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llvm-project/llvm/test/Demangle/ms-operators.test
nerix 3641e269b0
[MsDemangle] Read entire chain of target names in special tables (#155630) 
When there's a deep inheritance hierarchy of multiple C++ classes (see
below), then the mangled name of a VFTable can include multiple key
nodes in the target name.
For example, in the following code, MSVC will generate mangled names for
the VFTables that have up to three key classes in the context.
<details><summary>Code</summary>

```cpp
class Base1 {
  virtual void a() {};
};
class Base2 {
  virtual void b() {}
};

class Ind1 : public Base1 {};
class Ind2 : public Base1 {};

class A : public Ind1, public Ind2 {};

class Ind3 : public A {};
class Ind4 : public A {};

class B : public Ind3, public Ind4 {};

class Ind5 : public B {};
class Ind6 : public B {};

class C : public Ind5, public Ind6 {};

int main() { auto i = new C; }
```
</details> 

This will include `??_7C@@6BInd1@@Ind4@@Ind5@@@` (and every other
combination). Microsoft's undname will demangle this to "const
C::\`vftable'{for \`Ind1's \`Ind4's \`Ind5'}". Previously, LLVM would
demangle this to "const C::\`vftable'{for \`Ind1'}".

With this PR, the output of LLVM's undname will be identical to
Microsoft's version. This changes `SpecialTableSymbolNode::TargetName`
to a node array which contains each key from the name. Unlike
namespaces, these keys are not in reverse order - they are in the same
order as in the mangled name.
2025-11-05 16:48:24 +01:00

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; RUN: llvm-undname < %s | FileCheck %s
; CHECK-NOT: Invalid mangled name
??0Base@@QEAA@XZ
; CHECK: __cdecl Base::Base(void)
??1Base@@UEAA@XZ
; CHECK: virtual __cdecl Base::~Base(void)
??2@YAPEAX_K@Z
; CHECK: void * __cdecl operator new(unsigned __int64)
??3@YAXPEAX_K@Z
; CHECK: void __cdecl operator delete(void *, unsigned __int64)
??4Base@@QEAAHH@Z
; CHECK: int __cdecl Base::operator=(int)
??6Base@@QEAAHH@Z
; CHECK: int __cdecl Base::operator<<(int)
??5Base@@QEAAHH@Z
; CHECK: int __cdecl Base::operator>>(int)
??7Base@@QEAAHXZ
; CHECK: int __cdecl Base::operator!(void)
??8Base@@QEAAHH@Z
; CHECK: int __cdecl Base::operator==(int)
??9Base@@QEAAHH@Z
; CHECK: int __cdecl Base::operator!=(int)
??ABase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator[](int)
??BBase@@QEAAHXZ
; CHECK: __cdecl Base::operator int(void)
??CBase@@QEAAHXZ
; CHECK: int __cdecl Base::operator->(void)
??DBase@@QEAAHXZ
; CHECK: int __cdecl Base::operator*(void)
??EBase@@QEAAHXZ
; CHECK: int __cdecl Base::operator++(void)
??EBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator++(int)
??FBase@@QEAAHXZ
; CHECK: int __cdecl Base::operator--(void)
??FBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator--(int)
??GBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator-(int)
??HBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator+(int)
??IBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator&(int)
??JBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator->*(int)
??KBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator/(int)
??LBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator%(int)
??MBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator<(int)
??NBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator<=(int)
??OBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator>(int)
??PBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator>=(int)
??QBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator,(int)
??RBase@@QEAAHXZ
; CHECK: int __cdecl Base::operator()(void)
??SBase@@QEAAHXZ
; CHECK: int __cdecl Base::operator~(void)
??TBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator^(int)
??UBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator|(int)
??VBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator&&(int)
??WBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator||(int)
??XBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator*=(int)
??YBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator+=(int)
??ZBase@@QEAAHH@Z
; CHECK: int __cdecl Base::operator-=(int)
??_0Base@@QEAAHH@Z
; CHECK: int __cdecl Base::operator/=(int)
??_1Base@@QEAAHH@Z
; CHECK: int __cdecl Base::operator%=(int)
??_2Base@@QEAAHH@Z
; CHECK: int __cdecl Base::operator>>=(int)
??_3Base@@QEAAHH@Z
; CHECK: int __cdecl Base::operator<<=(int)
??_4Base@@QEAAHH@Z
; CHECK: int __cdecl Base::operator&=(int)
??_5Base@@QEAAHH@Z
; CHECK: int __cdecl Base::operator|=(int)
??_6Base@@QEAAHH@Z
; CHECK: int __cdecl Base::operator^=(int)
??_7Base@@6B@
; CHECK: const Base::`vftable'
??_7A@B@@6BC@D@@@
; CHECK: const B::A::`vftable'{for `D::C'}
??_7A@B@@6BC@D@@E@F@@@
; CHECK: const B::A::`vftable'{for `D::C's `F::E'}
??_7A@B@@6BC@D@@E@F@@G@H@@@
; CHECK: const B::A::`vftable'{for `D::C's `F::E's `H::G'}
??_8Middle2@@7B@
; CHECK: const Middle2::`vbtable'
??_7A@@6BB@@@
; CHECK: const A::`vftable'{for `B'}
??_7A@@6BB@@C@@@
; CHECK: const A::`vftable'{for `B's `C'}
??_7A@@6BB@@C@@D@@@
; CHECK: const A::`vftable'{for `B's `C's `D'}
??_9Base@@$B7AA
; CHECK: [thunk]: __cdecl Base::`vcall'{8, {flat}}
??_B?1??getS@@YAAAUS@@XZ@51
; CHECK: `struct S & __cdecl getS(void)'::`2'::`local static guard'{2}
??_C@_02PCEFGMJL@hi?$AA@
; CHECK: "hi"
??_DDiamond@@QEAAXXZ
; CHECK: void __cdecl Diamond::`vbase dtor'(void)
??_EBase@@UEAAPEAXI@Z
; CHECK: virtual void * __cdecl Base::`vector deleting dtor'(unsigned int)
??_EBase@@G3AEPAXI@Z
; CHECK: [thunk]: private: void * __thiscall Base::`vector deleting dtor'`adjustor{4}'(unsigned int)
??_F?$SomeTemplate@H@@QAEXXZ
; CHECK: void __thiscall SomeTemplate<int>::`default ctor closure'(void)
??_GBase@@UEAAPEAXI@Z
; CHECK: virtual void * __cdecl Base::`scalar deleting dtor'(unsigned int)
??_H@YAXPEAX_K1P6APEAX0@Z@Z
; CHECK: void __cdecl `vector ctor iterator'(void *, unsigned __int64, unsigned __int64, void * (__cdecl *)(void *))
??_I@YAXPEAX_K1P6AX0@Z@Z
; CHECK: void __cdecl `vector dtor iterator'(void *, unsigned __int64, unsigned __int64, void (__cdecl *)(void *))
??_JBase@@UEAAPEAXI@Z
; CHECK: virtual void * __cdecl Base::`vector vbase ctor iterator'(unsigned int)
??_KBase@@UEAAPEAXI@Z
; CHECK: virtual void * __cdecl Base::`virtual displacement map'(unsigned int)
??_LBase@@UEAAPEAXI@Z
; CHECK: virtual void * __cdecl Base::`eh vector ctor iterator'(unsigned int)
??_MBase@@UEAAPEAXI@Z
; CHECK: virtual void * __cdecl Base::`eh vector dtor iterator'(unsigned int)
??_NBase@@UEAAPEAXI@Z
; CHECK: virtual void * __cdecl Base::`eh vector vbase ctor iterator'(unsigned int)
??_O?$SomeTemplate@H@@QAEXXZ
; CHECK: void __thiscall SomeTemplate<int>::`copy ctor closure'(void)
??_SBase@@6B@
; CHECK: const Base::`local vftable'
??_TDerived@@QEAAXXZ
; CHECK: void __cdecl Derived::`local vftable ctor closure'(void)
??_U@YAPEAX_KAEAVklass@@@Z
; CHECK: void * __cdecl operator new[](unsigned __int64, class klass &)
??_V@YAXPEAXAEAVklass@@@Z
; CHECK: void __cdecl operator delete[](void *, class klass &)
??_R0?AUBase@@@8
; CHECK: struct Base `RTTI Type Descriptor'
.?AUBase@@
; CHECK: struct Base `RTTI Type Descriptor Name'
??_R1A@?0A@EA@Base@@8
; CHECK: Base::`RTTI Base Class Descriptor at (0, -1, 0, 64)'
??_R2Base@@8
; CHECK: Base::`RTTI Base Class Array'
??_R3Base@@8
; CHECK: Base::`RTTI Class Hierarchy Descriptor'
??_R4Base@@6B@
; CHECK: const Base::`RTTI Complete Object Locator'
; Generated for `int Foo = f(4);` at global scope.
??__EFoo@@YAXXZ
; CHECK: void __cdecl `dynamic initializer for 'Foo''(void)
; Generated for
; class C { static int i; };
; int C::i = f(5);
??__E?i@C@@0HA@@YAXXZ
; CHECK: void __cdecl `dynamic initializer for `private: static int C::i''(void)
??__FFoo@@YAXXZ
; CHECK: void __cdecl `dynamic atexit destructor for 'Foo''(void)
??__F_decisionToDFA@XPathLexer@@0V?$vector@VDFA@dfa@antlr4@@V?$allocator@VDFA@dfa@antlr4@@@std@@@std@@A@YAXXZ
; CHECK: void __cdecl `dynamic atexit destructor for `private: static class std::vector<class antlr4::dfa::DFA, class std::allocator<class antlr4::dfa::DFA>> XPathLexer::_decisionToDFA''(void)
??__J?1??f@@YAAAUS@@XZ@51
; CHECK: `struct S & __cdecl f(void)'::`2'::`local static thread guard'{2}
??__K_deg@@YAHO@Z
; CHECK: int __cdecl operator ""_deg(long double)
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