AMD Radeon Graphics Performance With The Linux 3.19 Kernel

[dungeon]

And if you try reverting this patch only, does it work ?

Yes, reverting a patch and rendering is OK . Just to mention, all that is tested with mesa used which is also Tom's one : http://cgit.freedesktop.org/~tstella...ing-Jan07-2014 So those two, with last patch reverted, all is fine - no issues.

If i try to use current proper mesa master against that llvm perf branch of course it complains about: Warning: Compiler emitted unknown config register: 0x286e8

So this mesa:

http://cgit.freedesktop.org/~tstellar/mesa/log/?h=vgpr-spilling-Jan07-2014

up to this llvm commit is fine:

http://cgit.freedesktop.org/~tstellar/llvm/commit/?h=perf-Jan-08-2015&id=f11db5d5151e41e445cc8965f0d370414297ba23

and this one broke rendering:

http://cgit.freedesktop.org/~tstellar/llvm/commit/?h=perf-Jan-08-2015&id=e106085e92a081aa4328a1297c9f0ff3f1ddca2d