-Warc-repeated-use-of-weak: look through explicit casts on assigned values.

Reading from a weak property, casting the result, and assigning to a
strong pointer should still be considered safe.

llvm-svn: 165629

1 files changed, 11 insertions, 0 deletions

diff --git a/clang/test/SemaObjC/arc-repeated-weak.mm b/clang/test/SemaObjC/arc-repeated-weak.mm
index 90ba75f6efd..1c6578ef131 100644
--- a/clang/test/SemaObjC/arc-repeated-weak.mm
+++ b/clang/test/SemaObjC/arc-repeated-weak.mm
@@ -147,6 +147,17 @@ void testBlock(Test *a) {
   });
 }
 
+void assignToStrongWithCasts(Test *a) {
+  if (condition()) {
+    Test *val = (Test *)a.weakProp; // no-warning
+    (void)val;
+  } else {
+    id val;
+    val = (Test *)a.weakProp; // no-warning
+    (void)val;
+  }
+}
+
 
 @interface Test (Methods)
 @end