[llvm] [LV] Optimize VPWidenIntOrFpInductionRecipe for known TC (PR #118828)

[Hari Limaye via llvm-commits]

hazzlim wrote:

I wasn't sure if this was the best/right way to approach this, so please let me know if there's a better approach to take!

https://github.com/llvm/llvm-project/pull/118828