RadeonSI Can Begin Using Valve's ACO Compiler For Certain Shaders
Beginning today with the newest Mesa 23.2-devel code, the environment variable option AMD_DEBUG=useaco is now available for telling the RadeonSI Gallium3D driver to use Valve's ACO shader compiler back-end rather than the AMDGPU LLVM shader compiler back-end for supported shader types.
Source: phoronix.com