objective-c test case for __attribute__((unused)) on method arguments.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@93887 91177308-0d34-0410-b5e6-96231b3b80d8

test/SemaObjC/method-unused-attribute.m

@@ -0,0 +1,15 @@
+// RUN: %clang_cc1  -fsyntax-only -Wunused-parameter -verify %s
+
+@interface INTF
+- (void) correct_use_of_unused: (void *) notice : (id)another_arg;
+- (void) will_warn_unused_arg: (void *) notice : (id)warn_unused;
+- (void) unused_attr_on_decl_ignored: (void *)  __attribute__((unused)) will_warn;
+@end
+
+@implementation INTF
+- (void) correct_use_of_unused: (void *)  __attribute__((unused)) notice : (id) __attribute__((unused)) newarg{
+}
+- (void) will_warn_unused_arg: (void *) __attribute__((unused))  notice : (id)warn_unused {}  // expected-warning {{unused parameter 'warn_unused'}}
+- (void) unused_attr_on_decl_ignored: (void *)  will_warn{}  // expected-warning {{unused parameter 'will_warn'}}
+@end
+