[Bug 89034] Firefox crashing xserver and some major rendering bugs

[bugzilla-daemon@freedesktop.org]

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https://bugs.freedesktop.org/show_bug.cgi?id=89034

            Bug ID: 89034
           Summary: Firefox crashing xserver and some major rendering bugs
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: critical
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: smoki00790@gmail.com
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 113269
  --> https://bugs.freedesktop.org/attachment.cgi?id=113269&action=edit
valley_artifacts

Well i put this as radeosi bug as i am not sure if happens elsewhere. It is
LLVM bug actually which happens once subreg liveness is enabled, so svn 228228
is bisected as bad. I running current llvm with subreg liveness disabled, as
this is major/grave one bug for me.

 Same issue was present in Tom's perf branches last month once subreg liveness
is enabled too.

 Hardware is kabini (Athlon 5350), current Debian Sid 64bit, kernel 3.19.0,
xserver git, mesa git, etc...

 Attached is screenshot from Unigine Valley for example, there are major
rendering issues in many other GL apps.

 For Firefox crashing xserver not sure how to debug that (btw it crashed X
immidiate at starting FF) , if i build llvm with debug and assertations
screen/monitor somehow looks like it goes sleep mode (without any messages in
logs) and only hard reset helps. If i build llvm without those it just crashing
xserver, but there is not enough info in Xorg.0.log :(

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