[Bug 93566] Shadow of Mordor is fading to white with Intel Mesa driver

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93566

--- Comment #6 from Kenneth Graunke <kenneth at whitecape.org> ---
nir_opt_algebraic was converting log2(a) - log2(b) into log2(a/b).  We were
still relying on GLSL IR for fdiv lowering, which happens before NIR, so this
fdiv actually made it to the backend.  I've written a patch to do fdiv lowering
in NIR.

With all of those fixes, it seems to be running with no fade-to-white.  Feel
free to give my 'mordor' branch a try:

http://cgit.freedesktop.org/~kwg/mesa/log/?h=mordor

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