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radv: set the LayerId output usage mask if FS needs it 

When the stage preceding FS doesn't export it the fragment shader
might read it, even if it's 0.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
This commit is contained in:
Samuel Pitoiset 2019-07-10 13:03:49 +02:00
parent 53d64753e1
commit bd86ded027
1 changed files with 17 additions and 0 deletions
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17
src/amd/vulkan/radv_shader_info.c
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@ -576,4 +576,21 @@ radv_nir_shader_info_pass(const struct nir_shader *nir,
nir->info.stage == MESA_SHADER_TESS_EVAL ||
nir->info.stage == MESA_SHADER_GEOMETRY)
gather_xfb_info(nir, info);
/* Make sure to export the LayerID if the fragment shader needs it. */
if (options->key.vs_common_out.export_layer_id) {
switch (nir->info.stage) {
case MESA_SHADER_VERTEX:
info->vs.output_usage_mask[VARYING_SLOT_LAYER] |= 0x1;
break;
case MESA_SHADER_TESS_EVAL:
info->tes.output_usage_mask[VARYING_SLOT_LAYER] |= 0x1;
break;
case MESA_SHADER_GEOMETRY:
info->gs.output_usage_mask[VARYING_SLOT_LAYER] |= 0x1;
break;
default:
break;
}
}
}