https://bugs.freedesktop.org/show_bug.cgi?id=89034
--- Comment #30 from Michel Dänzer michel@daenzer.net --- (In reply to smoki from comment #29)
I did fresh piglit run now and it shows there are 159 regressed now...
I think at least the piglit regressions aren't directly related to sub-register liveness and should be tracked in a separate bug report:
On my Kaveri, I've been seeing random failures of some (of the same as yours) piglit tests recently (with sub-register liveness disabled). The only way I've found to avoid those failures is to keep rebooting until I get lucky. It seems like some recent change (most likely in Mesa?) causes the hardware to go into a weird, semi-persistent state.
I'm afraid it might be tricky to bisect that, but it would be very helpful.