[Bug 36723] New: [r300g, bisected] Unigine Sanctuary: fog is not rendered properly

[bugzilla-daemon@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=36723

           Summary: [r300g, bisected] Unigine Sanctuary: fog is not
                    rendered properly
           Product: Mesa
           Version: git
          Platform: All
               URL: http://www.unigine.com/download/#sanctuary
        OS/Version: Linux (All)
            Status: NEW
          Keywords: regression
          Severity: minor
          Priority: medium
         Component: Drivers/Gallium/r300
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: pavel.ondracka@email.cz


Created an attachment (id=46198)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=46198)
screenshot of the problem

Fog in Unigine Sanctuary is not rendered properly, there are some "stripes" in
the fog, which weren't present before. Screenshot attached.

fe622bac0c1b5b9f2a9fcf9f35b51232a06bea42 is the first bad commit
commit fe622bac0c1b5b9f2a9fcf9f35b51232a06bea42
Author: Tom Stellard <tstellar@gmail.com>
Date:   Tue Jan 11 00:05:08 2011 -0800

    r300/compiler: Rewrite register allocator

    The new allocator uses ra and does swizzle packing.

    Also, a data structure (struct rc_variable) and associated functions have
    been added for generating UD and DU chains.

This may also be related to the floating textures, since the fog wasn't
rendered at all before the floating work was committed.

GPU: RV530
mesa: d7cf9833d7138daa1c2acdc489ab0c86c2ea7e41
kernel: 2.6.38.2

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