMT, Ivan <duke at openjdk.org> wrote:

>> Migrate away from pointer-based representation of Register values.
>> 
>> It improves compile-time checking by forbidding implicit conversions between integrals and pointers.
>> 
>> [JDK-8363943](https://bugs.openjdk.org/browse/JDK-8363943)
>
> Ivan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Proposed review changes were applied

Looks fine to me, but ultimately @bulasevich should make the call.

What kind of testing did you do?

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Marked as reviewed by shade (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26525#pullrequestreview-3454934124