[llvm] [VPlan] Add initial VPScalarEvolution, use to get trip count SCEV (NFC) (PR #94464)

[Florian Hahn via llvm-commits]

fhahn wrote:

I think at this point it is not yet clear if it is desirable to add a common interface to VPValue/VPRecipeBase to get corresponding SCEVs, or if it makes more sense to have more specific interfaces returning more targeted information required to make vectorization decisions. This is why I think a lightweight helper functions for constructing trivial SCEVs would be a good start. WDYT?

https://github.com/llvm/llvm-project/pull/94464