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nir: Recognize i2b(b2i(x)) as x.
authorMatt Turner <mattst88@gmail.com>
Wed, 6 May 2015 02:56:27 +0000 (19:56 -0700)
committerMatt Turner <mattst88@gmail.com>
Thu, 7 May 2015 17:51:05 +0000 (10:51 -0700)
Helps the same set of programs as the previous commit.

instructions in affected programs:     4490 -> 4346 (-3.21%)
helped:                                8

Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Glenn Kennard <glenn.kennard@gmail.com>
src/glsl/nir/nir_opt_algebraic.py patch | blob | history

diff --git a/src/glsl/nir/nir_opt_algebraic.py b/src/glsl/nir/nir_opt_algebraic.py
index 92928cf3a1dc1cd340d5eeb32e901e9d78cadd36..fda4bd5b6ffae1f97d04b801e4c872651b92913f 100644 (file)
--- a/src/glsl/nir/nir_opt_algebraic.py
+++ b/src/glsl/nir/nir_opt_algebraic.py
@@ -188,6 +188,7 @@ optimizations = [
    (('fcsel', a, b, b), b),
 
    # Conversions
+   (('i2b', ('b2i', a)), a),
    (('f2i', ('ftrunc', a)), ('f2i', a)),
    (('f2u', ('ftrunc', a)), ('f2u', a)),