[clang] [llvm] [AMDGPU][clang][CodeGen][opt] Add late-resolved feature identifying predicates (PR #134016)

[Aaron Ballman via cfe-commits]

https://github.com/AaronBallman commented:

I think the proposed approach is a reasonable direction. WDYT @erichkeane ?

https://github.com/llvm/llvm-project/pull/134016