[llvm] [VPlan] Convert EVL loops to variable-length stepping after dissolution (PR #147222)

[Luke Lau via llvm-commits]

https://github.com/lukel97 approved this pull request.

Changes to `llvm/test/Transforms/LoopVectorize/RISCV/vectorize-force-tail-with-evl-interleave.ll` LGTM

https://github.com/llvm/llvm-project/pull/147222