--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/Sema/callingconv.c	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,72 @@
+// RUN: %clang_cc1 %s -fsyntax-only -triple i386-unknown-unknown -verify
+// RUN: %clang_cc1 %s -fsyntax-only -triple i386-unknown-unknown -fms-compatibility -DWIN -verify
+
+void __attribute__((fastcall)) foo(float *a) {
+}
+
+void __attribute__((stdcall)) bar(float *a) {
+}
+
+void __attribute__((fastcall(1))) baz(float *a) { // expected-error {{'fastcall' attribute takes no arguments}}
+}
+
+void __attribute__((fastcall)) test0() {
+}
+
+void __attribute__((fastcall)) test1(void) {
+}
+
+void __attribute__((fastcall)) test2(int a, ...) { // expected-warning {{fastcall calling convention is not supported on variadic function}}
+}
+void __attribute__((stdcall)) test3(int a, ...) { // expected-warning {{stdcall calling convention is not supported on variadic function}}
+}
+void __attribute__((thiscall)) test4(int a, ...) { // expected-error {{variadic function cannot use thiscall calling convention}}
+}
+
+void __attribute__((cdecl)) ctest0() {}
+
+void __attribute__((cdecl(1))) ctest1(float x) {} // expected-error {{'cdecl' attribute takes no arguments}}
+
+void (__attribute__((fastcall)) *pfoo)(float*) = foo;
+
+void (__attribute__((stdcall)) *pbar)(float*) = bar;
+
+void (__attribute__((cdecl)) *ptest1)(void) = test1; // expected-warning {{incompatible pointer types}}
+
+void (*pctest0)() = ctest0;
+
+void ctest2() {}
+void (__attribute__((cdecl)) *pctest2)() = ctest2;
+
+typedef void (__attribute__((fastcall)) *Handler) (float *);
+Handler H = foo;
+
+int __attribute__((pcs("aapcs", "aapcs"))) pcs1(void); // expected-error {{'pcs' attribute takes one argument}}
+int __attribute__((pcs())) pcs2(void); // expected-error {{'pcs' attribute takes one argument}}
+int __attribute__((pcs(pcs1))) pcs3(void); // expected-error {{'pcs' attribute requires a string}} \
+                                           // expected-error {{invalid PCS type}}
+int __attribute__((pcs(0))) pcs4(void); // expected-error {{'pcs' attribute requires a string}}
+/* These are ignored because the target is i386 and not ARM */
+int __attribute__((pcs("aapcs"))) pcs5(void); // expected-warning {{'pcs' calling convention is not supported for this target}}
+int __attribute__((pcs("aapcs-vfp"))) pcs6(void); // expected-warning {{'pcs' calling convention is not supported for this target}}
+int __attribute__((pcs("foo"))) pcs7(void); // expected-error {{invalid PCS type}}
+
+int __attribute__((aarch64_vector_pcs)) aavpcs(void); // expected-warning {{'aarch64_vector_pcs' calling convention is not supported for this target}}
+
+// PR6361
+void ctest3();
+void __attribute__((cdecl)) ctest3() {}
+
+// PR6408
+typedef __attribute__((stdcall)) void (*PROC)();
+PROC __attribute__((cdecl)) ctest4(const char *x) {}
+
+void __attribute__((intel_ocl_bicc)) inteloclbifunc(float *a) {}
+
+typedef void typedef_fun_t(int);
+typedef_fun_t typedef_fun; // expected-note {{previous declaration is here}}
+void __attribute__((stdcall)) typedef_fun(int x) { } // expected-error {{function declared 'stdcall' here was previously declared without calling convention}}
+
+struct type_test {} __attribute__((stdcall));  // expected-warning {{'stdcall' attribute only applies to functions and methods}}
+
+void __vectorcall __builtin_unreachable(); // expected-warning {{vectorcall calling convention is not supported on builtin function}}