diff options
| author | Ian Romanick <[email protected]> | 2018-05-31 12:56:00 -0700 |
|---|---|---|
| committer | Ian Romanick <[email protected]> | 2018-06-01 10:14:53 -0700 |
| commit | f00fcfb7a2e137c7c0064b5e4167bb7fb49537a9 (patch) | |
| tree | 2d04722071db6e10a9c8f16da9389adfc52f96b1 | |
| parent | 619c51722b7978366f15a03bec6751327f2b4b65 (diff) | |
nir: Lower !f2b(x) to x == 0.0
Some trivial help now, but it also prevents ~40 regressions caused by
Samuel's "nir: implement the GLSL equivalent of if simplication in
nir_opt_if" patch.
All Gen4+ platforms had similar results. (Skylake shown)
total instructions in shared programs: 14369557 -> 14369555 (<.01%)
instructions in affected programs: 442 -> 440 (-0.45%)
helped: 2
HURT: 0
total cycles in shared programs: 532425772 -> 532425743 (<.01%)
cycles in affected programs: 6086 -> 6057 (-0.48%)
helped: 2
HURT: 0
Signed-off-by: Ian Romanick <[email protected]>
Reviewed-by: Samuel Pitoiset <[email protected]>
Reviewed-by: Timothy Arceri <[email protected]>
Reviewed-by: Iago Toral Quiroga <[email protected]>
| -rw-r--r-- | src/compiler/nir/nir_opt_algebraic.py | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py index f153570105b..fdfb0250b0b 100644 --- a/src/compiler/nir/nir_opt_algebraic.py +++ b/src/compiler/nir/nir_opt_algebraic.py @@ -441,6 +441,7 @@ optimizations = [ (('i2b', ('iabs', a)), ('i2b', a)), (('fabs', ('b2f', a)), ('b2f', a)), (('iabs', ('b2i', a)), ('b2i', a)), + (('inot', ('f2b', a)), ('feq', a, 0.0)), # Packing and then unpacking does nothing (('unpack_64_2x32_split_x', ('pack_64_2x32_split', a, b)), a), |