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nir/algebraic: optimize (a < 0.0) ? -a : a -> fabs(a) 

Totals from affected shaders: (VEGA)
SGPRS: 13920 -> 13920 (0.00 %)
VGPRS: 10252 -> 10252 (0.00 %)
Spilled SGPRs: 62 -> 62 (0.00 %)
Spilled VGPRs: 0 -> 0 (0.00 %)
Private memory VGPRs: 0 -> 0 (0.00 %)
Scratch size: 0 -> 0 (0.00 %) dwords per thread
Code Size: 587648 -> 587224 (-0.07 %) bytes
LDS: 5 -> 5 (0.00 %) blocks
Max Waves: 1489 -> 1489 (0.00 %)

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4830>
This commit is contained in:
Daniel Schürmann 2020-04-30 10:58:08 +01:00 committed by Marge Bot
parent 9d22c5ed71
commit 70d3efeb88
1 changed files with 1 additions and 0 deletions
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src/compiler/nir/nir_opt_algebraic.py
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@ -1136,6 +1136,7 @@ optimizations.extend([
(('~fmul', ('bcsel(is_used_once)', c, -1.0, 1.0), b), ('bcsel', c, ('fneg', b), b)),
(('~fmul', ('bcsel(is_used_once)', c, 1.0, -1.0), b), ('bcsel', c, b, ('fneg', b))),
(('~bcsel', ('flt', a, 0.0), ('fneg', a), a), ('fabs', a)),
(('fmin3@64', a, b, c), ('fmin@64', a, ('fmin@64', b, c))),
(('fmax3@64', a, b, c), ('fmax@64', a, ('fmax@64', b, c))),