[llvm] [VPlan] Compute induction end values in VPlan. (PR #112145)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

Split off the changes to simplify DerivedIV to e1833e3a7e9de126d0a71d439bb862a8e20a5e4f and use it to simplify `createScalarIVSteps`

https://github.com/llvm/llvm-project/pull/112145