[llvm] [DFAJumpThreading] Handle select unfolding when user phi is not a dir… (PR #109511)

[Jonas Paulsson via llvm-commits]

JonPsson1 wrote:

@XChy @ollef Maybe you could take a look and review as you seem to have some familiarity with this?

https://github.com/llvm/llvm-project/pull/109511