[Mesa-dev] nir: Add ability for shaders to use window space coordinates - broken tessellation under NIR - bisected

[Dieter Nützel]

This commit (#317f10bf404) brake whole tessellation (empty parts of the 
screen) running UH under radeonsi NIR on Polaris 20 (RX580).

317f10bf404b562e1dda79c0636aee86beeccc2f is the first bad commit
commit 317f10bf404b562e1dda79c0636aee86beeccc2f
Author: Timur Kristóf <timur.kristof at gmail.com>
Date:   Tue Feb 5 18:08:24 2019 +0100

     nir: Add ability for shaders to use window space coordinates.

     This patch adds a shader_info field that tells the driver to use 
window
     space coordinates for a given vertex shader. It also enables this 
feature
     in radeonsi (the only NIR-capable driver that supported it in TGSI),
     and makes tgsi_to_nir aware of it.

     Signed-Off-By: Timur Kristóf <timur.kristof at gmail.com>
     Tested-by: Andre Heider <a.heider at gmail.com>
     Tested-by: Rob Clark <robdclark at gmail.com>
     Reviewed-by: Timothy Arceri <tarceri at itsqueeze.com>
     Reviewed-by: Eric Anholt <eric at anholt.net>

:040000 040000 3123b07ce063ffd4fee56974c64c130f3e617373 
df57eb5bb70c0e46583399c73db499e1970fdd1b M src

Reverting it fixed UH.

Sorry, I don't have time for a ticket, yet 'cause I badly need some 
sleep...

Dieter