diff --git a/test/Analysis/array-struct.c b/test/Analysis/array-struct.c
index 86858d7..60a3d31 100644
--- a/test/Analysis/array-struct.c
+++ b/test/Analysis/array-struct.c
@@ -104,3 +104,18 @@
   unsigned i = 0;
   list[i] = 1;
 }
+
+struct s1 {
+  struct s2 {
+    int d;
+  } e;
+};
+
+// The binding of a.e.d should not be removed. Test recursive subregion map
+// building: a->e, e->d. Only then 'a' could be added to live region roots.
+void f13(double timeout) {
+  struct s1 a;
+  a.e.d = (long) timeout;
+  if (a.e.d == 10)
+    a.e.d = 4;
+}