[Bug 49140] New: r600_state_common.c:761:r600_draw_vbo: Assertion `0' failed

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=49140

             Bug #: 49140
           Summary: r600_state_common.c:761:r600_draw_vbo: Assertion `0'
                    failed
    Classification: Unclassified
           Product: Mesa
           Version: git
          Platform: All
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: bgz.marko at gmail.com


Created attachment 60568
  --> https://bugs.freedesktop.org/attachment.cgi?id=60568
R600_DUMP_SHADERS

Hello,

I have an application using a rather complex shader with some branching -
while/if. Applications fails with r600 driver giving the following error:

EE r600_shader.c:140 r600_pipe_shader_create - translation from TGSI failed !
r600_state_common.c:761:r600_draw_vbo: Assertion `0' failed.

It seems something goes wrong in the branching section, since it works if I
comment it. The same shader works fine using either LIBGL_ALWAYS_SOFTWARE=1 or
fglrx. Also, I can remember working it fine with some older revision of R600,
unfortunately I don't know which one exactly.

I have attached R600_DUMP_SHADERS output. If needed I can also provide links to
source code or any other data that may be helpful in debugging.

Some relevant parts of glxinfo:

OpenGL vendor string: X.Org
OpenGL renderer string: Gallium 0.4 on AMD RV770
OpenGL version string: 2.1 Mesa 8.1-devel (git-1a33c1b precise-oibaf-ppa)

Best regards,
Marko

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