RFR: 8369569: Rename methods in regmask.hpp to conform with HotSpot coding style [v2]

[Emanuel Peter]

On Fri, 17 Oct 2025 14:17:08 GMT, Daniel Lundén <dlunden at openjdk.org> wrote:

>> A number of methods in regmask.hpp do not conform with the HotSpot coding style. We should make sure they do.
>> 
>> ### Changeset
>> - Rename methods in `regmask.hpp` to conform with HotSpot coding style.
>> - Similarly rename directly related methods in `chaitin.hpp`.
>> - Rename the constant register masks `All` and `Empty` to `ALL` and `EMPTY`.
>> - Fix a few additional code style issues at lines touched by the changeset.
>> 
>> Note: this is a syntax-only changeset (no functional changes).
>> 
>> ### Testing
>> 
>> - [GitHub Actions](https://github.com/dlunde/jdk/actions/runs/18500704336)
>> - `tier1` and HotSpot parts of `tier2` and `tier3` (and additional Oracle-internal testing) on Windows x64, Linux x64, Linux aarch64, macOS x64, and macOS aarch64.
>
> Daniel Lundén has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Apply suggestions from code review
>   
>   Co-authored-by: Roberto Castañeda Lozano <robcasloz at users.noreply.github.com>

Marked as reviewed by epeter (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/27817#pullrequestreview-3355094444