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nir: Optimize (a*b)+(a*c) -> a*(b+c)

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Shader-db i965 instructions:
total instructions in shared programs: 1715894 -> 1710802 (-0.30%)
instructions in affected programs:     443080 -> 437988 (-1.15%)
helped:                                1502
HURT:                                  13
GAINED:                                4
LOST:                                  4

Shader-db NIR instructions:
total instructions in shared programs: 607710 -> 606187 (-0.25%)
instructions in affected programs:     208285 -> 206762 (-0.73%)
helped:                                769
HURT:                                  8
GAINED:                                0
LOST:                                  0

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
Signed-off-by: Thomas Helland <thomashelland90@gmail.com>
This commit is contained in:
Thomas Helland 2015-02-28 20:32:31 +01:00 • committed by Matt Turner
parent 09b0325409
commit 0525f2e851
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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@ -56,6 +56,8 @@ optimizations = [
(('iabs', ('ineg', a)), ('iabs', a)),
(('fadd', a, 0.0), a),
(('iadd', a, 0), a),
(('fadd', ('fmul', a, b), ('fmul', a, c)), ('fmul', a, ('fadd', b, c))),
(('iadd', ('imul', a, b), ('imul', a, c)), ('imul', a, ('iadd', b, c))),
(('fmul', a, 0.0), 0.0),
(('imul', a, 0), 0),
(('fmul', a, 1.0), a),