[Bug 94354] R9285 Unigine Valley perf regression since radeonsi: use re-Z

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Bug ID 94354
Summary R9285 Unigine Valley perf regression since radeonsi: use re-Z
Product Mesa
Version git
Hardware Other
OS All
Status NEW
Severity normal
Priority medium
Component Drivers/Gallium/radeonsi
Assignee dri-devel@lists.freedesktop.org
Reporter adf.lists@gmail.com
QA Contact dri-devel@lists.freedesktop.org

Haven't tested other apps/settings, but on R9285 Unigine Valley on highest
settings, 8x AA, 1920x1080 fullscreen is slower after 

d0f3b524cdb8489a6872ba3639a13813de221fc2

radeonsi: use re-Z
This can increase perf for shaders that kill pixels (kill, alpha-test,
alpha-to-coverage).

Before

FPS: 27.2
Score: 1139
Min FPS: 13.5
Max FPS: 52.0

After 

FPS: 22.6
Score: 946
Min FPS: 11.7
Max FPS: 47.1


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