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

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165015 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 20 insertions, 0 deletions

diff --git a/test/Sema/stdcall-fastcall-x64.c b/test/Sema/stdcall-fastcall-x64.c
new file mode 100644
index 0000000000..ca1995e401
--- /dev/null
+++ b/test/Sema/stdcall-fastcall-x64.c
@@ -0,0 +1,20 @@
+// RUN: %clang_cc1 -fsyntax-only -verify -triple x86_64-pc-linux-gnu %s

+

+// CC qualifier can be applied only to functions

+int __attribute__((stdcall)) var1; // expected-warning{{'stdcall' only applies to function types; type here is 'int'}}

+int __attribute__((fastcall)) var2; // expected-warning{{'fastcall' only applies to function types; type here is 'int'}}

+

+// Different CC qualifiers are not compatible

+void __attribute__((stdcall, fastcall)) foo3(void); // expected-warning{{calling convention 'stdcall' ignored for this target}} expected-warning {{calling convention 'fastcall' ignored for this target}}

+void __attribute__((stdcall)) foo4(); // expected-warning{{calling convention 'stdcall' ignored for this target}}

+void __attribute__((fastcall)) foo4(void); // expected-warning {{calling convention 'fastcall' ignored for this target}}

+

+// rdar://8876096

+void rdar8876096foo1(int i, int j) __attribute__((fastcall, cdecl)); // expected-warning{{calling convention 'fastcall' ignored for this target}}

+void rdar8876096foo2(int i, int j) __attribute__((fastcall, stdcall)); // expected-warning{{calling convention 'stdcall' ignored for this target}} expected-warning {{calling convention 'fastcall' ignored for this target}}

+void rdar8876096foo3(int i, int j) __attribute__((fastcall, regparm(2))); // expected-warning {{calling convention 'fastcall' ignored for this target}}

+void rdar8876096foo4(int i, int j) __attribute__((stdcall, cdecl)); // expected-warning{{calling convention 'stdcall' ignored for this target}}

+void rdar8876096foo5(int i, int j) __attribute__((stdcall, fastcall)); // expected-warning{{calling convention 'stdcall' ignored for this target}} expected-warning {{calling convention 'fastcall' ignored for this target}}

+void rdar8876096foo6(int i, int j) __attribute__((cdecl, fastcall)); // expected-warning {{calling convention 'fastcall' ignored for this target}}

+void rdar8876096foo7(int i, int j) __attribute__((cdecl, stdcall)); // expected-warning{{calling convention 'stdcall' ignored for this target}}

+void rdar8876096foo8(int i, int j) __attribute__((regparm(2), fastcall)); // expected-warning {{calling convention 'fastcall' ignored for this target}}