1 files changed, 32 insertions, 0 deletions
diff --git a/test/SemaObjC/unused.m b/test/SemaObjC/unused.m
index 3fd1cf04673f4..6ea3fe8e00ab3 100644
--- a/test/SemaObjC/unused.m
+++ b/test/SemaObjC/unused.m
@@ -72,3 +72,35 @@ static NSString *x = @"hi"; // expected-warning {{unused variable 'x'}}
 - (void) b {}
 - (void) a { [self b]; }
 @end
+
+// Test that objc_precise_lifetime suppresses
+// unused variable warnings.
+extern void rdar15596883_foo(void);
+void rdar15596883(id x) {
+  __attribute__((objc_precise_lifetime)) id y = x; // no-warning
+  rdar15596883_foo();
+}
+
+@interface PropertyObject : NSObject 
+@property int length;
+@end
+
+@protocol P
+@property int property;
+@end
+
+void test3(PropertyObject *o)
+{
+  [o length]; // expected-warning {{property access result unused - getters should not be used for side effects}}
+  (void)[o length];
+}
+
+void test4(id o)
+{
+  [o length]; // No warning.
+}
+
+void test5(id <P> p)
+{
+    [p property]; // expected-warning {{property access result unused - getters should not be used for side effects}}
+}