nir: Allow feq/fne/ieq/ine to be optimized with inot.

instructions in affected programs:     380 -> 376 (-1.05%)
helped:                                2

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Glenn Kennard <glenn.kennard@gmail.com>

diff --git a/src/glsl/nir/nir_opt_algebraic.py b/src/glsl/nir/nir_opt_algebraic.py
index b0a1f24..400d60e 100644 (file)
--- a/src/glsl/nir/nir_opt_algebraic.py
+++ b/src/glsl/nir/nir_opt_algebraic.py
@@ -83,8 +83,12 @@ optimizations = [
    # Comparison simplifications
    (('inot', ('flt', a, b)), ('fge', a, b)),
    (('inot', ('fge', a, b)), ('flt', a, b)),
+   (('inot', ('feq', a, b)), ('fne', a, b)),
+   (('inot', ('fne', a, b)), ('feq', a, b)),
    (('inot', ('ilt', a, b)), ('ige', a, b)),
    (('inot', ('ige', a, b)), ('ilt', a, b)),
+   (('inot', ('ieq', a, b)), ('ine', a, b)),
+   (('inot', ('ine', a, b)), ('ieq', a, b)),
    (('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)),