RFR: 8325541: C2 SuperWord: refactor filter / split [v2]

[Emanuel Peter]

On Mon, 12 Feb 2024 08:44:56 GMT, Christian Hagedorn <chagedorn at openjdk.org> wrote:

>> [JDK-8325252](https://bugs.openjdk.org/browse/JDK-8325252) C2 SuperWord: refactor the packset
>
>> I can do that in a future RFE. I hope that the _packset and _my_pack eventually can become its own class. Then I can rename things everywhere.
> 
> Sounds good, that's even better. Do you still want to move the assertion code in this PR to `combine_packs()` or also do it separately?

I'll do it separately, i.e. in that RFE

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PR Review Comment: https://git.openjdk.org/jdk/pull/17785#discussion_r1486382627