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nir/opt_algebraic: Optimize [ui](add|sub)_sat with 0.

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Signed-off-by: Georg Lehmann <dadschoorse@gmail.com>
Reviewed-by: Emma Anholt <emma@anholt.net>
Reviewed-by: Jason Ekstrand <jason.ekstrand@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17468>
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Georg Lehmann 2022-07-11 20:55:37 +02:00 • committed by Marge Bot
parent 90a8fb0355
commit aac8ddae2f
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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@ -144,6 +144,10 @@ optimizations = [
(('fadd(is_only_used_as_float)', 'a@16', 0.0), a, '!'+signed_zero_inf_nan_preserve_16),
(('fadd(is_only_used_as_float)', 'a@32', 0.0), a, '!'+signed_zero_inf_nan_preserve_32),
(('iadd', a, 0), a),
(('iadd_sat', a, 0), a),
(('isub_sat', a, 0), a),
(('uadd_sat', a, 0), a),
(('usub_sat', a, 0), a),
(('usadd_4x8_vc4', a, 0), a),
(('usadd_4x8_vc4', a, ~0), ~0),
(('~fadd', ('fmul', a, b), ('fmul', a, c)), ('fmul', a, ('fadd', b, c))),