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clang-p2996/clang/test/CodeGenCXX/mangle-ms-templates.cpp
Bolshakov cd93532dfc [MS ABI] Fix C++ mangling references to declarations. 
Several issues have been discovered and (hopefully) fixed here:

- Reference NTTPs should be mangled in the same manner as pointer
ones.

-  Pointer fields of class type NTTPs should be treated in the same
manner as reference ones.

- Pointer-to-member fields of class type NTTPs should be treated
differently compared to pointer-to-member NTTPs. Tests on
pointer-to-member-function NTTP class fields added.

- Correct mangling of pointers to anonymous union members.

- A bug in mangling references to subobjects fixed.

- Mangling array subscripts and base class members in references
to subobjects.

Reference NTTP mangling was done back in 2013
in e8fdc06e0d, and Microsoft might change
mangling algorithm since then. But class type NTTPs are introduced only
in C++20, and the test was written in
b637148ecb.
It is strange if the MS ABI had been realy changed, because Microsoft
claims that they maintain ABI stability since VS 2015. I've tested both
on v142 and v143 MSVC toolsets, and they show the same behavior
on the test cases which are changed in this PR. But
pointer-to-member-function NTTP class field mangling has been actually
changed, because it was erroneous in v142, leading to name collisions.

Moreover, pointer-to-member mangling with conversions across class
hierarchy has been enabled.

Differential Revision: https://reviews.llvm.org/D146386
2023-05-03 18:20:16 -07:00

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// RUN: %clang_cc1 -std=c++11 -fms-compatibility-version=19 -emit-llvm %s -o - -fms-extensions -fdelayed-template-parsing -triple=i386-pc-win32 | FileCheck %s
// RUN: %clang_cc1 -std=c++11 -fms-compatibility-version=19 -emit-llvm %s -o - -fms-extensions -fdelayed-template-parsing -triple=x86_64-pc-win32 | FileCheck -check-prefix X64 %s
// RUN: %clang_cc1 -std=c++17 -fms-compatibility-version=19 -emit-llvm %s -o - -fms-extensions -fdelayed-template-parsing -triple=i386-pc-win32 | FileCheck %s
// RUN: %clang_cc1 -std=c++17 -fms-compatibility-version=19 -emit-llvm %s -o - -fms-extensions -fdelayed-template-parsing -triple=x86_64-pc-win32 | FileCheck -check-prefix X64 %s
template<typename T>
class Class {
public:
Class() {}
};
class Typename { };
template<typename T>
class Nested { };
template<bool flag>
class BoolTemplate {
public:
BoolTemplate() {}
};
template<int param>
class IntTemplate {
public:
IntTemplate() {}
};
template<unsigned param>
class UnsignedIntTemplate {
public:
UnsignedIntTemplate() {}
};
template<long long param>
class LongLongTemplate {
public:
LongLongTemplate() {}
};
template<unsigned long long param>
class UnsignedLongLongTemplate {
public:
UnsignedLongLongTemplate() {}
};
template<>
class BoolTemplate<true> {
public:
BoolTemplate() {}
template<class T> void Foo(T arg) {}
};
void template_mangling() {
Class<Typename> c1;
// CHECK: call {{.*}} @"??0?$Class@VTypename@@@@QAE@XZ"
// X64: call {{.*}} @"??0?$Class@VTypename@@@@QEAA@XZ"
Class<const Typename> c1_const;
// CHECK: call {{.*}} @"??0?$Class@$$CBVTypename@@@@QAE@XZ"
// X64: call {{.*}} @"??0?$Class@$$CBVTypename@@@@QEAA@XZ"
Class<volatile Typename> c1_volatile;
// CHECK: call {{.*}} @"??0?$Class@$$CCVTypename@@@@QAE@XZ"
// X64: call {{.*}} @"??0?$Class@$$CCVTypename@@@@QEAA@XZ"
Class<const volatile Typename> c1_cv;
// CHECK: call {{.*}} @"??0?$Class@$$CDVTypename@@@@QAE@XZ"
// X64: call {{.*}} @"??0?$Class@$$CDVTypename@@@@QEAA@XZ"
Class<Nested<Typename> > c2;
// CHECK: call {{.*}} @"??0?$Class@V?$Nested@VTypename@@@@@@QAE@XZ"
// X64: call {{.*}} @"??0?$Class@V?$Nested@VTypename@@@@@@QEAA@XZ"
Class<int * const> c_intpc;
// CHECK: call {{.*}} @"??0?$Class@QAH@@QAE@XZ"
// X64: call {{.*}} @"??0?$Class@QEAH@@QEAA@XZ"
Class<int()> c_ft;
// CHECK: call {{.*}} @"??0?$Class@$$A6AHXZ@@QAE@XZ"
// X64: call {{.*}} @"??0?$Class@$$A6AHXZ@@QEAA@XZ"
Class<int[]> c_inti;
// CHECK: call {{.*}} @"??0?$Class@$$BY0A@H@@QAE@XZ"
// X64: call {{.*}} @"??0?$Class@$$BY0A@H@@QEAA@XZ"
Class<int[5]> c_int5;
// CHECK: call {{.*}} @"??0?$Class@$$BY04H@@QAE@XZ"
// X64: call {{.*}} @"??0?$Class@$$BY04H@@QEAA@XZ"
Class<const int[5]> c_intc5;
// CHECK: call {{.*}} @"??0?$Class@$$BY04$$CBH@@QAE@XZ"
// X64: call {{.*}} @"??0?$Class@$$BY04$$CBH@@QEAA@XZ"
Class<int * const[5]> c_intpc5;
// CHECK: call {{.*}} @"??0?$Class@$$BY04QAH@@QAE@XZ"
// X64: call {{.*}} @"??0?$Class@$$BY04QEAH@@QEAA@XZ"
BoolTemplate<false> _false;
// CHECK: call {{.*}} @"??0?$BoolTemplate@$0A@@@QAE@XZ"
// X64: call {{.*}} @"??0?$BoolTemplate@$0A@@@QEAA@XZ"
BoolTemplate<true> _true;
// PR13158
_true.Foo(1);
// CHECK: call {{.*}} @"??0?$BoolTemplate@$00@@QAE@XZ"
// X64: call {{.*}} @"??0?$BoolTemplate@$00@@QEAA@XZ"
// CHECK: call {{.*}} @"??$Foo@H@?$BoolTemplate@$00@@QAEXH@Z"
// X64: call {{.*}} @"??$Foo@H@?$BoolTemplate@$00@@QEAAXH@Z"
IntTemplate<0> zero;
// CHECK: call {{.*}} @"??0?$IntTemplate@$0A@@@QAE@XZ"
// X64: call {{.*}} @"??0?$IntTemplate@$0A@@@QEAA@XZ"
IntTemplate<5> five;
// CHECK: call {{.*}} @"??0?$IntTemplate@$04@@QAE@XZ"
// X64: call {{.*}} @"??0?$IntTemplate@$04@@QEAA@XZ"
IntTemplate<11> eleven;
// CHECK: call {{.*}} @"??0?$IntTemplate@$0L@@@QAE@XZ"
// X64: call {{.*}} @"??0?$IntTemplate@$0L@@@QEAA@XZ"
IntTemplate<256> _256;
// CHECK: call {{.*}} @"??0?$IntTemplate@$0BAA@@@QAE@XZ"
// X64: call {{.*}} @"??0?$IntTemplate@$0BAA@@@QEAA@XZ"
IntTemplate<513> _513;
// CHECK: call {{.*}} @"??0?$IntTemplate@$0CAB@@@QAE@XZ"
// X64: call {{.*}} @"??0?$IntTemplate@$0CAB@@@QEAA@XZ"
IntTemplate<1026> _1026;
// CHECK: call {{.*}} @"??0?$IntTemplate@$0EAC@@@QAE@XZ"
// X64: call {{.*}} @"??0?$IntTemplate@$0EAC@@@QEAA@XZ"
IntTemplate<65535> ffff;
// CHECK: call {{.*}} @"??0?$IntTemplate@$0PPPP@@@QAE@XZ"
// X64: call {{.*}} @"??0?$IntTemplate@$0PPPP@@@QEAA@XZ"
IntTemplate<-1> neg_1;
// CHECK: call {{.*}} @"??0?$IntTemplate@$0?0@@QAE@XZ"
// X64: call {{.*}} @"??0?$IntTemplate@$0?0@@QEAA@XZ"
IntTemplate<-9> neg_9;
// CHECK: call {{.*}} @"??0?$IntTemplate@$0?8@@QAE@XZ"
// X64: call {{.*}} @"??0?$IntTemplate@$0?8@@QEAA@XZ"
IntTemplate<-10> neg_10;
// CHECK: call {{.*}} @"??0?$IntTemplate@$0?9@@QAE@XZ"
// X64: call {{.*}} @"??0?$IntTemplate@$0?9@@QEAA@XZ"
IntTemplate<-11> neg_11;
// CHECK: call {{.*}} @"??0?$IntTemplate@$0?L@@@QAE@XZ"
// X64: call {{.*}} @"??0?$IntTemplate@$0?L@@@QEAA@XZ"
UnsignedIntTemplate<4294967295> ffffffff;
// CHECK: call {{.*}} @"??0?$UnsignedIntTemplate@$0PPPPPPPP@@@QAE@XZ"
// X64: call {{.*}} @"??0?$UnsignedIntTemplate@$0PPPPPPPP@@@QEAA@XZ"
LongLongTemplate<-9223372036854775807LL-1LL> int64_min;
// CHECK: call {{.*}} @"??0?$LongLongTemplate@$0?IAAAAAAAAAAAAAAA@@@QAE@XZ"
// X64: call {{.*}} @"??0?$LongLongTemplate@$0?IAAAAAAAAAAAAAAA@@@QEAA@XZ"
LongLongTemplate<9223372036854775807LL> int64_max;
// CHECK: call {{.*}} @"??0?$LongLongTemplate@$0HPPPPPPPPPPPPPPP@@@QAE@XZ"
// X64: call {{.*}} @"??0?$LongLongTemplate@$0HPPPPPPPPPPPPPPP@@@QEAA@XZ"
UnsignedLongLongTemplate<18446744073709551615ULL> uint64_max;
// CHECK: call {{.*}} @"??0?$UnsignedLongLongTemplate@$0?0@@QAE@XZ"
// X64: call {{.*}} @"??0?$UnsignedLongLongTemplate@$0?0@@QEAA@XZ"
UnsignedLongLongTemplate<(unsigned long long)-1> uint64_neg_1;
// CHECK: call {{.*}} @"??0?$UnsignedLongLongTemplate@$0?0@@QAE@XZ"
// X64: call {{.*}} @"??0?$UnsignedLongLongTemplate@$0?0@@QEAA@XZ"
}
namespace space {
template<class T> const T& foo(const T& l) { return l; }
}
// CHECK: "??$foo@H@space@@YAABHABH@Z"
// X64: "??$foo@H@space@@YAAEBHAEBH@Z"
void use() {
space::foo(42);
}
// PR13455
typedef void (*FunctionPointer)(void);
template <FunctionPointer function>
void FunctionPointerTemplate() {
function();
}
void spam() {
FunctionPointerTemplate<spam>();
// CHECK: "??$FunctionPointerTemplate@$1?spam@@YAXXZ@@YAXXZ"
// X64: "??$FunctionPointerTemplate@$1?spam@@YAXXZ@@YAXXZ"
}
// Unlike Itanium, there is no character code to indicate an argument pack.
// Tested with MSVC 2013, the first version which supports variadic templates.
template <typename ...Ts> void variadic_fn_template(const Ts &...args);
template <typename... Ts, typename... Us>
void multi_variadic_fn(Ts... ts, Us... us);
template <typename... Ts, typename C, typename... Us>
void multi_variadic_mixed(Ts... ts, C c, Us... us);
void variadic_fn_instantiate() {
variadic_fn_template(0, 1, 3, 4);
variadic_fn_template(0, 1, 'a', "b");
// Directlly consecutive packs are separated by $$Z...
multi_variadic_fn<int, int>(1, 2, 3, 4, 5);
multi_variadic_fn<int, int, int>(1, 2, 3, 4, 5);
// ...but not if another template parameter is between them.
multi_variadic_mixed<int, int>(1, 2, 3);
multi_variadic_mixed<int, int>(1, 2, 3, 4);
}
// CHECK: "??$variadic_fn_template@HHHH@@YAXABH000@Z"
// X64: "??$variadic_fn_template@HHHH@@YAXAEBH000@Z"
// CHECK: "??$variadic_fn_template@HHD$$BY01D@@YAXABH0ABDAAY01$$CBD@Z"
// X64: "??$variadic_fn_template@HHD$$BY01D@@YAXAEBH0AEBDAEAY01$$CBD@Z"
// CHECK: "??$multi_variadic_fn@HH$$ZHHH@@YAXHHHHH@Z"
// X64: "??$multi_variadic_fn@HH$$ZHHH@@YAXHHHHH@Z"
// CHECK: "??$multi_variadic_fn@HHH$$ZHH@@YAXHHHHH@Z"
// X64: "??$multi_variadic_fn@HHH$$ZHH@@YAXHHHHH@Z"
// CHECK: "??$multi_variadic_mixed@HHH$$V@@YAXHHH@Z"
// X64: "??$multi_variadic_mixed@HHH$$V@@YAXHHH@Z"
// CHECK: "??$multi_variadic_mixed@HHHH@@YAXHHHH@Z"
// X64: "??$multi_variadic_mixed@HHHH@@YAXHHHH@Z"
template <typename ...Ts>
struct VariadicClass {
VariadicClass() { }
int x;
};
void variadic_class_instantiate() {
VariadicClass<int, char, bool> a;
VariadicClass<bool, char, int> b;
}
// CHECK: call {{.*}} @"??0?$VariadicClass@HD_N@@QAE@XZ"
// CHECK: call {{.*}} @"??0?$VariadicClass@_NDH@@QAE@XZ"
template <typename T>
struct Second {};
template <typename T, template <class> class>
struct Type {};
template <template <class> class T>
struct Type2 {};
template <template <class> class T, bool B>
struct Thing;
template <template <class> class T>
struct Thing<T, false> { };
template <template <class> class T>
struct Thing<T, true> { };
void template_template_fun(Type<Thing<Second, true>, Second>) { }
// CHECK: "?template_template_fun@@YAXU?$Type@U?$Thing@USecond@@$00@@USecond@@@@@Z"
template <typename T>
void template_template_specialization();
template <>
void template_template_specialization<void (Type<Thing<Second, true>, Second>)>() {
}
// CHECK: "??$template_template_specialization@$$A6AXU?$Type@U?$Thing@USecond@@$00@@USecond@@@@@Z@@YAXXZ"
// PR16788
template <decltype(nullptr)> struct S1 {};
void f(S1<nullptr>) {}
// CHECK: "?f@@YAXU?$S1@$0A@@@@Z"
struct record {
int first;
int second;
};
template <const record &>
struct type1 {
};
extern const record inst;
void recref(type1<inst>) {}
// CHECK: "?recref@@YAXU?$type1@$1?inst@@3Urecord@@B@@@Z"
struct _GUID {};
struct __declspec(uuid("{12345678-1234-1234-1234-1234567890aB}")) uuid;
template <typename T, const _GUID *G = &__uuidof(T)>
struct UUIDType1 {};
template <typename T, const _GUID &G = __uuidof(T)>
struct UUIDType2 {};
void fun(UUIDType1<uuid> a) {}
// CHECK: "?fun@@YAXU?$UUIDType1@Uuuid@@$1?_GUID_12345678_1234_1234_1234_1234567890ab@@3U__s_GUID@@B@@@Z"
void fun(UUIDType2<uuid> b) {}
// CHECK: "?fun@@YAXU?$UUIDType2@Uuuid@@$1?_GUID_12345678_1234_1234_1234_1234567890ab@@3U__s_GUID@@B@@@Z"
template <typename T> struct TypeWithFriendDefinition {
friend void FunctionDefinedWithInjectedName(TypeWithFriendDefinition<T>) {}
};
// CHECK: call {{.*}} @"?FunctionDefinedWithInjectedName@@YAXU?$TypeWithFriendDefinition@H@@@Z"
void CallFunctionDefinedWithInjectedName() {
FunctionDefinedWithInjectedName(TypeWithFriendDefinition<int>());
}
// CHECK: @"?FunctionDefinedWithInjectedName@@YAXU?$TypeWithFriendDefinition@H@@@Z"
// We need to be able to feed GUIDs through a couple rounds of template
// substitution.
template <const _GUID *G>
struct UUIDType3 {
void foo() {}
};
template <const _GUID *G>
struct UUIDType4 : UUIDType3<G> {
void bar() { UUIDType4::foo(); }
};
template struct UUIDType4<&__uuidof(uuid)>;
// CHECK: "?bar@?$UUIDType4@$1?_GUID_12345678_1234_1234_1234_1234567890ab@@3U__s_GUID@@B@@QAEXXZ"
// CHECK: "?foo@?$UUIDType3@$1?_GUID_12345678_1234_1234_1234_1234567890ab@@3U__s_GUID@@B@@QAEXXZ"
#ifdef _WIN64
template<__int128 N> struct Int128 {};
template<unsigned __int128 N> struct UInt128 {};
// X64: define {{.*}} @"?fun_int128@@YAXU?$Int128@$0A@@@@Z"(
void fun_int128(Int128<0>) {}
// X64: define {{.*}} @"?fun_int128@@YAXU?$Int128@$0?0@@@Z"(
void fun_int128(Int128<-1>) {}
// X64: define {{.*}} @"?fun_int128@@YAXU?$Int128@$0DPPPPPPPPPPPPPPPAAAAAAAAAAAAAAAB@@@@Z"(
void fun_int128(Int128<(__int128)9223372036854775807 * (__int128)9223372036854775807>) {}
// X64: define {{.*}} @"?fun_uint128@@YAXU?$UInt128@$0A@@@@Z"(
void fun_uint128(UInt128<0>) {}
// X64: define {{.*}} @"?fun_uint128@@YAXU?$UInt128@$0?0@@@Z"(
void fun_uint128(UInt128<(unsigned __int128)-1>) {}
// X64: define {{.*}} @"?fun_uint128@@YAXU?$UInt128@$0DPPPPPPPPPPPPPPPAAAAAAAAAAAAAAAB@@@@Z"(
void fun_uint128(UInt128<(unsigned __int128)9223372036854775807 * (unsigned __int128)9223372036854775807>) {}
#endif
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