https://bugs.freedesktop.org/show_bug.cgi?id=75276
--- Comment #40 from Daniel Scharrer daniel@constexpr.org --- It's still reproducible in Painkiller H&D with LLVM r202464 (ie. current trunk).
While some previously broken PP effects now work, dynamic lighting is still messed up and there's plenty of this in the log:
LLVM triggered Diagnostic Handler: SIInstrInfo::storeRegToStackSlot - Can't spill VGPR! LLVM triggered Diagnostic Handler: SIInstrInfo::loadRegToStackSlot - Can't retrieve spilled VGPR!