https://bugs.freedesktop.org/show_bug.cgi?id=90378
--- Comment #7 from Daniel Scharrer daniel@constexpr.org --- Yes, afair R600_DEBUG=switch_on_eop fixed all issues with L4D2. I'll re-test with a more up to date build of LLVM and Mesa.
Adding Tom in case he has an opinion on the LLVM issue.
Looks like he already had a look at some of the LLVM parts in bug #88978.