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authorEric Anholt <eric@anholt.net>2015-02-06 17:12:59 -0800
committerEric Anholt <eric@anholt.net>2015-02-11 11:52:38 -0800
commit56e21647e20db8e3708001a8600c3d8e7d12d841 (patch)
tree07350472cffd88e79d96252f72b179c097337357 /src/glsl
parent2919bdf466295bc3fbf6f6e796ef8d301404d3d9 (diff)
nir: Add algebraic opt for int comparisons with identical operands.
No change on shader-db on i965. v2: Reword the comment due to feedback from Erik Faye-Lund Reviewed-by: Connor Abbott <cwabbott0@gmail.com> (v1) Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com> (v1)
Diffstat (limited to 'src/glsl')
-rw-r--r--src/glsl/nir/nir_opt_algebraic.py9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/glsl/nir/nir_opt_algebraic.py b/src/glsl/nir/nir_opt_algebraic.py
index a5fe19ab988..2b4259e4654 100644
--- a/src/glsl/nir/nir_opt_algebraic.py
+++ b/src/glsl/nir/nir_opt_algebraic.py
@@ -83,6 +83,15 @@ optimizations = [
(('fne', ('fadd', a, b), 0.0), ('fne', a, ('fneg', b))),
(('fge', ('fneg', ('fabs', a)), 0.0), ('feq', a, 0.0)),
(('fmin', ('fmax', a, 0.0), 1.0), ('fsat', a)),
+ # Comparison with the same args. Note that these are not done for
+ # the float versions because NaN always returns false on float
+ # inequalities.
+ (('ilt', a, a), False),
+ (('ige', a, a), True),
+ (('ieq', a, a), True),
+ (('ine', a, a), False),
+ (('ult', a, a), False),
+ (('uge', a, a), True),
# Logical and bit operations
(('fand', a, 0.0), 0.0),
(('iand', a, a), a),