From bae0c3675174b63c7d7e25556266027b2d4f2b87 Mon Sep 17 00:00:00 2001 From: Ian Romanick Date: Fri, 1 Mar 2019 14:41:59 -0800 Subject: [PATCH] nir/algebraic: Optimize away an fsat of a b2f The b2f can only produce 0.0 or 1.0, so the fsat does nothing. Reviewed-by: Kenneth Graunke --- src/compiler/nir/nir_opt_algebraic.py | 1 + 1 file changed, 1 insertion(+) diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py index b49f1a13161..617ca0ea933 100644 --- a/src/compiler/nir/nir_opt_algebraic.py +++ b/src/compiler/nir/nir_opt_algebraic.py @@ -337,6 +337,7 @@ optimizations = [ (('~fmin', ('fmax', a, 0.0), 1.0), ('fsat', a), '!options->lower_fsat'), (('~fmax', ('fmin', a, 1.0), 0.0), ('fsat', a), '!options->lower_fsat'), (('fsat', ('fsign', a)), ('b2f', ('flt', 0.0, a))), + (('fsat', ('b2f', a)), ('b2f', a)), (('fsat', a), ('fmin', ('fmax', a, 0.0), 1.0), 'options->lower_fsat'), (('fsat', ('fsat', a)), ('fsat', a)), (('fmin', ('fmax', ('fmin', ('fmax', a, b), c), b), c), ('fmin', ('fmax', a, b), c)), -- 2.30.2