[llvm] [LV] Vectorize Epilogues for loops with small VF but high IC (PR #108190)

[Sjoerd Meijer via llvm-commits]

sjoerdmeijer wrote:

I have ran SPEC2017 INT + FP on the Neoverse V2, and I think I see a 2.4% improvement in x264 (I haven't done too many iterations but usually x264 is stable). All the other apps were neutral, I didn't see regressions. So, I think that's an okay result.

https://github.com/llvm/llvm-project/pull/108190