[Bug 81366] New: [IVB/HSW/BYT-M bisected]GpuTest GiMark render error

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=81366

          Priority: medium
            Bug ID: 81366
          Assignee: idr at freedesktop.org
           Summary: [IVB/HSW/BYT-M bisected]GpuTest GiMark render error
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: mengmeng.meng at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: Drivers/DRI/i965
           Product: Mesa

System Environment:
--------------------------
Mesa:  (master)923f78440c29644f31d745d6fbd4eaad8676973f
Xserver:(master)xorg-server-1.15.99.902-121-g2f5cf9ff9a0f713b7e038636484c77f113
Xf86_video_intel:master)2.99.912-229-ge0523ade28fa0da00d0bd70d8b22d53ed4e49f73
Kernel:    (drm-intel-nightly) git-271bff.

Bug detailed description:
----------------------------
GpuTest GiMark render error on IVB/HSW/BYT-M. The issue exists on gnome-session
and Raw X. Please see the png and Xorg.0.log.
It's Mesa regression, bisecting show the first bad commit is 
commit 1d9f74eda75da05b4d5c7df5fc1e6f5ab8d88322
Author:     Matt Turner <mattst88 at gmail.com>
AuthorDate: Fri Feb 28 20:11:32 2014 -0800
Commit:     Matt Turner <mattst88 at gmail.com>
CommitDate: Thu Jun 19 16:11:51 2014 -0700

    glsl: Rebalance expression trees that are reduction operations.

Reproduce steps:
-------------------------
1. xinit
2. MESA_GL_VERSION_OVERRIDE=3.0 ./GpuTest /test=gi

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