ac/nir: fix tess factor optimization when workgroup barriers are reduced

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Fixes: b49eab68a8 ("ac/nir: use s_sendmsg(HS_TESSFACTOR) to optimize writing tess factors for gfx11")
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/12632
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33645>

src/amd/common/nir/ac_nir_lower_tess_io_to_mem.c

@@ -832,9 +832,10 @@ hs_msg_group_vote_use_memory(nir_builder *b, lower_tess_io_state *st,
    nir_pop_if(&top_b, thread0);
 
    /* Insert a barrier to wait for initialization above if there hasn't been any other barrier
-    * in the shader.
+    * in the shader. If tcs_out_patch_fits_subgroup=true, then TCS barriers don't have a scope
+    * larger than a subgroup.
     */
-   if (!st->tcs_info.always_executes_barrier) {
+   if (!st->tcs_info.always_executes_barrier || st->tcs_out_patch_fits_subgroup) {
       nir_barrier(b, .execution_scope = SCOPE_WORKGROUP, .memory_scope = SCOPE_WORKGROUP,
                   .memory_semantics = NIR_MEMORY_ACQ_REL, .memory_modes = nir_var_mem_shared);
    }