[Mesa-dev] [PATCH 3/5] nir: When faced with a csel on !condition, just flip the arguments.

[Eric Anholt]

total NIR instructions in shared programs: 39426 -> 39411 (-0.04%)
NIR instructions in affected programs:     3748 -> 3733 (-0.40%)
---
 src/glsl/nir/nir_opt_algebraic.py | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/glsl/nir/nir_opt_algebraic.py b/src/glsl/nir/nir_opt_algebraic.py
index dd4557f..d4869c7 100644
--- a/src/glsl/nir/nir_opt_algebraic.py
+++ b/src/glsl/nir/nir_opt_algebraic.py
@@ -86,6 +86,7 @@ optimizations = [
    (('fge', ('fneg', ('fabs', a)), 0.0), ('feq', a, 0.0)),
    (('bcsel', ('flt', a, b), a, b), ('fmin', a, b)),
    (('bcsel', ('flt', a, b), b, a), ('fmax', a, b)),
+   (('bcsel', ('inot', 'a at bool'), b, c), ('bcsel', a, c, b)),
    (('fmin', ('fmax', a, 0.0), 1.0), ('fsat', a), '!options->lower_fsat'),
    (('fsat', a), ('fmin', ('fmax', a, 0.0), 1.0), 'options->lower_fsat'),
    (('fsat', ('fsat', a)), ('fsat', a)),
-- 
2.1.4