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

[Carl Ritson via llvm-commits]

https://github.com/perlfu commented:

I ran this over a large number of graphics shaders (~100k) for GFX12.
It had some impact on ~1.1% of those and removed mean ~1.7 v_mov instructions per impacted shader.
(You can read that as it removed 0.08% of v_mov instructions.)

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