[Bug 90895] [IVB/HSW/BDW/BSW Bisected] GLB2.7 Egypt, GfxBench3.0 T-Rex & ALU and many SynMark cases performance reduced by 10-23%

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90895

--- Comment #10 from Ben Widawsky <ben at bwidawsk.net> ---
I'm not sure what to do for this one. I really can't justify spending too much
time on this since we know a revert fixes the problem - but I really feel this
is telling us something important we don't yet understand. I'm afraid if we
just revert it, nobody will bother figuring out what's wrong.

Eero, do you think you could do a little more analysis on this, and if we get
nowhere, we can revert?

(I was actually hoping to add some of that gen8 code anyway since it should
help XCOM).

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