[Bug 60552] New: [r300g] Carvisualizer webgl demo: black flickering spots over the car

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=60552

          Priority: medium
            Bug ID: 60552
          Assignee: dri-devel at lists.freedesktop.org
           Summary: [r300g] Carvisualizer webgl demo: black flickering
                    spots over the car
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: pavel.ondracka at email.cz
               URL: http://carvisualizer.plus360degrees.com/threejs/
          Hardware: Other
            Status: NEW
           Version: git
         Component: Drivers/Gallium/r300
           Product: Mesa

Created attachment 74497
  --> https://bugs.freedesktop.org/attachment.cgi?id=74497&action=edit
screenshot

In the Car Visualizer Webgl demo, there are some flickering black spots on the
car. This is probably a bug in the shader compiler, as RADEON_DEBUG=noopt works
around this. Specifically its the register_rename pass that causes this, when
it is disabled in r3xx_fragprog.c, everything is fine. Also when I disable only
the dataflow optimize pass, there is still some flickering but much less.

Firefox 18.0
GPU:RV530
Mesa: 0e2f26d5ea26febd16173aa8bbf7427b090e320f
Kernel: 3.7.3-101.fc17.i686

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