Add support for -Wchar-subscripts. Fixes PR4801.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@81747 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 31 insertions, 0 deletions

diff --git a/test/Sema/warn-char-subscripts.c b/test/Sema/warn-char-subscripts.c
new file mode 100644
index 0000000000..65a34e8fc2
--- /dev/null
+++ b/test/Sema/warn-char-subscripts.c
@@ -0,0 +1,31 @@
+// RUN: clang-cc -Wchar-subscripts -fsyntax-only -verify %s
+
+void t1() {
+  int array[1] = { 0 };
+  char subscript = 0;
+  int val = array[subscript]; // expected-warning{{array subscript is of type 'char'}}
+}
+
+void t2() {
+  int array[1] = { 0 };
+  char subscript = 0;
+  int val = subscript[array]; // expected-warning{{array subscript is of type 'char'}}
+}
+
+void t3() {
+  int *array = 0;
+  char subscript = 0;
+  int val = array[subscript]; // expected-warning{{array subscript is of type 'char'}}
+}
+
+void t4() {
+  int *array = 0;
+  char subscript = 0;
+  int val = subscript[array]; // expected-warning{{array subscript is of type 'char'}}
+}
+
+char returnsChar();
+void t5() {
+  int *array = 0;
+  int val = array[returnsChar()]; // expected-warning{{array subscript is of type 'char'}}
+}