--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gcc.dg/cpp/tr-warn2.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,18 @@
+/* K+R rejects use of function-like macros in non-function context.
+   ANSI C explicitly permits this (the macro is not expanded).
+
+   We should not warn about this during pre-expansion of arguments,
+   since traditional preprocessors don't do pre-expansion, and we get
+   the warning anyway during the re-scan pass if and only if it is
+   appropriate.  */
+
+/* { dg-do preprocess } */
+/* { dg-options -Wtraditional } */
+
+#define f(x) x
+#define g(x) x / 2
+#define h(a, b) a(b)
+f(g) (3)	    /* { dg-bogus "must be used with arguments" } */
+f 2		    /* { dg-warning "must be used with arguments" } */
+f(g) 3		    /* { dg-warning "must be used with arguments" } */
+h(f, 3)		    /* { dg-bogus "must be used with arguments" } */