--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/Sema/fp16-sema.c	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,30 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+// Functions cannot have parameters of type __fp16.
+extern void f (__fp16); // expected-error {{parameters cannot have __fp16 type; did you forget * ?}}
+extern void g (__fp16 *);
+
+extern void (*pf) (__fp16);  // expected-error {{parameters cannot have __fp16 type; did you forget * ?}}
+extern void (*pg) (__fp16*);
+
+typedef void(*tf) (__fp16);  // expected-error {{parameters cannot have __fp16 type; did you forget * ?}}
+typedef void(*tg) (__fp16*);
+
+void kf(a)
+ __fp16 a; {  // expected-error {{parameters cannot have __fp16 type; did you forget * ?}}
+}
+
+void kg(a)
+ __fp16 *a; {
+}
+
+// Functions cannot return type __fp16.
+extern __fp16 f1 (void); // expected-error {{function return value cannot have __fp16 type; did you forget * ?}}
+extern __fp16 *g1 (void);
+
+extern __fp16 (*pf1) (void); // expected-error {{function return value cannot have __fp16 type; did you forget * ?}}
+extern __fp16 *(*gf1) (void);
+
+typedef __fp16 (*tf1) (void); // expected-error {{function return value cannot have __fp16 type; did you forget * ?}}
+typedef __fp16 *(*tg1) (void);
+