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nir/opt_algebraic: optimize bcsel of b2f and constants

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Foz-DB Navi21:
Totals from 212 (0.27% of 79789) affected shaders:
MaxWaves: 4024 -> 4030 (+0.15%)
Instrs: 1314134 -> 1313894 (-0.02%); split: -0.03%, +0.02%
CodeSize: 7033216 -> 7026888 (-0.09%); split: -0.10%, +0.01%
VGPRs: 14224 -> 14176 (-0.34%)
Latency: 7402062 -> 7399180 (-0.04%); split: -0.06%, +0.02%
InvThroughput: 1724879 -> 1723773 (-0.06%); split: -0.07%, +0.00%
VClause: 37741 -> 37711 (-0.08%); split: -0.11%, +0.03%
SClause: 29266 -> 29268 (+0.01%); split: -0.01%, +0.01%
Copies: 123810 -> 123786 (-0.02%); split: -0.19%, +0.17%
Branches: 42370 -> 42407 (+0.09%); split: -0.03%, +0.11%
PreSGPRs: 13149 -> 13196 (+0.36%); split: -0.05%, +0.40%
PreVGPRs: 12407 -> 12395 (-0.10%)
VALU: 884471 -> 883475 (-0.11%); split: -0.12%, +0.01%
SALU: 177671 -> 178408 (+0.41%); split: -0.03%, +0.45%

Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33761>
This commit is contained in:
Georg Lehmann 2025-02-20 10:57:03 +01:00 • committed by Marge Bot
parent 4a62f8bc75
commit 2bfcfef5da
1 changed files with 5 additions and 6 deletions
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11
src/compiler/nir/nir_opt_algebraic.py
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@ -734,18 +734,12 @@ optimizations.extend([
(('fge', ('fneg', ('b2f', 'a@1')), 0.0), ('inot', a)),
(('fneu', ('fadd', ('b2f', 'a@1'), ('b2f', 'b@1')), 0.0), ('ior', a, b)),
(('fneu', ('bcsel', a, 1.0, ('b2f', 'b@1')) , 0.0), ('ior', a, b)),
(('fneu', ('b2f', 'a@1'), ('fneg', ('b2f', 'b@1'))), ('ior', a, b)),
(('fneu', ('fmul', ('b2f', 'a@1'), ('b2f', 'b@1')), 0.0), ('iand', a, b)),
(('fneu', ('bcsel', a, ('b2f', 'b@1'), 0.0) , 0.0), ('iand', a, b)),
(('fneu', ('fadd', ('b2f', 'a@1'), ('fneg', ('b2f', 'b@1'))), 0.0), ('ixor', a, b)),
(('fneu', ('b2f', 'a@1') , ('b2f', 'b@1') ), ('ixor', a, b)),
(('fneu', ('fneg', ('b2f', 'a@1')), ('fneg', ('b2f', 'b@1'))), ('ixor', a, b)),
(('feq', ('fadd', ('b2f', 'a@1'), ('b2f', 'b@1')), 0.0), ('inot', ('ior', a, b))),
(('feq', ('bcsel', a, 1.0, ('b2f', 'b@1')) , 0.0), ('inot', ('ior', a, b))),
(('feq', ('b2f', 'a@1'), ('fneg', ('b2f', 'b@1'))), ('inot', ('ior', a, b))),
(('feq', ('fmul', ('b2f', 'a@1'), ('b2f', 'b@1')), 0.0), ('inot', ('iand', a, b))),
(('feq', ('bcsel', a, ('b2f', 'b@1'), 0.0) , 0.0), ('inot', ('iand', a, b))),
(('feq', ('fadd', ('b2f', 'a@1'), ('fneg', ('b2f', 'b@1'))), 0.0), ('ieq', a, b)),
(('feq', ('b2f', 'a@1') , ('b2f', 'b@1') ), ('ieq', a, b)),
(('feq', ('fneg', ('b2f', 'a@1')), ('fneg', ('b2f', 'b@1'))), ('ieq', a, b)),
@ -847,6 +841,11 @@ optimizations.extend([
(('fmin', ('b2f(is_used_once)', 'a@1'), ('b2f', 'b@1')), ('b2f', ('iand', a, b))),
(('fmin', ('fneg(is_used_once)', ('b2f(is_used_once)', 'a@1')), ('fneg', ('b2f', 'b@1'))), ('fneg', ('b2f', ('ior', a, b)))),
(('bcsel', a, ('b2f', 'b@1'), 0), ('b2f', ('bcsel', a, b, False))),
(('bcsel', a, ('b2f', 'b@1'), 1.0), ('b2f', ('bcsel', a, b, True))),
(('bcsel', a, 0, ('b2f', 'b@1')), ('b2f', ('bcsel', a, False, b))),
(('bcsel', a, 1.0, ('b2f', 'b@1')), ('b2f', ('bcsel', a, True, b))),
# fmin(b2f(a), b)
# bcsel(a, fmin(b2f(a), b), fmin(b2f(a), b))
# bcsel(a, fmin(b2f(True), b), fmin(b2f(False), b))