[Bug 97038] OpenArena couple times slower using llvm 3.9

[Bug 97038] OpenArena couple times slower using llvm 3.9

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https://bugs.freedesktop.org/show_bug.cgi?id=97038

            Bug ID: 97038
           Summary: OpenArena couple times slower using llvm 3.9
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: smoki00790@gmail.com
        QA Contact: dri-devel@lists.freedesktop.org

Actually happens in basically any ioquake3 game i tried, but i guess everybody
has OA. Distro current Debian Sid, driver radeon, hardware kabini, mesa self
compiled...

 So problem is that is several times slower, 2-3 times slower maybe when
compared to same mesa using llvm 3.8.

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[Bug 97038] OpenArena couple times slower using llvm 3.9

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https://bugs.freedesktop.org/show_bug.cgi?id=97038

--- Comment #1 from Nicolai Hähnle <nhaehnle@gmail.com> ---
Could you bisect LLVM to find out where the degraded performance comes from?

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[Bug 97038] OpenArena couple times slower using llvm 3.9

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https://bugs.freedesktop.org/show_bug.cgi?id=97038

--- Comment #2 from smoki <smoki00790@gmail.com> ---

 It is major PITA to do that on this low power APU... but if someone can't
reproduce it or figure it out without bisecting i might do that i have time.

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[Bug 97038] OpenArena couple times slower using llvm 3.9

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https://bugs.freedesktop.org/show_bug.cgi?id=97038

--- Comment #3 from smoki <smoki00790@gmail.com> ---
 BTW not all but many apps runs in slowmo mode with llvm 3.9, not just ioquake3
based games.

 Should i start llvm bisect or not i dunno, as 3.9 enable GL 4.3 instead of 4.1
with llvm 3.8, i guess it might be mesa just set up something wrong too :) I
might start banning some of those new extensions to found offender or so.

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[Bug 97038] OpenArena couple times slower using llvm 3.9

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https://bugs.freedesktop.org/show_bug.cgi?id=97038

--- Comment #4 from smoki <smoki00790@gmail.com> ---

 OK got it, here is a llvm bisect result - svn272292

 AMDGPU/SI: Fix 32-bit fdiv lowering

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[Bug 97038] OpenArena couple times slower using llvm 3.9

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https://bugs.freedesktop.org/show_bug.cgi?id=97038

--- Comment #5 from Matt Arsenault <arsenm2@gmail.com> ---
Is it better on trunk since r276051?

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[Bug 97038] OpenArena couple times slower using llvm 3.9

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https://bugs.freedesktop.org/show_bug.cgi?id=97038

--- Comment #6 from Nicolai Hähnle <nhaehnle@gmail.com> ---
Which version of Mesa are you using?

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[Bug 97038] OpenArena couple times slower using llvm 3.9

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https://bugs.freedesktop.org/show_bug.cgi?id=97038

--- Comment #7 from smoki <smoki00790@gmail.com> ---

 Mesa was latest git at moment, but i also tried something around that time and
same problem.

 Will try later against r276051 i am not on that machine currently...

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[Bug 97038] OpenArena couple times slower using llvm 3.9

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https://bugs.freedesktop.org/show_bug.cgi?id=97038

--- Comment #8 from smoki <smoki00790@gmail.com> ---

 Yup, on r276051 perf is fine.

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[Bug 97038] OpenArena couple times slower using llvm 3.9

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https://bugs.freedesktop.org/show_bug.cgi?id=97038

Vedran Miletić <vedran@miletic.net> changed:

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

--- Comment #9 from Vedran Miletić <vedran@miletic.net> ---
(In reply to smoki from comment #8)
>  Yup, on r276051 perf is fine.

Marking as fixed.

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[Bug 97038] OpenArena couple times slower using llvm 3.9

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https://bugs.freedesktop.org/show_bug.cgi?id=97038

smoki <smoki00790@gmail.com> changed:

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

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[Bug 97038] OpenArena couple times slower using llvm 3.9

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https://bugs.freedesktop.org/show_bug.cgi?id=97038

smoki <smoki00790@gmail.com> changed:

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

--- Comment #10 from smoki <smoki00790@gmail.com> ---
(In reply to Vedran Miletić from comment #9)
> (In reply to smoki from comment #8)
> >  Yup, on r276051 perf is fine.
> 
> Marking as fixed.

 If you say so, OK.

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[Bug 97038] OpenArena couple times slower using llvm 3.9

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https://bugs.freedesktop.org/show_bug.cgi?id=97038

smoki <smoki00790@gmail.com> changed:

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

--- Comment #11 from smoki <smoki00790@gmail.com> ---

 I think i will reopen this one until it is fixed with llvm 3.9 or if someone
commented that it would not be fixed in llvm 3.9.

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[Bug 97038] OpenArena couple times slower using llvm 3.9

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https://bugs.freedesktop.org/show_bug.cgi?id=97038

smoki <smoki00790@gmail.com> changed:

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

--- Comment #12 from smoki <smoki00790@gmail.com> ---

 Current mesa git and llvm 3.9 now works fine... bug somehow getting fixed by
mesa instead.

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