diff --git a/test/CFrontend/extern-weak.c b/test/CFrontend/extern-weak.c
new file mode 100644
index 00000000000..26d89590a67
--- /dev/null
+++ b/test/CFrontend/extern-weak.c
@@ -0,0 +1,13 @@
+// RUN: %llvmgcc -O3 -S -o - -emit-llvm %s | grep extern_weak
+
+// TODO: Enable this when darwin gets weak support:
+// : %llvmgcc -O3 -S -o - -emit-llvm | llvm-as | llc
+
+#ifdef __APPLE_CC__
+void foo() __attribute__((weak_import));
+#else
+void foo() __attribute__((weak));
+#endif
+
+void bar() { foo(); }
+