[Bug 71285] New: Xonotic LLVM ERROR

[Bug 71285] New: Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

          Priority: medium
            Bug ID: 71285
          Assignee: dri-devel@lists.freedesktop.org
           Summary: Xonotic LLVM ERROR
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: jrch2k10@gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: Drivers/Gallium/radeonsi
           Product: Mesa

Created attachment 88735
  --> https://bugs.freedesktop.org/attachment.cgi?id=88735&action=edit
zipped shader dump

in Xonotic 7.0 several levels return this error after crash

LLVM ERROR: ran out of registers during register allocation

GL_VENDOR: X.Org
GL_RENDERER: Gallium 0.4 on AMD CAPE VERDE
GL_VERSION: 3.0 Mesa 10.0.0-devel (git-5ae31d7)

level 
maps/stormkeep

attached: shader dump

many thanks for your time

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

Rafael Castillo <jrch2k10@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|medium                      |high

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #88735|text/plain                  |application/zip
          mime type|                            |

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
Which version of LLVM are you using? If it's 3.3, does a 3.4 snapshot work
better?

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

--- Comment #2 from Rafael Castillo <jrch2k10@gmail.com> ---
I use llvm 3.4 daily emerged on gentoo

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

--- Comment #3 from Tom Stellard <tstellar@gmail.com> ---
Could you dump the assembly output from the shaders?  Use the environment
variable:
R600_DEBUG=ps,vs

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

--- Comment #4 from Rafael Castillo <jrch2k10@gmail.com> ---
Created attachment 89331
  --> https://bugs.freedesktop.org/attachment.cgi?id=89331&action=edit
R600_DEBUG=ps,vs shader dump

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

--- Comment #5 from darkbasic <darkbasic@linuxsystems.it> ---
The problem is only with the "offset mapping" effect enabled.
Radeonsi (HD 7950) + LLVM 3.4 git + mesa 10.1 git + linux 3.13

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

--- Comment #6 from Rafael Castillo <jrch2k10@gmail.com> ---
confirmed offset mapping is the culprit

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

--- Comment #7 from Tom Stellard <tstellar@gmail.com> ---
Created attachment 89615
  --> https://bugs.freedesktop.org/attachment.cgi?id=89615&action=edit
Work Around

This patch should avoid the crash, but the effect will not be rendered
correctly.  Can you test?

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

--- Comment #8 from Rafael Castillo <jrch2k10@gmail.com> ---
(In reply to comment #7)
> Created attachment 89615 [details] [review]
> Work Around
> 
> This patch should avoid the crash, but the effect will not be rendered
> correctly.  Can you test?

yes ofc, when i reach home tonight ill test it and report back

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

--- Comment #9 from Rafael Castillo <jrch2k10@gmail.com> ---
im try to test the patch but currently llvm master don't build claiming missing
unistd.h header, so once is fixed ill test the patch

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

Tom Stellard <tstellar@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #89615|0                           |1
        is obsolete|                            |

--- Comment #10 from Tom Stellard <tstellar@gmail.com> ---
Created attachment 89805
  --> https://bugs.freedesktop.org/attachment.cgi?id=89805&action=edit
Fix

This new patch is an actual fix, not just a workaround.  It fixes the crash for
me, can you verify?

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

--- Comment #11 from Rafael Castillo <jrch2k10@gmail.com> ---
sorry for the delay, about your previous patch it worked as you say. ill test
this one tonight

many thanks for your time

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

--- Comment #12 from Rafael Castillo <jrch2k10@gmail.com> ---
well it compiles just fine but since llvm 3.5 xonotic and pepper flash hard
reset the GPU. im trying to get a dump of the failure

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

--- Comment #13 from Rafael Castillo <jrch2k10@gmail.com> ---
Created attachment 89878
  --> https://bugs.freedesktop.org/attachment.cgi?id=89878&action=edit
dmesg of gpu hard reset

This with or wthout your patch

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

--- Comment #14 from darkbasic <darkbasic@linuxsystems.it> ---
If you need someone who tests the patch I can switch back to LLVM 3.4, let me
know.

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

--- Comment #15 from Arek Ruśniak <arek.rusi@gmail.com> ---
Rafael try latest libdrm from git. I had the same problem with libdrm 2.4.49

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

--- Comment #16 from Rafael Castillo <jrch2k10@gmail.com> ---
(In reply to comment #15)
> Rafael try latest libdrm from git. I had the same problem with libdrm 2.4.49

thanks, arek

i do use libdrm git but i see that 5 days ago new patches landed and im not
sure i pulled them, so i ll re emerge today to be sure and test again

many thanks for your tip

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

--- Comment #17 from Rafael Castillo <jrch2k10@gmail.com> ---
ok after updating all my stack to todays git my GPU stopped hard resseting and
effectively this patch fixes all xonotic issues.

Many many thanks for your good work tom

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[Bug 71285] Xonotic LLVM ERROR

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https://bugs.freedesktop.org/show_bug.cgi?id=71285

Tom Stellard <tstellar@gmail.com> changed:

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

--- Comment #18 from Tom Stellard <tstellar@gmail.com> ---
The fix was committed to the LLVM tree: r195880

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