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

[Luke Lau via llvm-commits]

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lukel97 wrote:

Same here, probably best to change this to
```suggestion
  %sel = select i1 %c, i32 1, i32 %rdx
```

or something so it doesn't get optimized away

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