Nouveau - Jul 2017 - [Bug 101708] New: 'shader translation failed: -4' with dolphin-emu ubershaders

https://bugs.freedesktop.org/show_bug.cgi?id=101708

            Bug ID: 101708
           Summary: 'shader translation failed: -4' with dolphin-emu
                    ubershaders
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: ovariegata at yahoo.com
        QA Contact: nouveau at lists.freedesktop.org

Created attachment 132481
  --> https://bugs.freedesktop.org/attachment.cgi?id=132481&action=edit
Apitrace

When using the new ubershaders branch with dolphin-emu and nouveau it will
print this error: 

nvc0_program_translate:610 - shader translation failed: -4

I have attached an apitrace showing the issue.

Note:

The exclusive ubershaders perform poorly with nouveau while the hybrid shaders
perform well. Also a later commit in the ubershaders branch will crash with
nouveau as described here.

https://github.com/dolphin-emu/dolphin/pull/5702#issuecomment-313301072

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--- Comment #1 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Created attachment 132602
  --> https://bugs.freedesktop.org/attachment.cgi?id=132602&action=edit
shader causing RA failure

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Ilia Mirkin <imirkin at alum.mit.edu> changed:

           What    |Removed                     |Added
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 Attachment #132602|0                           |1
        is obsolete|                            |

--- Comment #2 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Created attachment 132603
  --> https://bugs.freedesktop.org/attachment.cgi?id=132603&action=edit
shader failing to compile

Er, nevermind that. That crash is caused by a bug in a local WIP patch I have
(which is trying to fix spilling logic a bit).

Actually the shader that fails to compile is a simple-seeming geometry shader.

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--- Comment #3 from Ilia Mirkin <imirkin at alum.mit.edu> ---
Sent a patch to make this work on GK110+ (embarrassing bug that caused us to
use fewer registers than were available).

However that doesn't fix it on fermi/kepler1.

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GitLab Migration User <gitlab-migration at fdo.invalid> changed:

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

--- Comment #4 from GitLab Migration User <gitlab-migration at
fdo.invalid> ---
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been
closed from further activity.

You can subscribe and participate further through the new bug through this link
to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/1137.

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