1 files changed, 70 insertions, 0 deletions
diff --git a/test/CodeGenCXX/mangle-win-ccs.cpp b/test/CodeGenCXX/mangle-win-ccs.cpp
new file mode 100644
index 0000000000..f5ddf974cf
--- /dev/null
+++ b/test/CodeGenCXX/mangle-win-ccs.cpp
@@ -0,0 +1,70 @@
+// RUN: %clang_cc1 %s -emit-llvm -triple i686-windows-gnu -o - | FileCheck %s
+// RUN: %clang_cc1 %s -emit-llvm -triple i686-windows-itanium -o - | FileCheck %s
+
+// GCC 5.1 began mangling these Windows calling conventions into function
+// types, since they can be used for overloading. They've always been mangled
+// in the MS ABI, but they are new to the Itanium mangler. Note that the main
+// function definition does not use a calling convention. Only function types
+// that appear later use it.
+
+template <typename Fn> static int func_as_ptr(Fn fn) { return int(fn); }
+
+void f_cdecl(int, int);
+void __attribute__((stdcall)) f_stdcall(int, int);
+void __attribute__((fastcall)) f_fastcall(int, int);
+void __attribute__((thiscall)) f_thiscall(int, int);
+
+int as_cdecl() { return func_as_ptr(f_cdecl); }
+int as_stdcall() { return func_as_ptr(f_stdcall); }
+int as_fastcall() { return func_as_ptr(f_fastcall); }
+
+// CHECK: define dso_local i32 @_Z8as_cdeclv()
+// CHECK:   call i32 @_ZL11func_as_ptrIPFviiEEiT_(void (i32, i32)* @_Z7f_cdeclii)
+
+// CHECK: define dso_local i32 @_Z10as_stdcallv()
+// CHECK:   call i32 @_ZL11func_as_ptrIPU7stdcallFviiEEiT_(void (i32, i32)* @"\01__Z9f_stdcallii@8")
+
+// CHECK: define dso_local i32 @_Z11as_fastcallv()
+// CHECK:   call i32 @_ZL11func_as_ptrIPU8fastcallFviiEEiT_(void (i32, i32)* @"\01@_Z10f_fastcallii@8")
+
+// PR40107: We should mangle thiscall here but we don't because we can't
+// disambiguate it from the member pointer case below where it shouldn't be
+// mangled.
+//int as_thiscall() { return func_as_ptr(f_thiscall); }
+// CHECKX: define dso_local i32 @_Z11as_thiscallv()
+// CHECKX:   call i32 @_ZL11func_as_ptrIPU8thiscallFviiEEiT_(void (i32, i32)* @_Z10f_thiscallii)
+
+// CHECK: define dso_local void @_Z11funcRefTypeRU8fastcallFviiE(void (i32, i32)* %fr)
+void funcRefType(void(__attribute__((fastcall)) & fr)(int, int)) {
+  fr(1, 2);
+}
+
+struct Foo { void bar(int, int); };
+
+// PR40107: In this case, the member function pointer uses the thiscall
+// convention, but GCC doesn't mangle it, so we don't either.
+// CHECK: define dso_local void @_Z15memptr_thiscallP3FooMS_FvvE(%struct.Foo* {{.*}})
+void memptr_thiscall(Foo *o, void (Foo::*mp)()) { (o->*mp)(); }
+
+// CHECK: define dso_local void @_Z12memptrCCTypeR3FooMS_U8fastcallFviiE(%struct.Foo* {{.*}}, { i32, i32 }* byval{{.*}})
+void memptrCCType(Foo &o, void (__attribute__((fastcall)) Foo::*mp)(int, int)) {
+  (o.*mp)(1, 2);
+}
+
+// CHECK: define dso_local i32 @_Z17useTemplateFnTypev()
+// CHECK:   call i32 @_ZL14templateFnTypeIU8fastcallFviiEElPT_(void (i32, i32)* @"\01@_Z10f_fastcallii@8")
+template <typename Fn> static long templateFnType(Fn *fn) { return long(fn); }
+long useTemplateFnType() { return templateFnType(f_fastcall); }
+
+// CHECK: define weak_odr dso_local x86_fastcallcc void @"\01@_Z10fnTemplateIsEvv@0"()
+// CHECK: define          dso_local x86_fastcallcc void @"\01@_Z10fnTemplateIiEvv@0"()
+template <typename T> void __attribute__((fastcall)) fnTemplate() {}
+template void __attribute__((fastcall)) fnTemplate<short>();
+template <> void __attribute__((fastcall)) fnTemplate<int>() {}
+
+// CHECK: define weak_odr dso_local x86_fastcallcc void (i32, i32)* @"\01@_Z12fnTempReturnIsEPU8fastcallFviiEv@0"()
+// CHECK: define          dso_local x86_fastcallcc void (i32, i32)* @"\01@_Z12fnTempReturnIiEPU8fastcallFviiEv@0"()
+typedef void (__attribute__((fastcall)) *fp_cc_t)(int, int);
+template <typename T> fp_cc_t __attribute__((fastcall)) fnTempReturn() { return nullptr; }
+template fp_cc_t __attribute__((fastcall)) fnTempReturn<short>();
+template <> fp_cc_t __attribute__((fastcall)) fnTempReturn<int>() { return nullptr; }