[Bug 89961] New: [BDW Bisected]

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89961

            Bug ID: 89961
           Summary: [BDW Bisected]
           Product: Mesa
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: wendy.wang at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 114970
  --> https://bugs.freedesktop.org/attachment.cgi?id=114970&action=edit
Xorg.log

Test Environment
--------------------
Failed Platform: Broadwell

Failed GFX SW stack
Libdrm:       
(master)libdrm-2.4.60-18-gbc6b5174d362a01f6d638a4db6aaf2fd355db69c
 Mesa:        (master)8f7338f284cdb1fef64c85e3293d2200d0cc6387
 Xserver:       
(master)xorg-server-1.17.0-72-gf1da6bf5d94911e78d2e27e6accf0c6e3aefb331
 Xf86_video_intel:       
(master)2.99.917-219-g745c21fb1aa1fcd54e9a9aeaa7fe6877af39f2f1
 Cairo:        (master)71392653803277cec6deea9e7aa4696f8b22dd73
 Kernel:   (drm-intel-nightly)d72ff1ab1499711c941831400629c14493313b3a

Mesa Regression: Yes

First bad commit is:
commit 47c4b3854076adfe5a27b537f36262ac4ec4530d
Author:     Matt Turner <mattst88 at gmail.com>
AuthorDate: Tue Jan 27 19:18:46 2015 -0800
Commit:     Matt Turner <mattst88 at gmail.com>
CommitDate: Tue Mar 31 14:14:36 2015 -0700

    i965/fs: Allow CSE to handle MULs with negated arguments.

    mul x, -y is equivalent to mul -x, y; and mul x, y is the negation of
    mul x, -y.

    With NIR:
    total instructions in shared programs: 6167779 -> 6161193 (-0.11%)
    instructions in affected programs:     983511 -> 976925 (-0.67%)
    helped:                                4106
    HURT:                                  16
    GAINED:                                18
    LOST:                                  7

    Without NIR:
    total instructions in shared programs: 6192323 -> 6185299 (-0.11%)
    instructions in affected programs:     987875 -> 980851 (-0.71%)
    helped:                                4146
    HURT:                                  16
    GAINED:                                16
    LOST:                                  0



Bug Description
4 Synmark2_v6 cases have been impacted by the bad commit: Image validation will
fail when running case, we cannot get the performance data for these 4 cases on
BDW now.
OglDrvRes
OglDrvShComp
OglDrvState
OglPSPom

root at x-bdw21:/usr/local/games/OpenGL/SynMark2_6# ./synmark2 OglDrvRes
-- SynMark2 6.0.0 -- 10:04:57 04/09/15 --
Test name: OglDrvRes
Config name: Default
Validation: Failed - different (1.219 %), different (0.915 %)
OglDrvRes: Image validation failed - different (1.219 %), different (0.915 %)

Reproduce step:
1. cd /usr/local/games/OpenGL/SynMark2_6
2. ./synmark2 OglDrvRes

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