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nir/opt_algebraic: remove min(a, >= 1.0) before fsat

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Foz-DB Navi48:
Totals from 86 (0.08% of 114655) affected shaders:
Instrs: 217553 -> 217408 (-0.07%); split: -0.07%, +0.01%
CodeSize: 1159992 -> 1159380 (-0.05%); split: -0.06%, +0.01%
Latency: 1657600 -> 1657533 (-0.00%); split: -0.01%, +0.00%
InvThroughput: 203205 -> 203178 (-0.01%); split: -0.02%, +0.00%
SClause: 5245 -> 5244 (-0.02%)
Copies: 13726 -> 13716 (-0.07%); split: -0.14%, +0.07%
VALU: 130151 -> 130039 (-0.09%); split: -0.09%, +0.00%
SALU: 26476 -> 26474 (-0.01%); split: -0.02%, +0.01%

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40281>
This commit is contained in:
Georg Lehmann 2026-03-07 13:05:41 +01:00 • committed by Marge Bot
parent 108a4d4341
commit 6936282bd3
1 changed files with 2 additions and 0 deletions
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2
src/compiler/nir/nir_opt_algebraic.py
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@ -1073,6 +1073,8 @@ optimizations.extend([
(('fmax', 'a(is_le_pos_one)', 0.0), ('fsat', a), '!options->lower_fsat'),
(('fsat', ('fmax', a, 'b(is_not_positive)')), ('fsat', a)),
(('fsat', ('fmin(nnan)', a, 'b(is_ge_pos_one)')), ('fsat', a)),
(('fsat', ('fmin', 'a(is_a_number)', 'b(is_ge_pos_one)')), ('fsat', a)),
(('fsat', ('bcsel(is_used_once)', a, b, '#c')), ('bcsel', a, ('fsat', b), ('fsat', c))),
(('fsat', ('bcsel(is_used_once)', a, '#b', c)), ('bcsel', a, ('fsat', b), ('fsat', c))),