[sanitize] More hb_barrier() annotations
diff --git a/src/hb-aat-layout-opbd-table.hh b/src/hb-aat-layout-opbd-table.hh
index 51b650f..9840d3a 100644
--- a/src/hb-aat-layout-opbd-table.hh
+++ b/src/hb-aat-layout-opbd-table.hh
@@ -144,6 +144,7 @@
     TRACE_SANITIZE (this);
     if (unlikely (!c->check_struct (this) || version.major != 1))
       return_trace (false);
+    hb_barrier ();
 
     switch (format)
     {