Index: test/SemaOpenCL/char-must-be-signed.cl
===================================================================
--- test/SemaOpenCL/char-must-be-signed.cl
+++ test/SemaOpenCL/char-must-be-signed.cl
@@ -0,0 +1,4 @@
+// RUN: %clang_cc1 %s
+
+_Static_assert(sizeof(char) == 1, "In OpenCL char has to be 1 bytes length");
+_Static_assert((char)(0xFFu) < 0, "In OpenCL char type has to be signed.");