[Bug 91752] Segmentation fault with specific shader (r600)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91752

            Bug ID: 91752
           Summary: Segmentation fault with specific shader (r600)
           Product: Mesa
           Version: 10.6
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: jonas at wielicki.name
        QA Contact: dri-devel at lists.freedesktop.org

The given apitrace [1] results in a segmentation fault. I am testing this on a
sony notebook with Intel sandybridge integrated GPU and a dedicated radeon.

1) $ xrandr --setprovideroffloadsink radeon Intel
2) $ DRI_PRIME=1 apitrace replay r600-crash-01.trace

Actual Results: Segmentation Fault

Expected Results: The rendering should work correctly.

I could reproduce this with both the mesa-libGL 10.6.3 as shipped by fedora as
well as mesa 11.0.0-rc1 freshly compiled with:

    ./configure --enable-selinux --enable-osmesa --enable-egl --disable-gles1
--enable-gles2 --enable-shared-glapi --enable-gbm --enable-glx-tls
--enable-texture-float=yes --enable-gallium-llvm --enable-llvm-shared-libs
--enable-dri --enable-xa --enable-nine

(flags blindly stolen from the Fedora package specification)

intel GPU:
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09)
radeon GPU:
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Whistler [Radeon HD 6630M/6650M/6750M/7670M/7690M] (rev ff)

The same trace runs without crash on the Intel.

   [1]:
http://sotecware.net/files/persistent/fdo-mesa-r600-bugs/r600-crash-01.trace

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