diff --git a/test/CodeGen/complex.c b/test/CodeGen/complex.c
index ca60610..055383e 100644
--- a/test/CodeGen/complex.c
+++ b/test/CodeGen/complex.c
@@ -89,3 +89,7 @@
   --ci1;
 }
 
+// <rdar://problem/7958272>
+double t7(double _Complex c) {
+  return __builtin_fabs(__real__(c));
+}