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nir: Collapse repeated bcsels on the same argument.

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vc4 results:
total instructions in shared programs: 39881 -> 39794 (-0.22%)
instructions in affected programs:     6302 -> 6215 (-1.38%)

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Connor Abbott <cwabbott0@gmail.com>
This commit is contained in:
Eric Anholt 2015-02-20 01:20:34 -08:00
parent a38038ca5e
commit 345c2b288a
1 changed files with 1 additions and 0 deletions
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src/glsl/nir/nir_opt_algebraic.py
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@ -86,6 +86,7 @@ optimizations = [
(('bcsel', ('flt', a, b), a, b), ('fmin', a, b)),
(('bcsel', ('flt', a, b), b, a), ('fmax', a, b)),
(('bcsel', ('inot', 'a@bool'), b, c), ('bcsel', a, c, b)),
(('bcsel', a, ('bcsel', a, b, c), d), ('bcsel', a, b, d)),
(('fmin', ('fmax', a, 0.0), 1.0), ('fsat', a), '!options->lower_fsat'),
(('fsat', a), ('fmin', ('fmax', a, 0.0), 1.0), 'options->lower_fsat'),
(('fsat', ('fsat', a)), ('fsat', a)),