RFR: 8343685: C2 SuperWord: refactor VPointer with MemPointer [v3]

[Emanuel Peter]

On Fri, 13 Dec 2024 13:07:32 GMT, Roland Westrelin <roland at openjdk.org> wrote:

>> Emanuel Peter has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 114 commits:
>> 
>>  - manual merge
>>  - fix printing
>>  - rename
>>  - fix up print
>>  - add TestEquivalentInvariants.java
>>  - improve documentation
>>  - hide parser via delegation
>>  - Merge branch 'master' into JDK-8343685-VPointer-MemPointer
>>  - make sort stable
>>  - some comment and naming improvements
>>  - ... and 104 more: https://git.openjdk.org/jdk/compare/31ceec7c...4b0504d0
>
> This is tricky to review but looks reasonable to me.

@rwestrel Do you intend to review this patch, or did you only place some drive-through comments?
Just asking so I know if I should ask someone else to review.

@chhagedorn @rwestrel @vnkozlov 
FYI: I created this "Overview" for all the SuperWord issues (Press [F] for fullscreen mode):
https://eme64.github.io/blog/2025/01/01/AutoVectorization-Status.html

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PR Comment: https://git.openjdk.org/jdk/pull/21926#issuecomment-2575264017