[Bug 91725] R600 asserts in sb_shed.c:251 during Shader Backend optimization pass.

[Bug 91725] R600 asserts in sb_shed.c:251 during Shader Backend optimization pass.

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=91725

            Bug ID: 91725
           Summary: R600 asserts in sb_shed.c:251 during Shader Backend
                    optimization pass.
           Product: Mesa
           Version: git
          Hardware: x86 (IA32)
                OS: All
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/Gallium/r600
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: ikalvachev@gmail.com
        QA Contact: dri-devel@lists.freedesktop.org

Created attachment 117861
  --> https://bugs.freedesktop.org/attachment.cgi?id=117861&action=edit
The shader causing the problem as TGSI and R600 bytecode. Created by Nine.

The exact error message is:
sb/sb_sched.cpp:251:unreserve: Assertion `rp[cycle][chan] == sel &&
uc[cycle][chan]' failed.

It doesn't trigger if I replay with "R600_DEBUG=nobs".
My hardware is Radeon HD5670 (Redwood).

I have attached part of the log created by "R600_DEBUG=vs,ps" containing the
TGSI code and the unoptimized R600 bytecode.

The bug is reproduced by replaying d3d9 trace of the game "The Forest". The
trace file has been uploaded to ixit ftp server. You need d3dretrace.exe (from
apitrace compiled for windows) and wine. It is preferable is wine have ixit
Nine patch and mesa-git with Nine enabled.

The bug is reproduced by both Nine state tracker and  by the OpenGL one (when
using vanilla wined3d opengl wrapper). Since the the OpenGL TGSI code is
different, I'm attaching it too.

If you need more info, feel free to ask me.

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[Bug 91725] R600 asserts in sb_shed.c:251 during Shader Backend optimization pass.

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=91725

--- Comment #1 from iive <ikalvachev@gmail.com> ---
Created attachment 117862
  --> https://bugs.freedesktop.org/attachment.cgi?id=117862&action=edit
The shader causing the problem as TGSI and R600 bytecode. Created by OpenGL

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[Bug 91725] R600 asserts in sb_shed.c:251 during Shader Backend optimization pass.

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https://bugs.freedesktop.org/show_bug.cgi?id=91725

Vadim Girlin <vadimgirlin@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |glenn.kennard@gmail.com

--- Comment #2 from Vadim Girlin <vadimgirlin@gmail.com> ---
Adding Glenn, hopefully he can solve this... Looks like he already knows more
about that stuff than I remember about it.

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[Bug 91725] R600 asserts in sb_shed.c:251 during Shader Backend optimization pass.

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https://bugs.freedesktop.org/show_bug.cgi?id=91725

--- Comment #3 from iive <ikalvachev@gmail.com> ---
Created attachment 117875
  --> https://bugs.freedesktop.org/attachment.cgi?id=117875&action=edit
The shader causing the problem as original D3D code and TGSI created by Nine.

Since the shader is having some undefined values, there is a chance the
original D3D shader is not entirely correct. That's why I've extracted it
(NINE_DEBUG=shader NINE_TGSI_DUMP=1).

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[Bug 91725] R600 asserts in sb_shed.c:251 during Shader Backend optimization pass.

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https://bugs.freedesktop.org/show_bug.cgi?id=91725

--- Comment #4 from Glenn Kennard <glenn.kennard@gmail.com> ---
Commits 608c7b a83022 36f199 should fix the crashes in this trace

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[Bug 91725] R600 asserts in sb_shed.c:251 during Shader Backend optimization pass.

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https://bugs.freedesktop.org/show_bug.cgi?id=91725

iive <ikalvachev@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #5 from iive <ikalvachev@gmail.com> ---
Yes, these commits fix all r600 issues in the sample.
Don't forget to backport them to the stable branches.

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