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radeonsi: eliminate shader code for disabled or masked color outputs

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Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7721>
This commit is contained in:
Marek Olšák 2020-10-10 07:19:03 -04:00
parent 509142876b
commit bbad432e96
1 changed files with 8 additions and 0 deletions
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8
src/gallium/drivers/radeonsi/si_state_shaders.c
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@ -1994,6 +1994,14 @@ static inline void si_shader_selector_key(struct pipe_context *ctx, struct si_sh
key->part.ps.epilog.color_is_int10 &= sel->info.colors_written;
}
/* Eliminate shader code computing output values that are unused.
* This enables dead code elimination between shader parts.
* Check if any output is eliminated.
*/
if (sel->colors_written_4bit &
~(sctx->framebuffer.colorbuf_enabled_4bit & blend->cb_target_enabled_4bit))
key->opt.prefer_mono = 1;
bool is_poly = !util_prim_is_points_or_lines(sctx->current_rast_prim);
bool is_line = util_prim_is_lines(sctx->current_rast_prim);