[Bug 89457] [BDW/BSW Regression]ogles3conform ES3-CTS.gtf.GL3Tests.shadow.shadow_execution_vert fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89457

--- Comment #1 from lu hua <huax.lu at intel.com> ---
Bisect shows: ee5fb8d1ba7f50ed94e1a34fa0f6e15a0588145e is the first bad commit
commit ee5fb8d1ba7f50ed94e1a34fa0f6e15a0588145e
Author:     Kristian Høgsberg <krh at bitplanet.net>
AuthorDate: Mon Oct 20 23:29:41 2014 -0700
Commit:     Kristian Høgsberg <krh at bitplanet.net>
CommitDate: Wed Dec 10 12:29:27 2014 -0800

    i965: Generate vs code using scalar backend for BDW+

    With everything in place, we can now use the scalar backend compiler for
    vertex shaders on BDW+.  We make scalar vertex shaders the default on
    BDW+ but add a new vec4vs debug option to force the vec4 backend.

    No piglit regressions.

    Performance impact is minimal, I see a ~1.5 improvement on the T-Rex
    GLBenchmark case, but in general it's in the noise.  Some of our
    internal synthetic, vs bounded benchmarks show great improvement, 20%-40%
    in some cases, but real-world cases are mostly unaffected.

    Signed-off-by: Kristian Høgsberg <krh at bitplanet.net>
    Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

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