[Bug 109404] [ANV] The Witcher 3 shadows flickering

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109404

Danylo <danylo.piliaiev at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |danylo.piliaiev at gmail.com

--- Comment #1 from Danylo <danylo.piliaiev at gmail.com> ---
Hi, thanks for the report!

Bisected to:

commit 3561108de089f383bb7733eaf49e3d517994b51c
Author: Timothy Arceri <tarceri at itsqueeze.com>
Date:   Wed Nov 7 14:29:18 2018 +1100

    anv/i965: make use of nir_link_constant_varyings()

    shader-db results for SLK:

    total instructions in shared programs: 13106498 -> 13091573 (-0.11%)
    instructions in affected programs: 1186244 -> 1171319 (-1.26%)
    helped: 6186
    HURT: 0

    total cycles in shared programs: 332062633 -> 331961653 (-0.03%)
    cycles in affected programs: 8537165 -> 8436185 (-1.18%)
    helped: 5371
    HURT: 862

    LOST:   6
    GAINED: 14

    Reviewed-by: Jason Ekstrand <jason at jlekstrand.net>

Which is just enabling of the feature from:

commit d40dd05553e548b648c77394424b59cc0abca199
Author: Timothy Arceri <tarceri at itsqueeze.com>
Date:   Fri Nov 9 09:24:11 2018 +1100

    nir: add new linking opt nir_link_constant_varyings()

    This pass moves constant outputs to the consuming shader stage
    where possible.

    Reviewed-by: Eric Anholt <eric at anholt.net>

In RenderDoc the issue is manifested as "inverted" normal map of the scene.

I tested at the very beginning of the game and it looks like the issue you have
encountered. However it does not happen on 18.3.0.

Will look into it tomorrow if it won't be fixed until then.

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