[Bug 45901] New: [r300g, bisected] vs-atan-float-float fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=45901

             Bug #: 45901
           Summary: [r300g, bisected] vs-atan-float-float fail
    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: bryancain3+fdo at gmail.com


I did found this when comparing piglit results between 7.11 and 8.0. 
With 7.11 this test pass, however merge base was failing so i did a bisect to see what commit fixed this, it was the commit
7d2ff4ae773f2299239d7e1356cb313c11e442a8 so I started another bisect between     b1b4ea0b3679db0b8fddaa9663a10d4712bba3b7 (corresponding commit on master) and
current head, which ended in  

f379d8f73063a4c4d6cf379318c6b37118d46bfa is the first bad commit
commit f379d8f73063a4c4d6cf379318c6b37118d46bfa
Author: Bryan Cain <bryancain3 at gmail.com>
Date:   Mon Apr 25 23:37:47 2011 -050

    st/mesa: Add a GLSL IR to TGSI translator.

    It is still a work in progress at this point, but it produces working and
    reasonably well-optimized code.

    Originally based on ir_to_mesa and st_mesa_to_tgsi, but does not directly use
    Mesa IR instructions in TGSI generation, instead generating TGSI from the
    intermediate class glsl_to_tgsi_instruction.  It also has new optimization
    passes to replace _mesa_optimize_program.


GPU: RV530
Kernel: 3.2.3
Libdrm: 2.4.31
xf86-video-ati: e20284409937d784847339b5d466a95012d85940

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