1 files changed, 114 insertions, 0 deletions
diff --git a/test/SemaObjC/externally-retained.m b/test/SemaObjC/externally-retained.m
new file mode 100644
index 0000000000..2708fc8eef
--- /dev/null
+++ b/test/SemaObjC/externally-retained.m
@@ -0,0 +1,114 @@
+// RUN: %clang_cc1 -triple x86_64-apple-macosx10.13.0 -fobjc-runtime=macosx-10.13.0 -fblocks -fobjc-arc %s -verify
+// RUN: %clang_cc1 -triple x86_64-apple-macosx10.13.0 -fobjc-runtime=macosx-10.13.0 -fblocks -fobjc-arc -xobjective-c++ %s -verify
+
+#define EXT_RET __attribute__((objc_externally_retained))
+
+@interface ObjCTy
+@end
+
+void test1() {
+  EXT_RET int a; // expected-warning{{'objc_externally_retained' can only be applied to}}
+  EXT_RET __weak ObjCTy *b; // expected-warning{{'objc_externally_retained' can only be applied to}}
+  EXT_RET __weak int (^c)(); // expected-warning{{'objc_externally_retained' can only be applied to}}
+
+  EXT_RET int (^d)() = ^{return 0;};
+  EXT_RET ObjCTy *e = 0;
+  EXT_RET __strong ObjCTy *f = 0;
+
+  e = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
+  f = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
+  d = ^{ return 0; }; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
+}
+
+void test2(ObjCTy *a);
+
+void test2(ObjCTy *a) EXT_RET {
+  a = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
+}
+
+EXT_RET ObjCTy *test3; // expected-warning{{'objc_externally_retained' can only be applied to}}
+
+@interface X // expected-warning{{defined without specifying a base class}} expected-note{{add a super class}}
+-(void)m: (ObjCTy *) p;
+@end
+@implementation X
+-(void)m: (ObjCTy *) p EXT_RET {
+  p = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
+}
+@end
+
+void test4() {
+  __attribute__((objc_externally_retained(0))) ObjCTy *a; // expected-error{{'objc_externally_retained' attribute takes no arguments}}
+}
+
+void test5(ObjCTy *first, __strong ObjCTy *second) EXT_RET {
+  first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
+  second = 0; // fine
+}
+
+void test6(ObjCTy *first,
+           __strong ObjCTy *second) EXT_RET {
+  first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
+  second = 0;
+}
+
+__attribute__((objc_root_class)) @interface Y @end
+
+@implementation Y
+- (void)test7:(__strong ObjCTy *)first
+    withThird:(ObjCTy *)second EXT_RET {
+  first = 0;
+  second = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
+}
+@end
+
+void (^blk)(ObjCTy *, ObjCTy *) =
+    ^(__strong ObjCTy *first, ObjCTy *second) EXT_RET {
+  first = 0;
+  second = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
+};
+
+void test8(EXT_RET ObjCTy *x) {} // expected-warning{{'objc_externally_retained' attribute only applies to variables}}
+
+#pragma clang attribute ext_ret.push(__attribute__((objc_externally_retained)), apply_to=any(function, block, objc_method))
+void test9(ObjCTy *first, __strong ObjCTy *second) {
+  first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
+  second = 0;
+}
+void (^test10)(ObjCTy *first, ObjCTy *second) = ^(ObjCTy *first, __strong ObjCTy *second) {
+  first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
+  second = 0;
+};
+__attribute__((objc_root_class)) @interface Test11 @end
+@implementation Test11
+-(void)meth: (ObjCTy *)first withSecond:(__strong ObjCTy *)second {
+  first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
+  second = 0;
+}
++(void)othermeth: (ObjCTy *)first withSecond:(__strong ObjCTy *)second {
+  first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
+  second = 0;
+}
+@end
+
+#if __cplusplus
+class Test12 {
+  void inline_member(ObjCTy *first, __strong ObjCTy *second) {
+    first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
+    second = 0;
+  }
+  static void static_inline_member(ObjCTy *first, __strong ObjCTy *second) {
+    first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
+    second = 0;
+  }
+};
+#endif
+
+void test13(ObjCTy *first, __weak ObjCTy *second, __unsafe_unretained ObjCTy *third, __strong ObjCTy *fourth) {
+  first = 0; // expected-error{{variable declared with 'objc_externally_retained' cannot be modified in ARC}}
+  second = 0;
+  third = 0;
+  fourth = 0;
+}
+
+#pragma clang attribute ext_ret.pop