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nir/opt_algebraic: remove fneg around fmin/fmax

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Foz-DB Navi21:
Totals from 282 (0.35% of 80255) affected shaders:
Instrs: 310515 -> 309755 (-0.24%)
CodeSize: 1721236 -> 1714540 (-0.39%)
Latency: 1366446 -> 1365141 (-0.10%); split: -0.10%, +0.00%
InvThroughput: 352528 -> 351097 (-0.41%); split: -0.41%, +0.00%
Copies: 24623 -> 24630 (+0.03%)
VALU: 231716 -> 230951 (-0.33%)
SALU: 28774 -> 28779 (+0.02%)

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36535>
This commit is contained in:
Georg Lehmann 2025-08-01 21:16:40 +02:00 • committed by Marge Bot
parent df2ca53393
commit 22afe83473
1 changed files with 6 additions and 0 deletions
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6
src/compiler/nir/nir_opt_algebraic.py
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@ -918,6 +918,12 @@ optimizations.extend([
(('fmin(nsz)', 'a(is_a_number_not_positive)', 'b(is_not_negative)'), ('fmul', a, 1.0)),
(('fmax', 'a(is_a_number_not_negative)', 'b(is_lt_zero)'), ('fmul', a, 1.0)),
(('fmin', 'a(is_a_number_not_positive)', 'b(is_gt_zero)'), ('fmul', a, 1.0)),
(('fneg', ('fmax(is_used_once)', ('fneg', a), ('fneg', b))), ('fmin', a, b)),
(('fneg', ('fmin(is_used_once)', ('fneg', a), ('fneg', b))), ('fmax', a, b)),
(('fneg', ('fmax(is_used_once)', ('fneg', a), '#b')), ('fmin', a, ('fneg', b))),
(('fneg', ('fmin(is_used_once)', ('fneg', a), '#b')), ('fmax', a, ('fneg', b))),
(('fmin(nsz)', a, '#b(is_negative_zero)'), ('fmin', a, 0.0)),
(('fmax(nsz)', a, '#b(is_negative_zero)'), ('fmax', a, 0.0)),
])
for op in ['ine', 'ieq', 'ilt', 'ige', 'ult', 'uge', 'bitz', 'bitnz',