[llvm] [JumpThreading] Materialize PHIs in duplicateCondBranchOnPHIIntoPred (PR #204859)

[Nikita Popov via llvm-commits]

nikic wrote:

I don't really get how/why this fixes https://github.com/llvm/llvm-project/issues/197725. That case doesn't seem to have any phis that reference each other?

https://github.com/llvm/llvm-project/pull/204859