[Bug 58150] New: LLVM regression on 4090 since r600g: Use default mul/mad function for tgsi-to-llvm

[Bug 58150] New: LLVM regression on 4090 since r600g: Use default mul/mad function for tgsi-to-llvm

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=58150

          Priority: medium
            Bug ID: 58150
          Assignee: dri-devel@lists.freedesktop.org
           Summary: LLVM regression on 4090 since r600g: Use default
                    mul/mad function for tgsi-to-llvm
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: lists@andyfurniss.entadsl.com
          Hardware: x86 (IA32)
            Status: NEW
           Version: git
         Component: Drivers/Gallium/r600
           Product: Mesa

HD4890, git ~/tstellar/llvm, drm-next. since mesa commit -

commit 0ad1fefd6951aa47ab58a41dc9ee73083cbcf85c
Author: Vincent Lejeune <vljn@ovi.com>
Date:   Wed Nov 28 00:35:55 2012 +0100

    r600g: Use default mul/mad function for tgsi-to-llvm

    Reveiwed-by: Tom Stellard <thomas.stellard at amd.com>

Mesa demos gearbox and fbo_firecube get one of the internal faces blacked out
at certain angles.

R600_LLVM=0 renders properly.

Happens before and after the commits that just went into ~/tstellar/llvm.

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[Bug 58150] LLVM regression on 4890 since r600g: Use default mul/mad function for tgsi-to-llvm

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https://bugs.freedesktop.org/show_bug.cgi?id=58150

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|LLVM regression on 4090     |LLVM regression on 4890
                   |since r600g: Use default    |since r600g: Use default
                   |mul/mad function for        |mul/mad function for
                   |tgsi-to-llvm                |tgsi-to-llvm

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[Bug 58150] LLVM regression on 4890 since r600g: Use default mul/mad function for tgsi-to-llvm

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https://bugs.freedesktop.org/show_bug.cgi?id=58150

--- Comment #1 from Tom Stellard <tstellar@gmail.com> ---
This should be fixed by commit: ffe1794e0c7efc46e7a5056ac222dd081cae4020 

Can you confirm?

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[Bug 58150] LLVM regression on 4890 since r600g: Use default mul/mad function for tgsi-to-llvm

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=58150

--- Comment #2 from Andy Furniss <lists@andyfurniss.entadsl.com> ---
(In reply to comment #1)
> This should be fixed by commit: ffe1794e0c7efc46e7a5056ac222dd081cae4020 
> 
> Can you confirm?

No, I am seeing this on current head of mesa master.

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[Bug 58150] LLVM regression on 4890 since r600g: Use default mul/mad function for tgsi-to-llvm

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=58150

Michel Dänzer <michel@daenzer.net> changed:

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

--- Comment #3 from Michel Dänzer <michel@daenzer.net> ---
commit c446baa0be1ed2a3bf157519f89a65d348aad17c
Author: Michel Danzer <michel.daenzer@amd.com>
Date:   Fri Mar 22 14:09:10 2013 +0000

    R600: Use legacy (0 * anything = 0) MUL instructions for pow intrinsics

    Fixes wrong lighting in some corner cases with r600g and radeonsi, e.g.
    manifested by failure of two piglit/glean tests and intermittent black
    patches in many apps.

    Tested on SI and RS880.

    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=62012 [radeonsi]
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=58150 [r600g]

    NOTE: This is a candidate for the Mesa stable branch.

    Reviewed-by: Christian König <christian.koenig@amd.com>

    git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177730
91177308-0d34-0410-b5e6-96231b3b80d8

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