clang/test/CodeGenCXX/dllimport.cpp

   1 // RUN: %clang_cc1 -no-enable-noundef-analysis -triple i686-windows-msvc   -fno-rtti -fno-threadsafe-statics -fms-extensions -emit-llvm -std=c++1y -O0 -o - %s -DMSABI -w | FileCheck --check-prefix=MSC --check-prefix=M32 %s
   2 // RUN: %clang_cc1 -no-enable-noundef-analysis -triple x86_64-windows-msvc -fno-rtti -fno-threadsafe-statics -fms-extensions -emit-llvm -std=c++1y -O0 -o - %s -DMSABI -w | FileCheck --check-prefix=MSC --check-prefix=M64 %s
   3 // RUN: %clang_cc1 -no-enable-noundef-analysis -triple i686-windows-gnu    -fno-rtti -fno-threadsafe-statics -fms-extensions -emit-llvm -std=c++1y -O0 -o - %s         -w | FileCheck --check-prefix=GNU --check-prefix=G32 %s
   4 // RUN: %clang_cc1 -no-enable-noundef-analysis -triple x86_64-windows-gnu  -fno-rtti -fno-threadsafe-statics -fms-extensions -emit-llvm -std=c++1y -O0 -o - %s         -w | FileCheck --check-prefix=GNU %s
   5 // RUN: %clang_cc1 -no-enable-noundef-analysis -triple i686-windows-msvc   -fno-rtti -fno-threadsafe-statics -fms-extensions -fms-compatibility-version=18.00 -emit-llvm -std=c++1y -O1 -disable-llvm-passes -o - %s -DMSABI -w | FileCheck --check-prefix=MO1 --check-prefix=M18 %s
   6 // RUN: %clang_cc1 -no-enable-noundef-analysis -triple i686-windows-msvc   -fno-rtti -fno-threadsafe-statics -fms-extensions -fms-compatibility-version=19.00 -emit-llvm -std=c++1y -O1 -disable-llvm-passes -o - %s -DMSABI -w | FileCheck --check-prefix=MO1 --check-prefix=M19 %s
   7 // RUN: %clang_cc1 -no-enable-noundef-analysis -triple i686-windows-gnu    -fno-rtti -fno-threadsafe-statics -fms-extensions                                  -emit-llvm -std=c++1y -O1 -disable-llvm-passes -o - %s         -w | FileCheck --check-prefix=GO1 %s
   8
   9 // CHECK-NOT doesn't play nice with CHECK-DAG, so use separate run lines.
  10 // RUN: %clang_cc1 -no-enable-noundef-analysis -triple i686-windows-msvc   -fno-rtti -fno-threadsafe-statics -fms-extensions -emit-llvm -std=c++1y -O0 -o - %s -DMSABI -w | FileCheck --check-prefix=MSC2 %s
  11 // RUN: %clang_cc1 -no-enable-noundef-analysis -triple i686-windows-gnu    -fno-rtti -fno-threadsafe-statics -fms-extensions -emit-llvm -std=c++1y -O0 -o - %s         -w | FileCheck --check-prefix=GNU2 %s
  12
  13 // Helper structs to make templates more expressive.
  14 struct ImplicitInst_Imported {};
  15 struct ImplicitInst_NotImported {};
  16 struct ExplicitDecl_Imported {};
  17 struct ExplicitInst_Imported {};
  18 struct ExplicitSpec_Imported {};
  19 struct ExplicitSpec_Def_Imported {};
  20 struct ExplicitSpec_InlineDef_Imported {};
  21 struct ExplicitSpec_NotImported {};
  22
  23 #define JOIN2(x, y) x##y
  24 #define JOIN(x, y) JOIN2(x, y)
  25 #define UNIQ(name) JOIN(name, __LINE__)
  26 #define USEVARTYPE(type, var) type UNIQ(use)() { return var; }
  27 #define USEVAR(var) USEVARTYPE(int, var)
  28 #define USE(func) void UNIQ(use)() { func(); }
  29 #define USE1(func) void UNIQ(use)() { func(nullptr); }
  30 #define USEMEMFUNC(class, func) void (class::*UNIQ(use)())() { return &class::func; }
  31 #define USESTATICMEMFUNC(class, func) void (*UNIQ(use)())() { return &class::func; }
  32 #define USECLASS(class) void UNIQ(USE)() { class x; }
  33 #define USECOPYASSIGN(class) class& (class::*UNIQ(use)())(class&) { return &class::operator=; }
  34 #define USEMOVEASSIGN(class) class& (class::*UNIQ(use)())(class&&) { return &class::operator=; }
  35
  36 //===----------------------------------------------------------------------===//
  37 // Globals
  38 //===----------------------------------------------------------------------===//
  39
  40 // Import declaration.
  41 // MSC-DAG: @"?ExternGlobalDecl@@3HA" = external dllimport global i32
  42 // GNU-DAG: @ExternGlobalDecl            = external dllimport global i32
  43 __declspec(dllimport) extern int ExternGlobalDecl;
  44 USEVAR(ExternGlobalDecl)
  45
  46 // dllimport implies a declaration.
  47 // MSC-DAG: @"?GlobalDecl@@3HA" = external dllimport global i32
  48 // GNU-DAG: @GlobalDecl            = external dllimport global i32
  49 __declspec(dllimport) int GlobalDecl;
  50 USEVAR(GlobalDecl)
  51
  52 // Redeclarations
  53 // MSC-DAG: @"?GlobalRedecl1@@3HA" = external dllimport global i32
  54 // GNU-DAG: @GlobalRedecl1            = external dllimport global i32
  55 __declspec(dllimport) extern int GlobalRedecl1;
  56 __declspec(dllimport) extern int GlobalRedecl1;
  57 USEVAR(GlobalRedecl1)
  58
  59 // MSC-DAG: @"?GlobalRedecl2a@@3HA" = external dllimport global i32
  60 // GNU-DAG: @GlobalRedecl2a            = external dllimport global i32
  61 __declspec(dllimport) int GlobalRedecl2a;
  62 __declspec(dllimport) int GlobalRedecl2a;
  63 USEVAR(GlobalRedecl2a)
  64
  65 // M32-DAG: @"?GlobalRedecl2b@@3PAHA"   = external dllimport global ptr
  66 // M64-DAG: @"?GlobalRedecl2b@@3PEAHEA" = external dllimport global ptr
  67 // GNU-DAG: @GlobalRedecl2b                = external dllimport global ptr
  68 int *__attribute__((dllimport)) GlobalRedecl2b;
  69 int *__attribute__((dllimport)) GlobalRedecl2b;
  70 USEVARTYPE(int*, GlobalRedecl2b)
  71
  72 // MSC-DAG: @"?GlobalRedecl2c@@3HA" = external dllimport global i32
  73 // GNU-DAG: @GlobalRedecl2c            = external dllimport global i32
  74 int GlobalRedecl2c __attribute__((dllimport));
  75 int GlobalRedecl2c __attribute__((dllimport));
  76 USEVAR(GlobalRedecl2c)
  77
  78 // NB: MSC issues a warning and makes GlobalRedecl3 dllexport. We follow GCC
  79 // and drop the dllimport with a warning.
  80 // MSC-DAG: @"?GlobalRedecl3@@3HA" = external dso_local global i32
  81 // GNU-DAG: @GlobalRedecl3            = external global i32
  82 __declspec(dllimport) extern int GlobalRedecl3;
  83                       extern int GlobalRedecl3; // dllimport ignored
  84 USEVAR(GlobalRedecl3)
  85
  86 // MSC-DAG: @"?ExternalGlobal@ns@@3HA" = external dllimport global i32
  87 // GNU-DAG: @_ZN2ns14ExternalGlobalE      = external dllimport global i32
  88 namespace ns { __declspec(dllimport) int ExternalGlobal; }
  89 USEVAR(ns::ExternalGlobal)
  90
  91 int __declspec(dllimport) f();
  92 // MO1-DAG: @"?x@?1??inlineStaticLocalsFunc@@YAHXZ@4HA" = available_externally dllimport global i32 0
  93 // MO1-DAG: @"??_B?1??inlineStaticLocalsFunc@@YAHXZ@51" = available_externally dllimport global i32 0
  94 inline int __declspec(dllimport) inlineStaticLocalsFunc() {
  95   static int x = f();
  96   return x++;
  97 };
  98 USE(inlineStaticLocalsFunc);
  99
 100 // The address of a dllimport global cannot be used in constant initialization.
 101 // M32-DAG: @"?arr@?1??initializationFunc@@YAPAHXZ@4QBQAHB" = internal global [1 x ptr] zeroinitializer
 102 // GNU-DAG: @_ZZ18initializationFuncvE3arr = internal global [1 x ptr] zeroinitializer
 103 int *initializationFunc() {
 104   static int *const arr[] = {&ExternGlobalDecl};
 105   return arr[0];
 106 }
 107 USE(initializationFunc);
 108
 109
 110 //===----------------------------------------------------------------------===//
 111 // Variable templates
 112 //===----------------------------------------------------------------------===//
 113
 114 // Import declaration.
 115 // MSC-DAG: @"??$ExternVarTmplDecl@UImplicitInst_Imported@@@@3HA" = external dllimport global i32
 116 // GNU-DAG: @_Z17ExternVarTmplDeclI21ImplicitInst_ImportedE          = external dllimport global i32
 117 template<typename T> __declspec(dllimport) extern int ExternVarTmplDecl;
 118 USEVAR(ExternVarTmplDecl<ImplicitInst_Imported>)
 119
 120 // dllimport implies a declaration.
 121 // MSC-DAG: @"??$VarTmplDecl@UImplicitInst_Imported@@@@3HA" = external dllimport global i32
 122 // GNU-DAG: @_Z11VarTmplDeclI21ImplicitInst_ImportedE          = external dllimport global i32
 123 template<typename T> __declspec(dllimport) int VarTmplDecl;
 124 USEVAR(VarTmplDecl<ImplicitInst_Imported>)
 125
 126 // Redeclarations
 127 // MSC-DAG: @"??$VarTmplRedecl1@UImplicitInst_Imported@@@@3HA" = external dllimport global i32
 128 // GNU-DAG: @_Z14VarTmplRedecl1I21ImplicitInst_ImportedE          = external dllimport global i32
 129 template<typename T> __declspec(dllimport) extern int VarTmplRedecl1;
 130 template<typename T> __declspec(dllimport) extern int VarTmplRedecl1;
 131 USEVAR(VarTmplRedecl1<ImplicitInst_Imported>)
 132
 133 // MSC-DAG: @"??$VarTmplRedecl2@UImplicitInst_Imported@@@@3HA" = external dllimport global i32
 134 // GNU-DAG: @_Z14VarTmplRedecl2I21ImplicitInst_ImportedE          = external dllimport global i32
 135 template<typename T> __declspec(dllimport) int VarTmplRedecl2;
 136 template<typename T> __declspec(dllimport) int VarTmplRedecl2;
 137 USEVAR(VarTmplRedecl2<ImplicitInst_Imported>)
 138
 139 // MSC-DAG: @"??$VarTmplRedecl3@UImplicitInst_Imported@@@@3HA" = external dso_local global i32
 140 // GNU-DAG: @_Z14VarTmplRedecl3I21ImplicitInst_ImportedE          = external global i32
 141 template<typename T> __declspec(dllimport) extern int VarTmplRedecl3;
 142 template<typename T>                       extern int VarTmplRedecl3; // dllimport ignored
 143 USEVAR(VarTmplRedecl3<ImplicitInst_Imported>)
 144
 145
 146 // MSC-DAG: @"??$ExternalVarTmpl@UImplicitInst_Imported@@@ns@@3HA" = external dllimport global i32
 147 // GNU-DAG: @_ZN2ns15ExternalVarTmplI21ImplicitInst_ImportedEE        = external dllimport global i32
 148 namespace ns { template<typename T> __declspec(dllimport) int ExternalVarTmpl; }
 149 USEVAR(ns::ExternalVarTmpl<ImplicitInst_Imported>)
 150
 151
 152 template<typename T> int VarTmpl;
 153 template<typename T> __declspec(dllimport) int ImportedVarTmpl;
 154
 155 // Import implicit instantiation of an imported variable template.
 156 // MSC-DAG: @"??$ImportedVarTmpl@UImplicitInst_Imported@@@@3HA" = external dllimport global i32
 157 // GNU-DAG: @_Z15ImportedVarTmplI21ImplicitInst_ImportedE          = external dllimport global i32
 158 USEVAR(ImportedVarTmpl<ImplicitInst_Imported>)
 159
 160 // Import explicit instantiation declaration of an imported variable template.
 161 // MSC-DAG: @"??$ImportedVarTmpl@UExplicitDecl_Imported@@@@3HA" = external dllimport global i32
 162 // GNU-DAG: @_Z15ImportedVarTmplI21ExplicitDecl_ImportedE          = external dllimport global i32
 163 extern template int ImportedVarTmpl<ExplicitDecl_Imported>;
 164 USEVAR(ImportedVarTmpl<ExplicitDecl_Imported>)
 165
 166 // An explicit instantiation definition of an imported variable template cannot
 167 // be imported because the template must be defined which is illegal.
 168
 169 // Import specialization of an imported variable template.
 170 // MSC-DAG: @"??$ImportedVarTmpl@UExplicitSpec_Imported@@@@3HA" = external dllimport global i32
 171 // GNU-DAG: @_Z15ImportedVarTmplI21ExplicitSpec_ImportedE          = external dllimport global i32
 172 template<> __declspec(dllimport) int ImportedVarTmpl<ExplicitSpec_Imported>;
 173 USEVAR(ImportedVarTmpl<ExplicitSpec_Imported>)
 174
 175 // Not importing specialization of an imported variable template without
 176 // explicit dllimport.
 177 // MSC-DAG: @"??$ImportedVarTmpl@UExplicitSpec_NotImported@@@@3HA" = dso_local global i32 0, align 4
 178 // GNU-DAG: @_Z15ImportedVarTmplI24ExplicitSpec_NotImportedE          = dso_local global i32 0, align 4
 179 template<> int ImportedVarTmpl<ExplicitSpec_NotImported>;
 180 USEVAR(ImportedVarTmpl<ExplicitSpec_NotImported>)
 181
 182 // Import explicit instantiation declaration of a non-imported variable template.
 183 // MSC-DAG: @"??$VarTmpl@UExplicitDecl_Imported@@@@3HA" = external dllimport global i32
 184 // GNU-DAG: @_Z7VarTmplI21ExplicitDecl_ImportedE           = external dllimport global i32
 185 extern template __declspec(dllimport) int VarTmpl<ExplicitDecl_Imported>;
 186 USEVAR(VarTmpl<ExplicitDecl_Imported>)
 187
 188 // Import explicit instantiation definition of a non-imported variable template.
 189 // MSC-DAG: @"??$VarTmpl@UExplicitInst_Imported@@@@3HA" = external dllimport global i32
 190 // GNU-DAG: @_Z7VarTmplI21ExplicitInst_ImportedE           = external dllimport global i32
 191 template __declspec(dllimport) int VarTmpl<ExplicitInst_Imported>;
 192 USEVAR(VarTmpl<ExplicitInst_Imported>)
 193
 194 // Import specialization of a non-imported variable template.
 195 // MSC-DAG: @"??$VarTmpl@UExplicitSpec_Imported@@@@3HA" = external dllimport global i32
 196 // GNU-DAG: @_Z7VarTmplI21ExplicitSpec_ImportedE           = external dllimport global i32
 197 template<> __declspec(dllimport) int VarTmpl<ExplicitSpec_Imported>;
 198 USEVAR(VarTmpl<ExplicitSpec_Imported>)
 199
 200
 201
 202 //===----------------------------------------------------------------------===//
 203 // Functions
 204 //===----------------------------------------------------------------------===//
 205
 206 // GNU-DAG: declare dso_local void @_ZdlPv(ptr)
 207
 208 // Import function declaration.
 209 // MSC-DAG: declare dllimport void @"?decl@@YAXXZ"()
 210 // GNU-DAG: declare dllimport void @_Z4declv()
 211 __declspec(dllimport) void decl();
 212 USE(decl)
 213
 214 // extern "C"
 215 // MSC-DAG: declare dllimport void @externC()
 216 // GNU-DAG: declare dllimport void @externC()
 217 extern "C" __declspec(dllimport) void externC();
 218 USE(externC)
 219
 220 // Import inline function.
 221 // MSC-DAG: declare dllimport void @"?inlineFunc@@YAXXZ"()
 222 // GNU-DAG: define linkonce_odr dso_local void @_Z10inlineFuncv()
 223 // MO1-DAG: define available_externally dllimport void @"?inlineFunc@@YAXXZ"()
 224 // GO1-DAG: define linkonce_odr dso_local void @_Z10inlineFuncv()
 225 __declspec(dllimport) inline void inlineFunc() {}
 226 USE(inlineFunc)
 227
 228 // MSC-DAG: declare dllimport void @"?inlineDecl@@YAXXZ"()
 229 // GNU-DAG: define linkonce_odr dso_local void @_Z10inlineDeclv()
 230 // MO1-DAG: define available_externally dllimport void @"?inlineDecl@@YAXXZ"()
 231 // GO1-DAG: define linkonce_odr dso_local void @_Z10inlineDeclv()
 232 __declspec(dllimport) inline void inlineDecl();
 233                              void inlineDecl() {}
 234 USE(inlineDecl)
 235
 236 // MSC-DAG: declare dllimport void @"?inlineDef@@YAXXZ"()
 237 // GNU-DAG: define linkonce_odr dso_local void @_Z9inlineDefv()
 238 // MO1-DAG: define available_externally dllimport void @"?inlineDef@@YAXXZ"()
 239 // GO1-DAG: define linkonce_odr dso_local void @_Z9inlineDefv()
 240 __declspec(dllimport) void inlineDef();
 241                inline void inlineDef() {}
 242 USE(inlineDef)
 243
 244 // inline attributes
 245 // MSC-DAG: declare dllimport void @"?noinline@@YAXXZ"()
 246 // GNU-DAG: define linkonce_odr dso_local void @_Z8noinlinev()
 247 __declspec(dllimport) __attribute__((noinline)) inline void noinline() {}
 248 USE(noinline)
 249
 250 // MSC2-NOT: @"?alwaysInline@@YAXXZ"()
 251 // GNU2-NOT: @_Z12alwaysInlinev()
 252 __declspec(dllimport) __attribute__((always_inline)) inline void alwaysInline() {}
 253 USE(alwaysInline)
 254
 255 // Redeclarations
 256 // MSC-DAG: declare dllimport void @"?redecl1@@YAXXZ"()
 257 // GNU-DAG: declare dllimport void @_Z7redecl1v()
 258 __declspec(dllimport) void redecl1();
 259 __declspec(dllimport) void redecl1();
 260 USE(redecl1)
 261
 262 // NB: MSC issues a warning and makes redecl2/redecl3 dllexport. We follow GCC
 263 // and drop the dllimport with a warning.
 264 // MSC-DAG: declare dso_local void @"?redecl2@@YAXXZ"()
 265 // GNU-DAG: declare dso_local void @_Z7redecl2v()
 266 __declspec(dllimport) void redecl2();
 267                       void redecl2();
 268 USE(redecl2)
 269
 270 // MSC-DAG: define dso_local dllexport void @"?redecl3@@YAXXZ"()
 271 // GNU-DAG: define dso_local void @_Z7redecl3v()
 272 __declspec(dllimport) void redecl3();
 273                       void redecl3() {} // dllimport ignored
 274 USE(redecl3)
 275
 276
 277 // Friend functions
 278 // MSC-DAG: declare           dllimport void @"?friend1@@YAXXZ"()
 279 // GNU-DAG: declare           dllimport void @_Z7friend1v()
 280 // MSC-DAG: declare dso_local           void @"?friend2@@YAXXZ"()
 281 // GNU-DAG: declare dso_local           void @_Z7friend2v()
 282 // MSC-DAG: define  dso_local dllexport void @"?friend3@@YAXXZ"()
 283 // GNU-DAG: define  dso_local           void @_Z7friend3v()
 284 // MSC-DAG: declare dso_local           void @"?friend4@@YAXXZ"()
 285 // GNU-DAG: declare dso_local           void @_Z7friend4v()
 286 // MSC-DAG: declare           dllimport void @"?friend5@@YAXXZ"()
 287 // GNU-DAG: declare           dllimport void @_Z7friend5v()
 288
 289 struct FuncFriend {
 290   friend __declspec(dllimport) void friend1();
 291   friend __declspec(dllimport) void friend2();
 292   friend __declspec(dllimport) void friend3();
 293 };
 294 __declspec(dllimport) void friend1();
 295                       void friend2(); // dllimport ignored
 296                       void friend3() {} // dllimport ignored
 297
 298 __declspec(dllimport) void friend4();
 299 __declspec(dllimport) void friend5();
 300 struct FuncFriendRedecl {
 301   friend void friend4(); // dllimport ignored
 302   friend void ::friend5();
 303 };
 304 USE(friend1)
 305 USE(friend2)
 306 USE(friend3)
 307 USE(friend4)
 308 USE(friend5)
 309
 310 // Implicit declarations can be redeclared with dllimport.
 311 // MSC-DAG: declare dllimport nonnull ptr @"??2@{{YAPAXI|YAPEAX_K}}@Z"(
 312 // GNU-DAG: declare dllimport nonnull ptr @_Znw{{[yj]}}(
 313 __declspec(dllimport) void* operator new(__SIZE_TYPE__ n);
 314 void UNIQ(use)() { ::operator new(42); }
 315
 316 // MSC-DAG: declare dllimport void @"?externalFunc@ns@@YAXXZ"()
 317 // GNU-DAG: declare dllimport void @_ZN2ns12externalFuncEv()
 318 namespace ns { __declspec(dllimport) void externalFunc(); }
 319 USE(ns::externalFunc)
 320
 321 // A dllimport function referencing non-imported vars or functions must not be available_externally.
 322
 323 __declspec(dllimport) int ImportedVar;
 324 int NonImportedVar;
 325 __declspec(dllimport) int ImportedFunc();
 326 int NonImportedFunc();
 327 struct ClassWithNonImportedMethod { int f(); };
 328
 329 __declspec(dllimport) inline int ReferencingImportedVar() { return ImportedVar; }
 330 // MO1-DAG: define available_externally dllimport i32 @"?ReferencingImportedVar@@YAHXZ"
 331 __declspec(dllimport) inline int ReferencingNonImportedVar() { return NonImportedVar; }
 332 // MO1-DAG: declare dllimport i32 @"?ReferencingNonImportedVar@@YAHXZ"()
 333 __declspec(dllimport) inline int ReferencingImportedFunc() { return ImportedFunc(); }
 334 // MO1-DAG: define available_externally dllimport i32 @"?ReferencingImportedFunc@@YAHXZ"
 335 __declspec(dllimport) inline int ReferencingNonImportedFunc() { return NonImportedFunc(); }
 336 // MO1-DAG: declare dllimport i32 @"?ReferencingNonImportedFunc@@YAHXZ"()
 337 __declspec(dllimport) inline int ReferencingNonImportedMethod(ClassWithNonImportedMethod *x) { return x->f(); }
 338 // MO1-DAG: declare dllimport i32 @"?ReferencingNonImportedMethod
 339 __declspec(dllimport) inline int ReferencingClassMemberPtr(int (ClassWithNonImportedMethod::*p)(), ClassWithNonImportedMethod *x) { return (x->*p)(); }
 340 // MO1-DAG: define available_externally dllimport i32 @"?ReferencingClassMemberPtr@@YAHP8ClassWithNonImportedMethod@@AEHXZPAU1@@Z"
 341 USE(ReferencingImportedVar)
 342 USE(ReferencingNonImportedVar)
 343 USE(ReferencingImportedFunc)
 344 USE(ReferencingNonImportedFunc)
 345 USE1(ReferencingNonImportedMethod)
 346 void UNIQ(use)() { ReferencingClassMemberPtr(&ClassWithNonImportedMethod::f, nullptr); }
 347 // References to operator new and delete count too, despite not being DeclRefExprs.
 348 __declspec(dllimport) inline int *ReferencingNonImportedNew() { return new int[2]; }
 349 // MO1-DAG: declare dllimport ptr @"?ReferencingNonImportedNew@@YAPAHXZ"
 350 __declspec(dllimport) inline int *ReferencingNonImportedDelete() { delete (int*)nullptr; }
 351 // MO1-DAG: declare dllimport ptr @"?ReferencingNonImportedDelete@@YAPAHXZ"
 352 USE(ReferencingNonImportedNew)
 353 USE(ReferencingNonImportedDelete)
 354 __declspec(dllimport) void* operator new[](__SIZE_TYPE__);
 355 __declspec(dllimport) void operator delete(void*);
 356 __declspec(dllimport) inline int *ReferencingImportedNew() { return new int[2]; }
 357 // MO1-DAG: define available_externally dllimport ptr @"?ReferencingImportedNew@@YAPAHXZ"
 358 __declspec(dllimport) inline int *ReferencingImportedDelete() { delete (int*)nullptr; }
 359 // MO1-DAG: define available_externally dllimport ptr @"?ReferencingImportedDelete@@YAPAHXZ"
 360 USE(ReferencingImportedNew)
 361 USE(ReferencingImportedDelete)
 362 struct ClassWithDtor { ~ClassWithDtor() {} };
 363 struct __declspec(dllimport) ClassWithNonDllImportField { using X = ClassWithDtor; X t[2]; };
 364 struct __declspec(dllimport) ClassWithNonDllImportBase : public ClassWithDtor { };
 365 USECLASS(ClassWithNonDllImportField);
 366 USECLASS(ClassWithNonDllImportBase);
 367 // MO1-DAG: declare dllimport x86_thiscallcc void @"??1ClassWithNonDllImportBase@@QAE@XZ"(ptr {{[^,]*}})
 368 // MO1-DAG: declare dllimport x86_thiscallcc void @"??1ClassWithNonDllImportField@@QAE@XZ"(ptr {{[^,]*}})
 369 struct ClassWithCtor { ClassWithCtor() {} };
 370 struct __declspec(dllimport) ClassWithNonDllImportFieldWithCtor { ClassWithCtor t; };
 371 USECLASS(ClassWithNonDllImportFieldWithCtor);
 372 // MO1-DAG: declare dllimport x86_thiscallcc ptr @"??0ClassWithNonDllImportFieldWithCtor@@QAE@XZ"(ptr {{[^,]*}} returned {{[^,]*}})
 373 struct ClassWithImplicitDtor { __declspec(dllimport) ClassWithImplicitDtor(); ClassWithDtor member; };
 374 __declspec(dllimport) inline void ReferencingDtorThroughDefinition() { ClassWithImplicitDtor x; };
 375 USE(ReferencingDtorThroughDefinition)
 376 // MO1-DAG: declare dllimport void @"?ReferencingDtorThroughDefinition@@YAXXZ"()
 377 __declspec(dllimport) inline void ReferencingDtorThroughTemporary() { ClassWithImplicitDtor(); };
 378 USE(ReferencingDtorThroughTemporary)
 379 // MO1-DAG: declare dllimport void @"?ReferencingDtorThroughTemporary@@YAXXZ"()
 380
 381 // A dllimport function with a TLS variable must not be available_externally.
 382 __declspec(dllimport) inline void FunctionWithTLSVar() { static __thread int x = 42; }
 383 // MO1-DAG: declare dllimport void @"?FunctionWithTLSVar@@YAXXZ"
 384 __declspec(dllimport) inline void FunctionWithNormalVar() { static int x = 42; }
 385 // MO1-DAG: define available_externally dllimport void @"?FunctionWithNormalVar@@YAXXZ"
 386 USE(FunctionWithTLSVar)
 387 USE(FunctionWithNormalVar)
 388
 389 // always_inline and __force_inline take precedence.
 390 __declspec(dllimport) inline int ReferencingNonImportedFuncAlwaysInline() __attribute__((always_inline)) { return NonImportedFunc(); }
 391 USE(ReferencingNonImportedFuncAlwaysInline)
 392 // MO1-DAG: define available_externally dllimport i32 @"?ReferencingNonImportedFuncAlwaysInline@@YAHXZ"
 393 __declspec(dllimport) __forceinline int ReferencingNonImportedFuncForceInline() { return NonImportedFunc(); }
 394 USE(ReferencingNonImportedFuncForceInline)
 395 // MO1-DAG: define available_externally dllimport i32 @"?ReferencingNonImportedFuncForceInline@@YAHXZ"
 396
 397 //===----------------------------------------------------------------------===//
 398 // Function templates
 399 //===----------------------------------------------------------------------===//
 400
 401 // Import function template declaration.
 402 // MSC-DAG: declare dllimport void @"??$funcTmplDecl@UImplicitInst_Imported@@@@YAXXZ"()
 403 // GNU-DAG: declare dllimport void @_Z12funcTmplDeclI21ImplicitInst_ImportedEvv()
 404 template<typename T> __declspec(dllimport) void funcTmplDecl();
 405 USE(funcTmplDecl<ImplicitInst_Imported>)
 406
 407 // Function template definitions cannot be imported.
 408
 409 // Import inline function template.
 410 // MSC-DAG: declare dllimport void @"??$inlineFuncTmpl1@UImplicitInst_Imported@@@@YAXXZ"()
 411 // GNU-DAG: define linkonce_odr dso_local void @_Z15inlineFuncTmpl1I21ImplicitInst_ImportedEvv()
 412 // MO1-DAG: define available_externally dllimport void @"??$inlineFuncTmpl1@UImplicitInst_Imported@@@@YAXXZ"()
 413 // GO1-DAG: define linkonce_odr dso_local void @_Z15inlineFuncTmpl1I21ImplicitInst_ImportedEvv()
 414 template<typename T> __declspec(dllimport) inline void inlineFuncTmpl1() {}
 415 USE(inlineFuncTmpl1<ImplicitInst_Imported>)
 416
 417 // MSC-DAG: declare dllimport void @"??$inlineFuncTmpl2@UImplicitInst_Imported@@@@YAXXZ"()
 418 // GNU-DAG: define linkonce_odr dso_local void @_Z15inlineFuncTmpl2I21ImplicitInst_ImportedEvv()
 419 // MO1-DAG: define available_externally dllimport void @"??$inlineFuncTmpl2@UImplicitInst_Imported@@@@YAXXZ"()
 420 // GO1-DAG: define linkonce_odr dso_local void @_Z15inlineFuncTmpl2I21ImplicitInst_ImportedEvv()
 421 template<typename T> inline void __attribute__((dllimport)) inlineFuncTmpl2() {}
 422 USE(inlineFuncTmpl2<ImplicitInst_Imported>)
 423
 424 // MSC-DAG: define linkonce_odr dso_local void @"??$inlineFuncTmplDecl@UImplicitInst_Imported@@@@YAXXZ"()
 425 // GNU-DAG: define linkonce_odr dso_local void @_Z18inlineFuncTmplDeclI21ImplicitInst_ImportedEvv()
 426 // MO1-DAG: define linkonce_odr dso_local void @"??$inlineFuncTmplDecl@UImplicitInst_Imported@@@@YAXXZ"()
 427 // GO1-DAG: define linkonce_odr dso_local void @_Z18inlineFuncTmplDeclI21ImplicitInst_ImportedEvv()
 428 template<typename T> __declspec(dllimport) inline void inlineFuncTmplDecl();
 429 template<typename T>                              void inlineFuncTmplDecl() {}
 430 USE(inlineFuncTmplDecl<ImplicitInst_Imported>)
 431
 432 // MSC-DAG: define linkonce_odr dso_local void @"??$inlineFuncTmplDef@UImplicitInst_Imported@@@@YAXXZ"()
 433 // GNU-DAG: define linkonce_odr dso_local void @_Z17inlineFuncTmplDefI21ImplicitInst_ImportedEvv()
 434 // MO1-DAG: define linkonce_odr dso_local void @"??$inlineFuncTmplDef@UImplicitInst_Imported@@@@YAXXZ"()
 435 // GO1-DAG: define linkonce_odr dso_local void @_Z17inlineFuncTmplDefI21ImplicitInst_ImportedEvv()
 436 template<typename T> __declspec(dllimport) void inlineFuncTmplDef();
 437 template<typename T>                inline void inlineFuncTmplDef() {}
 438 USE(inlineFuncTmplDef<ImplicitInst_Imported>)
 439
 440
 441 // Redeclarations
 442 // MSC-DAG: declare dllimport void @"??$funcTmplRedecl1@UImplicitInst_Imported@@@@YAXXZ"()
 443 // GNU-DAG: declare dllimport void @_Z15funcTmplRedecl1I21ImplicitInst_ImportedEvv()
 444 template<typename T> __declspec(dllimport) void funcTmplRedecl1();
 445 template<typename T> __declspec(dllimport) void funcTmplRedecl1();
 446 USE(funcTmplRedecl1<ImplicitInst_Imported>)
 447
 448 // MSC-DAG: declare dso_local void @"??$funcTmplRedecl2@UImplicitInst_NotImported@@@@YAXXZ"()
 449 // GNU-DAG: declare dso_local void @_Z15funcTmplRedecl2I24ImplicitInst_NotImportedEvv()
 450 template<typename T> __declspec(dllimport) void funcTmplRedecl2();
 451 template<typename T>                       void funcTmplRedecl2(); // dllimport ignored
 452 USE(funcTmplRedecl2<ImplicitInst_NotImported>)
 453
 454 // MSC-DAG: define linkonce_odr dso_local void @"??$funcTmplRedecl3@UImplicitInst_NotImported@@@@YAXXZ"()
 455 // GNU-DAG: define linkonce_odr dso_local void @_Z15funcTmplRedecl3I24ImplicitInst_NotImportedEvv()
 456 template<typename T> __declspec(dllimport) void funcTmplRedecl3();
 457 template<typename T>                       void funcTmplRedecl3() {} // dllimport ignored
 458 USE(funcTmplRedecl3<ImplicitInst_NotImported>)
 459
 460
 461 // Function template friends
 462 // MSC-DAG: declare dllimport   void @"??$funcTmplFriend1@UImplicitInst_Imported@@@@YAXXZ"()
 463 // GNU-DAG: declare dllimport   void @_Z15funcTmplFriend1I21ImplicitInst_ImportedEvv()
 464 // MSC-DAG: declare             dso_local void @"??$funcTmplFriend2@UImplicitInst_NotImported@@@@YAXXZ"()
 465 // GNU-DAG: declare             dso_local void @_Z15funcTmplFriend2I24ImplicitInst_NotImportedEvv()
 466 // MSC-DAG: define linkonce_odr dso_local void @"??$funcTmplFriend3@UImplicitInst_NotImported@@@@YAXXZ"()
 467 // GNU-DAG: define linkonce_odr dso_local void @_Z15funcTmplFriend3I24ImplicitInst_NotImportedEvv()
 468 // MSC-DAG: define linkonce_odr dso_local void @"??$funcTmplFriend4@UImplicitInst_Imported@@@@YAXXZ"()
 469 // GNU-DAG: define linkonce_odr dso_local void @_Z15funcTmplFriend4I21ImplicitInst_ImportedEvv()
 470 struct FuncTmplFriend {
 471   template<typename T> friend __declspec(dllimport) void funcTmplFriend1();
 472   template<typename T> friend __declspec(dllimport) void funcTmplFriend2();
 473   template<typename T> friend __declspec(dllimport) void funcTmplFriend3();
 474   template<typename T> friend __declspec(dllimport) inline void funcTmplFriend4();
 475 };
 476 template<typename T> __declspec(dllimport) void funcTmplFriend1();
 477 template<typename T>                       void funcTmplFriend2(); // dllimport ignored
 478 template<typename T>                       void funcTmplFriend3() {} // dllimport ignored
 479 template<typename T>                       inline void funcTmplFriend4() {}
 480 USE(funcTmplFriend1<ImplicitInst_Imported>)
 481 USE(funcTmplFriend2<ImplicitInst_NotImported>)
 482 USE(funcTmplFriend3<ImplicitInst_NotImported>)
 483 USE(funcTmplFriend4<ImplicitInst_Imported>)
 484
 485 // MSC-DAG: declare dllimport void @"??$externalFuncTmpl@UImplicitInst_Imported@@@ns@@YAXXZ"()
 486 // GNU-DAG: declare dllimport void @_ZN2ns16externalFuncTmplI21ImplicitInst_ImportedEEvv()
 487 namespace ns { template<typename T> __declspec(dllimport) void externalFuncTmpl(); }
 488 USE(ns::externalFuncTmpl<ImplicitInst_Imported>)
 489
 490
 491 template<typename T> void funcTmpl() {}
 492 template<typename T> inline void inlineFuncTmpl() {}
 493 template<typename T> __declspec(dllimport) void importedFuncTmplDecl();
 494 template<typename T> __declspec(dllimport) inline void importedFuncTmpl() {}
 495
 496 // Import implicit instantiation of an imported function template.
 497 // MSC-DAG: declare dllimport void @"??$importedFuncTmplDecl@UImplicitInst_Imported@@@@YAXXZ"()
 498 // GNU-DAG: declare dllimport void @_Z20importedFuncTmplDeclI21ImplicitInst_ImportedEvv()
 499 USE(importedFuncTmplDecl<ImplicitInst_Imported>)
 500
 501 // MSC-DAG: declare dllimport void @"??$importedFuncTmpl@UImplicitInst_Imported@@@@YAXXZ"()
 502 // GNU-DAG: define linkonce_odr dso_local void @_Z16importedFuncTmplI21ImplicitInst_ImportedEvv()
 503 // MO1-DAG: define available_externally dllimport void @"??$importedFuncTmpl@UImplicitInst_Imported@@@@YAXXZ"()
 504 // GO1-DAG: define linkonce_odr dso_local void @_Z16importedFuncTmplI21ImplicitInst_ImportedEvv()
 505 USE(importedFuncTmpl<ImplicitInst_Imported>)
 506
 507 // Import explicit instantiation declaration of an imported function template.
 508 // MSC-DAG: declare dllimport void @"??$importedFuncTmpl@UExplicitDecl_Imported@@@@YAXXZ"()
 509 // GNU-DAG: declare dso_local void @_Z16importedFuncTmplI21ExplicitDecl_ImportedEvv()
 510 // MO1-DAG: define available_externally dllimport void @"??$importedFuncTmpl@UExplicitDecl_Imported@@@@YAXXZ"()
 511 // GO1-DAG: define available_externally dso_local void @_Z16importedFuncTmplI21ExplicitDecl_ImportedEvv()
 512 extern template void importedFuncTmpl<ExplicitDecl_Imported>();
 513 USE(importedFuncTmpl<ExplicitDecl_Imported>)
 514
 515 // Import explicit instantiation definition of an imported function template.
 516 // MSC-DAG: declare dllimport void @"??$importedFuncTmpl@UExplicitInst_Imported@@@@YAXXZ"()
 517 // GNU-DAG: define weak_odr dso_local void @_Z16importedFuncTmplI21ExplicitInst_ImportedEvv()
 518 // MO1-DAG: define available_externally dllimport void @"??$importedFuncTmpl@UExplicitInst_Imported@@@@YAXXZ"()
 519 // GO1-DAG: define weak_odr dso_local void @_Z16importedFuncTmplI21ExplicitInst_ImportedEvv()
 520 template void importedFuncTmpl<ExplicitInst_Imported>();
 521 USE(importedFuncTmpl<ExplicitInst_Imported>)
 522
 523
 524 // Import specialization of an imported function template.
 525 // MSC-DAG: declare dllimport void @"??$importedFuncTmplDecl@UExplicitSpec_Imported@@@@YAXXZ"()
 526 // GNU-DAG: declare dllimport void @_Z20importedFuncTmplDeclI21ExplicitSpec_ImportedEvv()
 527 template<> __declspec(dllimport) void importedFuncTmplDecl<ExplicitSpec_Imported>();
 528 USE(importedFuncTmplDecl<ExplicitSpec_Imported>)
 529
 530 // MSC-DAG-FIXME: declare dllimport void @"??$importedFuncTmplDecl@UExplicitSpec_Def_Imported@@@@YAXXZ"()
 531 // MO1-DAG-FIXME: define available_externally dllimport void @"??$importedFuncTmplDecl@UExplicitSpec_Def_Imported@@@@YAXXZ"()
 532 #ifdef MSABI
 533 //template<> __declspec(dllimport) void importedFuncTmplDecl<ExplicitSpec_Def_Imported>() {}
 534 //USE(importedFuncTmplDecl<ExplicitSpec_Def_Imported>)
 535 #endif
 536
 537 // MSC-DAG: declare dllimport void @"??$importedFuncTmplDecl@UExplicitSpec_InlineDef_Imported@@@@YAXXZ"()
 538 // GNU-DAG: define linkonce_odr dso_local void @_Z20importedFuncTmplDeclI31ExplicitSpec_InlineDef_ImportedEvv()
 539 // MO1-DAG: define available_externally dllimport void @"??$importedFuncTmplDecl@UExplicitSpec_InlineDef_Imported@@@@YAXXZ"()
 540 // GO1-DAG: define linkonce_odr dso_local void @_Z20importedFuncTmplDeclI31ExplicitSpec_InlineDef_ImportedEvv()
 541 template<> __declspec(dllimport) inline void importedFuncTmplDecl<ExplicitSpec_InlineDef_Imported>() {}
 542 USE(importedFuncTmplDecl<ExplicitSpec_InlineDef_Imported>)
 543
 544
 545 // MSC-DAG: declare dllimport void @"??$importedFuncTmpl@UExplicitSpec_Imported@@@@YAXXZ"()
 546 // GNU-DAG: declare dllimport void @_Z16importedFuncTmplI21ExplicitSpec_ImportedEvv()
 547 template<> __declspec(dllimport) void importedFuncTmpl<ExplicitSpec_Imported>();
 548 USE(importedFuncTmpl<ExplicitSpec_Imported>)
 549
 550 // MSC-DAG-FIXME: declare dllimport void @"??$importedFuncTmpl@UExplicitSpec_Def_Imported@@@@YAXXZ"()
 551 // MO1-DAG-FIXME: define available_externally dllimport void @"??$importedFuncTmpl@UExplicitSpec_Def_Imported@@@@YAXXZ"()
 552 #ifdef MSABI
 553 //template<> __declspec(dllimport) void importedFuncTmpl<ExplicitSpec_Def_Imported>() {}
 554 //USE(importedFuncTmpl<ExplicitSpec_Def_Imported>)
 555 #endif
 556
 557 // MSC-DAG: declare dllimport void @"??$importedFuncTmpl@UExplicitSpec_InlineDef_Imported@@@@YAXXZ"()
 558 // GNU-DAG: define linkonce_odr dso_local void @_Z16importedFuncTmplI31ExplicitSpec_InlineDef_ImportedEvv()
 559 // MO1-DAG: define available_externally dllimport void @"??$importedFuncTmpl@UExplicitSpec_InlineDef_Imported@@@@YAXXZ"()
 560 // GO1-DAG: define linkonce_odr dso_local void @_Z16importedFuncTmplI31ExplicitSpec_InlineDef_ImportedEvv()
 561 template<> __declspec(dllimport) inline void importedFuncTmpl<ExplicitSpec_InlineDef_Imported>() {}
 562 USE(importedFuncTmpl<ExplicitSpec_InlineDef_Imported>)
 563
 564
 565 // Not importing specialization of an imported function template without
 566 // explicit dllimport.
 567 // MSC-DAG: define dso_local void @"??$importedFuncTmpl@UExplicitSpec_NotImported@@@@YAXXZ"()
 568 // GNU-DAG: define dso_local void @_Z16importedFuncTmplI24ExplicitSpec_NotImportedEvv()
 569 template<> void importedFuncTmpl<ExplicitSpec_NotImported>() {}
 570 USE(importedFuncTmpl<ExplicitSpec_NotImported>)
 571
 572
 573 // Import explicit instantiation declaration of a non-imported function template.
 574 // MSC-DAG: declare dllimport void @"??$funcTmpl@UExplicitDecl_Imported@@@@YAXXZ"()
 575 // MSC-DAG: declare dllimport void @"??$inlineFuncTmpl@UExplicitDecl_Imported@@@@YAXXZ"()
 576 // GNU-DAG: declare dllimport void @_Z8funcTmplI21ExplicitDecl_ImportedEvv()
 577 // GNU-DAG: declare dso_local void @_Z14inlineFuncTmplI21ExplicitDecl_ImportedEvv()
 578 // MO1-DAG: define available_externally dllimport void @"??$inlineFuncTmpl@UExplicitDecl_Imported@@@@YAXXZ"()
 579 // GO1-DAG: define available_externally dso_local void @_Z14inlineFuncTmplI21ExplicitDecl_ImportedEvv()
 580 extern template __declspec(dllimport) void funcTmpl<ExplicitDecl_Imported>();
 581 extern template __declspec(dllimport) void inlineFuncTmpl<ExplicitDecl_Imported>();
 582 USE(funcTmpl<ExplicitDecl_Imported>)
 583 USE(inlineFuncTmpl<ExplicitDecl_Imported>)
 584
 585
 586 // Import explicit instantiation definition of a non-imported function template.
 587 // MSC-DAG: declare dllimport void @"??$funcTmpl@UExplicitInst_Imported@@@@YAXXZ"()
 588 // MSC-DAG: declare dllimport void @"??$inlineFuncTmpl@UExplicitInst_Imported@@@@YAXXZ"()
 589 // GNU-DAG: declare dllimport void @_Z8funcTmplI21ExplicitInst_ImportedEvv()
 590 // GNU-DAG: define weak_odr dso_local void @_Z14inlineFuncTmplI21ExplicitInst_ImportedEvv()
 591 // MO1-DAG: declare dllimport void @"??$funcTmpl@UExplicitInst_Imported@@@@YAXXZ"()
 592 // MO1-DAG: define available_externally dllimport void @"??$inlineFuncTmpl@UExplicitInst_Imported@@@@YAXXZ"()
 593 // GO1-DAG: define available_externally dllimport void @_Z8funcTmplI21ExplicitInst_ImportedEvv()
 594 // GO1-DAG: define weak_odr dso_local void @_Z14inlineFuncTmplI21ExplicitInst_ImportedEvv()
 595 template __declspec(dllimport) void funcTmpl<ExplicitInst_Imported>();
 596 template __declspec(dllimport) void inlineFuncTmpl<ExplicitInst_Imported>();
 597 USE(funcTmpl<ExplicitInst_Imported>)
 598 USE(inlineFuncTmpl<ExplicitInst_Imported>)
 599
 600
 601 // Import specialization of a non-imported function template.
 602 // MSC-DAG: declare dllimport void @"??$funcTmpl@UExplicitSpec_Imported@@@@YAXXZ"()
 603 // GNU-DAG: declare dllimport void @_Z8funcTmplI21ExplicitSpec_ImportedEvv()
 604 template<> __declspec(dllimport) void funcTmpl<ExplicitSpec_Imported>();
 605 USE(funcTmpl<ExplicitSpec_Imported>)
 606
 607 // MSC-DAG-FIXME: declare dllimport void @"??$funcTmpl@UExplicitSpec_Def_Imported@@@@YAXXZ"()
 608 // MO1-DAG-FIXME: define available_externally dllimport void @"??$funcTmpl@UExplicitSpec_Def_Imported@@@@YAXXZ"()
 609 #ifdef MSABI
 610 //template<> __declspec(dllimport) void funcTmpl<ExplicitSpec_Def_Imported>() {}
 611 //USE(funcTmpl<ExplicitSpec_Def_Imported>)
 612 #endif
 613
 614 // MSC-DAG: declare dllimport void @"??$funcTmpl@UExplicitSpec_InlineDef_Imported@@@@YAXXZ"()
 615 // GNU-DAG: define linkonce_odr dso_local void @_Z8funcTmplI31ExplicitSpec_InlineDef_ImportedEvv()
 616 // MO1-DAG: define available_externally dllimport void @"??$funcTmpl@UExplicitSpec_InlineDef_Imported@@@@YAXXZ"()
 617 // GO1-DAG: define linkonce_odr dso_local void @_Z8funcTmplI31ExplicitSpec_InlineDef_ImportedEvv()
 618 template<> __declspec(dllimport) inline void funcTmpl<ExplicitSpec_InlineDef_Imported>() {}
 619 USE(funcTmpl<ExplicitSpec_InlineDef_Imported>)
 620
 621 #ifdef MSABI
 622 namespace pr35435 {
 623 struct X;
 624 template <typename T> struct __declspec(dllimport) S {
 625   void foo(T *t) { t->problem(); }
 626 };
 627 template void S<X>::foo(X*); // Cannot be instantiated because X is incomplete; dllimport means it's treated as an instantiation decl.
 628 }
 629 #endif
 630
 631
 632 //===----------------------------------------------------------------------===//
 633 // Classes
 634 //===----------------------------------------------------------------------===//
 635
 636 struct __declspec(dllimport) T {
 637   void a() {}
 638   // MO1-DAG: define available_externally dllimport x86_thiscallcc void @"?a@T@@QAEXXZ"
 639
 640   static void StaticMethod();
 641   // MSC-DAG: declare dllimport void @"?StaticMethod@T@@SAXXZ"()
 642   // GNU-DAG: declare dllimport void @_ZN1T12StaticMethodEv()
 643
 644   static int b;
 645   // MO1-DAG: @"?b@T@@2HA" = external dllimport global i32
 646
 647   T& operator=(T&) = default;
 648   // MO1-DAG: define available_externally dllimport x86_thiscallcc nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) ptr @"??4T@@QAEAAU0@AAU0@@Z"
 649
 650   T& operator=(T&&) = default;
 651   // Note: Don't mark inline move operators dllimport because current MSVC versions don't export them.
 652   // M18-DAG: define linkonce_odr dso_local x86_thiscallcc nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) ptr @"??4T@@QAEAAU0@$$QAU0@@Z"
 653   // M19-DAG: define available_externally dllimport x86_thiscallcc nonnull align {{[0-9]+}} dereferenceable({{[0-9]+}}) ptr @"??4T@@QAEAAU0@$$QAU0@@Z"
 654 };
 655 USEMEMFUNC(T, a)
 656 USESTATICMEMFUNC(T, StaticMethod)
 657 USEVAR(T::b)
 658 USECOPYASSIGN(T)
 659 USEMOVEASSIGN(T)
 660
 661 template <typename T> struct __declspec(dllimport) U { void foo() {} };
 662 // MO1-DAG: define available_externally dllimport x86_thiscallcc void @"?foo@?$U@H@@QAEXXZ"
 663 struct __declspec(dllimport) V : public U<int> { };
 664 USEMEMFUNC(V, foo)
 665
 666 struct __declspec(dllimport) W { virtual void foo() {} };
 667 USECLASS(W)
 668 // vftable:
 669 // MO1-DAG: @"??_SW@@6B@" = linkonce_odr unnamed_addr constant { [1 x ptr] } { [1 x ptr] [ptr @"?foo@W@@UAEXXZ"] }
 670 // GO1-DAG: @_ZTV1W = available_externally dllimport unnamed_addr constant { [3 x ptr] } { [3 x ptr] [ptr null, ptr null, ptr @_ZN1W3fooEv] }
 671
 672 struct __declspec(dllimport) KeyFuncClass {
 673   constexpr KeyFuncClass() {}
 674   virtual void foo();
 675 };
 676 extern constexpr KeyFuncClass keyFuncClassVar = {};
 677 // G32-DAG: @_ZTV12KeyFuncClass = external dllimport unnamed_addr constant { [3 x ptr] }
 678
 679 struct __declspec(dllimport) X : public virtual W {};
 680 USECLASS(X)
 681 // vbtable:
 682 // MO1-DAG: @"??_8X@@7B@" = available_externally dllimport unnamed_addr constant [2 x i32] [i32 0, i32 4]
 683
 684 struct __declspec(dllimport) Y {
 685   int x;
 686 };
 687
 688 struct __declspec(dllimport) Z { virtual ~Z() {} };
 689 USECLASS(Z)
 690 // User-defined dtor:
 691 // MO1-DAG: define available_externally dllimport x86_thiscallcc void @"??1Z@@UAE@XZ"
 692
 693 namespace DontUseDtorAlias {
 694   struct __declspec(dllimport) A { ~A(); };
 695   struct __declspec(dllimport) B : A { ~B(); };
 696   inline A::~A() { }
 697   inline B::~B() { }
 698   // Emit a real definition of B's constructor; don't alias it to A's.
 699   // MO1-DAG: available_externally dllimport x86_thiscallcc void @"??1B@DontUseDtorAlias@@QAE@XZ"
 700   USECLASS(B)
 701 }
 702
 703 namespace Vtordisp {
 704   // Don't dllimport the vtordisp.
 705   // MO1-DAG: define linkonce_odr dso_local x86_thiscallcc void @"?f@?$C@H@Vtordisp@@$4PPPPPPPM@A@AEXXZ"
 706
 707   class __declspec(dllimport) Base {
 708     virtual void f() {}
 709   };
 710   template <typename T>
 711   class __declspec(dllimport) C : virtual public Base {
 712   public:
 713     C() {}
 714     virtual void f() {}
 715   };
 716   USECLASS(C<int>);
 717 }
 718
 719 namespace ClassTemplateStaticDef {
 720   // Regular template static field:
 721   template <typename T> struct __declspec(dllimport) S {
 722     static int x;
 723   };
 724   template <typename T> int S<T>::x;
 725   // MSC-DAG: @"?x@?$S@H@ClassTemplateStaticDef@@2HA" = external dllimport global i32
 726   int f() { return S<int>::x; }
 727
 728   // Partial class template specialization static field:
 729   template <typename A> struct T;
 730   template <typename A> struct __declspec(dllimport) T<A*> {
 731     static int x;
 732   };
 733   template <typename A> int T<A*>::x;
 734   // GNU-DAG: @_ZN22ClassTemplateStaticDef1TIPvE1xE = external dllimport global i32
 735   int g() { return T<void*>::x; }
 736 }
 737
 738 namespace PR19933 {
 739 // Don't dynamically initialize dllimport vars.
 740 // MSC2-NOT: @llvm.global_ctors
 741 // GNU2-NOT: @llvm.global_ctors
 742
 743   struct NonPOD { NonPOD(); };
 744   template <typename T> struct A { static NonPOD x; };
 745   template <typename T> NonPOD A<T>::x;
 746   template struct __declspec(dllimport) A<int>;
 747   USEVARTYPE(NonPOD, A<int>::x);
 748   // MSC-DAG: @"?x@?$A@H@PR19933@@2UNonPOD@2@A" = external dllimport global %"struct.PR19933::NonPOD"
 749
 750   int f();
 751   template <typename T> struct B { static int x; };
 752   template <typename T> int B<T>::x = f();
 753   template struct __declspec(dllimport) B<int>;
 754   USEVAR(B<int>::x);
 755   // MSC-DAG: @"?x@?$B@H@PR19933@@2HA" = external dllimport global i32
 756
 757   constexpr int g() { return 42; }
 758   template <typename T> struct C { static int x; };
 759   template <typename T> int C<T>::x = g();
 760   template struct __declspec(dllimport) C<int>;
 761   USEVAR(C<int>::x);
 762   // MSC-DAG: @"?x@?$C@H@PR19933@@2HA" = external dllimport global i32
 763
 764   template <int I> struct D { static int x, y; };
 765   template <int I> int D<I>::x = I + 1;
 766   template <int I> int D<I>::y = I + f();
 767   template struct __declspec(dllimport) D<42>;
 768   USEVAR(D<42>::x);
 769   USEVAR(D<42>::y);
 770   // MSC-DAG: @"?x@?$D@$0CK@@PR19933@@2HA" = external dllimport global i32
 771   // MSC-DAG: @"?y@?$D@$0CK@@PR19933@@2HA" = external dllimport global i32
 772 }
 773
 774 namespace PR21355 {
 775   struct __declspec(dllimport) S {
 776     virtual ~S();
 777   };
 778   S::~S() {}
 779
 780   // S::~S is a key function, so we would ordinarily emit a strong definition for
 781   // the vtable. However, S is imported, so the vtable should be too.
 782
 783   // GNU-DAG: @_ZTVN7PR213551SE = available_externally dllimport unnamed_addr constant { [4 x ptr] }
 784 }
 785
 786 namespace PR21366 {
 787   struct __declspec(dllimport) S {
 788     void outOfLineMethod();
 789     void inlineMethod() {}
 790     inline void anotherInlineMethod();
 791     void outOfClassInlineMethod();
 792   };
 793   void S::anotherInlineMethod() {}
 794   inline void S::outOfClassInlineMethod() {}
 795 }
 796
 797 namespace PR27319 {
 798   // Make sure we don't assert due to not having checked for operator delete on
 799   // the destructor.
 800   template <typename> struct A {
 801     virtual ~A() = default;
 802   };
 803   extern template struct __declspec(dllimport) A<int>;
 804   void f() { new A<int>(); }
 805   // MO1-DAG: @"??_S?$A@H@PR27319@@6B@" = linkonce_odr unnamed_addr constant { [1 x ptr] }
 806 }
 807
 808 // MS ignores DLL attributes on partial specializations.
 809 template <typename T> struct PartiallySpecializedClassTemplate {};
 810 template <typename T> struct __declspec(dllimport) PartiallySpecializedClassTemplate<T*> { void f(); };
 811 USEMEMFUNC(PartiallySpecializedClassTemplate<void*>, f);
 812 // M32-DAG: declare dso_local x86_thiscallcc void @"?f@?$PartiallySpecializedClassTemplate@PAX@@QAEXXZ"
 813 // G32-DAG: declare dllimport x86_thiscallcc void @_ZN33PartiallySpecializedClassTemplateIPvE1fEv
 814
 815 // Attributes on explicit specializations are honored.
 816 template <typename T> struct ExplicitlySpecializedClassTemplate {};
 817 template <> struct __declspec(dllimport) ExplicitlySpecializedClassTemplate<void*> { void f(); };
 818 USEMEMFUNC(ExplicitlySpecializedClassTemplate<void*>, f);
 819 // M32-DAG: declare dllimport x86_thiscallcc void @"?f@?$ExplicitlySpecializedClassTemplate@PAX@@QAEXXZ"
 820 // G32-DAG: declare dllimport x86_thiscallcc void @_ZN34ExplicitlySpecializedClassTemplateIPvE1fEv
 821
 822 // MS inherits DLL attributes to partial specializations.
 823 template <typename T> struct __declspec(dllimport) PartiallySpecializedImportedClassTemplate {};
 824 template <typename T> struct PartiallySpecializedImportedClassTemplate<T*> { void f() {} };
 825 USEMEMFUNC(PartiallySpecializedImportedClassTemplate<void*>, f);
 826 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"?f@?$PartiallySpecializedImportedClassTemplate@PAX@@QAEXXZ"
 827 // G32-DAG: define linkonce_odr dso_local x86_thiscallcc void @_ZN41PartiallySpecializedImportedClassTemplateIPvE1fEv
 828
 829 // Attributes on the instantiation take precedence over attributes on the template.
 830 template <typename T> struct __declspec(dllexport) ExplicitlyInstantiatedWithDifferentAttr { void f() {} };
 831 template struct __declspec(dllimport) ExplicitlyInstantiatedWithDifferentAttr<int>;
 832 USEMEMFUNC(ExplicitlyInstantiatedWithDifferentAttr<int>, f);
 833 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"?f@?$ExplicitlyInstantiatedWithDifferentAttr@H@@QAEXXZ"
 834
 835 template <typename T> struct ExplicitInstantiationDeclImportedDefTemplate { void f() {} ExplicitInstantiationDeclImportedDefTemplate() {}};
 836 extern template struct ExplicitInstantiationDeclImportedDefTemplate<int>;
 837 template struct __declspec(dllimport) ExplicitInstantiationDeclImportedDefTemplate<int>;
 838 USECLASS(ExplicitInstantiationDeclImportedDefTemplate<int>);
 839 USEMEMFUNC(ExplicitInstantiationDeclImportedDefTemplate<int>, f);
 840 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"?f@?$ExplicitInstantiationDeclImportedDefTemplate@H@@QAEXXZ"
 841 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc ptr @"??0?$ExplicitInstantiationDeclImportedDefTemplate@H@@QAE@XZ"
 842 // G32-DAG: define weak_odr dso_local x86_thiscallcc void @_ZN44ExplicitInstantiationDeclImportedDefTemplateIiE1fEv
 843
 844 template <typename T> struct __declspec(dllimport) ExplicitInstantiationDeclExportedDefImportedTemplate { void f() {} ExplicitInstantiationDeclExportedDefImportedTemplate() {} };
 845 extern template struct __declspec(dllimport) ExplicitInstantiationDeclExportedDefImportedTemplate <int>;
 846 template struct __declspec(dllexport) ExplicitInstantiationDeclExportedDefImportedTemplate<int>;
 847 USECLASS(ExplicitInstantiationDeclExportedDefImportedTemplate<int>);
 848 USEMEMFUNC(ExplicitInstantiationDeclExportedDefImportedTemplate<int>, f);
 849 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"?f@?$ExplicitInstantiationDeclExportedDefImportedTemplate@H@@QAEXXZ"
 850 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc ptr @"??0?$ExplicitInstantiationDeclExportedDefImportedTemplate@H@@QAE@XZ"
 851
 852 template <typename T> struct PR23770BaseTemplate { void f() {} };
 853 template <typename T> struct PR23770DerivedTemplate : PR23770BaseTemplate<int> {};
 854 extern template struct PR23770DerivedTemplate<int>;
 855 template struct __declspec(dllimport) PR23770DerivedTemplate<int>;
 856 USEMEMFUNC(PR23770BaseTemplate<int>, f);
 857 // M32-DAG: declare dllimport x86_thiscallcc void @"?f@?$PR23770BaseTemplate@H@@QAEXXZ"
 858
 859 namespace PR27810 {
 860   template <class T>
 861   struct basic_ostream {
 862     struct sentry {
 863       sentry() { }
 864       void foo() { }
 865     };
 866   };
 867   template class __declspec(dllimport) basic_ostream<char>;
 868   // The explicit instantiation definition acts as an explicit instantiation
 869   // *declaration*, dllimport is not inherited by the inner class, and no
 870   // functions are emitted unless they are used.
 871
 872   USEMEMFUNC(basic_ostream<char>::sentry, foo);
 873   // M32-DAG: define linkonce_odr dso_local x86_thiscallcc void @"?foo@sentry@?$basic_ostream@D@PR27810@@QAEXXZ"
 874   // M32-NOT: ??0sentry@?$basic_ostream@D@PR27810@@QAE@XZ
 875 }
 876
 877 namespace PR27811 {
 878   template <class T> struct codecvt {
 879     virtual ~codecvt() { }
 880   };
 881   template class __declspec(dllimport) codecvt<char>;
 882
 883   // dllimport means this explicit instantiation definition gets treated as a
 884   // declaration. Thus, the vtable should not be marked used, and in fact
 885   // nothing for this class should be emitted at all since it's not used.
 886   // M32-NOT: codecvt
 887 }
 888
 889 //===----------------------------------------------------------------------===//
 890 // Classes with template base classes
 891 //===----------------------------------------------------------------------===//
 892
 893 template <typename T> struct ClassTemplate { void func() {} };
 894 template <typename T> struct __declspec(dllexport) ExportedClassTemplate { void func(); };
 895 template <typename T> void ExportedClassTemplate<T>::func() {}
 896 template <typename T> struct __declspec(dllimport) ImportedClassTemplate { void func(); };
 897
 898 template <typename T> struct ExplicitlySpecializedTemplate { void func() {} };
 899 template <> struct ExplicitlySpecializedTemplate<int> { void func() {} };
 900 template <typename T> struct ExplicitlyExportSpecializedTemplate { void func() {} };
 901 template <> struct __declspec(dllexport) ExplicitlyExportSpecializedTemplate<int> { void func(); };
 902 void ExplicitlyExportSpecializedTemplate<int>::func() {}
 903 template <typename T> struct ExplicitlyImportSpecializedTemplate { void func() {} };
 904 template <> struct __declspec(dllimport) ExplicitlyImportSpecializedTemplate<int> { void func(); };
 905
 906 template <typename T> struct ExplicitlyInstantiatedTemplate { void func() {} };
 907 template struct ExplicitlyInstantiatedTemplate<int>;
 908 template <typename T> struct ExplicitlyExportInstantiatedTemplate { void func(); };
 909 template <typename T> void ExplicitlyExportInstantiatedTemplate<T>::func() {}
 910 template struct __declspec(dllexport) ExplicitlyExportInstantiatedTemplate<int>;
 911 template <typename T> struct ExplicitlyImportInstantiatedTemplate { void func(); };
 912 template struct __declspec(dllimport) ExplicitlyImportInstantiatedTemplate<int>;
 913
 914
 915 // MS: ClassTemplate<int> gets imported.
 916 struct __declspec(dllimport) DerivedFromTemplate : public ClassTemplate<int> {};
 917 USEMEMFUNC(ClassTemplate<int>, func)
 918 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"?func@?$ClassTemplate@H@@QAEXXZ"
 919 // G32-DAG: define linkonce_odr dso_local x86_thiscallcc void @_ZN13ClassTemplateIiE4funcEv
 920
 921 // ImportedTemplate is explicitly imported.
 922 struct __declspec(dllimport) DerivedFromImportedTemplate : public ImportedClassTemplate<int> {};
 923 USEMEMFUNC(ImportedClassTemplate<int>, func)
 924 // M32-DAG: declare dllimport x86_thiscallcc void @"?func@?$ImportedClassTemplate@H@@QAEXXZ"
 925 // G32-DAG: declare dllimport x86_thiscallcc void @_ZN21ImportedClassTemplateIiE4funcEv
 926
 927 // ExportedTemplate is explicitly exported.
 928 struct __declspec(dllimport) DerivedFromExportedTemplate : public ExportedClassTemplate<int> {};
 929 USEMEMFUNC(ExportedClassTemplate<int>, func)
 930 // M32-DAG: define weak_odr dso_local dllexport x86_thiscallcc void @"?func@?$ExportedClassTemplate@H@@QAEXXZ"
 931 // G32-DAG: define weak_odr dso_local dllexport x86_thiscallcc void @_ZN21ExportedClassTemplateIiE4funcEv
 932
 933 // Base class already implicitly instantiated without attribute.
 934 struct DerivedFromTemplateD : public ClassTemplate<double> {};
 935 struct __declspec(dllimport) DerivedFromTemplateD2 : public ClassTemplate<double> {};
 936 USEMEMFUNC(ClassTemplate<double>, func)
 937 // M32-DAG: declare dllimport x86_thiscallcc void @"?func@?$ClassTemplate@N@@QAEXXZ"
 938 // G32-DAG: define linkonce_odr dso_local x86_thiscallcc void @_ZN13ClassTemplateIdE4funcEv
 939
 940 // MS: Base class already instantiated with dfferent attribute.
 941 struct __declspec(dllexport) DerivedFromTemplateB : public ClassTemplate<bool> {};
 942 struct __declspec(dllimport) DerivedFromTemplateB2 : public ClassTemplate<bool> {};
 943 USEMEMFUNC(ClassTemplate<bool>, func)
 944 // M32-DAG: define weak_odr dso_local dllexport x86_thiscallcc void @"?func@?$ClassTemplate@_N@@QAEXXZ"
 945 // G32-DAG: define linkonce_odr dso_local x86_thiscallcc void @_ZN13ClassTemplateIbE4funcEv
 946
 947 // Base class already specialized without dll attribute.
 948 struct __declspec(dllimport) DerivedFromExplicitlySpecializedTemplate : public ExplicitlySpecializedTemplate<int> {};
 949 USEMEMFUNC(ExplicitlySpecializedTemplate<int>, func)
 950 // M32-DAG: define linkonce_odr dso_local x86_thiscallcc void @"?func@?$ExplicitlySpecializedTemplate@H@@QAEXXZ"
 951 // G32-DAG: define linkonce_odr dso_local x86_thiscallcc void @_ZN29ExplicitlySpecializedTemplateIiE4funcEv
 952
 953 // Base class alredy specialized with export attribute.
 954 struct __declspec(dllimport) DerivedFromExplicitlyExportSpecializedTemplate : public ExplicitlyExportSpecializedTemplate<int> {};
 955 USEMEMFUNC(ExplicitlyExportSpecializedTemplate<int>, func)
 956 // M32-DAG: define dso_local dllexport x86_thiscallcc void @"?func@?$ExplicitlyExportSpecializedTemplate@H@@QAEXXZ"
 957 // G32-DAG: define dso_local dllexport x86_thiscallcc void @_ZN35ExplicitlyExportSpecializedTemplateIiE4funcEv
 958
 959 // Base class already specialized with import attribute.
 960 struct __declspec(dllimport) DerivedFromExplicitlyImportSpecializedTemplate : public ExplicitlyImportSpecializedTemplate<int> {};
 961 USEMEMFUNC(ExplicitlyImportSpecializedTemplate<int>, func)
 962 // M32-DAG: declare dllimport x86_thiscallcc void @"?func@?$ExplicitlyImportSpecializedTemplate@H@@QAEXXZ"
 963 // G32-DAG: declare dllimport x86_thiscallcc void @_ZN35ExplicitlyImportSpecializedTemplateIiE4funcEv
 964
 965 // Base class already instantiated without dll attribute.
 966 struct __declspec(dllimport) DerivedFromExplicitlyInstantiatedTemplate : public ExplicitlyInstantiatedTemplate<int> {};
 967 USEMEMFUNC(ExplicitlyInstantiatedTemplate<int>, func)
 968 // M32-DAG: define weak_odr dso_local x86_thiscallcc void @"?func@?$ExplicitlyInstantiatedTemplate@H@@QAEXXZ"
 969 // G32-DAG: define weak_odr dso_local x86_thiscallcc void @_ZN30ExplicitlyInstantiatedTemplateIiE4funcEv
 970
 971 // Base class already instantiated with export attribute.
 972 struct __declspec(dllimport) DerivedFromExplicitlyExportInstantiatedTemplate : public ExplicitlyExportInstantiatedTemplate<int> {};
 973 USEMEMFUNC(ExplicitlyExportInstantiatedTemplate<int>, func)
 974 // M32-DAG: define weak_odr dso_local dllexport x86_thiscallcc void @"?func@?$ExplicitlyExportInstantiatedTemplate@H@@QAEXXZ"
 975 // G32-DAG: define weak_odr dso_local dllexport x86_thiscallcc void @_ZN36ExplicitlyExportInstantiatedTemplateIiE4funcEv
 976
 977 // Base class already instantiated with import attribute.
 978 struct __declspec(dllimport) DerivedFromExplicitlyImportInstantiatedTemplate : public ExplicitlyImportInstantiatedTemplate<int> {};
 979 USEMEMFUNC(ExplicitlyImportInstantiatedTemplate<int>, func)
 980 // M32-DAG: declare dllimport x86_thiscallcc void @"?func@?$ExplicitlyImportInstantiatedTemplate@H@@QAEXXZ"
 981 // G32-DAG: declare dllimport x86_thiscallcc void @_ZN36ExplicitlyImportInstantiatedTemplateIiE4funcEv
 982
 983 // MS: A dll attribute propagates through multiple levels of instantiation.
 984 template <typename T> struct TopClass { void func() {} };
 985 template <typename T> struct MiddleClass : public TopClass<T> { };
 986 struct __declspec(dllimport) BottomClass : public MiddleClass<int> { };
 987 USEMEMFUNC(TopClass<int>, func)
 988 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"?func@?$TopClass@H@@QAEXXZ"
 989 // G32-DAG: define linkonce_odr dso_local x86_thiscallcc void @_ZN8TopClassIiE4funcEv
 990
 991 template <typename T> struct ExplicitInstantiationDeclTemplateBase { void func() {} };
 992 extern template struct ExplicitInstantiationDeclTemplateBase<int>;
 993 struct __declspec(dllimport) DerivedFromExplicitInstantiationDeclTemplateBase : public ExplicitInstantiationDeclTemplateBase<int> {};
 994 template struct ExplicitInstantiationDeclTemplateBase<int>;
 995 USEMEMFUNC(ExplicitInstantiationDeclTemplateBase<int>, func)
 996 // M32-DAG: declare dllimport x86_thiscallcc void @"?func@?$ExplicitInstantiationDeclTemplateBase@H@@QAEXXZ"
 997 // G32-DAG: define weak_odr dso_local x86_thiscallcc void @_ZN37ExplicitInstantiationDeclTemplateBaseIiE4funcEv
 998
 999 template <typename T> struct ExplicitInstantiationDeclTemplateBase2 { void func() {} };
1000 extern template struct ExplicitInstantiationDeclTemplateBase2<int>;
1001 struct __declspec(dllimport) DerivedFromExplicitInstantiationDeclTemplateBase2 : public ExplicitInstantiationDeclTemplateBase2<int> {};
1002 template struct __declspec(dllexport) ExplicitInstantiationDeclTemplateBase2<int>;
1003 USEMEMFUNC(ExplicitInstantiationDeclTemplateBase2<int>, func)
1004 // M32-DAG: declare dllimport x86_thiscallcc void @"?func@?$ExplicitInstantiationDeclTemplateBase2@H@@QAEXXZ"
1005 // G32-DAG: define weak_odr dso_local x86_thiscallcc void @_ZN38ExplicitInstantiationDeclTemplateBase2IiE4funcEv
1006
1007 namespace pr39496 {
1008 // Make sure dll attribute are inherited by static locals also in template
1009 // specializations.
1010 template <typename> struct __declspec(dllimport) S { int foo() { static int x; return x++; } };
1011 int foo() { S<int> s; return s.foo(); }
1012 // MO1-DAG: @"?x@?{{1|2}}??foo@?$S@H@pr39496@@Q{{[A-Z]*}}HXZ@4HA" = available_externally dllimport global i32 0, align 4
1013
1014 template <typename> struct T { int foo() { static int x; return x++; } };
1015 extern template struct __declspec(dllimport) T<int>;
1016 int bar() { T<int> t; return t.foo(); }
1017 // MO1-DAG: @"?x@?{{1|2}}??foo@?$T@H@pr39496@@Q{{[A-Z]*}}HXZ@4HA" = available_externally dllimport global i32 0, align 4
1018
1019 template <typename T> struct __declspec(dllimport) U {
1020   void foo() {
1021     // Don't inherit dllimport to src before attaching the initializer.
1022     static constexpr char src[] = {"hello"};
1023     T arr[sizeof(src)];
1024   }
1025 };
1026 void baz() { U<int> u; u.foo(); } // No diagnostic.
1027
1028 }