[llvm] [LV][VPlan] Reduce register usage of VPEVLBasedIVPHIRecipe. (PR #154482)

[Luke Lau via llvm-commits]

https://github.com/lukel97 commented:

Makes sense to me. This might be useful for #144520. Have you been enabling max-bandwidth downstream?

https://github.com/llvm/llvm-project/pull/154482