[Mesa-dev] [PATCH 04/12] nir: add is_simple_for_loop() helper

[Thomas Helland]

This patch is:

Reviewed-by: Thomas Helland <thomashelland90 at gmail.com>

2016-08-27 8:03 GMT+02:00 Timothy Arceri <timothy.arceri at collabora.com>:
> This will be used by the loop unroll and lcssa passes.
> ---
>  src/compiler/nir/nir.h | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> diff --git a/src/compiler/nir/nir.h b/src/compiler/nir/nir.h
> index f85e829..6b0a73f 100644
> --- a/src/compiler/nir/nir.h
> +++ b/src/compiler/nir/nir.h
> @@ -2614,6 +2614,14 @@ bool nir_normalize_cubemap_coords(nir_shader *shader);
>
>  void nir_live_ssa_defs_impl(nir_function_impl *impl);
>
> +static inline bool
> +is_simple_for_loop(nir_shader *shader, nir_loop_info *li)
> +{
> +   unsigned max_iter = shader->options->max_unroll_iterations;
> +   return li->is_trip_count_known && li->trip_count < max_iter &&
> +          list_is_singular(&li->loop_terminator_list);
> +}
> +
>  void nir_loop_analyze_impl(nir_function_impl *impl);
>  void nir_loop_analyze(nir_shader *shader);
>
> --
> 2.7.4
>
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