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nir/algebraic: Mark some more logic-joined comparison reductions as exact

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If the values are known to be numbers, the the replacements are exact.
This is only applied to the patterns with constants.  Constants should
always be numbers, and shaders with NaN constants should be handled in a
different way.

No shader-db or fossil-db changes on any Intel platform.  The intention
is to make these patterns more future proof.

Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10012>
This commit is contained in:
Ian Romanick 2021-01-28 18:15:26 -08:00 • committed by Marge Bot
parent 23bbf3932b
commit adc2835646
1 changed files with 4 additions and 4 deletions
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8
src/compiler/nir/nir_opt_algebraic.py
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@ -663,10 +663,10 @@ optimizations.extend([
(('~iand', ('flt(is_used_once)', a, c), ('flt', b, c)), ('flt', ('fmax', a, b), c)),
(('~iand', ('fge(is_used_once)', a, b), ('fge', a, c)), ('fge', a, ('fmax', b, c))),
(('~iand', ('fge(is_used_once)', a, c), ('fge', b, c)), ('fge', ('fmin', a, b), c)),
(('~iand', ('flt', a, '#b'), ('flt', a, '#c')), ('flt', a, ('fmin', b, c))),
(('~iand', ('flt', '#a', c), ('flt', '#b', c)), ('flt', ('fmax', a, b), c)),
(('~iand', ('fge', a, '#b'), ('fge', a, '#c')), ('fge', a, ('fmax', b, c))),
(('~iand', ('fge', '#a', c), ('fge', '#b', c)), ('fge', ('fmin', a, b), c)),
(('iand', ('flt', a, '#b(is_a_number)'), ('flt', a, '#c(is_a_number)')), ('flt', a, ('fmin', b, c))),
(('iand', ('flt', '#a(is_a_number)', c), ('flt', '#b(is_a_number)', c)), ('flt', ('fmax', a, b), c)),
(('iand', ('fge', a, '#b(is_a_number)'), ('fge', a, '#c(is_a_number)')), ('fge', a, ('fmax', b, c))),
(('iand', ('fge', '#a(is_a_number)', c), ('fge', '#b(is_a_number)', c)), ('fge', ('fmin', a, b), c)),
(('ior', ('ilt(is_used_once)', a, b), ('ilt', a, c)), ('ilt', a, ('imax', b, c))),
(('ior', ('ilt(is_used_once)', a, c), ('ilt', b, c)), ('ilt', ('imin', a, b), c)),