radeonsi/gfx10: simplify a streamout loop in gfx10_emit_ngg_epilogue

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>

diff --git a/src/gallium/drivers/radeonsi/gfx10_shader_ngg.c b/src/gallium/drivers/radeonsi/gfx10_shader_ngg.c
index e074449064a7ad4b36808d3aad4e2c1825aacb72..59f7f34c8a7949b0fc7b74546cd008ee1f8a9e34 100644 (file)
--- a/src/gallium/drivers/radeonsi/gfx10_shader_ngg.c
+++ b/src/gallium/drivers/radeonsi/gfx10_shader_ngg.c
@@ -538,19 +538,18 @@ void gfx10_emit_ngg_epilogue(struct ac_shader_abi *abi,
                outputs[i].semantic_name = info->output_semantic_name[i];
                outputs[i].semantic_index = info->output_semantic_index[i];
 
-               /* This is used only by streamout. */
                for (unsigned j = 0; j < 4; j++) {
-                       outputs[i].values[j] =
-                               LLVMBuildLoad(builder,
-                                             addrs[4 * i + j],
-                                             "");
                        outputs[i].vertex_stream[j] =
                                (info->output_streams[i] >> (2 * j)) & 3;
 
-                       if (vertex_ptr) {
+                       /* TODO: we may store more outputs than streamout needs,
+                        * but streamout performance isn't that important.
+                        */
+                       if (sel->so.num_outputs) {
                                tmp = ac_build_gep0(&ctx->ac, vertex_ptr,
                                        LLVMConstInt(ctx->i32, 4 * i + j, false));
-                               tmp2 = ac_to_integer(&ctx->ac, outputs[i].values[j]);
+                               tmp2 = LLVMBuildLoad(builder, addrs[4 * i + j], "");
+                               tmp2 = ac_to_integer(&ctx->ac, tmp2);
                                LLVMBuildStore(builder, tmp2, tmp);
                        }
                }