1 files changed, 17 insertions, 0 deletions
diff --git a/test/CodeGenObjC/undefined-protocol2.m b/test/CodeGenObjC/undefined-protocol2.m
new file mode 100644
index 0000000..f171523
--- /dev/null
+++ b/test/CodeGenObjC/undefined-protocol2.m
@@ -0,0 +1,17 @@
+// RUN: %clang_cc1 -triple x86_64-apple-macosx -emit-llvm %s -o - | FileCheck %s
+
+// Test that we produce a declaration for the protocol. It must be matched
+// by a definition in another TU, so external is the correct linkage
+// (not extern_weak).
+// CHECK: @"\01l_OBJC_PROTOCOL_$_p1" = external global
+
+@interface NSObject
+@end
+
+@protocol p1;
+
+@interface I1 : NSObject <p1>
+@end
+
+@implementation I1
+@end