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nir: Add a couple trivial abs optimizations 

Spotted in a shader in Batman: Arkham City.

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This commit is contained in:
Jason Ekstrand 2018-07-22 23:57:07 -07:00
parent 52d831ff83
commit e4d346c86d
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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@ -229,6 +229,8 @@ optimizations = [
(('imax', a, a), a),
(('umin', a, a), a),
(('umax', a, a), a),
(('fmax', a, ('fneg', a)), ('fabs', a)),
(('imax', a, ('ineg', a)), ('iabs', a)),
(('fmin', a, ('fneg', a)), ('fneg', ('fabs', a))),
(('imin', a, ('ineg', a)), ('ineg', ('iabs', a))),
(('fmin', a, ('fneg', ('fabs', a))), ('fneg', ('fabs', a))),