[Mesa-dev] [Bug 104654] r600/sb: Alien Isolation GPU lock

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104654

            Bug ID: 104654
           Summary: r600/sb: Alien Isolation GPU lock
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: gw.fossdev at gmail.com
        QA Contact: mesa-dev at lists.freedesktop.org

When running Alien Isolation with the sb optimizer it locks up in Mission 10,
in the beginning of the area "Gemini Exoplanet Solutions". With R600_DEBUG=nosb
the problem can be alleviated. 

My first hunch was that the problem lies in sb does not always ending an ALU
clause after a KILL instruction (which according to the HW documentation should
be the case, but after trying to force this I'm not so sure any more, because
this kind of wrong scheduling happens also earlier in the game, even in the
start-up screen.

Graphics card: 6870 HD (barts).
Mesa-version: git 8045f01e2 + some patches to glsl_to_tgsi regarding register
and array merging that should have no influence on r600/sb.

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