1 files changed, 13 insertions, 0 deletions
diff --git a/clang/test/Sema/attr-format_arg.c b/clang/test/Sema/attr-format_arg.c
new file mode 100644
index 0000000..64a2387
--- /dev/null
+++ b/clang/test/Sema/attr-format_arg.c
@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+int printf(const char *, ...);
+
+const char* f(const char *s) __attribute__((format_arg(1)));
+
+void g(const char *s) {
+  printf("%d", 123);
+  printf("%d %d", 123); // expected-warning{{more '%' conversions than data arguments}}
+
+  printf(f("%d"), 123);
+  printf(f("%d %d"), 123); // expected-warning{{more '%' conversions than data arguments}}
+}