--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/PCH/selector-warning.h	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,24 @@
+typedef struct objc_selector    *SEL;
+
+@interface Foo 
+- (void) NotOK;
+@end
+
+@implementation Foo
+- (void) foo
+{
+  SEL a = @selector(b1ar); 
+  a = @selector(b1ar); 
+  a = @selector(bar);
+  a = @selector(ok);	// expected-warning {{unimplemented selector 'ok'}}
+  a = @selector(ok);
+  a = @selector(NotOK);	// expected-warning {{unimplemented selector 'NotOK'}}
+  a = @selector(NotOK);
+
+  a = @selector(clNotOk);	// expected-warning {{unimplemented selector 'clNotOk'}}
+
+  a = @selector (cl1);
+  a = @selector (cl2);
+  a = @selector (instNotOk);	// expected-warning {{unimplemented selector 'instNotOk'}}
+}
+@end