https://bugs.freedesktop.org/show_bug.cgi?id=100785
Bug ID: 100785
Summary: [regression, bisected] arb_gpu_shader5 piglit fail
Product: Mesa
Version: git
Hardware: Other
OS: All
Status: NEW
Severity: normal
Priority: medium
Component: Drivers/Gallium/r600
Assignee: dri-devel@lists.freedesktop.org
Reporter: hi-an...@yandex.ru
QA Contact: dri-devel@lists.freedesktop.org
Failing tests:
bin/arb_gpu_shader5-interpolateAtSample -auto -fbo
bin/arb_gpu_shader5-interpolateAtSample-nonconst -auto -fbo
Bisection result:
eb8aa93c03ee89ffd3041d41b6293e4b282b6ce6 is the first bad commit
commit eb8aa93c03ee89ffd3041d41b6293e4b282b6ce6
Author: Timothy Arceri <tarc...@itsqueeze.com>
Date: Fri Apr 14 16:25:58 2017 +1000
glsl: disable varying packing for varying used by interpolateAt*
Currently the NIR backends depend on GLSL IR copy propagation to
fix up the interpolateAt* function params after varying packing
changes the shader input to a global. It's possible copy propagation
might not always do what we need it too, and we also shouldn't
depend on optimisations to do this type of thing for us.
I'm not sure if the same is true for TGSI, but the following
commit should re-enable packing for most cases in a safer way,
so we just disable it everywhere.
No change in shader-db for i965 (BDW)
Acked-by: Elie Tournier <elie.tourn...@collabora.com>
Reviewed-by: Kenneth Graunke <kenn...@whitecape.org>
Reverting the commit fixes the problem.
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