(In reply to Michel Dänzer from comment #1)
> Is this a regression, and if so, can you bisect? Note that it could be a
> Mesa/LLVM issue rather than a kernel one.

Technically yes. But I don't know a (reasonable) good version, because the last
time I played this game was in 2017. Between then and now there were many
updates for the game (the last one is from 2019-01-11) and an incredible amount
of commits for the kernel, Mesa and LLVM.

I'm not even sure if I still used the radeon module the last time or if I was
already on amdgpu.