radv: gather the number of output components per stream

This will be also used for splitting the GS->VS ring buffer.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Dave Airlie <airlied@redhat.com>

src/amd/vulkan/radv_shader.h

@@ -159,6 +159,7 @@ struct radv_shader_info {
 	} vs;
 	struct {
 		uint8_t output_usage_mask[VARYING_SLOT_VAR31 + 1];
+		uint8_t num_stream_output_components[4];
 		uint8_t max_stream;
 	} gs;
 	struct {

src/amd/vulkan/radv_shader_info.c

@@ -438,11 +438,13 @@ static void
 gather_info_output_decl_gs(const nir_shader *nir, const nir_variable *var,
 			   struct radv_shader_info *info)
 {
+	unsigned num_components = glsl_get_component_slots(var->type);
 	unsigned stream = var->data.stream;
 
 	assert(stream < 4);
 
 	info->gs.max_stream = MAX2(info->gs.max_stream, stream);
+	info->gs.num_stream_output_components[stream] += num_components;
 }
 
 static void