--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/test/Sema/attr-swiftcall.c	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,31 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fsyntax-only -verify %s
+// RUN: %clang_cc1 -triple x86_64-unknown-windows -fsyntax-only -verify %s
+
+#define SWIFTCALL __attribute__((swiftcall))
+#define INDIRECT_RESULT __attribute__((swift_indirect_result))
+#define ERROR_RESULT __attribute__((swift_error_result))
+#define CONTEXT __attribute__((swift_context))
+
+int notAFunction SWIFTCALL; // expected-warning {{'swiftcall' only applies to function types; type here is 'int'}}
+void variadic(int x, ...) SWIFTCALL; // expected-error {{variadic function cannot use swiftcall calling convention}}
+void unprototyped() SWIFTCALL; // expected-error {{function with no prototype cannot use the swiftcall calling convention}}
+void multiple_ccs(int x) SWIFTCALL __attribute__((vectorcall)); // expected-error {{vectorcall and swiftcall attributes are not compatible}}
+void (*functionPointer)(void) SWIFTCALL;
+
+void indirect_result_nonswift(INDIRECT_RESULT void *out); // expected-error {{'swift_indirect_result' parameter can only be used with swiftcall calling convention}}
+void indirect_result_bad_position(int first, INDIRECT_RESULT void *out) SWIFTCALL; // expected-error {{'swift_indirect_result' parameters must be first parameters of function}}
+void indirect_result_bad_type(INDIRECT_RESULT int out) SWIFTCALL; // expected-error {{'swift_indirect_result' parameter must have pointer type; type here is 'int'}}
+void indirect_result_single(INDIRECT_RESULT void *out) SWIFTCALL;
+void indirect_result_multiple(INDIRECT_RESULT void *out1, INDIRECT_RESULT void *out2) SWIFTCALL;
+
+void error_result_nonswift(ERROR_RESULT void **error); // expected-error {{'swift_error_result' parameter can only be used with swiftcall calling convention}} expected-error{{'swift_error_result' parameter must follow 'swift_context' parameter}}
+void error_result_bad_position2(int first, ERROR_RESULT void **error) SWIFTCALL; // expected-error {{'swift_error_result' parameter must follow 'swift_context' parameter}}
+void error_result_bad_type(CONTEXT void *context, ERROR_RESULT int error) SWIFTCALL; // expected-error {{'swift_error_result' parameter must have pointer to unqualified pointer type; type here is 'int'}}
+void error_result_bad_type2(CONTEXT void *context, ERROR_RESULT int *error) SWIFTCALL; // expected-error {{'swift_error_result' parameter must have pointer to unqualified pointer type; type here is 'int *'}}
+void error_result_okay(int a, int b, CONTEXT void *context, ERROR_RESULT void **error) SWIFTCALL;
+void error_result_okay2(CONTEXT void *context, ERROR_RESULT void **error, void *selfType, char **selfWitnessTable) SWIFTCALL;
+
+void context_nonswift(CONTEXT void *context); // expected-error {{'swift_context' parameter can only be used with swiftcall calling convention}}
+void context_bad_type(CONTEXT int context) SWIFTCALL; // expected-error {{'swift_context' parameter must have pointer type; type here is 'int'}}
+void context_okay(CONTEXT void *context) SWIFTCALL;
+void context_okay2(CONTEXT void *context, void *selfType, char **selfWitnessTable) SWIFTCALL;