[Bug 99311] [regression, bisected, core] Updating to 1edc53a66b breaks SDDM (white screen on launch)

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changed bug 99311
What Removed Added
Component Drivers/Gallium/radeonsi Mesa core
CC   kenneth@whitecape.org
Summary [regression,radeonsi] Updating to 1edc53a66b breaks SDDM (white screen on launch) [regression,bisected,core] Updating to 1edc53a66b breaks SDDM (white screen on launch)
Keywords   bisected
QA Contact dri-devel@lists.freedesktop.org mesa-dev@lists.freedesktop.org
Assignee dri-devel@lists.freedesktop.org mesa-dev@lists.freedesktop.org

Comment # 1 on bug 99311 from
Ok, I finished the bisection:
8b5749f65ac434961308ccb579fb8a816e4f29d5 is the first bad commit
commit 8b5749f65ac434961308ccb579fb8a816e4f29d5
Author: Kenneth Graunke <kenneth@whitecape.org>
Date:   Sun Nov 15 04:37:50 2015 -0800

    glsl: Override the # of varying slots for ClipDistance and TessLevel*.

    Right now, this shouldn't have any effect, as all drivers use
    LowerClipDist and LowerTessFactors to turn the float[] arrays into
    vectors.

    However, it should help make it possible for drivers to avoid that
    lowering.

    Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
    Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
    Reviewed-by: Timothy Arceri <timothy.arceri@collabora.com>

:040000 040000 1b29c9a54c33c8809e38f8fd99ea7dbb1935107e
5900d84fdc8d64a53dae3b7c4ac01be73b31c614 M      src

The bisection log is:
# bad: [1edc53a66b33e4d17688a3d03b1bdffed2aec414] glsl: fix opt_minmax
redundancy checks against baserange
# good: [c93efb0a4fd7dba8390e066605fe5f4c3e26e767] swr: [rasterizer core]
rename OutputMerger functions
git bisect start '1edc53a66b' 'c93efb0a4f'
# good: [6e7ce1ef55b138ed2cdedb40cbc010b523de8743] gallivm: generalize
4x4f->1x16ub special case conversion
git bisect good 6e7ce1ef55b138ed2cdedb40cbc010b523de8743
# bad: [e6ae19944d977dc91bc45adff679337182c20683] i965: Rework gl_TessLevel*[]
handling to use NIR compact arrays.
git bisect bad e6ae19944d977dc91bc45adff679337182c20683
# bad: [5c580e64cc206ab160e1767c42e4d6c81f67da4d] glsl: Mark whole variable
used for ClipDistance and TessLevel*.
git bisect bad 5c580e64cc206ab160e1767c42e4d6c81f67da4d
# good: [aead6a1e947af84b0af2853c204d5cad6d92bfff] gallium/radeon: use the
internal clear_buffer callback to fix r600g
git bisect good aead6a1e947af84b0af2853c204d5cad6d92bfff
# bad: [8b5749f65ac434961308ccb579fb8a816e4f29d5] glsl: Override the # of
varying slots for ClipDistance and TessLevel*.
git bisect bad 8b5749f65ac434961308ccb579fb8a816e4f29d5
# good: [6aa5cb34d03765b7be8611aa516bc201bd337f73] glsl: Create and use a new
ir_variable::count_attribute_slots() wrapper.
git bisect good 6aa5cb34d03765b7be8611aa516bc201bd337f73
# first bad commit: [8b5749f65ac434961308ccb579fb8a816e4f29d5] glsl: Override
the # of varying slots for ClipDistance and TessLevel*.

I verified this is really the first bad commit by building 1edc53a66b with
8b5749f65a reverted and that gave me a working SDDM again.


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