[Mesa-dev] [PATCH 19/23] radeonsi: only write values belonging to the stream when emitting GS vertex

[Nicolai Hähnle]

From: Nicolai Hähnle <nicolai.haeh...@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 0eeff19..b861831 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -5177,20 +5177,23 @@ 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

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