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nir/opt_algebraic: push comparisons with constants into bcsel with constant

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Foz-DB Navi21:
Totals from 1657 (2.08% of 79789) affected shaders:
MaxWaves: 30275 -> 30261 (-0.05%); split: +0.01%, -0.05%
Instrs: 3316251 -> 3315701 (-0.02%); split: -0.04%, +0.02%
CodeSize: 17831924 -> 17832020 (+0.00%); split: -0.06%, +0.06%
SpillSGPRs: 815 -> 859 (+5.40%)
SpillVGPRs: 3335 -> 3293 (-1.26%)
Scratch: 231424 -> 230400 (-0.44%)
Latency: 33413310 -> 33402751 (-0.03%); split: -0.04%, +0.01%
InvThroughput: 9116062 -> 9112904 (-0.03%); split: -0.04%, +0.00%
VClause: 65587 -> 65560 (-0.04%); split: -0.05%, +0.01%
SClause: 86208 -> 86261 (+0.06%); split: -0.02%, +0.08%
Copies: 356158 -> 356439 (+0.08%); split: -0.07%, +0.15%
PreSGPRs: 101710 -> 101806 (+0.09%); split: -0.01%, +0.11%
PreVGPRs: 89293 -> 89286 (-0.01%); split: -0.04%, +0.04%
VALU: 2220900 -> 2218839 (-0.09%); split: -0.11%, +0.01%
SALU: 472988 -> 474567 (+0.33%); split: -0.08%, +0.42%
VMEM: 118401 -> 118347 (-0.05%)
SMEM: 123597 -> 123592 (-0.00%)

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 13:14:45 +01:00
committed by Marge Bot
parent 3837bc6d16
commit 7bc3062a3b
1 changed files with 9 additions and 0 deletions
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src/compiler/nir/nir_opt_algebraic.py
+9
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@@ -909,6 +909,15 @@ optimizations.extend([
(('imax', ('imin', a, b), a), a),
])
for op in ['ine', 'ieq', 'ilt', 'ige', 'ult', 'uge', 'bitz', 'bitnz',
'fneu', 'feq', 'flt', 'fge', 'fneo', 'fequ']:
optimizations.extend([
((op, ('bcsel(is_used_once)', a, b, '#c'), '#d'), ('bcsel', a, (op, b, d), (op, c, d))),
((op, ('bcsel(is_used_once)', a, '#b', c), '#d'), ('bcsel', a, (op, b, d), (op, c, d))),
((op, '#d', ('bcsel(is_used_once)', a, b, '#c')), ('bcsel', a, (op, d, b), (op, d, c))),
((op, '#d', ('bcsel(is_used_once)', a, '#b', c)), ('bcsel', a, (op, d, b), (op, d, c))),
])
for N in [8, 16, 32, 64]:
b2iN = 'b2i{0}'.format(N)
optimizations.extend([