Check in LLVM r95781.
diff --git a/test/CodeGenObjC/message-arrays.m b/test/CodeGenObjC/message-arrays.m
new file mode 100644
index 0000000..3e8697f
--- /dev/null
+++ b/test/CodeGenObjC/message-arrays.m
@@ -0,0 +1,15 @@
+// RUN: %clang_cc1 -emit-llvm -o %t %s
+
+void f0(id a) {
+  // This should have an implicit cast
+  [ a print: "hello" ];
+}
+
+@interface A
+-(void) m: (int) arg0, ...;
+@end
+
+int f1(A *a) {
+  // This should also get an implicit cast (for the vararg)
+  [a m: 1, "test"];
+}