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nir: Move the compare-with-zero optimizations to the late section

Browse source 
total instructions in shared programs: 4422307 -> 4422363 (0.00%)
instructions in affected programs:     4230 -> 4286 (1.32%)
helped:                                0
HURT:                                  12

While this does hurt some things, the losses are minor and it prevents the
compare-with-zero optimization from fighting with ffma which is much more
important.

Reviewed-by: Matt Turner <mattst88@gmail.com>
This commit is contained in:
Jason Ekstrand 2015-03-23 17:36:22 -07:00
parent da294f9b2f
commit e06a3d0282
1 changed files with 4 additions and 4 deletions
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8
src/glsl/nir/nir_opt_algebraic.py
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@ -83,10 +83,6 @@ optimizations = [
(('inot', ('fge', a, b)), ('flt', a, b)),
(('inot', ('ilt', a, b)), ('ige', a, b)),
(('inot', ('ige', a, b)), ('ilt', a, b)),
(('flt', ('fadd', a, b), 0.0), ('flt', a, ('fneg', b))),
(('fge', ('fadd', a, b), 0.0), ('fge', a, ('fneg', b))),
(('feq', ('fadd', a, b), 0.0), ('feq', a, ('fneg', b))),
(('fne', ('fadd', a, b), 0.0), ('fne', a, ('fneg', b))),
(('fge', ('fneg', ('fabs', a)), 0.0), ('feq', a, 0.0)),
(('bcsel', ('flt', a, b), a, b), ('fmin', a, b)),
(('bcsel', ('flt', a, b), b, a), ('fmax', a, b)),
@ -200,6 +196,10 @@ for op in ['flt', 'fge', 'feq', 'fne',
# they help code generation but do not necessarily produce code that is
# more easily optimizable.
late_optimizations = [
(('flt', ('fadd', a, b), 0.0), ('flt', a, ('fneg', b))),
(('fge', ('fadd', a, b), 0.0), ('fge', a, ('fneg', b))),
(('feq', ('fadd', a, b), 0.0), ('feq', a, ('fneg', b))),
(('fne', ('fadd', a, b), 0.0), ('fne', a, ('fneg', b))),
]
print nir_algebraic.AlgebraicPass("nir_opt_algebraic", optimizations).render()