[llvm] [VPlan] Manage FindLastIV start value in ComputeFindLastIVResult (NFC) (PR #132690)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

Yep I'll probably also introduce a separate opcode for AnyOf reductions in any case, to simplify execute, thanks

https://github.com/llvm/llvm-project/pull/132690