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

[Gaëtan Bossu via llvm-commits]

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gbossu wrote:

Do you know why that loop isn't handled by `-handle-early-exits-in-scalar-tail`? The structure of the loop seems very close to what `vputils::getRecipesForUncountableExit` expects.

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