https://bugs.freedesktop.org/show_bug.cgi?id=89069
--- Comment #2 from smoki smoki00790@gmail.com ---
OK it is not the same, bisected this to 0e9cdedd2e3943bdb7f3543a3508b883b167e427
radeon/llvm: enable unsafe math for graphics shaders
This optimization looks like should be disabled for graphic too on 32bit, but will slow down things a little of course because it will render proper :D ... at least guessing should be disabled for 32bit only until sameone approve it happens on 64bit mesa/software too.
Ha, this one looks like good potentional candidate who made those GTT_WC issues on 32bit, need to recheck that...