intel/vec4: Handle scoped barriers with execution scope

Reviewed-by: Alyssa Rosenzweig <alyssa@collabora.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/21634>

src/intel/compiler/brw_vec4_nir.cpp

@@ -718,7 +718,8 @@ vec4_visitor::nir_emit_intrinsic(nir_intrinsic_instr *instr)
       unreachable("expecting only nir_intrinsic_scoped_barrier");
 
    case nir_intrinsic_scoped_barrier: {
-      assert(nir_intrinsic_execution_scope(instr) == NIR_SCOPE_NONE);
+      if (nir_intrinsic_memory_scope(instr) == NIR_SCOPE_NONE)
+         break;
       const vec4_builder bld =
          vec4_builder(this).at_end().annotate(current_annotation, base_ir);
       const dst_reg tmp = bld.vgrf(BRW_REGISTER_TYPE_UD);