Check in LLVM r95781.
diff --git a/test/SemaCXX/warn-char-subscripts.cpp b/test/SemaCXX/warn-char-subscripts.cpp
new file mode 100644
index 0000000..84ea536
--- /dev/null
+++ b/test/SemaCXX/warn-char-subscripts.cpp
@@ -0,0 +1,21 @@
+// RUN: %clang_cc1 -Wchar-subscripts -fsyntax-only -verify %s
+
+template<typename T>
+void t1() {
+ int array[1] = { 0 };
+ T subscript = 0;
+ int val = array[subscript]; // expected-warning{{array subscript is of type 'char'}}
+}
+
+template<typename T>
+void t2() {
+ int array[1] = { 0 };
+ T subscript = 0;
+ int val = subscript[array]; // expected-warning{{array subscript is of type 'char'}}
+}
+
+void test() {
+ t1<char>(); // expected-note {{in instantiation of function template specialization 't1<char>' requested here}}
+ t2<char>(); // expected-note {{in instantiation of function template specialization 't2<char>' requested here}}
+}
+