Fold and/or into braa/brao when profitable. Only do this when the and/or
is not used for any non-branch instructions as this would increase total
instruction count.
Add an algebraic nir pass that performs the inverse DeMorgan's laws to
try to bring and/or in front of branches. Again, only do this when the
original inot in only used for branches. This should always decrease
instruction count since the extra inots can be folded into the branch.
Fold inot into branches by using the inv1/inv2 cat0 fields.
Signed-off-by: Job Noorman <jnoorman@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/27411>
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