[llvm] [AMDGPU][MachineRegisterInfo] Extend the MRI live-ins check to account for Subreg (PR #126926)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm commented:

On second look, I'm not sure what problem this is supposed to solve. Last I checked, the MachineVerifier did not use the MachineRegisterInfo / MachineFunction liveins for anything. It does not factor into the liveness calculation, or verification. Only the MachineBasicBlock's liveins should matter (where we do have actual bugs in the verifier, especially for the entry block).



https://github.com/llvm/llvm-project/pull/126926