objective-c: Implement gcc's -Wdirect-ivar-access option.

// rdar://6505197

llvm-svn: 161362

1 files changed, 33 insertions, 0 deletions

diff --git a/clang/test/SemaObjC/warn-direct-ivar-access.m b/clang/test/SemaObjC/warn-direct-ivar-access.m
new file mode 100644
index 00000000000..6850db64a3c
--- /dev/null
+++ b/clang/test/SemaObjC/warn-direct-ivar-access.m
@@ -0,0 +1,33 @@
+// RUN: %clang_cc1  -fsyntax-only -Wdirect-ivar-access -verify -Wno-objc-root-class %s
+// rdar://6505197
+
+__attribute__((objc_root_class)) @interface MyObject {
+@public
+    id _myMaster;
+    id _isTickledPink;
+}
+@property(retain) id myMaster;
+@property(assign) id isTickledPink;
+@end
+
+@implementation MyObject
+
+@synthesize myMaster = _myMaster;
+@synthesize isTickledPink = _isTickledPink;
+
+- (void) doSomething {
+    _myMaster = _isTickledPink; // expected-warning {{instance variable '_myMaster' is being directly accessed}} \
+    // expected-warning {{instance variable '_isTickledPink' is being directly accessed}}
+}
+
+@end
+
+MyObject * foo ()
+{
+	MyObject* p=0;
+        p.isTickledPink = p.myMaster;	// ok
+	p->_isTickledPink = (*p)._myMaster; // expected-warning {{instance variable '_isTickledPink' is being directly accessed}} \
+        // expected-warning {{instance variable '_myMaster' is being directly accessed}}
+	return p->_isTickledPink; // expected-warning {{instance variable '_isTickledPink' is being directly accessed}}
+}
+