[llvm] [AMDGPU] Post-RA Peephole for Two-Address Instructions (PR #207731)

[Lukas Sommer via llvm-commits]

sommerlukas wrote:

> Are all the test changes necessary?

Sorry, missed that in the last round. Yes, the test changes are unfortunately necessary. Otherwise, we hit the assertion here https://github.com/llvm/llvm-project/blob/a47be1995a65a411527062e7ca7e92fff8d6ad1b/llvm/lib/CodeGen/MachineBasicBlock.cpp#L1818-L1822 now that the `ReachingDefAnalysis` is part of the pipeline as a required analysis.

https://github.com/llvm/llvm-project/pull/207731