[llvm] [X86, SimplifyCFG] Allow more PHIs when sinking common code on target supports CMOV (PR #110420)

[Phoebe Wang via llvm-commits]

phoebewang wrote:

@nikic Thanks for the comments! I agree with you and don't think that's the right way for cmove optimization. I don't have a good idea for now. Let me turn it into draft and revisit later.

https://github.com/llvm/llvm-project/pull/110420