llvm-project

744cd8a9 - AMDGPU: Add some baseline test for mfma rewrite with subregister copies (#153018)

AMDGPU: Add some baseline test for mfma rewrite with subregister copies (#153018) Currently only cases rooted at a full copy of an MFMA result are handled. Prepare to relax that by testing more intricate subregister usage. Currently only full copies are handled, add some tests to help work towards handling subregisters.