[llvm-branch-commits] [llvm] release/23.x: Revert "[LV] Allow scalable epilogue VFs matching the MainLoop VF (#208686) (PR #211545)

[David Sherwood via llvm-branch-commits]

david-arm wrote:

> @david-arm What do you think about merging this into the release branch?

I'm happy with this. It fixes some significant performance regressions observed on neoverse-v1 cores, such as a 6% regression in bwaves (SPEC2017). There are alternative ways of fixing this, but they are much riskier than doing a simple revert.

https://github.com/llvm/llvm-project/pull/211545