diff options
| author | Eric Anholt <[email protected]> | 2015-02-20 00:00:27 -0800 |
|---|---|---|
| committer | Eric Anholt <[email protected]> | 2015-02-21 14:57:14 -0800 |
| commit | 4359954d842caa2a9f8d4b50d70ecc789884b68b (patch) | |
| tree | 24e46fe696d1b1e629c35a5bf7c78a43dd96fbf1 /src/glsl | |
| parent | 345c2b288a5f49b82d505eb098847b8e53dde91f (diff) | |
nir: Generalize the optimization of subs of subs from 0.
I initially wrote this based on the "(('fneg', ('fneg', a)), a)" above,
but we can generalize it and make it more potentially useful. In the
specific original case of a 0 for our new 'a' argument, it'll get further
algebraic optimization once the 0 is an argument to the new add.
No shader-db effects.
Reviewed-by: Matt Turner <[email protected]>
Reviewed-by: Connor Abbott <[email protected]>
Diffstat (limited to 'src/glsl')
| -rw-r--r-- | src/glsl/nir/nir_opt_algebraic.py | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/glsl/nir/nir_opt_algebraic.py b/src/glsl/nir/nir_opt_algebraic.py index 3ea6320d36c..7bf6431345a 100644 --- a/src/glsl/nir/nir_opt_algebraic.py +++ b/src/glsl/nir/nir_opt_algebraic.py @@ -151,8 +151,8 @@ optimizations = [ (('fcsel', a, b, b), b), # Subtracts - (('fsub', 0.0, ('fsub', 0.0, a)), a), - (('isub', 0, ('isub', 0, a)), a), + (('fsub', a, ('fsub', 0.0, b)), ('fadd', a, b)), + (('isub', a, ('isub', 0, b)), ('iadd', a, b)), (('fneg', a), ('fsub', 0.0, a), 'options->lower_negate'), (('ineg', a), ('isub', 0, a), 'options->lower_negate'), (('fadd', a, ('fsub', 0.0, b)), ('fsub', a, b)), |