radeonsi: don't write undefined output channels to LDS in LS
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
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
@@ -3176,6 +3176,9 @@
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], ""));
}