[llvm] [LV][VPlan] Add initial support for CSA vectorization (PR #106560)

[Ramkumar Ramachandra via llvm-commits]

https://github.com/artagnon commented:

I did a closer inspection of the patch, and found mostly small things to fix. Otherwise, I'm a fan of the approach you've taken: the code is quite easy to understand, and there is little bloat. Thanks again for the patch, and I hope the other reviewers also have similar sentiments!

On a minor note, it might be helpful if you could locally enable CSA vectorization, and post the diff of the test changes somewhere, just to make sure we're doing the right thing.

https://github.com/llvm/llvm-project/pull/106560