diff --git a/test/CFrontend/2007-09-17-WeakRef.c b/test/CFrontend/2007-09-17-WeakRef.c
new file mode 100644
index 00000000000..6c420ea38a7
--- /dev/null
+++ b/test/CFrontend/2007-09-17-WeakRef.c
@@ -0,0 +1,10 @@
+// RUN: %llvmgcc -O1 -S %s -o - | grep icmp
+// PR1678
+
+extern void B (void);
+static __typeof(B) A __attribute__ ((__weakref__("B")));
+int active (void)
+{
+  static void *const p = __extension__ (void *) &A;
+  return p != 0;
+}