add unit tests

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@110278 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/BlocksRuntime/tests/rdar6414583.c b/BlocksRuntime/tests/rdar6414583.c
new file mode 100644
index 0000000..2ada04d
--- /dev/null
+++ b/BlocksRuntime/tests/rdar6414583.c
@@ -0,0 +1,31 @@
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+
+// CONFIG rdar://6414583
+
+// a smaller case of byrefcopyint
+
+#include <Block.h>
+#include <dispatch/dispatch.h>
+#include <stdio.h>
+
+int main(int argc, char *argv[]) {
+    __block int c = 1;
+
+    //printf("&c = %p - c = %i\n", &c, c);
+
+    int i;
+    for(i =0; i < 2; i++) {
+        dispatch_block_t block = Block_copy(^{ c = i; });
+
+        block();
+//        printf("%i: &c = %p - c = %i\n", i, &c, c);
+
+        Block_release(block);
+    }
+    printf("%s: success\n", argv[0]);
+    return 0;
+}