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nir: Recognize (a < b || a < c) as a < max(b, c).

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Doesn't work for analogous && cases, because of NaNs.

total instructions in shared programs: 6195712 -> 6194829 (-0.01%)
instructions in affected programs:     42000 -> 41117 (-2.10%)
helped:                                403

Reviewed-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Matt Turner 2015-03-26 10:09:21 -07:00
parent a2b6e908cf
commit 97e6c1b957
1 changed files with 2 additions and 0 deletions
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2
src/glsl/nir/nir_opt_algebraic.py
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@ -94,6 +94,8 @@ optimizations = [
(('fsat', a), ('fmin', ('fmax', a, 0.0), 1.0), 'options->lower_fsat'), (('fsat', a), ('fmin', ('fmax', a, 0.0), 1.0), 'options->lower_fsat'),
(('fsat', ('fsat', a)), ('fsat', a)), (('fsat', ('fsat', a)), ('fsat', a)),
(('fmin', ('fmax', ('fmin', ('fmax', a, 0.0), 1.0), 0.0), 1.0), ('fmin', ('fmax', a, 0.0), 1.0)), (('fmin', ('fmax', ('fmin', ('fmax', a, 0.0), 1.0), 0.0), 1.0), ('fmin', ('fmax', a, 0.0), 1.0)),
(('ior', ('flt', a, b), ('flt', a, c)), ('flt', a, ('fmax', b, c))),
(('ior', ('fge', a, b), ('fge', a, c)), ('fge', a, ('fmin', b, c))),
# Emulating booleans # Emulating booleans
(('fmul', ('b2f', a), ('b2f', b)), ('b2f', ('iand', a, b))), (('fmul', ('b2f', a), ('b2f', b)), ('b2f', ('iand', a, b))),
(('fsat', ('fadd', ('b2f', a), ('b2f', b))), ('b2f', ('ior', a, b))), (('fsat', ('fadd', ('b2f', a), ('b2f', b))), ('b2f', ('ior', a, b))),