Test to ensure no old-style-cast warning is emitted for objc-arc __bridge casts

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@196204 91177308-0d34-0410-b5e6-96231b3b80d8

test/SemaObjCXX/old-style-cast.mm

+// RUN: %clang_cc1 -triple x86_64-apple-darwin11 -fsyntax-only -fobjc-arc -Wold-style-cast -verify %s
+// expected-no-diagnostics
+
+// We don't currently have a way to write ARC/C++ bridge casts in terms of C++
+// casts, so ensure we don't emit an old-style-cast warning in these cases.
+
+id test(void *opaqueInput) {
+  id someObjCObject = (__bridge id)opaqueInput;
+  void *someCFObject = (__bridge_retained void *)someObjCObject;
+  return (__bridge_transfer id)someCFObject;
+}