RFR: 8354477: C2 SuperWord: make use of memory edges more explicit

[Emanuel Peter]

On Fri, 18 Apr 2025 13:34:37 GMT, Roland Westrelin <roland at openjdk.org> wrote:

>> This is a small refactoring, to make it more explicit that the "additional dependencies" are memory dependencies.
>> 
>> This is also preparatory work for [JDK-8324751](https://bugs.openjdk.org/browse/JDK-8324751), where we have two memory edge categories: strong and weak.
>> 
>> I was able to pass around `vtn_dependencies` in fewer occasions, and also renamed it to `vtn_memory_dependencies`.
>
> Looks reasonable to me.

@rwestrel @vnkozlov thanks for the reviews!

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PR Comment: https://git.openjdk.org/jdk/pull/24613#issuecomment-2818245537