From: Jason Ekstrand <jason.ekstrand@intel.com>
Date: Mon, 23 Jul 2018 07:35:02 +0000 (-0700)
Subject: nir: Add a couple of iand/ior optimizations
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b3b170ade9cc3abe6b861a549292c9ec230844bc;p=mesa.git

nir: Add a couple of iand/ior optimizations

Spotted in a shader in Batman: Arkham City.

Reviewed-by: Timothy Arceri <tarceri@itsqueeze.com>
---

diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py
index ba277fdfd0e..7fc4ff1d407 100644
--- a/src/compiler/nir/nir_opt_algebraic.py
+++ b/src/compiler/nir/nir_opt_algebraic.py
@@ -377,6 +377,10 @@ optimizations = [
    (('ixor', a, a), 0),
    (('ixor', a, 0), a),
    (('inot', ('inot', a)), a),
+   (('ior', ('iand', a, b), b), b),
+   (('ior', ('ior', a, b), b), ('ior', a, b)),
+   (('iand', ('ior', a, b), b), b),
+   (('iand', ('iand', a, b), b), ('iand', a, b)),
    # DeMorgan's Laws
    (('iand', ('inot', a), ('inot', b)), ('inot', ('ior',  a, b))),
    (('ior',  ('inot', a), ('inot', b)), ('inot', ('iand', a, b))),