[Mesa-dev] [PATCH 00/23] nir/i965: Return progress from NIR passes

[Matt Turner]

I started to add support to NIR for something like INTEL_DEBUG=optimizer, but
then realized that a bunch of NIR passes didn't even return progress.

After fixing that, I realized that a bunch of NIR passes didn't preserve
metadata.

Sigh.

I have not tested radv, freedreno, or vc4, but I think that since I did not
replace their OPT_V/NIR_PASS_V everything should work just the same, and allow
them to transition at their leisure.