Bug 50999

Summary: [r300g, bisected] piglit glsl-fs-discard-04 fails
Product: Mesa Reporter: Pavel Ondračka <pavel.ondracka>
Component: Drivers/Gallium/r300Assignee: Default DRI bug account <dri-devel>
Status: RESOLVED MOVED QA Contact:
Severity: normal    
Priority: medium CC: eric, tstellar
Version: gitKeywords: regression
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:
Attachments: RADEON_DEBUG=fp log

Description Pavel Ondračka 2012-06-12 02:31:47 UTC 
Created attachment 62924 [details]
RADEON_DEBUG=fp log

./bin/shader_runner tests/shaders/glsl-fs-discard-04.shader_test -auto -fbo
Probe at (0,0)
  Expected: 0.000000 1.000000 0.000000 0.000000
  Observed: 1.000000 0.000000 0.000000 0.000000
PIGLIT: {'result': 'fail' }

Regression test shows:
e21b9f1f19d2345026a7fbe095a776d0b64557ec is the first bad commit
commit e21b9f1f19d2345026a7fbe095a776d0b64557ec
Author: Eric Anholt <eric@anholt.net>
Date:   Fri May 4 13:37:08 2012 -0700

    glsl: Remove the opt_discard_simplification pass.
    
    This conflicts with the GLSL 1.30+ rules for derivatives after a
    discard has occurred.
    
    Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

llvmpipe works fine, so this may be another uncovered r300 compiler issue.

GPU:RV530
Kernel: 3.4.0-1.fc17.i686
Comment 1 GitLab Migration User 2019-09-18 18:51:05 UTC 
-- GitLab Migration Automatic Message --

This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/mesa/mesa/issues/343.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.