clang/test/CodeGenCXX/dllexport.cpp

// RUN: %clang_cc1 -triple i686-windows-msvc   -emit-llvm -std=c++1y -O0 -o - %s | FileCheck --check-prefix=MSC --check-prefix=M32 %s
// RUN: %clang_cc1 -triple x86_64-windows-msvc -emit-llvm -std=c++1y -O0 -o - %s | FileCheck --check-prefix=MSC --check-prefix=M64 %s
// RUN: %clang_cc1 -triple i686-windows-gnu    -emit-llvm -std=c++1y -O0 -o - %s | FileCheck --check-prefix=GNU --check-prefix=G32 %s
// RUN: %clang_cc1 -triple x86_64-windows-gnu  -emit-llvm -std=c++1y -O0 -o - %s | FileCheck --check-prefix=GNU --check-prefix=G64 %s

// RUN: %clang_cc1 -triple i686-pc-win32 -O1 -mconstructor-aliases -std=c++1y -emit-llvm -o - %s | FileCheck %s --check-prefix=MSC --check-prefix=M32

// Helper structs to make templates more expressive.
struct ImplicitInst_Exported {};
struct ExplicitDecl_Exported {};
struct ExplicitInst_Exported {};
struct ExplicitSpec_Exported {};
struct ExplicitSpec_Def_Exported {};
struct ExplicitSpec_InlineDef_Exported {};
struct ExplicitSpec_NotExported {};
struct External { int v; };

#define JOIN2(x, y) x##y
#define JOIN(x, y) JOIN2(x, y)
#define UNIQ(name) JOIN(name, __LINE__)
#define USEVAR(var) int UNIQ(use)() { return var; }
#define USE(func) void UNIQ(use)() { func(); }
#define USEMEMFUNC(class, func) void (class::*UNIQ(use)())() { return &class::func; }
#define INSTVAR(var) template int var;
#define INST(func) template void func();

// The vftable for struct W is comdat largest because we have RTTI.
// M32-DAG: $"\01??_7W@@6B@" = comdat largest


//===----------------------------------------------------------------------===//
// Globals
//===----------------------------------------------------------------------===//

// Declarations are not exported.
// MSC-NOT: @"\01?ExternGlobalDecl@@3HA"
// GNU-NOT: @ExternGlobalDecl
__declspec(dllexport) extern int ExternGlobalDecl;

// dllexport implies a definition.
// MSC-DAG: @"\01?GlobalDef@@3HA" = dllexport global i32 0, align 4
// GNU-DAG: @GlobalDef            = dllexport global i32 0, align 4
__declspec(dllexport) int GlobalDef;

// Export definition.
// MSC-DAG: @"\01?GlobalInit1@@3HA" = dllexport global i32 1, align 4
// GNU-DAG: @GlobalInit1            = dllexport global i32 1, align 4
__declspec(dllexport) int GlobalInit1 = 1;

// MSC-DAG: @"\01?GlobalInit2@@3HA" = dllexport global i32 1, align 4
// GNU-DAG: @GlobalInit2            = dllexport global i32 1, align 4
int __declspec(dllexport) GlobalInit2 = 1;

// Declare, then export definition.
// MSC-DAG: @"\01?GlobalDeclInit@@3HA" = dllexport global i32 1, align 4
// GNU-DAG: @GlobalDeclInit            = dllexport global i32 1, align 4
__declspec(dllexport) extern int GlobalDeclInit;
int GlobalDeclInit = 1;

// Redeclarations
// MSC-DAG: @"\01?GlobalRedecl1@@3HA" = dllexport global i32 0, align 4
// GNU-DAG: @GlobalRedecl1            = dllexport global i32 0, align 4
__declspec(dllexport) extern int GlobalRedecl1;
__declspec(dllexport)        int GlobalRedecl1;

// MSC-DAG: @"\01?GlobalRedecl2@@3HA" = dllexport global i32 0, align 4
// GNU-DAG: @GlobalRedecl2            = dllexport global i32 0, align 4
__declspec(dllexport) extern int GlobalRedecl2;
                             int GlobalRedecl2;

// MSC-DAG: @"\01?ExternalGlobal@ns@@3HA" = dllexport global i32 0, align 4
// GNU-DAG: @_ZN2ns14ExternalGlobalE      = dllexport global i32 0, align 4
namespace ns { __declspec(dllexport) int ExternalGlobal; }

// MSC-DAG: @"\01?ExternalAutoTypeGlobal@@3UExternal@@A" = dllexport global %struct.External zeroinitializer, align 4
// GNU-DAG: @ExternalAutoTypeGlobal                      = dllexport global %struct.External zeroinitializer, align 4
__declspec(dllexport) auto ExternalAutoTypeGlobal = External();

int f();
// MSC-DAG: @"\01?x@?0??nonInlineStaticLocalsFunc@@YAHXZ@4HA" = internal {{(unnamed_addr )*}}global i32 0
// MSC-DAG: @"\01?$S1@?0??nonInlineStaticLocalsFunc@@YAHXZ@4IA" = internal {{(unnamed_addr )*}}global i32 0
int __declspec(dllexport) nonInlineStaticLocalsFunc() {
  static int x = f();
  return x++;
};

// MSC-DAG: @"\01?x@?1??inlineStaticLocalsFunc@@YAHXZ@4HA" = weak_odr dllexport global i32 0
// MSC-DAG: @"\01??_B?1??inlineStaticLocalsFunc@@YAHXZ@51" = weak_odr dllexport global i32 0
// Note: MinGW doesn't seem to export the static local here.
inline int __declspec(dllexport) inlineStaticLocalsFunc() {
  static int x = f();
  return x++;
}



//===----------------------------------------------------------------------===//
// Variable templates
//===----------------------------------------------------------------------===//

// Declarations are not exported.

// dllexport implies a definition.
// MSC-NOT: @"\01??$VarTmplDef@UExplicitInst_Exported@@@@3HA"
// GNU-NOT: @_Z10VarTmplDefI21ExplicitInst_ExportedE
template<typename T> __declspec(dllexport) int VarTmplDef;
INSTVAR(VarTmplDef<ExplicitInst_Exported>)

// MSC-DAG: @"\01??$VarTmplImplicitDef@UImplicitInst_Exported@@@@3HA" = external dllexport global
// GNU-DAG: @_Z18VarTmplImplicitDefI21ImplicitInst_ExportedE          = external dllexport global
template<typename T> __declspec(dllexport) int VarTmplImplicitDef;
USEVAR(VarTmplImplicitDef<ImplicitInst_Exported>)

// Export definition.
// MSC-DAG: @"\01??$VarTmplInit1@UExplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, align 4
// GNU-DAG: @_Z12VarTmplInit1I21ExplicitInst_ExportedE          = weak_odr dllexport global i32 1, align 4
template<typename T> __declspec(dllexport) int VarTmplInit1 = 1;
INSTVAR(VarTmplInit1<ExplicitInst_Exported>)

// MSC-DAG: @"\01??$VarTmplInit2@UExplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, align 4
// GNU-DAG: @_Z12VarTmplInit2I21ExplicitInst_ExportedE          = weak_odr dllexport global i32 1, align 4
template<typename T> int __declspec(dllexport) VarTmplInit2 = 1;
INSTVAR(VarTmplInit2<ExplicitInst_Exported>)

// Declare, then export definition.
// MSC-DAG: @"\01??$VarTmplDeclInit@UExplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, align 4
// GNU-DAG: @_Z15VarTmplDeclInitI21ExplicitInst_ExportedE          = weak_odr dllexport global i32 1, align 4
template<typename T> __declspec(dllexport) extern int VarTmplDeclInit;
template<typename T>                              int VarTmplDeclInit = 1;
INSTVAR(VarTmplDeclInit<ExplicitInst_Exported>)

// Redeclarations
// MSC-DAG: @"\01??$VarTmplRedecl1@UExplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, align 4
// GNU-DAG: @_Z14VarTmplRedecl1I21ExplicitInst_ExportedE          = weak_odr dllexport global i32 1, align 4
template<typename T> __declspec(dllexport) extern int VarTmplRedecl1;
template<typename T> __declspec(dllexport)        int VarTmplRedecl1 = 1;
INSTVAR(VarTmplRedecl1<ExplicitInst_Exported>)

// MSC-DAG: @"\01??$VarTmplRedecl2@UExplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, align 4
// GNU-DAG: @_Z14VarTmplRedecl2I21ExplicitInst_ExportedE          = weak_odr dllexport global i32 1, align 4
template<typename T> __declspec(dllexport) extern int VarTmplRedecl2;
template<typename T>                              int VarTmplRedecl2 = 1;
INSTVAR(VarTmplRedecl2<ExplicitInst_Exported>)

// MSC-DAG: @"\01??$ExternalVarTmpl@UExplicitInst_Exported@@@ns@@3HA" = weak_odr dllexport global i32 1, align 4
// GNU-DAG: @_ZN2ns15ExternalVarTmplI21ExplicitInst_ExportedEE        = weak_odr dllexport global i32 1, align 4
namespace ns { template<typename T> __declspec(dllexport) int ExternalVarTmpl = 1; }
INSTVAR(ns::ExternalVarTmpl<ExplicitInst_Exported>)

// MSC-DAG: @"\01??$ExternalAutoTypeVarTmpl@UExplicitInst_Exported@@@@3UExternal@@A" = weak_odr dllexport global %struct.External zeroinitializer, align 4
// GNU-DAG: @_Z23ExternalAutoTypeVarTmplI21ExplicitInst_ExportedE                    = weak_odr dllexport global %struct.External zeroinitializer, align 4
template<typename T> __declspec(dllexport) auto ExternalAutoTypeVarTmpl = External();
template External ExternalAutoTypeVarTmpl<ExplicitInst_Exported>;


template<typename T> int VarTmpl = 1;
template<typename T> __declspec(dllexport) int ExportedVarTmpl = 1;

// Export implicit instantiation of an exported variable template.
// MSC-DAG: @"\01??$ExportedVarTmpl@UImplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, align 4
// GNU-DAG: @_Z15ExportedVarTmplI21ImplicitInst_ExportedE          = weak_odr dllexport global i32 1, align 4
USEVAR(ExportedVarTmpl<ImplicitInst_Exported>)

// Export explicit instantiation declaration of an exported variable template.
// MSC-DAG: @"\01??$ExportedVarTmpl@UImplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, align 4
// GNU-DAG: @_Z15ExportedVarTmplI21ExplicitDecl_ExportedE          = weak_odr dllexport global i32 1, align 4
extern template int ExportedVarTmpl<ExplicitDecl_Exported>;
       template int ExportedVarTmpl<ExplicitDecl_Exported>;

// Export explicit instantiation definition of an exported variable template.
// MSC-DAG: @"\01??$ExportedVarTmpl@UImplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, align 4
// GNU-DAG: @_Z15ExportedVarTmplI21ExplicitInst_ExportedE          = weak_odr dllexport global i32 1, align 4
template __declspec(dllexport) int ExportedVarTmpl<ExplicitInst_Exported>;

// Export specialization of an exported variable template.
// MSC-DAG: @"\01??$ExportedVarTmpl@UExplicitSpec_Exported@@@@3HA" = dllexport global i32 0, align 4
// GNU-DAG: @_Z15ExportedVarTmplI21ExplicitSpec_ExportedE          = dllexport global i32 0, align 4
template<> __declspec(dllexport) int ExportedVarTmpl<ExplicitSpec_Exported>;

// MSC-DAG: @"\01??$ExportedVarTmpl@UExplicitSpec_Def_Exported@@@@3HA" = dllexport global i32 1, align 4
// GNU-DAG: @_Z15ExportedVarTmplI25ExplicitSpec_Def_ExportedE          = dllexport global i32 1, align 4
template<> __declspec(dllexport) int ExportedVarTmpl<ExplicitSpec_Def_Exported> = 1;

// Not exporting specialization of an exported variable template without
// explicit dllexport.
// MSC-DAG: @"\01??$ExportedVarTmpl@UExplicitSpec_NotExported@@@@3HA" = global i32 0, align 4
// GNU-DAG: @_Z15ExportedVarTmplI24ExplicitSpec_NotExportedE          = global i32 0, align 4
template<> int ExportedVarTmpl<ExplicitSpec_NotExported>;


// Export explicit instantiation declaration of a non-exported variable template.
// MSC-DAG: @"\01??$VarTmpl@UExplicitDecl_Exported@@@@3HA" = weak_odr dllexport global i32 1, align 4
// GNU-DAG: @_Z7VarTmplI21ExplicitDecl_ExportedE           = weak_odr dllexport global i32 1, align 4
extern template __declspec(dllexport) int VarTmpl<ExplicitDecl_Exported>;
       template __declspec(dllexport) int VarTmpl<ExplicitDecl_Exported>;

// Export explicit instantiation definition of a non-exported variable template.
// MSC-DAG: @"\01??$VarTmpl@UExplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, align 4
// GNU-DAG: @_Z7VarTmplI21ExplicitInst_ExportedE           = weak_odr dllexport global i32 1, align 4
template __declspec(dllexport) int VarTmpl<ExplicitInst_Exported>;

// Export specialization of a non-exported variable template.
// MSC-DAG: @"\01??$VarTmpl@UExplicitSpec_Exported@@@@3HA" = dllexport global i32 0, align 4
// GNU-DAG: @_Z7VarTmplI21ExplicitSpec_ExportedE           = dllexport global i32 0, align 4
template<> __declspec(dllexport) int VarTmpl<ExplicitSpec_Exported>;

// MSC-DAG: @"\01??$VarTmpl@UExplicitSpec_Def_Exported@@@@3HA" = dllexport global i32 1, align 4
// GNU-DAG: @_Z7VarTmplI25ExplicitSpec_Def_ExportedE           = dllexport global i32 1, align 4
template<> __declspec(dllexport) int VarTmpl<ExplicitSpec_Def_Exported> = 1;



//===----------------------------------------------------------------------===//
// Functions
//===----------------------------------------------------------------------===//

// Declarations are not exported.

// Export function definition.
// MSC-DAG: define dllexport void @"\01?def@@YAXXZ"()
// GNU-DAG: define dllexport void @_Z3defv()
__declspec(dllexport) void def() {}

// extern "C"
// MSC-DAG: define dllexport void @externC()
// GNU-DAG: define dllexport void @externC()
extern "C" __declspec(dllexport) void externC() {}

// Export inline function.
// MSC-DAG: define weak_odr dllexport void @"\01?inlineFunc@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z10inlineFuncv()
__declspec(dllexport) inline void inlineFunc() {}

// MSC-DAG: define weak_odr dllexport void @"\01?inlineDecl@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z10inlineDeclv()
__declspec(dllexport) inline void inlineDecl();
                             void inlineDecl() {}

// MSC-DAG: define weak_odr dllexport void @"\01?inlineDef@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z9inlineDefv()
__declspec(dllexport) void inlineDef();
               inline void inlineDef() {}

// Redeclarations
// MSC-DAG: define dllexport void @"\01?redecl1@@YAXXZ"()
// GNU-DAG: define dllexport void @_Z7redecl1v()
__declspec(dllexport) void redecl1();
__declspec(dllexport) void redecl1() {}

// MSC-DAG: define dllexport void @"\01?redecl2@@YAXXZ"()
// GNU-DAG: define dllexport void @_Z7redecl2v()
__declspec(dllexport) void redecl2();
                      void redecl2() {}

// Friend functions
// MSC-DAG: define dllexport void @"\01?friend1@@YAXXZ"()
// GNU-DAG: define dllexport void @_Z7friend1v()
// MSC-DAG: define dllexport void @"\01?friend2@@YAXXZ"()
// GNU-DAG: define dllexport void @_Z7friend2v()
struct FuncFriend {
  friend __declspec(dllexport) void friend1();
  friend __declspec(dllexport) void friend2();
};
__declspec(dllexport) void friend1() {}
                      void friend2() {}

// Implicit declarations can be redeclared with dllexport.
// MSC-DAG: define dllexport noalias i8* @"\01??2@{{YAPAXI|YAPEAX_K}}@Z"(
// GNU-DAG: define dllexport noalias i8* @_Znw{{[yj]}}(
void* alloc(__SIZE_TYPE__ n);
__declspec(dllexport) void* operator new(__SIZE_TYPE__ n) { return alloc(n); }

// MSC-DAG: define dllexport void @"\01?externalFunc@ns@@YAXXZ"()
// GNU-DAG: define dllexport void @_ZN2ns12externalFuncEv()
namespace ns { __declspec(dllexport) void externalFunc() {} }



//===----------------------------------------------------------------------===//
// Function templates
//===----------------------------------------------------------------------===//

// Export function template definition.
// MSC-DAG: define weak_odr dllexport void @"\01??$funcTmplDef@UExplicitInst_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z11funcTmplDefI21ExplicitInst_ExportedEvv()
template<typename T> __declspec(dllexport) void funcTmplDef() {}
INST(funcTmplDef<ExplicitInst_Exported>)

// Export inline function template.
// MSC-DAG: define weak_odr dllexport void @"\01??$inlineFuncTmpl1@UExplicitInst_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z15inlineFuncTmpl1I21ExplicitInst_ExportedEvv()
template<typename T> __declspec(dllexport) inline void inlineFuncTmpl1() {}
INST(inlineFuncTmpl1<ExplicitInst_Exported>)

// MSC-DAG: define weak_odr dllexport void @"\01??$inlineFuncTmpl2@UExplicitInst_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z15inlineFuncTmpl2I21ExplicitInst_ExportedEvv()
template<typename T> inline void __attribute__((dllexport)) inlineFuncTmpl2() {}
INST(inlineFuncTmpl2<ExplicitInst_Exported>)

// MSC-DAG: define weak_odr dllexport void @"\01??$inlineFuncTmplDecl@UExplicitInst_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z18inlineFuncTmplDeclI21ExplicitInst_ExportedEvv()
template<typename T> __declspec(dllexport) inline void inlineFuncTmplDecl();
template<typename T>                              void inlineFuncTmplDecl() {}
INST(inlineFuncTmplDecl<ExplicitInst_Exported>)

// MSC-DAG: define weak_odr dllexport void @"\01??$inlineFuncTmplDef@UExplicitInst_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z17inlineFuncTmplDefI21ExplicitInst_ExportedEvv()
template<typename T> __declspec(dllexport) void inlineFuncTmplDef();
template<typename T>                inline void inlineFuncTmplDef() {}
INST(inlineFuncTmplDef<ExplicitInst_Exported>)


// Redeclarations
// MSC-DAG: define weak_odr dllexport void @"\01??$funcTmplRedecl1@UExplicitInst_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z15funcTmplRedecl1I21ExplicitInst_ExportedEvv()
template<typename T> __declspec(dllexport) void funcTmplRedecl1();
template<typename T> __declspec(dllexport) void funcTmplRedecl1() {}
INST(funcTmplRedecl1<ExplicitInst_Exported>)

// MSC-DAG: define weak_odr dllexport void @"\01??$funcTmplRedecl2@UExplicitInst_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z15funcTmplRedecl2I21ExplicitInst_ExportedEvv()
template<typename T> __declspec(dllexport) void funcTmplRedecl2();
template<typename T>                       void funcTmplRedecl2() {}
INST(funcTmplRedecl2<ExplicitInst_Exported>)

// MSC-DAG: define weak_odr dllexport void @"\01??$funcTmplRedecl3@UExplicitInst_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z15funcTmplRedecl3I21ExplicitInst_ExportedEvv()
template<typename T> __declspec(dllexport) void funcTmplRedecl3();
template<typename T>                       void funcTmplRedecl3() {}
INST(funcTmplRedecl3<ExplicitInst_Exported>)


// Function template friends
// MSC-DAG: define weak_odr dllexport void @"\01??$funcTmplFriend1@UExplicitInst_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z15funcTmplFriend1I21ExplicitInst_ExportedEvv()
// MSC-DAG: define weak_odr dllexport void @"\01??$funcTmplFriend2@UExplicitInst_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z15funcTmplFriend2I21ExplicitInst_ExportedEvv()
struct FuncTmplFriend {
  template<typename T> friend __declspec(dllexport) void funcTmplFriend1();
  template<typename T> friend __declspec(dllexport) void funcTmplFriend2();
};
template<typename T> __declspec(dllexport) void funcTmplFriend1() {}
template<typename T>                       void funcTmplFriend2() {}
INST(funcTmplFriend1<ExplicitInst_Exported>)
INST(funcTmplFriend2<ExplicitInst_Exported>)

// MSC-DAG: define weak_odr dllexport void @"\01??$externalFuncTmpl@UExplicitInst_Exported@@@ns@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_ZN2ns16externalFuncTmplI21ExplicitInst_ExportedEEvv()
namespace ns { template<typename T> __declspec(dllexport) void externalFuncTmpl() {} }
INST(ns::externalFuncTmpl<ExplicitInst_Exported>)


template<typename T> void funcTmpl() {}
template<typename T> __declspec(dllexport) void exportedFuncTmpl() {}

// Export implicit instantiation of an exported function template.
// MSC-DAG: define weak_odr dllexport void @"\01??$exportedFuncTmpl@UImplicitInst_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z16exportedFuncTmplI21ImplicitInst_ExportedEvv()
USE(exportedFuncTmpl<ImplicitInst_Exported>)

// Export explicit instantiation declaration of an exported function template.
// MSC-DAG: define weak_odr dllexport void @"\01??$exportedFuncTmpl@UExplicitDecl_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z16exportedFuncTmplI21ExplicitDecl_ExportedEvv()
extern template void exportedFuncTmpl<ExplicitDecl_Exported>();
       template void exportedFuncTmpl<ExplicitDecl_Exported>();

// Export explicit instantiation definition of an exported function template.
// MSC-DAG: define weak_odr dllexport void @"\01??$exportedFuncTmpl@UExplicitInst_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z16exportedFuncTmplI21ExplicitInst_ExportedEvv()
template void exportedFuncTmpl<ExplicitInst_Exported>();

// Export specialization of an exported function template.
// MSC-DAG: define dllexport void @"\01??$exportedFuncTmpl@UExplicitSpec_Def_Exported@@@@YAXXZ"()
// GNU-DAG: define dllexport void @_Z16exportedFuncTmplI25ExplicitSpec_Def_ExportedEvv()
template<> __declspec(dllexport) void exportedFuncTmpl<ExplicitSpec_Def_Exported>() {}

// MSC-DAG: define weak_odr dllexport void @"\01??$exportedFuncTmpl@UExplicitSpec_InlineDef_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z16exportedFuncTmplI31ExplicitSpec_InlineDef_ExportedEvv()
template<> __declspec(dllexport) inline void exportedFuncTmpl<ExplicitSpec_InlineDef_Exported>() {}

// Not exporting specialization of an exported function template without
// explicit dllexport.
// MSC-DAG: define void @"\01??$exportedFuncTmpl@UExplicitSpec_NotExported@@@@YAXXZ"()
// GNU-DAG: define void @_Z16exportedFuncTmplI24ExplicitSpec_NotExportedEvv()
template<> void exportedFuncTmpl<ExplicitSpec_NotExported>() {}


// Export explicit instantiation declaration of a non-exported function template.
// MSC-DAG: define weak_odr dllexport void @"\01??$funcTmpl@UExplicitDecl_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z8funcTmplI21ExplicitDecl_ExportedEvv()
extern template __declspec(dllexport) void funcTmpl<ExplicitDecl_Exported>();
       template __declspec(dllexport) void funcTmpl<ExplicitDecl_Exported>();

// Export explicit instantiation definition of a non-exported function template.
// MSC-DAG: define weak_odr dllexport void @"\01??$funcTmpl@UExplicitInst_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z8funcTmplI21ExplicitInst_ExportedEvv()
template __declspec(dllexport) void funcTmpl<ExplicitInst_Exported>();

// Export specialization of a non-exported function template.
// MSC-DAG: define dllexport void @"\01??$funcTmpl@UExplicitSpec_Def_Exported@@@@YAXXZ"()
// GNU-DAG: define dllexport void @_Z8funcTmplI25ExplicitSpec_Def_ExportedEvv()
template<> __declspec(dllexport) void funcTmpl<ExplicitSpec_Def_Exported>() {}

// MSC-DAG: define weak_odr dllexport void @"\01??$funcTmpl@UExplicitSpec_InlineDef_Exported@@@@YAXXZ"()
// GNU-DAG: define weak_odr dllexport void @_Z8funcTmplI31ExplicitSpec_InlineDef_ExportedEvv()
template<> __declspec(dllexport) inline void funcTmpl<ExplicitSpec_InlineDef_Exported>() {}



//===----------------------------------------------------------------------===//
// Precedence
//===----------------------------------------------------------------------===//

// dllexport takes precedence over the dllimport if both are specified.
// MSC-DAG: @"\01?PrecedenceGlobal1A@@3HA" = dllexport global i32 0, align 4
// MSC-DAG: @"\01?PrecedenceGlobal1B@@3HA" = dllexport global i32 0, align 4
// GNU-DAG: @PrecedenceGlobal1A            = dllexport global i32 0, align 4
// GNU-DAG: @PrecedenceGlobal1B            = dllexport global i32 0, align 4
__attribute__((dllimport, dllexport))       int PrecedenceGlobal1A; // dllimport ignored
__declspec(dllimport) __declspec(dllexport) int PrecedenceGlobal1B; // dllimport ignored

// MSC-DAG: @"\01?PrecedenceGlobal2A@@3HA" = dllexport global i32 0, align 4
// MSC-DAG: @"\01?PrecedenceGlobal2B@@3HA" = dllexport global i32 0, align 4
// GNU-DAG: @PrecedenceGlobal2A            = dllexport global i32 0, align 4
// GNU-DAG: @PrecedenceGlobal2B            = dllexport global i32 0, align 4
__attribute__((dllexport, dllimport))       int PrecedenceGlobal2A; // dllimport ignored
__declspec(dllexport) __declspec(dllimport) int PrecedenceGlobal2B; // dllimport ignored

// MSC-DAG: @"\01?PrecedenceGlobalRedecl1@@3HA" = dllexport global i32 0, align 4
// GNU-DAG: @PrecedenceGlobalRedecl1            = dllexport global i32 0, align 4
__declspec(dllexport) extern int PrecedenceGlobalRedecl1;
__declspec(dllimport)        int PrecedenceGlobalRedecl1 = 0;

// MSC-DAG: @"\01?PrecedenceGlobalRedecl2@@3HA" = dllexport global i32 0, align 4
// GNU-DAG: @PrecedenceGlobalRedecl2            = dllexport global i32 0, align 4
__declspec(dllimport) extern int PrecedenceGlobalRedecl2;
__declspec(dllexport)        int PrecedenceGlobalRedecl2;

// MSC-DAG: @"\01?PrecedenceGlobalMixed1@@3HA" = dllexport global i32 0, align 4
// GNU-DAG: @PrecedenceGlobalMixed1            = dllexport global i32 0, align 4
__attribute__((dllexport)) extern int PrecedenceGlobalMixed1;
__declspec(dllimport)             int PrecedenceGlobalMixed1 = 0;

// MSC-DAG: @"\01?PrecedenceGlobalMixed2@@3HA" = dllexport global i32 0, align 4
// GNU-DAG: @PrecedenceGlobalMixed2            = dllexport global i32 0, align 4
__attribute__((dllimport)) extern int PrecedenceGlobalMixed2;
__declspec(dllexport)             int PrecedenceGlobalMixed2;

// MSC-DAG: define dllexport void @"\01?precedence1A@@YAXXZ"
// MSC-DAG: define dllexport void @"\01?precedence1B@@YAXXZ"
// GNU-DAG: define dllexport void @_Z12precedence1Av()
// GNU-DAG: define dllexport void @_Z12precedence1Bv()
void __attribute__((dllimport, dllexport))       precedence1A() {}
void __declspec(dllimport) __declspec(dllexport) precedence1B() {}

// MSC-DAG: define dllexport void @"\01?precedence2A@@YAXXZ"
// MSC-DAG: define dllexport void @"\01?precedence2B@@YAXXZ"
// GNU-DAG: define dllexport void @_Z12precedence2Av()
// GNU-DAG: define dllexport void @_Z12precedence2Bv()
void __attribute__((dllexport, dllimport))       precedence2A() {}
void __declspec(dllexport) __declspec(dllimport) precedence2B() {}

// MSC-DAG: define dllexport void @"\01?precedenceRedecl1@@YAXXZ"
// GNU-DAG: define dllexport void @_Z17precedenceRedecl1v()
void __declspec(dllimport) precedenceRedecl1();
void __declspec(dllexport) precedenceRedecl1() {}

// MSC-DAG: define dllexport void @"\01?precedenceRedecl2@@YAXXZ"
// GNU-DAG: define dllexport void @_Z17precedenceRedecl2v()
void __declspec(dllexport) precedenceRedecl2();
void __declspec(dllimport) precedenceRedecl2() {}



//===----------------------------------------------------------------------===//
// Classes
//===----------------------------------------------------------------------===//

struct S {
  void __declspec(dllexport) a() {}
  // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?a@S@@QAEXXZ"

  struct T {
    void __declspec(dllexport) a() {}
    // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?a@T@S@@QAEXXZ"
  };
};


struct __declspec(dllexport) T {
  // Copy assignment operator:
  // M32-DAG: define weak_odr dllexport x86_thiscallcc nonnull %struct.T* @"\01??4T@@QAEAAU0@ABU0@@Z"

  // Explicitly defaulted copy constructur:
  T(const T&) = default;
  // M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.T* @"\01??0T@@QAE@ABU0@@Z"

  void a() {}
  // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?a@T@@QAEXXZ"

  static int b;
  // M32-DAG: @"\01?b@T@@2HA" = external dllexport global i32

  static int c;
  // M32-DAG: @"\01?c@T@@2HA" = dllexport global i32 0, align 4
};

USEVAR(T::b)
int T::c;

template <typename T> struct __declspec(dllexport) U { void foo() {} };
// The U<int> specialization below must cause the following to be emitted:
// M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?foo@?$U@H@@QAEXXZ"
// M32-DAG: define weak_odr dllexport x86_thiscallcc nonnull %struct.U* @"\01??4?$U@H@@QAEAAU0@ABU0@@Z"
struct __declspec(dllexport) V : public U<int> { };


struct __declspec(dllexport) W { virtual void foo() {} };
// Default ctor:
// M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.W* @"\01??0W@@QAE@XZ"
// Copy ctor:
// M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.W* @"\01??0W@@QAE@ABU0@@Z"
// vftable:
// M32-DAG: [[W_VTABLE:@.*]] = private unnamed_addr constant [2 x i8*] [i8* bitcast (%MSRTTICompleteObjectLocator* @"\01??_R4W@@6B@" to i8*), i8* bitcast (void (%struct.W*)* @"\01?foo@W@@UAEXXZ" to i8*)], comdat $"\01??_7W@@6B@"
// M32-DAG: @"\01??_7W@@6B@" = dllexport unnamed_addr alias getelementptr inbounds ([2 x i8*]* [[W_VTABLE]], i32 0, i32 1), comdat $"\01??_7W@@6B@"
// G32-DAG: @_ZTV1W = weak_odr dllexport unnamed_addr constant [3 x i8*] [i8* null, i8* bitcast ({ i8*, i8* }* @_ZTI1W to i8*), i8* bitcast (void (%struct.W*)* @_ZN1W3fooEv to i8*)]

struct __declspec(dllexport) X : public virtual W {};
// vbtable:
// M32-DAG: @"\01??_8X@@7B@" = weak_odr dllexport unnamed_addr constant [2 x i32] [i32 0, i32 4]

struct __declspec(dllexport) Y {
  // Move assignment operator:
  // M32-DAG: define weak_odr dllexport x86_thiscallcc nonnull %struct.Y* @"\01??4Y@@QAEAAU0@$$QAU0@@Z"

  int x;
};

struct __declspec(dllexport) Z { virtual ~Z() {} };
// The scalar deleting dtor does not get exported:
// M32-DAG: define linkonce_odr x86_thiscallcc void @"\01??_GZ@@UAEPAXI@Z"


// The user-defined dtor does get exported:
// M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01??1Z@@UAE@XZ"

namespace DontUseDtorAlias {
  struct __declspec(dllexport) A { ~A(); };
  struct __declspec(dllexport) B : A { ~B(); };
  A::~A() { }
  B::~B() { }
  // Emit a real definition of B's constructor; don't alias it to A's.
  // M32-DAG: define dllexport x86_thiscallcc void @"\01??1B@DontUseDtorAlias@@QAE@XZ"
}

struct __declspec(dllexport) DefaultedCtorsDtors {
  DefaultedCtorsDtors() = default;
  // M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.DefaultedCtorsDtors* @"\01??0DefaultedCtorsDtors@@QAE@XZ"
  ~DefaultedCtorsDtors() = default;
  // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01??1DefaultedCtorsDtors@@QAE@XZ"
};

namespace ReferencedInlineMethodInNestedClass {
  struct __declspec(dllexport) S {
    void foo() {
      t->bar();
    }
    struct T {
      void bar() {}
    };
    T *t;
  };
  // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?foo@S@ReferencedInlineMethodInNestedClass@@QAEXXZ"
  // M32-DAG: define linkonce_odr x86_thiscallcc void @"\01?bar@T@S@ReferencedInlineMethodInNestedClass@@QAEXXZ"
}

// MS ignores DLL attributes on partial specializations.
template <typename T> struct PartiallySpecializedClassTemplate {};
template <typename T> struct __declspec(dllexport) PartiallySpecializedClassTemplate<T*> { void f() {} };
USEMEMFUNC(PartiallySpecializedClassTemplate<void*>, f);
// M32-DAG: define linkonce_odr x86_thiscallcc void @"\01?f@?$PartiallySpecializedClassTemplate@PAX@@QAEXXZ"
// G32-DAG: define weak_odr dllexport x86_thiscallcc void @_ZN33PartiallySpecializedClassTemplateIPvE1fEv

template <typename T> struct ExplicitlySpecializedClassTemplate {};
template <> struct __declspec(dllexport) ExplicitlySpecializedClassTemplate<void*> { void f() {} };
USEMEMFUNC(ExplicitlySpecializedClassTemplate<void*>, f);
// M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?f@?$ExplicitlySpecializedClassTemplate@PAX@@QAEXXZ"
// G32-DAG: define weak_odr dllexport x86_thiscallcc void @_ZN34ExplicitlySpecializedClassTemplateIPvE1fEv

//===----------------------------------------------------------------------===//
// Classes with template base classes
//===----------------------------------------------------------------------===//

template <typename T> struct ClassTemplate { void func() {} };
template <typename T> struct __declspec(dllexport) ExportedClassTemplate { void func() {} };
template <typename T> struct __declspec(dllimport) ImportedClassTemplate { void func() {} };

template <typename T> struct ExplicitlySpecializedTemplate { void func() {} };
template <> struct ExplicitlySpecializedTemplate<int> { void func() {} };
template <typename T> struct ExplicitlyExportSpecializedTemplate { void func() {} };
template <> struct __declspec(dllexport) ExplicitlyExportSpecializedTemplate<int> { void func() {} };
template <typename T> struct ExplicitlyImportSpecializedTemplate { void func() {} };
template <> struct __declspec(dllimport) ExplicitlyImportSpecializedTemplate<int> { void func() {} };

template <typename T> struct ExplicitlyInstantiatedTemplate { void func() {} };
template struct ExplicitlyInstantiatedTemplate<int>;
template <typename T> struct ExplicitlyExportInstantiatedTemplate { void func() {} };
template struct __declspec(dllexport) ExplicitlyExportInstantiatedTemplate<int>;
template <typename T> struct ExplicitlyImportInstantiatedTemplate { void func() {} };
template struct __declspec(dllimport) ExplicitlyImportInstantiatedTemplate<int>;


// MS: ClassTemplate<int> gets exported.
struct __declspec(dllexport) DerivedFromTemplate : public ClassTemplate<int> {};
USEMEMFUNC(ClassTemplate<int>, func)
// M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?func@?$ClassTemplate@H@@QAEXXZ"
// G32-DAG: define linkonce_odr x86_thiscallcc void @_ZN13ClassTemplateIiE4funcEv

// ExportedTemplate is explicitly exported.
struct __declspec(dllexport) DerivedFromExportedTemplate : public ExportedClassTemplate<int> {};
// M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?func@?$ExportedClassTemplate@H@@QAEXXZ"
// G32-DAG: define weak_odr dllexport x86_thiscallcc void @_ZN21ExportedClassTemplateIiE4funcEv

// ImportedClassTemplate is explicitly imported.
struct __declspec(dllexport) DerivedFromImportedTemplate : public ImportedClassTemplate<int> {};
USEMEMFUNC(ImportedClassTemplate<int>, func)
// M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"\01?func@?$ImportedClassTemplate@H@@QAEXXZ"
// G32-DAG: declare dllimport x86_thiscallcc void @_ZN21ImportedClassTemplateIiE4funcEv

// Base class already instantiated without dll attribute.
struct DerivedFromTemplateD : public ClassTemplate<double> {};
struct __declspec(dllexport) DerivedFromTemplateD2 : public ClassTemplate<double> {};
USEMEMFUNC(ClassTemplate<double>, func)
// M32-DAG: define linkonce_odr x86_thiscallcc void @"\01?func@?$ClassTemplate@N@@QAEXXZ"
// G32-DAG: define linkonce_odr x86_thiscallcc void @_ZN13ClassTemplateIdE4funcEv

// MS: Base class already instantiated with different dll attribute.
struct __declspec(dllimport) DerivedFromTemplateB : public ClassTemplate<bool> {};
struct __declspec(dllexport) DerivedFromTemplateB2 : public ClassTemplate<bool> {};
USEMEMFUNC(ClassTemplate<bool>, func)
// M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"\01?func@?$ClassTemplate@_N@@QAEXXZ"
// G32-DAG: define linkonce_odr x86_thiscallcc void @_ZN13ClassTemplateIbE4funcEv

// Base class already specialized without dll attribute.
struct __declspec(dllexport) DerivedFromExplicitlySpecializedTemplate : public ExplicitlySpecializedTemplate<int> {};
USEMEMFUNC(ExplicitlySpecializedTemplate<int>, func)
// M32-DAG: define linkonce_odr x86_thiscallcc void @"\01?func@?$ExplicitlySpecializedTemplate@H@@QAEXXZ"
// G32-DAG: define linkonce_odr x86_thiscallcc void @_ZN29ExplicitlySpecializedTemplateIiE4funcEv

// Base class alredy specialized with export attribute.
struct __declspec(dllexport) DerivedFromExplicitlyExportSpecializedTemplate : public ExplicitlyExportSpecializedTemplate<int> {};
USEMEMFUNC(ExplicitlyExportSpecializedTemplate<int>, func)
// M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?func@?$ExplicitlyExportSpecializedTemplate@H@@QAEXXZ"
// G32-DAG: define weak_odr dllexport x86_thiscallcc void @_ZN35ExplicitlyExportSpecializedTemplateIiE4funcEv

// Base class already specialized with import attribute.
struct __declspec(dllexport) DerivedFromExplicitlyImportSpecializedTemplate : public ExplicitlyImportSpecializedTemplate<int> {};
USEMEMFUNC(ExplicitlyImportSpecializedTemplate<int>, func)
// M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"\01?func@?$ExplicitlyImportSpecializedTemplate@H@@QAEXXZ"
// G32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @_ZN35ExplicitlyImportSpecializedTemplateIiE4funcEv

// Base class already instantiated without dll attribute.
struct __declspec(dllexport) DerivedFromExplicitlyInstantiatedTemplate : public ExplicitlyInstantiatedTemplate<int> {};
USEMEMFUNC(ExplicitlyInstantiatedTemplate<int>, func)
// M32-DAG: define weak_odr x86_thiscallcc void @"\01?func@?$ExplicitlyInstantiatedTemplate@H@@QAEXXZ"
// G32-DAG: define weak_odr x86_thiscallcc void @_ZN30ExplicitlyInstantiatedTemplateIiE4funcEv

// Base class already instantiated with export attribute.
struct __declspec(dllexport) DerivedFromExplicitlyExportInstantiatedTemplate : public ExplicitlyExportInstantiatedTemplate<int> {};
USEMEMFUNC(ExplicitlyExportInstantiatedTemplate<int>, func)
// M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?func@?$ExplicitlyExportInstantiatedTemplate@H@@QAEXXZ"
// G32-DAG: define weak_odr dllexport x86_thiscallcc void @_ZN36ExplicitlyExportInstantiatedTemplateIiE4funcEv

// Base class already instantiated with import attribute.
struct __declspec(dllexport) DerivedFromExplicitlyImportInstantiatedTemplate : public ExplicitlyImportInstantiatedTemplate<int> {};
USEMEMFUNC(ExplicitlyImportInstantiatedTemplate<int>, func)
// M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"\01?func@?$ExplicitlyImportInstantiatedTemplate@H@@QAEXXZ"
// G32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @_ZN36ExplicitlyImportInstantiatedTemplateIiE4funcEv

// MS: A dll attribute propagates through multiple levels of instantiation.
template <typename T> struct TopClass { void func() {} };
template <typename T> struct MiddleClass : public TopClass<T> { };
struct __declspec(dllexport) BottomClas : public MiddleClass<int> { };
USEMEMFUNC(TopClass<int>, func)
// M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?func@?$TopClass@H@@QAEXXZ"
// G32-DAG: define linkonce_odr x86_thiscallcc void @_ZN8TopClassIiE4funcEv