Add the clang library to the repo (with some of my changes, too).

1 files changed, 19 insertions, 0 deletions

diff --git a/clang/test/SemaObjC/weak-receiver-warn.m b/clang/test/SemaObjC/weak-receiver-warn.m
new file mode 100644
index 0000000..f3955da
--- /dev/null
+++ b/clang/test/SemaObjC/weak-receiver-warn.m
@@ -0,0 +1,19 @@
+// RUN: %clang_cc1 -fsyntax-only -fobjc-runtime-has-weak -fobjc-arc -fblocks -Wreceiver-is-weak -verify %s
+// rdar://10225276
+
+@interface Test0
+- (void) setBlock: (void(^)(void)) block;
+- (void) addBlock: (void(^)(void)) block;
+- (void) actNow;
+@end
+
+void test0(Test0 *x) {
+  __weak Test0 *weakx = x;
+  [x addBlock: ^{ [weakx actNow]; }]; // expected-warning {{weak receiver may be unpredictably null in ARC mode}}
+  [x setBlock: ^{ [weakx actNow]; }]; // expected-warning {{weak receiver may be unpredictably null in ARC mode}}
+  x.block = ^{ [weakx actNow]; }; // expected-warning {{weak receiver may be unpredictably null in ARC mode}}
+
+  [weakx addBlock: ^{ [x actNow]; }]; // expected-warning {{weak receiver may be unpredictably null in ARC mode}}
+  [weakx setBlock: ^{ [x actNow]; }]; // expected-warning {{weak receiver may be unpredictably null in ARC mode}}
+  weakx.block = ^{ [x actNow]; };
+}