From: Nicolai Hähnle <nicolai.haeh...@amd.com>
This affects for GS copy shaders. When an output is meant for vertex
stream != 0, then we don't have to make it available to the pixel
shader.
There is a minor inefficiency here because the GLSL varying packing pass
does not group varyings of the same vertex stream together, but it
shouldn't be important in practice.
---
src/gallium/drivers/radeonsi/si_shader.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/gallium/drivers/radeonsi/si_shader.c
b/src/gallium/drivers/radeonsi/si_shader.c
index cd2fd09..b2cf44a 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -2298,20 +2298,26 @@ static void si_llvm_export_vs(struct
lp_build_tgsi_context *bld_base,
(1ull <<
si_shader_io_get_unique_index(semantic_name, semantic_index)))
export_param = false;
break;
default:
if (shader->key.opt.hw_vs.kill_outputs2 &
(1u <<
si_shader_io_get_unique_index2(semantic_name, semantic_index)))
export_param = false;
break;
}
+ if (outputs[i].vertex_stream[0] != 0 &&
+ outputs[i].vertex_stream[1] != 0 &&
+ outputs[i].vertex_stream[2] != 0 &&
+ outputs[i].vertex_stream[3] != 0)
+ export_param = false;
+
handle_semantic:
/* Select the correct target */
switch(semantic_name) {
case TGSI_SEMANTIC_PSIZE:
psize_value = outputs[i].values[0];
continue;
case TGSI_SEMANTIC_EDGEFLAG:
edgeflag_value = outputs[i].values[0];
continue;
case TGSI_SEMANTIC_LAYER:
--
2.7.4
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