[Mesa-dev] [PATCH] nir: Optimize useless comparisons against true/false.

Eric Anholt eric at anholt.net
Thu Dec 3 16:05:25 PST 2015

Matt Turner <mattst88 at gmail.com> writes:

> ---
> I add the true/false variables for clarity since there are some existing
> optimizations using ~0 where it actually has nothing to do with true.
> I could take it or leave it. We obviously can't use them for feq and
> friends. Maybe itrue/ifalse and ftrue/ffalse?

No changes on my shader-db, but glsl-fs-all-01.shader_test emits a lot
fewer instructions.  For either version:

Reviewed-by: Eric Anholt <eric at anholt.net>
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