From: Marek Olšák <[email protected]>

---
 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 bca0ca9..16036e3 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -3169,20 +3169,23 @@ static void si_llvm_emit_ls_epilogue(struct 
lp_build_tgsi_context *bld_base)
                 */
                if (name == TGSI_SEMANTIC_LAYER ||
                    name == TGSI_SEMANTIC_VIEWPORT_INDEX)
                        continue;
 
                int param = si_shader_io_get_unique_index(name, index);
                LLVMValueRef dw_addr = LLVMBuildAdd(ctx->ac.builder, 
base_dw_addr,
                                        LLVMConstInt(ctx->i32, param * 4, 0), 
"");
 
                for (chan = 0; chan < 4; chan++) {
+                       if (!(info->output_usagemask[i] & (1 << chan)))
+                               continue;
+
                        lds_store(bld_base, chan, dw_addr,
                                  LLVMBuildLoad(ctx->ac.builder, out_ptr[chan], 
""));
                }
        }
 
        if (ctx->screen->b.chip_class >= GFX9)
                si_set_ls_return_value_for_tcs(ctx);
 }
 
 static void si_llvm_emit_es_epilogue(struct lp_build_tgsi_context *bld_base)
-- 
2.7.4

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