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nir: Add opt_algebraic rules for xor with zero.

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instructions in affected programs: 668 -> 664 (-0.60%)
helped: 4

Reviewed-by: Eduardo Lima Mitev <elima@igalia.com>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
This commit is contained in:
Matt Turner 2016-02-01 16:34:46 -08:00
parent 3fd4280759
commit 9f02e3ab03
1 changed files with 2 additions and 0 deletions
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2
src/compiler/nir/nir_opt_algebraic.py
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@ -149,6 +149,8 @@ optimizations = [
(('ior', a, 0), a),
(('fxor', a, a), 0.0),
(('ixor', a, a), 0),
(('fxor', a, 0.0), a),
(('ixor', a, 0), a),
(('inot', ('inot', a)), a),
# DeMorgan's Laws
(('iand', ('inot', a), ('inot', b)), ('inot', ('ior', a, b))),