-Wuninitialized should not warn about variables captured by blocks as byref.

Note this can potentially be enhanced to detect if the __block variable
is actually written by the block, or only when the block "escapes" or
is actually used, but that requires more analysis than it is probably worth
for this simple check.

llvm-svn: 128681

1 files changed, 9 insertions, 0 deletions

diff --git a/clang/test/Sema/uninit-variables.c b/clang/test/Sema/uninit-variables.c
index 85e6394edac..17bd07f3e55 100644
--- a/clang/test/Sema/uninit-variables.c
+++ b/clang/test/Sema/uninit-variables.c
@@ -328,3 +328,12 @@ void test50()
   char c[1 ? : 2]; // no-warning
 }
 
+int test51(void)
+{
+    __block int a;
+    ^(void) {
+      a = 42;
+    }();
+    return a; // no-warning
+}
+