Matching block names with FileCheck requires asserts.

llvm-svn: 165118
diff --git a/clang/test/CodeGen/const-label-addr.c b/clang/test/CodeGen/const-label-addr.c
index e2fe387..e606c3b 100644
--- a/clang/test/CodeGen/const-label-addr.c
+++ b/clang/test/CodeGen/const-label-addr.c
@@ -1,4 +1,5 @@
 // RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s
+// REQUIRES: asserts
 
 // CHECK: @a.a = internal global i8* blockaddress(@a, %A)
 int a() {