[Mesa-dev] [PATCH V2 4/4] nir: add a couple of ior opts to nir_opt_algebraic

[Timothy Arceri]

One of these was seen in a Deus Ex shader.

V2: make opts more generic.

Cc: Jason Ekstrand <jason at jlekstrand.net>
---
 src/compiler/nir/nir_opt_algebraic.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py
index 0986dde6851..a9c2d821d7d 100644
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -286,6 +286,9 @@ optimizations = [
    (('iand', ('uge(is_used_once)', a, b), ('uge', a, c)), ('uge', a, ('umax', b, c))),
    (('iand', ('uge(is_used_once)', a, c), ('uge', b, c)), ('uge', ('umin', a, b), c)),
 
+   (('ior', 'a at bool', ('ieq', a, False)), True),
+   (('ior', 'a at bool', ('inot', a)), True),
+
    (('iand', ('ieq', 'a at 32', 0), ('ieq', 'b at 32', 0)), ('ieq', ('ior', 'a at 32', 'b at 32'), 0)),
 
    # These patterns can result when (a < b || a < c) => (a < min(b, c))
-- 
2.17.1