[Bug 46006] New: [r300g, bisected] piglit glsl-max-varyings fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=46006

             Bug #: 46006
           Summary: [r300g, bisected] piglit glsl-max-varyings fails
    Classification: Unclassified
           Product: Mesa
           Version: git
          Platform: Other
        OS/Version: All
            Status: NEW
          Keywords: regression
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r300
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: pavel.ondracka at email.cz
                CC: maraeo at gmail.com


This is the last r300g piglit regression from 7.11 to 8.0. I'm not sure if this is a valid bug, there is lots of errors:

r300: ERROR: FS input generic 20 unassigned, not enough hardware slots (it's not a bug, do not report it).
r300: ERROR: FS input generic 21 unassigned, not enough hardware slots (it's not a bug, do not report it).

However since this is a regression I'm reporting it nevertheless. May also be related to bug 34201 


Output:
Vertical axis: Increasing numbers of varyings.
Horizontal axis: Which of the varyings contains the color.
GL_MAX_VARYING_FLOATS = 40
Probe at (8,98)
  Expected: 0.000000 1.000000 0.000000
  Observed: 0.000000 0.000000 0.000000
  Failure with 9 vec4 varyings used in varying index 0
Probe at (8,110)
  Expected: 0.000000 1.000000 0.000000
  Observed: 0.000000 0.000000 0.000000
  Failure with 10 vec4 varyings used in varying index 0


1ded658ce074a85bc08c989ff17840b840ff3051 is the first bad commit
commit 1ded658ce074a85bc08c989ff17840b840ff3051
Author: Marek Olšák <maraeo at gmail.com>
Date:   Tue Nov 22 15:05:29 2011 +0100

    st/mesa: add color varyings to MaxVarying

    The linker now adds color varyings to the number of used varyings and checks
    against that limit.

    NOTE: This is a candidate for the 7.11 branch.


GPU: RV530
Mesa: df1cd55ebf362948788c04d2fa7da55c80991605
Kernel: 3.2.3
Libdrm: 2.4.31

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