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[MSCV][dllexport/dllimport][PS] Allow UniqueExternal linkage classes with dllexport/dllimport

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MSVC allows instantiations of exported or imported template classes with template
parameters that have internal linkage. Clang now allows it in Microsoft mode and for
the Playstation platform. This partially addresses issue 56068.

Note that MSVC also allows explicit dllexport/dllimport attributes on classes
with internal linkage (e.g. local classes or classes declared in anonymous name spaces).
Clang continues to reject such declarations.

Reviewed By: hans

Differential Revision: https://reviews.llvm.org/D146338
This commit is contained in:
Wolfgang Pieb 2023-03-13 17:45:20 +00:00
parent da9f890d09
commit 477f9cea77
5 changed files with 165 additions and 54 deletions
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12
clang/lib/Sema/SemaDeclCXX.cpp
View File

@ -6351,6 +6351,18 @@ void Sema::checkClassLevelDLLAttribute(CXXRecordDecl *Class) {
if (!ClassAttr)
return;
// MSVC allows imported or exported template classes that have UniqueExternal
// linkage. This occurs when the template class has been instantiated with
// a template parameter which itself has internal linkage.
// We drop the attribute to avoid exporting or importing any members.
if ((Context.getTargetInfo().getCXXABI().isMicrosoft() ||
Context.getTargetInfo().getTriple().isPS()) &&
(!Class->isExternallyVisible() && Class->hasExternalFormalLinkage())) {
Class->dropAttr<DLLExportAttr>();
Class->dropAttr<DLLImportAttr>();
return;
}
if (!Class->isExternallyVisible()) {
Diag(Class->getLocation(), diag::err_attribute_dll_not_extern)
<< Class << ClassAttr;

34
clang/test/CodeGenCXX/dllexport-unique-external.cpp Normal file
View File

@ -0,0 +1,34 @@
// RUN: %clang_cc1 -no-enable-noundef-analysis -triple i686-windows-msvc -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O0 -disable-llvm-passes -o - %s | FileCheck --check-prefix=MSC %s
// RUN: %clang_cc1 -no-enable-noundef-analysis -triple x86_64-scei-ps4 -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O0 -o - %s | FileCheck --check-prefix=PS %s
// RUN: %clang_cc1 -no-enable-noundef-analysis -triple x86_64-sie-ps5 -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O0 -o - %s | FileCheck --check-prefix=PS %s
template <typename T> struct __declspec(dllexport) ExportedClassTemplate { void func(); };
// Make sure that we do not export classes with unique external linkage.
// Note that MSVC does indeed export the symbols in the MSC check string.
void func1() {
class LocalCRTP : public ExportedClassTemplate<LocalCRTP> {};
LocalCRTP lc;
lc.func();
}
namespace {
class AnonNSCRTP : public ExportedClassTemplate<AnonNSCRTP> {};
AnonNSCRTP ac;
}
void func2() {
ac.func();
}
// MSC-NOT: declare {{.*}}dllexport
// MSC: call {{.*}}@"?func@?$ExportedClassTemplate@VLocalCRTP@?1??func1@@{{.*}}"
// MSC-NOT: declare {{.*}}dllexport
// MSC: call {{.*}}@"?func@?$ExportedClassTemplate@VAnonNSCRTP@?{{.*}}"
// MSC-NOT: declare {{.*}}dllexport
// PS-NOT: declare {{.*}}dllexport
// PS: call {{.*}}@_ZN21ExportedClassTemplateIZ5func1vE9LocalCRTPE4funcEv
// PS-NOT: declare {{.*}}dllexport
// PS: call {{.*}}@_ZN21ExportedClassTemplateIN12_GLOBAL__N_110AnonNSCRTPEE4funcEv
// PS-NOT: declare {{.*}}dllexport

34
clang/test/CodeGenCXX/dllimport-unique-external.cpp Normal file
View File

@ -0,0 +1,34 @@
// RUN: %clang_cc1 -no-enable-noundef-analysis -triple i686-windows-msvc -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O0 -disable-llvm-passes -o - %s | FileCheck --check-prefix=MSC %s
// RUN: %clang_cc1 -no-enable-noundef-analysis -triple x86_64-scei-ps4 -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O0 -o - %s | FileCheck --check-prefix=PS %s
// RUN: %clang_cc1 -no-enable-noundef-analysis -triple x86_64-sie-ps5 -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O0 -o - %s | FileCheck --check-prefix=PS %s
template <typename T> struct __declspec(dllimport) ImportedClassTemplate { void func(); };
// Make sure that we do not import classes with unique external linkage.
// Note that MSVC does indeed expect the called function to be defined elsewhere.
void func1() {
class LocalCRTP : public ImportedClassTemplate<LocalCRTP> {};
LocalCRTP lc;
lc.func();
}
namespace {
class AnonNSCRTP : public ImportedClassTemplate<AnonNSCRTP> {};
AnonNSCRTP ac;
}
void func2() {
ac.func();
}
// MSC-NOT: declare {{.*}}dllimport
// MSC: call {{.*}}@"?func@?$ImportedClassTemplate@VLocalCRTP@?1??func1{{.*}}"
// MSC-NOT: declare {{.*}}dllimport
// MSC: call {{.*}}@"?func@?$ImportedClassTemplate@VAnonNSCRTP@?{{.*}}"
// MSC-NOT: declare {{.*}}dllimport
// PS-NOT: declare {{.*}}dllimport
// PS: call {{.*}}@_ZN21ImportedClassTemplateIZ5func1vE9LocalCRTPE4funcEv
// PS-NOT: declare {{.*}}dllimport
// PS: call {{.*}}@_ZN21ImportedClassTemplateIN12_GLOBAL__N_110AnonNSCRTPEE4funcEv
// PS-NOT: declare {{.*}}dllimport

33
clang/test/SemaCXX/dllexport.cpp
View File

@ -4,8 +4,8 @@
// RUN: %clang_cc1 -triple x86_64-mingw32 -fsyntax-only -fms-extensions -verify -std=c++11 -Wunsupported-dll-base-class-template -DGNU %s
// RUN: %clang_cc1 -triple i686-windows-itanium -fsyntax-only -fms-extensions -verify -std=c++11 -Wunsupported-dll-base-class-template -DWI %s
// RUN: %clang_cc1 -triple x86_64-windows-itanium -fsyntax-only -fms-extensions -verify -std=c++1y -Wunsupported-dll-base-class-template -DWI %s
// RUN: %clang_cc1 -triple x86_64-scei-ps4 -fsyntax-only -fdeclspec -verify -std=c++11 -Wunsupported-dll-base-class-template -DWI -DPS %s
// RUN: %clang_cc1 -triple x86_64-sie-ps5 -fsyntax-only -fdeclspec -verify -std=c++1y -Wunsupported-dll-base-class-template -DWI -DPS %s
// RUN: %clang_cc1 -triple x86_64-scei-ps4 -fsyntax-only -fdeclspec -verify -std=c++11 -Wunsupported-dll-base-class-template -DPS %s
// RUN: %clang_cc1 -triple x86_64-sie-ps5 -fsyntax-only -fdeclspec -verify -std=c++1y -Wunsupported-dll-base-class-template -DPS %s
// Helper structs to make templates more expressive.
struct ImplicitInst_Exported {};
@ -353,7 +353,7 @@ class __declspec(dllexport) ClassDecl;
class __declspec(dllexport) ClassDef {};
#if defined(MS) || defined (WI)
#if defined(MS) || defined (WI) || defined(PS)
// expected-warning@+3{{'dllexport' attribute ignored}}
#endif
template <typename T> struct PartiallySpecializedClassTemplate {};
@ -371,13 +371,13 @@ ImplicitlyInstantiatedExportedTemplate<IncompleteType> implicitlyInstantiatedExp
// Don't instantiate class members of templates with explicit instantiation declarations, even if they are exported.
struct IncompleteType2;
#if defined(MS) || defined (WI)
#if defined(MS) || defined (WI) || defined(PS)
// expected-note@+2{{attribute is here}}
#endif
template <typename T> struct __declspec(dllexport) ExportedTemplateWithExplicitInstantiationDecl {
int f() { return sizeof(T); } // no-error
};
#if defined(MS) || defined (WI)
#if defined(MS) || defined (WI) || defined(PS)
// expected-warning@+2{{explicit instantiation declaration should not be 'dllexport'}}
#endif
extern template struct ExportedTemplateWithExplicitInstantiationDecl<IncompleteType2>;
@ -412,13 +412,13 @@ struct __declspec(dllexport) ExportedBaseClass2 : public ExportedBaseClassTempla
// Warn about explicit instantiation declarations of dllexport classes.
template <typename T> struct ExplicitInstantiationDeclTemplate {};
#if defined(MS) || defined (WI)
#if defined(MS) || defined (WI) || defined(PS)
// expected-warning@+2{{explicit instantiation declaration should not be 'dllexport'}} expected-note@+2{{attribute is here}}
#endif
extern template struct __declspec(dllexport) ExplicitInstantiationDeclTemplate<int>;
template <typename T> struct __declspec(dllexport) ExplicitInstantiationDeclExportedTemplate {};
#if defined(MS) || defined (WI)
#if defined(MS) || defined (WI) || defined(PS)
// expected-note@-2{{attribute is here}}
// expected-warning@+2{{explicit instantiation declaration should not be 'dllexport'}}
#endif
@ -434,7 +434,13 @@ void PR23308::f(InternalLinkageType*) {} // No error; we don't try to export f b
// Classes with template base classes
//===----------------------------------------------------------------------===//
class __declspec(dllexport) ExportedClass {};
class __declspec(dllimport) ImportedClass {};
template <typename T> class ClassTemplate {};
#if not defined(MS) && not defined(PS)
// expected-error@+2{{'ExportedClassTemplate<LocalCRTP>' must have external linkage when declared 'dllexport'}}
#endif
template <typename T> class __declspec(dllexport) ExportedClassTemplate {};
template <typename T> class __declspec(dllimport) ImportedClassTemplate {};
@ -457,7 +463,7 @@ template <typename T> struct ExplicitlyExportInstantiatedTemplate { void func()
template struct __declspec(dllexport) ExplicitlyExportInstantiatedTemplate<int>;
template <typename T> struct ExplicitlyExportDeclaredInstantiatedTemplate { void func() {} };
extern template struct ExplicitlyExportDeclaredInstantiatedTemplate<int>;
#if not defined(MS) && not defined (WI)
#if not defined(MS) && not defined (WI) && not defined(PS)
// expected-warning@+2{{'dllexport' attribute ignored on explicit instantiation definition}}
#endif
template struct __declspec(dllexport) ExplicitlyExportDeclaredInstantiatedTemplate<int>;
@ -516,6 +522,15 @@ template <typename T> struct ExplicitInstantiationDeclTemplateBase { void func()
extern template struct ExplicitInstantiationDeclTemplateBase<int>;
struct __declspec(dllexport) DerivedFromExplicitInstantiationDeclTemplateBase : public ExplicitInstantiationDeclTemplateBase<int> {};
void func() {
// MSVC allows deriving from exported template classes in local contexts.
class LocalDerivedFromExportedClass : public ExportedClass {};
class LocalDerivedFromExportedTemplate : public ExportedClassTemplate<int> {};
#if not defined(MS) && not defined (PS)
// expected-note@+2{{in instantiation of template class 'ExportedClassTemplate<LocalCRTP>' requested here}}
#endif
class LocalCRTP : public ExportedClassTemplate<LocalCRTP> {};
}
//===----------------------------------------------------------------------===//
// Precedence
@ -1180,7 +1195,7 @@ template<typename T> template<typename U> __declspec(dllexport) constexpr int CT
// Lambdas
//===----------------------------------------------------------------------===//
// The MS ABI doesn't provide a stable mangling for lambdas, so they can't be imported or exported.
#if defined(MS) || defined (WI)
#if defined(MS) || defined (WI) || defined(PS)
// expected-error@+2{{lambda cannot be declared 'dllexport'}}
#endif
auto Lambda = []() __declspec(dllexport) -> bool { return true; };

106
clang/test/SemaCXX/dllimport.cpp
View File

@ -5,9 +5,9 @@
// RUN: %clang_cc1 -triple x86_64-mingw32 -fsyntax-only -fms-extensions -verify -std=c++17 -Wunsupported-dll-base-class-template -DGNU %s
// RUN: %clang_cc1 -triple i686-windows-itanium -fsyntax-only -fms-extensions -verify -std=c++11 -Wunsupported-dll-base-class-template -DWI %s
// RUN: %clang_cc1 -triple x86_64-windows-itanium -fsyntax-only -fms-extensions -verify -std=c++17 -Wunsupported-dll-base-class-template -DWI %s
// RUN: %clang_cc1 -triple x86_64-scei-ps4 -fsyntax-only -fdeclspec -verify -std=c++11 -Wunsupported-dll-base-class-template -DWI -DPS %s
// RUN: %clang_cc1 -triple x86_64-scei-ps4 -fsyntax-only -fdeclspec -verify -std=c++17 -Wunsupported-dll-base-class-template -DWI -DPS %s
// RUN: %clang_cc1 -triple x86_64-sie-ps5 -fsyntax-only -fdeclspec -verify -std=c++17 -Wunsupported-dll-base-class-template -DWI -DPS %s
// RUN: %clang_cc1 -triple x86_64-scei-ps4 -fsyntax-only -fdeclspec -verify -std=c++11 -Wunsupported-dll-base-class-template -DPS %s
// RUN: %clang_cc1 -triple x86_64-scei-ps4 -fsyntax-only -fdeclspec -verify -std=c++17 -Wunsupported-dll-base-class-template -DPS %s
// RUN: %clang_cc1 -triple x86_64-sie-ps5 -fsyntax-only -fdeclspec -verify -std=c++17 -Wunsupported-dll-base-class-template -DPS %s
// Helper structs to make templates more expressive.
struct ImplicitInst_Imported {};
@ -60,7 +60,7 @@ int __declspec(dllimport) GlobalInit2 = 1; // expected-error{{definition of dlli
// expected-note@+2{{previous attribute is here}}
#endif
__declspec(dllimport) extern int ExternGlobalDeclInit; // expected-note{{previous declaration is here}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+4{{'ExternGlobalDeclInit' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+2{{'ExternGlobalDeclInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
@ -71,7 +71,7 @@ int ExternGlobalDeclInit = 1;
// expected-note@+2{{previous attribute is here}}
#endif
__declspec(dllimport) int GlobalDeclInit; // expected-note{{previous declaration is here}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+4{{'GlobalDeclInit' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+2{{'GlobalDeclInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
@ -82,7 +82,7 @@ int GlobalDeclInit = 1;
// expected-note@+2{{previous attribute is here}}
#endif
int *__attribute__((dllimport)) GlobalDeclChunkAttrInit; // expected-note{{previous declaration is here}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+4{{'GlobalDeclChunkAttrInit' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+2{{'GlobalDeclChunkAttrInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
@ -93,7 +93,7 @@ int *GlobalDeclChunkAttrInit = 0;
// expected-note@+2{{previous attribute is here}}
#endif
int GlobalDeclAttrInit __attribute__((dllimport)); // expected-note{{previous declaration is here}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+4{{'GlobalDeclAttrInit' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+2{{'GlobalDeclAttrInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
@ -184,7 +184,7 @@ template<typename T> int __declspec(dllimport) VarTmplInit2 = 1; // expected-err
#endif
template <typename T>
__declspec(dllimport) extern int ExternVarTmplDeclInit; // expected-note{{previous declaration is here}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+5{{'ExternVarTmplDeclInit' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+3{{'ExternVarTmplDeclInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
@ -197,7 +197,7 @@ int ExternVarTmplDeclInit = 1;
#endif
template <typename T>
__declspec(dllimport) int VarTmplDeclInit; // expected-note{{previous declaration is here}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+5{{'VarTmplDeclInit' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+3{{'VarTmplDeclInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
@ -312,7 +312,7 @@ __declspec(dllimport) void redecl2(); // expected-note{{previous declaration is
#endif
__declspec(dllimport) void redecl3(); // expected-note{{previous declaration is here}}
// NB: Both MSVC and Clang issue a warning and make redecl3 dllexport.
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+4{{'redecl3' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+2{{'redecl3' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
@ -327,7 +327,7 @@ extern "C" {
__declspec(dllimport) void redecl5(); // expected-warning{{redeclaration of 'redecl5' should not add 'dllimport' attribute}}
}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
void redecl6(); // expected-note{{previous declaration is here}}
__declspec(dllimport) inline void redecl6() {} // expected-warning{{redeclaration of 'redecl6' should not add 'dllimport' attribute}}
#else
@ -344,21 +344,21 @@ struct FuncFriend {
#endif
friend __declspec(dllimport) void friend3(); // expected-note{{previous declaration is here}}
friend void friend4(); // expected-note{{previous declaration is here}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-note@+2{{previous declaration is here}}
#endif
friend void friend5();
};
__declspec(dllimport) void friend1();
void friend2(); // expected-warning{{'friend2' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+4{{'friend3' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+2{{'friend3' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
#endif
void friend3() {}
__declspec(dllimport) void friend4(); // expected-warning{{redeclaration of 'friend4' should not add 'dllimport' attribute}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
__declspec(dllimport) inline void friend5() {} // expected-warning{{redeclaration of 'friend5' should not add 'dllimport' attribute}}
#else
__declspec(dllimport) inline void friend5() {} // expected-warning{{'dllimport' attribute ignored on inline function}}
@ -386,7 +386,7 @@ namespace ns { __declspec(dllimport) void externalFunc(); }
// here which is irrelevant. But because the delete keyword is parsed later
// there is currently no straight-forward way to avoid this diagnostic.
__declspec(dllimport) void deletedFunc() = delete; // expected-error{{attribute 'dllimport' cannot be applied to a deleted function}} expected-error{{dllimport cannot be applied to non-inline function definition}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
__declspec(dllimport) inline void deletedInlineFunc() = delete; // expected-error{{attribute 'dllimport' cannot be applied to a deleted function}}
#else
__declspec(dllimport) inline void deletedInlineFunc() = delete; // expected-warning{{'dllimport' attribute ignored on inline function}}
@ -464,7 +464,7 @@ template<typename T> __declspec(dllimport) void funcTmplFriend1();
template<typename T> void funcTmplFriend2(); // expected-warning{{'funcTmplFriend2' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
template<typename T> void funcTmplFriend3() {} // expected-warning{{'funcTmplFriend3' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
template<typename T> __declspec(dllimport) void funcTmplFriend4(); // expected-error{{redeclaration of 'funcTmplFriend4' cannot add 'dllimport' attribute}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+2{{'funcTmplFriend5' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
#endif
template<typename T> inline void funcTmplFriend5() {}
@ -598,13 +598,13 @@ public:
__declspec(dllimport) constexpr static int ConstexprFieldDef = 1;
};
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+4{{'ImportMembers::Nested::normalDef' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+2{{'ImportMembers::Nested::normalDef' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
#endif
void ImportMembers::Nested::normalDef() {}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+4{{'ImportMembers::normalDef' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+2{{'ImportMembers::normalDef' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
@ -615,7 +615,7 @@ void ImportMembers::normalDef() {}
#endif
inline void ImportMembers::normalInlineDef() {}
void ImportMembers::normalInlineDecl() {}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+4{{'ImportMembers::virtualDef' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+2{{'ImportMembers::virtualDef' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
@ -626,7 +626,7 @@ inline void ImportMembers::normalInlineDef() {}
#endif
inline void ImportMembers::virtualInlineDef() {}
void ImportMembers::virtualInlineDecl() {}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+4{{'ImportMembers::staticDef' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+2{{'ImportMembers::staticDef' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
@ -699,7 +699,7 @@ struct ImportSpecials {
// Import deleted member functions.
struct ImportDeleted {
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
__declspec(dllimport) ImportDeleted() = delete; // expected-error{{attribute 'dllimport' cannot be applied to a deleted function}}
__declspec(dllimport) ~ImportDeleted() = delete; // expected-error{{attribute 'dllimport' cannot be applied to a deleted function}}
__declspec(dllimport) ImportDeleted(const ImportDeleted&) = delete; // expected-error{{attribute 'dllimport' cannot be applied to a deleted function}}
@ -772,7 +772,7 @@ struct ImportDefaultedDefs {
// Not allowed on definitions.
__declspec(dllimport) ImportDefaultedDefs::ImportDefaultedDefs() = default; // expected-error{{dllimport cannot be applied to non-inline function definition}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+5{{'ImportDefaultedDefs::~ImportDefaultedDefs' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+3{{'ImportDefaultedDefs::~ImportDefaultedDefs' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
@ -789,7 +789,7 @@ __declspec(dllimport) ImportDefaultedDefs::ImportDefaultedDefs(const ImportDefau
inline ImportDefaultedDefs& ImportDefaultedDefs::operator=(const ImportDefaultedDefs&) = default;
__declspec(dllimport) ImportDefaultedDefs::ImportDefaultedDefs(ImportDefaultedDefs&&) = default; // expected-error{{dllimport cannot be applied to non-inline function definition}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+4{{'ImportDefaultedDefs::operator=' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+2{{'ImportDefaultedDefs::operator=' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
@ -805,7 +805,7 @@ struct MemberRedecl {
static void staticDef(); // expected-note{{previous declaration is here}}
static inline void staticInlineDecl(); // expected-note{{previous declaration is here}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-note@+4{{previous declaration is here}}
// expected-note@+4{{previous declaration is here}}
// expected-note@+4{{previous declaration is here}}
@ -829,7 +829,7 @@ __declspec(dllimport) void MemberRedecl::staticDef() {} // expect
// expected-error@-1{{dllimport cannot be applied to non-inline function definition}}
__declspec(dllimport) void MemberRedecl::staticInlineDecl() {} // expected-error{{redeclaration of 'MemberRedecl::staticInlineDecl' cannot add 'dllimport' attribute}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
__declspec(dllimport) inline void MemberRedecl::normalInlineDef() {} // expected-error{{redeclaration of 'MemberRedecl::normalInlineDef' cannot add 'dllimport' attribute}}
__declspec(dllimport) inline void MemberRedecl::virtualInlineDef() {} // expected-error{{redeclaration of 'MemberRedecl::virtualInlineDef' cannot add 'dllimport' attribute}}
__declspec(dllimport) inline void MemberRedecl::staticInlineDef() {} // expected-error{{redeclaration of 'MemberRedecl::staticInlineDef' cannot add 'dllimport' attribute}}
@ -866,13 +866,13 @@ __declspec(dllimport) constexpr int MemberRedecl::ConstexprField;
struct ImportMemberTmpl {
template<typename T> __declspec(dllimport) void normalDecl();
template<typename T> __declspec(dllimport) void normalDef(); // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-note@+2{{previous declaration is here}} expected-note@+2{{previous attribute is here}}
#endif
template<typename T> __declspec(dllimport) void normalInlineDef();
template<typename T> __declspec(dllimport) static void staticDecl();
template<typename T> __declspec(dllimport) static void staticDef(); // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-note@+2{{previous declaration is here}} expected-note@+2{{previous attribute is here}}
#endif
template<typename T> __declspec(dllimport) static void staticInlineDef();
@ -935,7 +935,7 @@ struct MemTmplRedecl {
template<typename T> static void staticDef(); // expected-note{{previous declaration is here}}
template<typename T> static inline void staticInlineDecl(); // expected-note{{previous declaration is here}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-note@+3{{previous declaration is here}}
// expected-note@+3{{previous declaration is here}}
#endif
@ -953,7 +953,7 @@ struct MemTmplRedecl {
template<typename T> __declspec(dllimport) void MemTmplRedecl::normalDef() {} // expected-error{{redeclaration of 'MemTmplRedecl::normalDef' cannot add 'dllimport' attribute}}
// expected-error@-1{{dllimport cannot be applied to non-inline function definition}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
template<typename T> __declspec(dllimport) inline void MemTmplRedecl::normalInlineDef() {} // expected-error{{redeclaration of 'MemTmplRedecl::normalInlineDef' cannot add 'dllimport' attribute}}
#else
template<typename T> __declspec(dllimport) inline void MemTmplRedecl::normalInlineDef() {} // expected-warning{{'dllimport' attribute ignored on inline function}}
@ -961,7 +961,7 @@ template<typename T> __declspec(dllimport) inline void MemTmplRedecl::normalInli
template<typename T> __declspec(dllimport) void MemTmplRedecl::normalInlineDecl() {} // expected-error{{redeclaration of 'MemTmplRedecl::normalInlineDecl' cannot add 'dllimport' attribute}}
template<typename T> __declspec(dllimport) void MemTmplRedecl::staticDef() {} // expected-error{{redeclaration of 'MemTmplRedecl::staticDef' cannot add 'dllimport' attribute}}
// expected-error@-1{{dllimport cannot be applied to non-inline function definition}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
template<typename T> __declspec(dllimport) inline void MemTmplRedecl::staticInlineDef() {} // expected-error{{redeclaration of 'MemTmplRedecl::staticInlineDef' cannot add 'dllimport' attribute}}
#else
template<typename T> __declspec(dllimport) inline void MemTmplRedecl::staticInlineDef() {} // expected-warning{{'dllimport' attribute ignored on inline function}}
@ -1197,7 +1197,7 @@ public:
// NB: MSVC is inconsistent here and disallows *InlineDef on class templates,
// but allows it on classes. We allow both.
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+5{{'ImportClassTmplMembers::normalDef' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+3{{'ImportClassTmplMembers::normalDef' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
@ -1209,7 +1209,7 @@ void ImportClassTmplMembers<T>::normalDef() {}
#endif
template<typename T> inline void ImportClassTmplMembers<T>::normalInlineDef() {}
template<typename T> void ImportClassTmplMembers<T>::normalInlineDecl() {}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+5{{'ImportClassTmplMembers::virtualDef' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+3{{'ImportClassTmplMembers::virtualDef' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
@ -1221,7 +1221,7 @@ void ImportClassTmplMembers<T>::virtualDef() {}
#endif
template<typename T> inline void ImportClassTmplMembers<T>::virtualInlineDef() {}
template<typename T> void ImportClassTmplMembers<T>::virtualInlineDecl() {}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+5{{'ImportClassTmplMembers::staticDef' redeclared without 'dllimport' attribute: 'dllexport' attribute added}}
#else
// expected-warning@+3{{'ImportClassTmplMembers::staticDef' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
@ -1252,7 +1252,7 @@ struct CTMR /*ClassTmplMemberRedecl*/ {
static void staticDef(); // expected-note{{previous declaration is here}}
static inline void staticInlineDecl(); // expected-note{{previous declaration is here}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-note@+4{{previous declaration is here}}
// expected-note@+4{{previous declaration is here}}
// expected-note@+4{{previous declaration is here}}
@ -1276,7 +1276,7 @@ template<typename T> __declspec(dllimport) void CTMR<T>::staticDef() {}
// expected-error@-1{{dllimport cannot be applied to non-inline function definition}}
template<typename T> __declspec(dllimport) void CTMR<T>::staticInlineDecl() {} // expected-error{{redeclaration of 'CTMR::staticInlineDecl' cannot add 'dllimport' attribute}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
template<typename T> __declspec(dllimport) inline void CTMR<T>::normalInlineDef() {} // expected-error{{redeclaration of 'CTMR::normalInlineDef' cannot add 'dllimport' attribute}}
template<typename T> __declspec(dllimport) inline void CTMR<T>::virtualInlineDef() {} // expected-error{{redeclaration of 'CTMR::virtualInlineDef' cannot add 'dllimport' attribute}}
template<typename T> __declspec(dllimport) inline void CTMR<T>::staticInlineDef() {} // expected-error{{redeclaration of 'CTMR::staticInlineDef' cannot add 'dllimport' attribute}}
@ -1340,13 +1340,13 @@ template<typename T>
struct ImportClsTmplMemTmpl {
template<typename U> __declspec(dllimport) void normalDecl();
template<typename U> __declspec(dllimport) void normalDef(); // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-note@+2{{previous declaration is here}} expected-note@+2{{previous attribute is here}}
#endif
template<typename U> __declspec(dllimport) void normalInlineDef();
template<typename U> __declspec(dllimport) static void staticDecl();
template<typename U> __declspec(dllimport) static void staticDef(); // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-note@+2{{previous declaration is here}} expected-note@+2{{previous attribute is here}}
#endif
template<typename U> __declspec(dllimport) static void staticInlineDef();
@ -1358,12 +1358,12 @@ struct ImportClsTmplMemTmpl {
// expected-warning@+11{{'dllimport' attribute ignored on inline function}}
#endif
template<typename U> __declspec(dllimport) void normalInclass() {}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-note@+2{{previous declaration is here}} expected-note@+2{{previous attribute is here}}
#endif
template<typename U> __declspec(dllimport) inline void normalInlineDecl();
template<typename U> __declspec(dllimport) static void staticInclass() {}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-note@+2{{previous declaration is here}} expected-note@+2{{previous attribute is here}}
#endif
template<typename U> __declspec(dllimport) static inline void staticInlineDecl();
@ -1417,7 +1417,7 @@ struct CTMTR /*ClassTmplMemberTmplRedecl*/ {
template<typename U> static void staticDef(); // expected-note{{previous declaration is here}}
template<typename U> static inline void staticInlineDecl(); // expected-note{{previous declaration is here}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-note@+3{{previous declaration is here}}
// expected-note@+3{{previous declaration is here}}
#endif
@ -1440,7 +1440,7 @@ template<typename T> template<typename U> __declspec(dllimport) void CTMT
// expected-error@-1{{dllimport cannot be applied to non-inline function definition}}
template<typename T> template<typename U> __declspec(dllimport) void CTMTR<T>::staticInlineDecl() {} // expected-error{{redeclaration of 'CTMTR::staticInlineDecl' cannot add 'dllimport' attribute}}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
template<typename T> template<typename U> __declspec(dllimport) inline void CTMTR<T>::normalInlineDef() {} // expected-error{{redeclaration of 'CTMTR::normalInlineDef' cannot add 'dllimport' attribute}}
template<typename T> template<typename U> __declspec(dllimport) inline void CTMTR<T>::staticInlineDef() {} // expected-error{{redeclaration of 'CTMTR::staticInlineDef' cannot add 'dllimport' attribute}}
#else
@ -1477,7 +1477,7 @@ class __declspec(dllimport) ClassDef { };
template <typename T> class ClassTemplate {};
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-note@+5{{previous attribute is here}}
// expected-note@+4{{previous attribute is here}}
// expected-error@+4{{attribute 'dllexport' cannot be applied to member of 'dllimport' class}}
@ -1488,7 +1488,7 @@ class __declspec(dllimport) ImportClassWithDllMember {
void __declspec(dllimport) bar();
};
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-note@+5{{previous attribute is here}}
// expected-note@+4{{previous attribute is here}}
// expected-error@+4{{attribute 'dllimport' cannot be applied to member of 'dllexport' class}}
@ -1514,7 +1514,7 @@ template <typename> struct __declspec(dllimport) S {
S<int> s;
}
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-warning@+3{{'dllimport' attribute ignored}}
#endif
template <typename T> struct PartiallySpecializedClassTemplate {};
@ -1528,8 +1528,14 @@ template <> struct __declspec(dllimport) ExpliciallySpecializedClassTemplate<int
// Classes with template base classes
//===----------------------------------------------------------------------===//
class __declspec(dllexport) ExportedClass {};
class __declspec(dllimport) ImportedClass {};
template <typename T> class __declspec(dllexport) ExportedClassTemplate {};
#if !defined(MS) && !defined(PS)
// expected-error@+2{{'ImportedClassTemplate<LocalCRTP>' must have external linkage when declared 'dllimport'}}
#endif
template <typename T> class __declspec(dllimport) ImportedClassTemplate {};
// ClassTemplate<int> gets imported.
@ -1604,11 +1610,21 @@ template <typename T> struct ExplicitInstantiationDeclTemplateBase { void func()
extern template struct ExplicitInstantiationDeclTemplateBase<int>;
struct __declspec(dllimport) DerivedFromExplicitInstantiationDeclTemplateBase : public ExplicitInstantiationDeclTemplateBase<int> {};
void func() {
// MSVC propagates dllimport to derived classes even if they don't have external linkage.
class LocalDerivedFromImportedClass : public ImportedClass {};
class LocalDerivedFromImportedTemplate : public ImportedClassTemplate<int> {};
#if defined(GNU) || defined(WI)
// expected-note@+2{{in instantiation of template class 'ImportedClassTemplate<LocalCRTP>' requested here}}
#endif
class LocalCRTP : public ImportedClassTemplate<LocalCRTP> {};
}
//===----------------------------------------------------------------------===//
// Lambdas
//===----------------------------------------------------------------------===//
// The MS ABI doesn't provide a stable mangling for lambdas, so they can't be imported or exported.
#if defined(MS) || defined(WI)
#if defined(MS) || defined(WI) || defined(PS)
// expected-error@+4{{lambda cannot be declared 'dllimport'}}
#else
// expected-warning@+2{{'dllimport' attribute ignored on inline function}}