RFR: 8334431: C2 SuperWord: fix performance regression due to store-to-load-forwarding failures [v3]

[Emanuel Peter]

On Tue, 19 Nov 2024 15:08:47 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> @chhagedorn all `VPointer` are in fact memory-regions, and not just zero-length pointers. They have a `MemNode` which gives them a size. That is how we can compute the overlapping / aliasing queries with it...
>
> Actually, it is supposed to be a `VPointer`, but one where we can give some `iv_offset`, i.e. mutate the offset. But ok, I could rename it to `VMemoryRegion`, it would not hurt :)

done

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PR Review Comment: https://git.openjdk.org/jdk/pull/21521#discussion_r1848550495