Back in February AMD engineers introduced a new GFX1170 GPU target in LLVM for their AMDGPU shader compiler and was marked with new "RDNA 4m" branding. It's part of the GFX11 family associated with RDNA3 but carrying this new "4m" branding. In follow-up commits they made further ISA changes distinguishing it from existing RDNA 3 GPUs. Now there are two more RDNA 4m targets being added...