https://bugs.freedesktop.org/show_bug.cgi?id=99349
--- Comment #4 from Gert Wollny gw.fossdev@gmail.com --- The same problem also seems to be discussed in these mails
http://mesa-dev.freedesktop.narkive.com/cHAXj1eT/bug-50338-radeon-tgsi-takes...
It is very likely that this is actually a duplicated of #50338.