[llvm] [LV] Transform to handle exits in the scalar loop (PR #148626)

[David Sherwood via llvm-commits]

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david-arm wrote:

I think it would be better to just add new RUN lines to some of the existing early exit tests, i.e. LoopVectorize/single_early_exit*.ll, etc. That way you'll get more complete coverage of all the different cases, including live-outs.

https://github.com/llvm/llvm-project/pull/148626