nir/deref: copy ptr_stride when rematerializing

Signed-off-by: Karol Herbst <kherbst@redhat.com>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4068>

src/compiler/nir/nir_deref.c

@@ -657,10 +657,13 @@ rematerialize_deref_in_block(nir_deref_instr *deref,
    switch (deref->deref_type) {
    case nir_deref_type_var:
    case nir_deref_type_array_wildcard:
-   case nir_deref_type_cast:
       /* Nothing more to do */
       break;
 
+   case nir_deref_type_cast:
+      new_deref->cast.ptr_stride = deref->cast.ptr_stride;
+      break;
+
    case nir_deref_type_array:
    case nir_deref_type_ptr_as_array:
       assert(!nir_src_as_deref(deref->arr.index));