[Bug 89457] [BSW Bisected]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 #7 from Ian Romanick <idr at freedesktop.org> ---
(In reply to Ian Romanick from comment #6)
> There are several subtests listed in that .test file (2D, 2DArray, and
> Cube).  Do they all fail, or does just a subset fail?

I guess I could have just read the output. :(

The really weird thing is that the values differ only in the alpha channel. 
However, every path through shadow_execution_2D.vert writes 1.0 to alpha.

Someone will have to sift through the generated assembly... which should be fun
since that shader has a giant switch statement.

Lu: Could you re-test with current master with INTEL_USE_NIR=yes and with
INTEL_USE_NIR=no?  I'm curious whether that will change anything.

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