Allowing individual targets to determine whether a given calling convention is allowed or ignored with warning. This allows for correct name mangling for x64 targets on Windows, which in turn allows for linking against the Win32 APIs.
Fixes PR13782
llvm-svn: 165015
diff --git a/clang/test/Sema/MicrosoftCompatibility.c b/clang/test/Sema/MicrosoftCompatibility.c
index 6b137a6..be13949 100644
--- a/clang/test/Sema/MicrosoftCompatibility.c
+++ b/clang/test/Sema/MicrosoftCompatibility.c
@@ -18,4 +18,10 @@
__declspec(align(32768)) struct S1 { int a; } s; /* expected-error {{requested alignment must be 8192 bytes or smaller}} */
struct __declspec(aligned) S2 {}; /* expected-warning {{unknown __declspec attribute 'aligned' ignored}} */
-struct __declspec(appdomain) S3 {}; /* expected-warning {{__declspec attribute 'appdomain' is not supported}} */
\ No newline at end of file
+struct __declspec(appdomain) S3 {}; /* expected-warning {{__declspec attribute 'appdomain' is not supported}} */
+
+int __stdcall f(void); /* expected-note {{previous declaration is here}} */
+
+int __cdecl f(void) { /* expected-error {{function declared 'cdecl' here was previously declared 'stdcall'}} */
+ return 0;
+}