Module: Mesa
Branch: master
Commit: 3a7f95b3aa7397aa8a118d2634fdc5cf8f84f989
URL:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=3a7f95b3aa7397aa8a118d2634fdc5cf8f84f989
Author: Matt Turner <matts...@gmail.com>
Date: Tue Dec 1 16:13:11 2015 -0800
nir: Optimize useless comparisons against true/false.
Reviewed-by: Jason Ekstrand <jason.ekstr...@intel.com> [v1]
Reviewed-by: Eric Anholt <e...@anholt.net> [v1]
v2: Move new rule to Boolean simplification section
Add a a@bool != true simplification
Suggested-by: Neil Roberts <n...@linux.intel.com>
---
src/glsl/nir/nir_opt_algebraic.py | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/src/glsl/nir/nir_opt_algebraic.py
b/src/glsl/nir/nir_opt_algebraic.py
index 6aa8b1f..cb715c0 100644
--- a/src/glsl/nir/nir_opt_algebraic.py
+++ b/src/glsl/nir/nir_opt_algebraic.py
@@ -184,8 +184,10 @@ optimizations = [
(('fsqrt', a), ('frcp', ('frsq', a)), 'options->lower_fsqrt'),
(('frcp', ('frsq', a)), ('fsqrt', a), '!options->lower_fsqrt'),
# Boolean simplifications
- (('ine', 'a@bool', 0), 'a'),
- (('ieq', 'a@bool', 0), ('inot', 'a')),
+ (('ieq', 'a@bool', True), a),
+ (('ine', 'a@bool', True), ('inot', a)),
+ (('ine', 'a@bool', False), a),
+ (('ieq', 'a@bool', False), ('inot', 'a')),
(('bcsel', a, True, False), ('ine', a, 0)),
(('bcsel', a, False, True), ('ieq', a, 0)),
(('bcsel', True, b, c), b),
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