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nir/algebraic: add optimization pattern for ('ult', a, ('and', b, a)) and friends.

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These optimizations are based on the fact that
'and(a,b) <= umin(a,b)'.
For AMD, this series moves the optimization from LLVM to NIR,
so currently no vkpipeline-db changes here.

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This commit is contained in:
Daniel Schürmann 2019-01-25 12:48:44 +01:00 • committed by Daniel Schürmann
parent fa6ea16a8d
commit a74f256c58
1 changed files with 4 additions and 0 deletions
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4
src/compiler/nir/nir_opt_algebraic.py
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@ -497,6 +497,10 @@ optimizations = [
(('ult', ('umax', a, b), a), False),
(('uge', a, ('umax', b, a)), ('uge', a, b)),
(('uge', ('umin', a, b), a), ('uge', b, a)),
(('ult', a, ('iand', b, a)), False),
(('ult', ('ior', a, b), a), False),
(('uge', a, ('iand', b, a)), True),
(('uge', ('ior', a, b), a), True),
(('ilt', '#a', ('imax', '#b', c)), ('ior', ('ilt', a, b), ('ilt', a, c))),
(('ilt', ('imin', '#a', b), '#c'), ('ior', ('ilt', a, c), ('ilt', b, c))),