[llvm] [AMDGPU][FixIrreducible][UnifyLoopExits] Support callbr with inline-asm (PR #149308)

[Michael Kruse via llvm-commits]

https://github.com/Meinersbur approved this pull request.

LGTM.

If in the future someone is refactoring SplitEdge, they may now also see and possibly include SplitBrEdge.

https://github.com/llvm/llvm-project/pull/149308