[Mesa-dev] [PATCH v2] nir: add a comparison simplification

[Timothy Arceri]

These can be found in the Tomb Raider shaders, eliminating them
helps unroll more loops.
---
 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 c9575e6be4..2148bc121b 100644
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -152,6 +152,7 @@ optimizations = [
    (('inot', ('ige', a, b)), ('ilt', a, b)),
    (('inot', ('ieq', a, b)), ('ine', a, b)),
    (('inot', ('ine', a, b)), ('ieq', a, b)),
+   (('ine', ('b2i', 'a at bool'), 0), 'a'),
 
    # 0.0 >= b2f(a)
    # b2f(a) <= 0.0
-- 
2.14.3