[Bug 78875] New: [ILK Bisected]Webglc conformance/uniforms/uniform-default-values.html fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78875

          Priority: high
            Bug ID: 78875
                CC: idr at freedesktop.org
          Assignee: eric at anholt.net
           Summary: [ILK Bisected]Webglc
                    conformance/uniforms/uniform-default-values.html fails
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: major
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: Drivers/DRI/i965
           Product: Mesa

System Environment:
--------------------------
Platform: Ironlake
Libdrm:    (master)libdrm-2.4.54-8-g305478ce02ebd908a75c9830ecea15f6e2469b42
Mesa:    (master)5646319f25c7880b3706bb7590e24c84fd8de0fc
Xserver:(master)xorg-server-1.15.99.902-91-g01e18af17f8dc91451fbd0902049045afd1cea7e
Xf86_video_intel:(master)2.99.911-173-gdf297e9fafe1a7de1036f3151f93de67661c2a4e
Libva:    (staging)968ade9411de9c5ae2eead0a7e8755747a32a3a2
Libva_intel_driver:        (staging)1c4d3468229797e787f4b99b0729baf90a115a1d
Kernel:    (drm-intel-nightly)f79ba79cf037eea9ee757ad37730b00f43d5ef80

Bug detailed description:
-----------------------------
It fails on Ironlake with Mesa master, works well on 10.2 branch.

Bisect shows: afe3d1556f6b77031f7025309511a0eea2a3e8df is the first bad commit
commit afe3d1556f6b77031f7025309511a0eea2a3e8df
Author:     Eric Anholt <eric at anholt.net>
AuthorDate: Tue May 6 15:19:55 2014 -0700
Commit:     Eric Anholt <eric at anholt.net>
CommitDate: Mon May 12 09:50:32 2014 -0700

    i965: Stop doing remapping of "special" regs.

    Now that we aren't using pixel_[xy] in live variables, nothing is looking
    at these regs after the visitor stage.

    Reviewed-by: Matt Turner <mattst88 at gmail.com>
    Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

Reproduce steps:
---------------------------- 
1. xinit
2. go to
https://www.khronos.org/registry/webgl/conformance-suites/1.0.2/webgl-conformance-tests.html
run conformance/uniforms/uniform-default-values.html

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