RFR: 8308994: C2: Re-implement experimental post loop vectorization [v4]

[Pengfei Li]

On Mon, 3 Jul 2023 14:44:22 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> Good catch! What do you think of getting rid of `_slp` completely in `SWPointer` refactoring?
>
> I think that would be optimal, if it is possible. I would maybe call it a `CLPointer`, for counted-loop-pointer? And only have a reference to the `_lpt` / `cl`. Eventually, we may want to even allow non-conted-loops, but that is really for the future.

Done in SWPointer refactoring patch

>> Exactly! I have tried supporting some basic strided accesses. The code is not included in this patch as it's not that beneficial on some CPUs and requires more C2 refactorings.
>
> Great, you should probably leave that to a future RFE anyway.

I close this comment as the feature will not be included in this patch.

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/14581#discussion_r1338274345
PR Review Comment: https://git.openjdk.org/jdk/pull/14581#discussion_r1338281001