[Mesa-dev] [PATCH v2 20/25] radeonsi: only write values belonging to the stream when emitting GS vertex

[Nicolai Hähnle]

From: Nicolai Hähnle <nicolai.haehnle at amd.com>

---
 src/gallium/drivers/radeonsi/si_shader.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index b545c4f..e360c31 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -5190,20 +5190,23 @@ static void si_llvm_emit_vertex(
 				   ctx->voidt, &kill, 1, 0);
 	} else {
 		lp_build_if(&if_state, gallivm, can_emit);
 	}
 
 	for (i = 0; i < info->num_outputs; i++) {
 		LLVMValueRef *out_ptr =
 			ctx->soa.outputs[i];
 
 		for (chan = 0; chan < 4; chan++) {
+			if (((info->output_streams[i] >> (2 * chan)) & 3) != stream)
+				continue;
+
 			LLVMValueRef out_val = LLVMBuildLoad(gallivm->builder, out_ptr[chan], "");
 			LLVMValueRef voffset =
 				lp_build_const_int32(gallivm, (i * 4 + chan) *
 						     shader->selector->gs_max_out_vertices);
 
 			voffset = lp_build_add(uint, voffset, gs_next_vertex);
 			voffset = lp_build_mul_imm(uint, voffset, 4);
 
 			out_val = LLVMBuildBitCast(gallivm->builder, out_val, ctx->i32, "");
 
-- 
2.7.4