[Bug 64694] New: xorg fail to start after llvm upgrade

[Bug 64694] New: xorg fail to start after llvm upgrade

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=64694

          Priority: medium
            Bug ID: 64694
          Assignee: dri-devel@lists.freedesktop.org
           Summary: xorg fail to start after llvm upgrade
          Severity: blocker
    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 79451
  --> https://bugs.freedesktop.org/attachment.cgi?id=79451&action=edit
crash image

After update llvm to 16/05/2013 svn and mesa git xorg crashes giving a list of
symbols of selectiondag and passmanager.

ILl atach image feom the crash(writing from my tablet)

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[Bug 64694] xorg fail to start after llvm upgrade

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https://bugs.freedesktop.org/show_bug.cgi?id=64694

Rafael Castillo <jrch2k10@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|medium                      |highest

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[Bug 64694] xorg fail to start after llvm upgrade

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https://bugs.freedesktop.org/show_bug.cgi?id=64694

Rafael Castillo <jrch2k10@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
  Attachment #79451|text/plain                  |image/jpeg
          mime type|                            |

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[Bug 64694] xorg fail to start after llvm upgrade

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https://bugs.freedesktop.org/show_bug.cgi?id=64694

Michel Dänzer <michel@daenzer.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |deathsimple@vodafone.de

--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
I bisected this to LLVM r182062: 'Generate debug info for by-value struct args
even if they are not used.' Enabling the DEBUG code in
SelectionDAGISel::LowerArguments(), it complains that "LowerFormalArguments
emitted a null value!".

I suspect SITargetLowering::LowerFormalArguments() needs to be adapted for
this, but I'm not sure how. Christian, can you take a look?

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[Bug 64694] xorg fail to start after llvm upgrade

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https://bugs.freedesktop.org/show_bug.cgi?id=64694

Christian König <deathsimple@vodafone.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|dri-devel@lists.freedesktop |deathsimple@vodafone.de
                   |.org                        |

--- Comment #2 from Christian König <deathsimple@vodafone.de> ---
Created attachment 79457
  --> https://bugs.freedesktop.org/attachment.cgi?id=79457&action=edit
Possible fix

Does this patch helps?

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