Zebediah Figura (@zfigura) commented about tests/hlsl/function.shader_test:
% Recursion is forbidden.
-[pixel shader notimpl] +[pixel shader notimpl(sm<6) fail(sm>=6)]
Does dxcompiler ever return E_NOTIMPL? I wonder if we should just map E_NOTIMPL to E_FAIL in the backend and avoid the test diff.