https://bugs.freedesktop.org/show_bug.cgi?id=93475
--- Comment #3 from iive@yahoo.com --- Could you try `export R600_DEBUG=nosb`?
This disables Shader Backend that optimizes the assembler code. If this workarounds the problem, it would be useful to provide an apitrace of the game that could reproduce your problem.
These may be related: https://bugs.freedesktop.org/show_bug.cgi?id=86720 https://bugs.freedesktop.org/show_bug.cgi?id=94900