[llvm] [PredicateInfo] Support existing `PredicateType` by adding `PredicatePHI` when needing introduction of phi nodes (PR #151132)

[Rajveer Singh Bharadwaj via llvm-commits]

Rajveer100 wrote:

Linux tests have passed, looking into the Windows CI, seems to be just a labelling issue.

https://github.com/llvm/llvm-project/pull/151132