[Bug 62756] New: Rendering errors on rv790 with llvm and unigine heaven 3.0

[Bug 62756] New: Rendering errors on rv790 with llvm and unigine heaven 3.0

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=62756

          Priority: medium
            Bug ID: 62756
          Assignee: dri-devel@lists.freedesktop.org
           Summary: Rendering errors on rv790 with llvm and unigine heaven
                    3.0
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: lists@andyfurniss.entadsl.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Drivers/Gallium/r600
           Product: Mesa

Created attachment 77043
  --> https://bugs.freedesktop.org/attachment.cgi?id=77043&action=edit
heaven + llvm on rv790 rendering errors.

rv790 with git mesa and svn llvm, testing unigine heaven 3.0 like -

MESA_EXTENSION_OVERRIDE=-GL_ARB_shader_bit_encoding 
force_glsl_extensions_warn=true  ./heaven

I haven't tested this for a while - it was OK sometime ago with FDO llvm but
now I am getting some rendering errors (scree shot attached) with current mesa
git and llvm svn.

I tried finding a working commit going back with mesa, but I get to a point
where llvm renders nothing at all with anything using current llvm svn.

R600_LLVM=0 has no problems.

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[Bug 62756] Rendering errors on rv790 with llvm and unigine heaven 3.0

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https://bugs.freedesktop.org/show_bug.cgi?id=62756

Andy Furniss <lists@andyfurniss.entadsl.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #77043|text/plain                  |image/jpeg
          mime type|                            |

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[Bug 62756] Rendering errors on rv790 with llvm and unigine heaven 3.0

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https://bugs.freedesktop.org/show_bug.cgi?id=62756

--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
(In reply to comment #1)
> I tried finding a working commit going back with mesa, but I get to a point
> where llvm renders nothing at all with anything using current llvm svn.

There have been incompatible changes to the interface between r600g and the
LLVM R600 backend, so you'd probably need a matching LLVM snapshot. The Git
mirror at http://llvm.org/git/llvm.git might be helpful for this.

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[Bug 62756] Rendering errors on rv790 with llvm and unigine heaven 3.0

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https://bugs.freedesktop.org/show_bug.cgi?id=62756

--- Comment #2 from Andy Furniss <lists@andyfurniss.entadsl.com> ---
(In reply to comment #1)
> (In reply to comment #1)
> > I tried finding a working commit going back with mesa, but I get to a point
> > where llvm renders nothing at all with anything using current llvm svn.
> 
> There have been incompatible changes to the interface between r600g and the
> LLVM R600 backend, so you'd probably need a matching LLVM snapshot. The Git
> mirror at http://llvm.org/git/llvm.git might be helpful for this.

OK, it is in llvm. Bisecting with mesa on head comes up with -

fd49dac48fee6da580157515dec55ed2f2d8f2b3 is the first bad commit
commit fd49dac48fee6da580157515dec55ed2f2d8f2b3
Author: Vincent Lejeune <vljn@ovi.com>
Date:   Mon Mar 11 18:15:06 2013 +0000

    R600: Fix JUMP handling so that MachineInstr verification can occur

    This allows R600 Target to use the newly created -verify-misched llc flag

    git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176819
91177308-0d34-0410-b5e6-96231b3b80d8

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[Bug 62756] Rendering errors on rv790 with llvm and unigine heaven 3.0

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https://bugs.freedesktop.org/show_bug.cgi?id=62756

--- Comment #3 from Andy Furniss <lists@andyfurniss.entadsl.com> ---
Created attachment 77308
  --> https://bugs.freedesktop.org/attachment.cgi?id=77308&action=edit
heaven regressed more with current heads

The recent changes to llvm and mesa have regressed heaven more.

Still OK with R600_LLVM=0, and other games are not affected.

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[Bug 62756] Rendering errors on rv790 with llvm and unigine heaven 3.0

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https://bugs.freedesktop.org/show_bug.cgi?id=62756

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |vljn@ovi.com

--- Comment #4 from Michel Dänzer <michel@daenzer.net> ---
Vincent, are you seeing r600g/LLVM bug reports like this one?

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[Bug 62756] Rendering errors on rv790 with llvm and unigine heaven 3.0

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https://bugs.freedesktop.org/show_bug.cgi?id=62756

--- Comment #5 from vincent <vljn@ovi.com> ---
No, I don't receive mail from bugzilla until someone add me manually to the cc
list (dont know what to do to fix that though)

I'm aware of the regression with latest HEAD, I'm working on a fix.
r600g still adds CF_ALU on its own which break CF_CLAUSE address natively
encoded by llvm.

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[Bug 62756] Rendering errors on rv790 with llvm and unigine heaven 3.0

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https://bugs.freedesktop.org/show_bug.cgi?id=62756

--- Comment #6 from Andy Furniss <adf.lists@gmail.com> ---
(In reply to comment #5)
> No, I don't receive mail from bugzilla until someone add me manually to the
> cc list (dont know what to do to fix that though)

drivers/gallium/r600 bugs get sent to the dri-devel list.

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[Bug 62756] Rendering errors on rv790 with llvm and unigine heaven 3.0

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https://bugs.freedesktop.org/show_bug.cgi?id=62756

--- Comment #7 from vincent <vljn@ovi.com> ---
(In reply to comment #6)
> (In reply to comment #5)
> > No, I don't receive mail from bugzilla until someone add me manually to the
> > cc list (dont know what to do to fix that though)
> 
> drivers/gallium/r600 bugs get sent to the dri-devel list.

Ok, I always looked on mesa-dev for bugs, thank for pointing me this.

Does the "big" regression still occur with at least revision r178667 for llvm
and commit
http://cgit.freedesktop.org/mesa/mesa/commit/?id=159d9340662a70df3dcc9da1681f5b0a8e7650cf
for mesa ?

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[Bug 62756] Rendering errors on rv790 with llvm and unigine heaven 3.0

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https://bugs.freedesktop.org/show_bug.cgi?id=62756

--- Comment #8 from Andy Furniss <adf.lists@gmail.com> ---
(In reply to comment #7)
> (In reply to comment #6)
> > (In reply to comment #5)
> > > No, I don't receive mail from bugzilla until someone add me manually to the
> > > cc list (dont know what to do to fix that though)
> > 
> > drivers/gallium/r600 bugs get sent to the dri-devel list.
> 
> Ok, I always looked on mesa-dev for bugs, thank for pointing me this.
> 
> Does the "big" regression still occur with at least revision r178667 for
> llvm and commit
> http://cgit.freedesktop.org/mesa/mesa/commit/
> ?id=159d9340662a70df3dcc9da1681f5b0a8e7650cf for mesa ?

Yes, it's the same with those.

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[Bug 62756] Rendering errors on rv790 with llvm and unigine heaven 3.0

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https://bugs.freedesktop.org/show_bug.cgi?id=62756

--- Comment #9 from vincent <vljn@ovi.com> ---
Created attachment 77490
  --> https://bugs.freedesktop.org/attachment.cgi?id=77490&action=edit
Proposed patch

Does this patch solve the big regression ?

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[Bug 62756] Rendering errors on rv790 with llvm and unigine heaven 3.0

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https://bugs.freedesktop.org/show_bug.cgi?id=62756

--- Comment #10 from Andy Furniss <adf.lists@gmail.com> ---
(In reply to comment #9)
> Created attachment 77490 [details] [review]
> Proposed patch
> 
> Does this patch solve the big regression ?

No, it's the same with that.

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[Bug 62756] Rendering errors on rv790 with llvm and unigine heaven 3.0

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https://bugs.freedesktop.org/show_bug.cgi?id=62756

--- Comment #11 from vincent <vljn@ovi.com> ---
Created attachment 77534
  --> https://bugs.freedesktop.org/attachment.cgi?id=77534&action=edit
native inst support for mesa

Sorry, I didn't notice that mesa didn't translate native instruction for r700.
You'll need this patch, as well as the previous one ; it should fix the big
regression. Can you confirm this ?

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[Bug 62756] Rendering errors on rv790 with llvm and unigine heaven 3.0

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https://bugs.freedesktop.org/show_bug.cgi?id=62756

--- Comment #12 from Andy Furniss <adf.lists@gmail.com> ---
(In reply to comment #11)
> Created attachment 77534 [details] [review]
> native inst support for mesa
> 
> Sorry, I didn't notice that mesa didn't translate native instruction for
> r700.
> You'll need this patch, as well as the previous one ; it should fix the big
> regression. Can you confirm this ?

Yes, this fixes the big regression and I also no longer see the original
regression.

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[Bug 62756] Rendering errors on rv790 with llvm and unigine heaven 3.0

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https://bugs.freedesktop.org/show_bug.cgi?id=62756

Andy Furniss <adf.lists@gmail.com> changed:

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

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