[llvm] [PredicateInfo] Support `PredicateInfo` by adding `PHI` nodes that pick up info from created branch predicates (PR #151132)

[Rajveer Singh Bharadwaj via llvm-commits]

Rajveer100 wrote:

I mean in that case each small optimisation counts in llvm right :) 

There are several issues that are very specific and niche but I guess all these minor ones add up and affects runtime? 

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