[llvm] [VPlan] - Generalize dead cycle removal in removeDeadRecipes. (PR #213632)

[Luke Lau via llvm-commits]

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lukel97 wrote:

This is no longer testing what it's meant to test, can you change the inner select to a non-zero constant so it's not optimized away

https://github.com/llvm/llvm-project/pull/213632