Add a branch to ensure the test is compiled.

The compiler will now not compile large methods with no branch.

Change-Id: Iaea284c648f7f3f754cb8ec721ad2ecffbd2f6af
diff --git a/test/421-large-frame/src/Main.java b/test/421-large-frame/src/Main.java
index 01b89ba..dae72fb 100644
--- a/test/421-large-frame/src/Main.java
+++ b/test/421-large-frame/src/Main.java
@@ -2029,6 +2029,11 @@
     l997 += l996;
     l998 += l997;
     l999 += l998;
-    return l999;
+    // Create a branch to beat the large method check.
+    if (l998 == l999) {
+      return l998;
+    } else {
+      return l999;
+    }
   }
 }