clover: Call nir_lower_mem_constant_vars

Fixes: 26a4c8f375e "clover/nir: Use nir_var_mem_constant for..."
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6472>
diff --git a/src/gallium/frontends/clover/nir/invocation.cpp b/src/gallium/frontends/clover/nir/invocation.cpp
index 8ea6d3c..8cdef27 100644
--- a/src/gallium/frontends/clover/nir/invocation.cpp
+++ b/src/gallium/frontends/clover/nir/invocation.cpp
@@ -227,6 +227,8 @@
          offset += glsl_get_cl_size(var->type);
       }
 
+      NIR_PASS_V(nir, nir_lower_mem_constant_vars,
+                 glsl_get_cl_type_size_align);
       NIR_PASS_V(nir, nir_lower_vars_to_explicit_types,
                  nir_var_mem_shared | nir_var_function_temp,
                  glsl_get_cl_type_size_align);