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

[Joseph Huber via llvm-commits]

jhuber6 wrote:

High liklihood that I'll need something similar for my GPU libraries so I'd prefer something not explicitly tied to SPIR-V.

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