71 lines · cpp
1// RUN: %clang_cc1 %s -emit-llvm -triple i686-windows-gnu -o - | FileCheck %s2// RUN: %clang_cc1 %s -emit-llvm -triple i686-windows-itanium -o - | FileCheck %s3 4// GCC 5.1 began mangling these Windows calling conventions into function5// types, since they can be used for overloading. They've always been mangled6// in the MS ABI, but they are new to the Itanium mangler. Note that the main7// function definition does not use a calling convention. Only function types8// that appear later use it.9 10template <typename Fn> static int func_as_ptr(Fn fn) { return int(fn); }11 12void f_cdecl(int, int);13void __attribute__((stdcall)) f_stdcall(int, int);14void __attribute__((fastcall)) f_fastcall(int, int);15void __attribute__((thiscall)) f_thiscall(int, int);16 17int as_cdecl() { return func_as_ptr(f_cdecl); }18int as_stdcall() { return func_as_ptr(f_stdcall); }19int as_fastcall() { return func_as_ptr(f_fastcall); }20 21// CHECK: define dso_local noundef i32 @_Z8as_cdeclv()22// CHECK: call noundef i32 @_ZL11func_as_ptrIPFviiEEiT_(ptr noundef @_Z7f_cdeclii)23 24// CHECK: define dso_local noundef i32 @_Z10as_stdcallv()25// CHECK: call noundef i32 @_ZL11func_as_ptrIPU7stdcallFviiEEiT_(ptr noundef @"\01__Z9f_stdcallii@8")26 27// CHECK: define dso_local noundef i32 @_Z11as_fastcallv()28// CHECK: call noundef i32 @_ZL11func_as_ptrIPU8fastcallFviiEEiT_(ptr noundef @"\01@_Z10f_fastcallii@8")29 30// PR40107: We should mangle thiscall here but we don't because we can't31// disambiguate it from the member pointer case below where it shouldn't be32// mangled.33//int as_thiscall() { return func_as_ptr(f_thiscall); }34// CHECKX: define dso_local i32 @_Z11as_thiscallv()35// CHECKX: call i32 @_ZL11func_as_ptrIPU8thiscallFviiEEiT_(ptr @_Z10f_thiscallii)36 37// CHECK: define dso_local void @_Z11funcRefTypeRU8fastcallFviiE(ptr noundef nonnull %fr)38void funcRefType(void(__attribute__((fastcall)) & fr)(int, int)) {39 fr(1, 2);40}41 42struct Foo { void bar(int, int); };43 44// PR40107: In this case, the member function pointer uses the thiscall45// convention, but GCC doesn't mangle it, so we don't either.46// CHECK: define dso_local void @_Z15memptr_thiscallP3FooMS_FvvE(ptr {{.*}})47void memptr_thiscall(Foo *o, void (Foo::*mp)()) { (o->*mp)(); }48 49// CHECK: define dso_local void @_Z12memptrCCTypeR3FooMS_U8fastcallFviiE(ptr {{.*}}, ptr noundef byval{{.*}})50void memptrCCType(Foo &o, void (__attribute__((fastcall)) Foo::*mp)(int, int)) {51 (o.*mp)(1, 2);52}53 54// CHECK: define dso_local noundef i32 @_Z17useTemplateFnTypev()55// CHECK: call noundef i32 @_ZL14templateFnTypeIU8fastcallFviiEElPT_(ptr noundef @"\01@_Z10f_fastcallii@8")56template <typename Fn> static long templateFnType(Fn *fn) { return long(fn); }57long useTemplateFnType() { return templateFnType(f_fastcall); }58 59// CHECK: define weak_odr dso_local x86_fastcallcc void @"\01@_Z10fnTemplateIsEvv@0"()60// CHECK: define dso_local x86_fastcallcc void @"\01@_Z10fnTemplateIiEvv@0"()61template <typename T> void __attribute__((fastcall)) fnTemplate() {}62template void __attribute__((fastcall)) fnTemplate<short>();63template <> void __attribute__((fastcall)) fnTemplate<int>() {}64 65// CHECK: define weak_odr dso_local x86_fastcallcc noundef ptr @"\01@_Z12fnTempReturnIsEPU8fastcallFviiEv@0"()66// CHECK: define dso_local x86_fastcallcc noundef ptr @"\01@_Z12fnTempReturnIiEPU8fastcallFviiEv@0"()67typedef void (__attribute__((fastcall)) *fp_cc_t)(int, int);68template <typename T> fp_cc_t __attribute__((fastcall)) fnTempReturn() { return nullptr; }69template fp_cc_t __attribute__((fastcall)) fnTempReturn<short>();70template <> fp_cc_t __attribute__((fastcall)) fnTempReturn<int>() { return nullptr; }71