ObjC properties: consider ownership of properties from protocols when synthesizing.

When determining whether ownership was explicitly written for a
property when it is being synthesized, also consider that the original
property might have come from a protocol. Fixes rdar://problem/23931441.

llvm-svn: 255943

1 files changed, 16 insertions, 0 deletions

diff --git a/clang/test/SemaObjC/arc-property-decl-attrs.m b/clang/test/SemaObjC/arc-property-decl-attrs.m
index 408b2709203..6c96ba481c4 100644
--- a/clang/test/SemaObjC/arc-property-decl-attrs.m
+++ b/clang/test/SemaObjC/arc-property-decl-attrs.m
@@ -105,3 +105,19 @@
 @property(nonatomic, weak, nonnull, readonly) id ROdelegate; // expected-error {{property attributes 'nonnull' and 'weak' are mutually exclusive}}
 @end
 
+// rdar://problem/23931441
+@protocol P
+@property(readonly, retain) id prop;
+@end
+
+__attribute__((objc_root_class))
+@interface I2<P>
+@end
+
+@interface I2()
+@property (readwrite) id prop;
+@end
+
+@implementation I2
+@synthesize prop;
+@end