FYI: gimark works on mesa radeonsi when using
All necessary extensions seem to be supported and it's just using the compatibility context instead of core.
No unigine valley? In my experience this is the one that works best on open source drivers compared to catalyst and I think unlike heaven all features actually work (heaven does quite a lot with tesselation)
LLVM backend problems are missing VGPR register spilling I guess? AMD really needs to put some more people on the llvm backend to fix this mess. Tom Stellard is really good, but he is just doing way too much at once.