[Mesa-dev] [PATCH v2] nir: add a comparison simplification

[Samuel Pitoiset]

shader stats?

On 03/16/2018 06:48 AM, Timothy Arceri wrote:
> These can be found in the Tomb Raider shaders, eliminating them
> helps unroll more loops.
> ---
>   src/compiler/nir/nir_opt_algebraic.py | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/src/compiler/nir/nir_opt_algebraic.py b/src/compiler/nir/nir_opt_algebraic.py
> index c9575e6be4..2148bc121b 100644
> --- a/src/compiler/nir/nir_opt_algebraic.py
> +++ b/src/compiler/nir/nir_opt_algebraic.py
> @@ -152,6 +152,7 @@ optimizations = [
>      (('inot', ('ige', a, b)), ('ilt', a, b)),
>      (('inot', ('ieq', a, b)), ('ine', a, b)),
>      (('inot', ('ine', a, b)), ('ieq', a, b)),
> +   (('ine', ('b2i', 'a at bool'), 0), 'a'),
>   
>      # 0.0 >= b2f(a)
>      # b2f(a) <= 0.0
>