1 // RUN: %clang_cc1 -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 -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 -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 -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 --check-prefix=G64 %s
5 // RUN: %clang_cc1 -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 -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 -triple i686-windows-gnu    -fno-rtti -fno-threadsafe-statics -fms-extensions -emit-llvm -std=c++1y -O1 -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 -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 -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 i32*
66 // M64-DAG: @"?GlobalRedecl2b@@3PEAHEA" = external dllimport global i32*
67 // GNU-DAG: @GlobalRedecl2b                = external dllimport global i32*
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
inlineStaticLocalsFunc()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 i32*] zeroinitializer
102 // GNU-DAG: @_ZZ18initializationFuncvE3arr = internal global [1 x i32*] zeroinitializer
initializationFunc()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(i8*)
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();
USE(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();
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();
inlineDef()241                inline void inlineDef() {}
USE(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() {}
USE(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();
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
friend3()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 noalias i8* @"??2@{{YAPAXI|YAPEAX_K}}@Z"(
312 // GNU-DAG: declare dllimport noalias i8* @_Znw{{[yj]}}(
313 __declspec(dllimport) void* operator new(__SIZE_TYPE__ n);
UNIQ(use)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 
ReferencingImportedVar()329 __declspec(dllimport) inline int ReferencingImportedVar() { return ImportedVar; }
330 // MO1-DAG: define available_externally dllimport i32 @"?ReferencingImportedVar@@YAHXZ"
ReferencingNonImportedVar()331 __declspec(dllimport) inline int ReferencingNonImportedVar() { return NonImportedVar; }
332 // MO1-DAG: declare dllimport i32 @"?ReferencingNonImportedVar@@YAHXZ"()
ReferencingImportedFunc()333 __declspec(dllimport) inline int ReferencingImportedFunc() { return ImportedFunc(); }
334 // MO1-DAG: define available_externally dllimport i32 @"?ReferencingImportedFunc@@YAHXZ"
ReferencingNonImportedFunc()335 __declspec(dllimport) inline int ReferencingNonImportedFunc() { return NonImportedFunc(); }
336 // MO1-DAG: declare dllimport i32 @"?ReferencingNonImportedFunc@@YAHXZ"()
ReferencingNonImportedMethod(ClassWithNonImportedMethod * x)337 __declspec(dllimport) inline int ReferencingNonImportedMethod(ClassWithNonImportedMethod *x) { return x->f(); }
338 // MO1-DAG: declare dllimport i32 @"?ReferencingNonImportedMethod
ReferencingClassMemberPtr(int (ClassWithNonImportedMethod::* p)(),ClassWithNonImportedMethod * x)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)
USE(ReferencingNonImportedVar)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.
ReferencingNonImportedNew()348 __declspec(dllimport) inline int *ReferencingNonImportedNew() { return new int[2]; }
349 // MO1-DAG: declare dllimport i32* @"?ReferencingNonImportedNew@@YAPAHXZ"
ReferencingNonImportedDelete()350 __declspec(dllimport) inline int *ReferencingNonImportedDelete() { delete (int*)nullptr; }
351 // MO1-DAG: declare dllimport i32* @"?ReferencingNonImportedDelete@@YAPAHXZ"
352 USE(ReferencingNonImportedNew)
353 USE(ReferencingNonImportedDelete)
354 __declspec(dllimport) void* operator new[](__SIZE_TYPE__);
355 __declspec(dllimport) void operator delete(void*);
ReferencingImportedNew()356 __declspec(dllimport) inline int *ReferencingImportedNew() { return new int[2]; }
357 // MO1-DAG: define available_externally dllimport i32* @"?ReferencingImportedNew@@YAPAHXZ"
ReferencingImportedDelete()358 __declspec(dllimport) inline int *ReferencingImportedDelete() { delete (int*)nullptr; }
359 // MO1-DAG: define available_externally dllimport i32* @"?ReferencingImportedDelete@@YAPAHXZ"
360 USE(ReferencingImportedNew)
361 USE(ReferencingImportedDelete)
~ClassWithDtorClassWithDtor362 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"(%struct.ClassWithNonDllImportBase*)
368 // MO1-DAG: declare dllimport x86_thiscallcc void @"??1ClassWithNonDllImportField@@QAE@XZ"(%struct.ClassWithNonDllImportField*)
369 struct ClassWithCtor { ClassWithCtor() {} };
370 struct __declspec(dllimport) ClassWithNonDllImportFieldWithCtor { ClassWithCtor t; };
371 USECLASS(ClassWithNonDllImportFieldWithCtor);
372 // MO1-DAG: declare dllimport x86_thiscallcc %struct.ClassWithNonDllImportFieldWithCtor* @"??0ClassWithNonDllImportFieldWithCtor@@QAE@XZ"(%struct.ClassWithNonDllImportFieldWithCtor* 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 
390 //===----------------------------------------------------------------------===//
391 // Function templates
392 //===----------------------------------------------------------------------===//
393 
394 // Import function template declaration.
395 // MSC-DAG: declare dllimport void @"??$funcTmplDecl@UImplicitInst_Imported@@@@YAXXZ"()
396 // GNU-DAG: declare dllimport void @_Z12funcTmplDeclI21ImplicitInst_ImportedEvv()
397 template<typename T> __declspec(dllimport) void funcTmplDecl();
398 USE(funcTmplDecl<ImplicitInst_Imported>)
399 
400 // Function template definitions cannot be imported.
401 
402 // Import inline function template.
403 // MSC-DAG: declare dllimport void @"??$inlineFuncTmpl1@UImplicitInst_Imported@@@@YAXXZ"()
404 // GNU-DAG: define linkonce_odr dso_local void @_Z15inlineFuncTmpl1I21ImplicitInst_ImportedEvv()
405 // MO1-DAG: define available_externally dllimport void @"??$inlineFuncTmpl1@UImplicitInst_Imported@@@@YAXXZ"()
406 // GO1-DAG: define linkonce_odr dso_local void @_Z15inlineFuncTmpl1I21ImplicitInst_ImportedEvv()
407 template<typename T> __declspec(dllimport) inline void inlineFuncTmpl1() {}
408 USE(inlineFuncTmpl1<ImplicitInst_Imported>)
409 
410 // MSC-DAG: declare dllimport void @"??$inlineFuncTmpl2@UImplicitInst_Imported@@@@YAXXZ"()
411 // GNU-DAG: define linkonce_odr dso_local void @_Z15inlineFuncTmpl2I21ImplicitInst_ImportedEvv()
412 // MO1-DAG: define available_externally dllimport void @"??$inlineFuncTmpl2@UImplicitInst_Imported@@@@YAXXZ"()
413 // GO1-DAG: define linkonce_odr dso_local void @_Z15inlineFuncTmpl2I21ImplicitInst_ImportedEvv()
414 template<typename T> inline void __attribute__((dllimport)) inlineFuncTmpl2() {}
415 USE(inlineFuncTmpl2<ImplicitInst_Imported>)
416 
417 // MSC-DAG: define linkonce_odr dso_local void @"??$inlineFuncTmplDecl@UImplicitInst_Imported@@@@YAXXZ"()
418 // GNU-DAG: define linkonce_odr dso_local void @_Z18inlineFuncTmplDeclI21ImplicitInst_ImportedEvv()
419 // MO1-DAG: define linkonce_odr dso_local void @"??$inlineFuncTmplDecl@UImplicitInst_Imported@@@@YAXXZ"()
420 // GO1-DAG: define linkonce_odr dso_local void @_Z18inlineFuncTmplDeclI21ImplicitInst_ImportedEvv()
421 template<typename T> __declspec(dllimport) inline void inlineFuncTmplDecl();
422 template<typename T>                              void inlineFuncTmplDecl() {}
423 USE(inlineFuncTmplDecl<ImplicitInst_Imported>)
424 
425 // MSC-DAG: define linkonce_odr dso_local void @"??$inlineFuncTmplDef@UImplicitInst_Imported@@@@YAXXZ"()
426 // GNU-DAG: define linkonce_odr dso_local void @_Z17inlineFuncTmplDefI21ImplicitInst_ImportedEvv()
427 // MO1-DAG: define linkonce_odr dso_local void @"??$inlineFuncTmplDef@UImplicitInst_Imported@@@@YAXXZ"()
428 // GO1-DAG: define linkonce_odr dso_local void @_Z17inlineFuncTmplDefI21ImplicitInst_ImportedEvv()
429 template<typename T> __declspec(dllimport) void inlineFuncTmplDef();
430 template<typename T>                inline void inlineFuncTmplDef() {}
431 USE(inlineFuncTmplDef<ImplicitInst_Imported>)
432 
433 
434 // Redeclarations
435 // MSC-DAG: declare dllimport void @"??$funcTmplRedecl1@UImplicitInst_Imported@@@@YAXXZ"()
436 // GNU-DAG: declare dllimport void @_Z15funcTmplRedecl1I21ImplicitInst_ImportedEvv()
437 template<typename T> __declspec(dllimport) void funcTmplRedecl1();
438 template<typename T> __declspec(dllimport) void funcTmplRedecl1();
439 USE(funcTmplRedecl1<ImplicitInst_Imported>)
440 
441 // MSC-DAG: declare dso_local void @"??$funcTmplRedecl2@UImplicitInst_NotImported@@@@YAXXZ"()
442 // GNU-DAG: declare dso_local void @_Z15funcTmplRedecl2I24ImplicitInst_NotImportedEvv()
443 template<typename T> __declspec(dllimport) void funcTmplRedecl2();
444 template<typename T>                       void funcTmplRedecl2(); // dllimport ignored
445 USE(funcTmplRedecl2<ImplicitInst_NotImported>)
446 
447 // MSC-DAG: define linkonce_odr dso_local void @"??$funcTmplRedecl3@UImplicitInst_NotImported@@@@YAXXZ"()
448 // GNU-DAG: define linkonce_odr dso_local void @_Z15funcTmplRedecl3I24ImplicitInst_NotImportedEvv()
449 template<typename T> __declspec(dllimport) void funcTmplRedecl3();
450 template<typename T>                       void funcTmplRedecl3() {} // dllimport ignored
451 USE(funcTmplRedecl3<ImplicitInst_NotImported>)
452 
453 
454 // Function template friends
455 // MSC-DAG: declare dllimport   void @"??$funcTmplFriend1@UImplicitInst_Imported@@@@YAXXZ"()
456 // GNU-DAG: declare dllimport   void @_Z15funcTmplFriend1I21ImplicitInst_ImportedEvv()
457 // MSC-DAG: declare             dso_local void @"??$funcTmplFriend2@UImplicitInst_NotImported@@@@YAXXZ"()
458 // GNU-DAG: declare             dso_local void @_Z15funcTmplFriend2I24ImplicitInst_NotImportedEvv()
459 // MSC-DAG: define linkonce_odr dso_local void @"??$funcTmplFriend3@UImplicitInst_NotImported@@@@YAXXZ"()
460 // GNU-DAG: define linkonce_odr dso_local void @_Z15funcTmplFriend3I24ImplicitInst_NotImportedEvv()
461 // MSC-DAG: define linkonce_odr dso_local void @"??$funcTmplFriend4@UImplicitInst_Imported@@@@YAXXZ"()
462 // GNU-DAG: define linkonce_odr dso_local void @_Z15funcTmplFriend4I21ImplicitInst_ImportedEvv()
463 struct FuncTmplFriend {
464   template<typename T> friend __declspec(dllimport) void funcTmplFriend1();
465   template<typename T> friend __declspec(dllimport) void funcTmplFriend2();
466   template<typename T> friend __declspec(dllimport) void funcTmplFriend3();
467   template<typename T> friend __declspec(dllimport) inline void funcTmplFriend4();
468 };
469 template<typename T> __declspec(dllimport) void funcTmplFriend1();
470 template<typename T>                       void funcTmplFriend2(); // dllimport ignored
471 template<typename T>                       void funcTmplFriend3() {} // dllimport ignored
472 template<typename T>                       inline void funcTmplFriend4() {}
473 USE(funcTmplFriend1<ImplicitInst_Imported>)
474 USE(funcTmplFriend2<ImplicitInst_NotImported>)
475 USE(funcTmplFriend3<ImplicitInst_NotImported>)
476 USE(funcTmplFriend4<ImplicitInst_Imported>)
477 
478 // MSC-DAG: declare dllimport void @"??$externalFuncTmpl@UImplicitInst_Imported@@@ns@@YAXXZ"()
479 // GNU-DAG: declare dllimport void @_ZN2ns16externalFuncTmplI21ImplicitInst_ImportedEEvv()
480 namespace ns { template<typename T> __declspec(dllimport) void externalFuncTmpl(); }
481 USE(ns::externalFuncTmpl<ImplicitInst_Imported>)
482 
483 
484 template<typename T> void funcTmpl() {}
485 template<typename T> inline void inlineFuncTmpl() {}
486 template<typename T> __declspec(dllimport) void importedFuncTmplDecl();
487 template<typename T> __declspec(dllimport) inline void importedFuncTmpl() {}
488 
489 // Import implicit instantiation of an imported function template.
490 // MSC-DAG: declare dllimport void @"??$importedFuncTmplDecl@UImplicitInst_Imported@@@@YAXXZ"()
491 // GNU-DAG: declare dllimport void @_Z20importedFuncTmplDeclI21ImplicitInst_ImportedEvv()
492 USE(importedFuncTmplDecl<ImplicitInst_Imported>)
493 
494 // MSC-DAG: declare dllimport void @"??$importedFuncTmpl@UImplicitInst_Imported@@@@YAXXZ"()
495 // GNU-DAG: define linkonce_odr dso_local void @_Z16importedFuncTmplI21ImplicitInst_ImportedEvv()
496 // MO1-DAG: define available_externally dllimport void @"??$importedFuncTmpl@UImplicitInst_Imported@@@@YAXXZ"()
497 // GO1-DAG: define linkonce_odr dso_local void @_Z16importedFuncTmplI21ImplicitInst_ImportedEvv()
498 USE(importedFuncTmpl<ImplicitInst_Imported>)
499 
500 // Import explicit instantiation declaration of an imported function template.
501 // MSC-DAG: declare dllimport void @"??$importedFuncTmpl@UExplicitDecl_Imported@@@@YAXXZ"()
502 // GNU-DAG: declare dso_local void @_Z16importedFuncTmplI21ExplicitDecl_ImportedEvv()
503 // MO1-DAG: define available_externally dllimport void @"??$importedFuncTmpl@UExplicitDecl_Imported@@@@YAXXZ"()
504 // GO1-DAG: define available_externally dso_local void @_Z16importedFuncTmplI21ExplicitDecl_ImportedEvv()
505 extern template void importedFuncTmpl<ExplicitDecl_Imported>();
506 USE(importedFuncTmpl<ExplicitDecl_Imported>)
507 
508 // Import explicit instantiation definition of an imported function template.
509 // MSC-DAG: declare dllimport void @"??$importedFuncTmpl@UExplicitInst_Imported@@@@YAXXZ"()
510 // GNU-DAG: define weak_odr dso_local void @_Z16importedFuncTmplI21ExplicitInst_ImportedEvv()
511 // MO1-DAG: define available_externally dllimport void @"??$importedFuncTmpl@UExplicitInst_Imported@@@@YAXXZ"()
512 // GO1-DAG: define weak_odr dso_local void @_Z16importedFuncTmplI21ExplicitInst_ImportedEvv()
513 template void importedFuncTmpl<ExplicitInst_Imported>();
514 USE(importedFuncTmpl<ExplicitInst_Imported>)
515 
516 
517 // Import specialization of an imported function template.
518 // MSC-DAG: declare dllimport void @"??$importedFuncTmplDecl@UExplicitSpec_Imported@@@@YAXXZ"()
519 // GNU-DAG: declare dllimport void @_Z20importedFuncTmplDeclI21ExplicitSpec_ImportedEvv()
520 template<> __declspec(dllimport) void importedFuncTmplDecl<ExplicitSpec_Imported>();
521 USE(importedFuncTmplDecl<ExplicitSpec_Imported>)
522 
523 // MSC-DAG-FIXME: declare dllimport void @"??$importedFuncTmplDecl@UExplicitSpec_Def_Imported@@@@YAXXZ"()
524 // MO1-DAG-FIXME: define available_externally dllimport void @"??$importedFuncTmplDecl@UExplicitSpec_Def_Imported@@@@YAXXZ"()
525 #ifdef MSABI
526 //template<> __declspec(dllimport) void importedFuncTmplDecl<ExplicitSpec_Def_Imported>() {}
527 //USE(importedFuncTmplDecl<ExplicitSpec_Def_Imported>)
528 #endif
529 
530 // MSC-DAG: declare dllimport void @"??$importedFuncTmplDecl@UExplicitSpec_InlineDef_Imported@@@@YAXXZ"()
531 // GNU-DAG: define linkonce_odr dso_local void @_Z20importedFuncTmplDeclI31ExplicitSpec_InlineDef_ImportedEvv()
532 // MO1-DAG: define available_externally dllimport void @"??$importedFuncTmplDecl@UExplicitSpec_InlineDef_Imported@@@@YAXXZ"()
533 // GO1-DAG: define linkonce_odr dso_local void @_Z20importedFuncTmplDeclI31ExplicitSpec_InlineDef_ImportedEvv()
534 template<> __declspec(dllimport) inline void importedFuncTmplDecl<ExplicitSpec_InlineDef_Imported>() {}
535 USE(importedFuncTmplDecl<ExplicitSpec_InlineDef_Imported>)
536 
537 
538 // MSC-DAG: declare dllimport void @"??$importedFuncTmpl@UExplicitSpec_Imported@@@@YAXXZ"()
539 // GNU-DAG: declare dllimport void @_Z16importedFuncTmplI21ExplicitSpec_ImportedEvv()
540 template<> __declspec(dllimport) void importedFuncTmpl<ExplicitSpec_Imported>();
541 USE(importedFuncTmpl<ExplicitSpec_Imported>)
542 
543 // MSC-DAG-FIXME: declare dllimport void @"??$importedFuncTmpl@UExplicitSpec_Def_Imported@@@@YAXXZ"()
544 // MO1-DAG-FIXME: define available_externally dllimport void @"??$importedFuncTmpl@UExplicitSpec_Def_Imported@@@@YAXXZ"()
545 #ifdef MSABI
546 //template<> __declspec(dllimport) void importedFuncTmpl<ExplicitSpec_Def_Imported>() {}
547 //USE(importedFuncTmpl<ExplicitSpec_Def_Imported>)
548 #endif
549 
550 // MSC-DAG: declare dllimport void @"??$importedFuncTmpl@UExplicitSpec_InlineDef_Imported@@@@YAXXZ"()
551 // GNU-DAG: define linkonce_odr dso_local void @_Z16importedFuncTmplI31ExplicitSpec_InlineDef_ImportedEvv()
552 // MO1-DAG: define available_externally dllimport void @"??$importedFuncTmpl@UExplicitSpec_InlineDef_Imported@@@@YAXXZ"()
553 // GO1-DAG: define linkonce_odr dso_local void @_Z16importedFuncTmplI31ExplicitSpec_InlineDef_ImportedEvv()
554 template<> __declspec(dllimport) inline void importedFuncTmpl<ExplicitSpec_InlineDef_Imported>() {}
555 USE(importedFuncTmpl<ExplicitSpec_InlineDef_Imported>)
556 
557 
558 // Not importing specialization of an imported function template without
559 // explicit dllimport.
560 // MSC-DAG: define dso_local void @"??$importedFuncTmpl@UExplicitSpec_NotImported@@@@YAXXZ"()
561 // GNU-DAG: define dso_local void @_Z16importedFuncTmplI24ExplicitSpec_NotImportedEvv()
562 template<> void importedFuncTmpl<ExplicitSpec_NotImported>() {}
563 USE(importedFuncTmpl<ExplicitSpec_NotImported>)
564 
565 
566 // Import explicit instantiation declaration of a non-imported function template.
567 // MSC-DAG: declare dllimport void @"??$funcTmpl@UExplicitDecl_Imported@@@@YAXXZ"()
568 // MSC-DAG: declare dllimport void @"??$inlineFuncTmpl@UExplicitDecl_Imported@@@@YAXXZ"()
569 // GNU-DAG: declare dllimport void @_Z8funcTmplI21ExplicitDecl_ImportedEvv()
570 // GNU-DAG: declare dso_local void @_Z14inlineFuncTmplI21ExplicitDecl_ImportedEvv()
571 // MO1-DAG: define available_externally dllimport void @"??$inlineFuncTmpl@UExplicitDecl_Imported@@@@YAXXZ"()
572 // GO1-DAG: define available_externally dso_local void @_Z14inlineFuncTmplI21ExplicitDecl_ImportedEvv()
573 extern template __declspec(dllimport) void funcTmpl<ExplicitDecl_Imported>();
574 extern template __declspec(dllimport) void inlineFuncTmpl<ExplicitDecl_Imported>();
575 USE(funcTmpl<ExplicitDecl_Imported>)
576 USE(inlineFuncTmpl<ExplicitDecl_Imported>)
577 
578 
579 // Import explicit instantiation definition of a non-imported function template.
580 // MSC-DAG: declare dllimport void @"??$funcTmpl@UExplicitInst_Imported@@@@YAXXZ"()
581 // MSC-DAG: declare dllimport void @"??$inlineFuncTmpl@UExplicitInst_Imported@@@@YAXXZ"()
582 // GNU-DAG: declare dllimport void @_Z8funcTmplI21ExplicitInst_ImportedEvv()
583 // GNU-DAG: define weak_odr dso_local void @_Z14inlineFuncTmplI21ExplicitInst_ImportedEvv()
584 // MO1-DAG: declare dllimport void @"??$funcTmpl@UExplicitInst_Imported@@@@YAXXZ"()
585 // MO1-DAG: define available_externally dllimport void @"??$inlineFuncTmpl@UExplicitInst_Imported@@@@YAXXZ"()
586 // GO1-DAG: define available_externally dllimport void @_Z8funcTmplI21ExplicitInst_ImportedEvv()
587 // GO1-DAG: define weak_odr dso_local void @_Z14inlineFuncTmplI21ExplicitInst_ImportedEvv()
588 template __declspec(dllimport) void funcTmpl<ExplicitInst_Imported>();
589 template __declspec(dllimport) void inlineFuncTmpl<ExplicitInst_Imported>();
590 USE(funcTmpl<ExplicitInst_Imported>)
591 USE(inlineFuncTmpl<ExplicitInst_Imported>)
592 
593 
594 // Import specialization of a non-imported function template.
595 // MSC-DAG: declare dllimport void @"??$funcTmpl@UExplicitSpec_Imported@@@@YAXXZ"()
596 // GNU-DAG: declare dllimport void @_Z8funcTmplI21ExplicitSpec_ImportedEvv()
597 template<> __declspec(dllimport) void funcTmpl<ExplicitSpec_Imported>();
598 USE(funcTmpl<ExplicitSpec_Imported>)
599 
600 // MSC-DAG-FIXME: declare dllimport void @"??$funcTmpl@UExplicitSpec_Def_Imported@@@@YAXXZ"()
601 // MO1-DAG-FIXME: define available_externally dllimport void @"??$funcTmpl@UExplicitSpec_Def_Imported@@@@YAXXZ"()
602 #ifdef MSABI
603 //template<> __declspec(dllimport) void funcTmpl<ExplicitSpec_Def_Imported>() {}
604 //USE(funcTmpl<ExplicitSpec_Def_Imported>)
605 #endif
606 
607 // MSC-DAG: declare dllimport void @"??$funcTmpl@UExplicitSpec_InlineDef_Imported@@@@YAXXZ"()
608 // GNU-DAG: define linkonce_odr dso_local void @_Z8funcTmplI31ExplicitSpec_InlineDef_ImportedEvv()
609 // MO1-DAG: define available_externally dllimport void @"??$funcTmpl@UExplicitSpec_InlineDef_Imported@@@@YAXXZ"()
610 // GO1-DAG: define linkonce_odr dso_local void @_Z8funcTmplI31ExplicitSpec_InlineDef_ImportedEvv()
611 template<> __declspec(dllimport) inline void funcTmpl<ExplicitSpec_InlineDef_Imported>() {}
612 USE(funcTmpl<ExplicitSpec_InlineDef_Imported>)
613 
614 #ifdef MSABI
615 namespace pr35435 {
616 struct X;
617 template <typename T> struct __declspec(dllimport) S {
618   void foo(T *t) { t->problem(); }
619 };
620 template void S<X>::foo(X*); // Cannot be instantiated because X is incomplete; dllimport means it's treated as an instantiation decl.
621 }
622 #endif
623 
624 
625 //===----------------------------------------------------------------------===//
626 // Classes
627 //===----------------------------------------------------------------------===//
628 
629 struct __declspec(dllimport) T {
630   void a() {}
631   // MO1-DAG: define available_externally dllimport x86_thiscallcc void @"?a@T@@QAEXXZ"
632 
633   static void StaticMethod();
634   // MSC-DAG: declare dllimport void @"?StaticMethod@T@@SAXXZ"()
635   // GNU-DAG: declare dllimport void @_ZN1T12StaticMethodEv()
636 
637   static int b;
638   // MO1-DAG: @"?b@T@@2HA" = external dllimport global i32
639 
640   T& operator=(T&) = default;
641   // MO1-DAG: define available_externally dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.T* @"??4T@@QAEAAU0@AAU0@@Z"
642 
643   T& operator=(T&&) = default;
644   // Note: Don't mark inline move operators dllimport because current MSVC versions don't export them.
645   // M18-DAG: define linkonce_odr dso_local x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.T* @"??4T@@QAEAAU0@$$QAU0@@Z"
646   // M19-DAG: define available_externally dllimport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.T* @"??4T@@QAEAAU0@$$QAU0@@Z"
647 };
648 USEMEMFUNC(T, a)
649 USESTATICMEMFUNC(T, StaticMethod)
650 USEVAR(T::b)
651 USECOPYASSIGN(T)
652 USEMOVEASSIGN(T)
653 
654 template <typename T> struct __declspec(dllimport) U { void foo() {} };
655 // MO1-DAG: define available_externally dllimport x86_thiscallcc void @"?foo@?$U@H@@QAEXXZ"
656 struct __declspec(dllimport) V : public U<int> { };
657 USEMEMFUNC(V, foo)
658 
659 struct __declspec(dllimport) W { virtual void foo() {} };
660 USECLASS(W)
661 // vftable:
662 // MO1-DAG: @"??_SW@@6B@" = linkonce_odr unnamed_addr constant { [1 x i8*] } { [1 x i8*] [i8* bitcast (void (%struct.W*)* @"?foo@W@@UAEXXZ" to i8*)] }
663 // GO1-DAG: @_ZTV1W = available_externally dllimport unnamed_addr constant { [3 x i8*] } { [3 x i8*] [i8* null, i8* null, i8* bitcast (void (%struct.W*)* @_ZN1W3fooEv to i8*)] }
664 
665 struct __declspec(dllimport) KeyFuncClass {
666   constexpr KeyFuncClass() {}
667   virtual void foo();
668 };
669 extern constexpr KeyFuncClass keyFuncClassVar = {};
670 // G32-DAG: @_ZTV12KeyFuncClass = external dllimport unnamed_addr constant { [3 x i8*] }
671 
672 struct __declspec(dllimport) X : public virtual W {};
673 USECLASS(X)
674 // vbtable:
675 // MO1-DAG: @"??_8X@@7B@" = available_externally dllimport unnamed_addr constant [2 x i32] [i32 0, i32 4]
676 
677 struct __declspec(dllimport) Y {
678   int x;
679 };
680 
681 struct __declspec(dllimport) Z { virtual ~Z() {} };
682 USECLASS(Z)
683 // User-defined dtor:
684 // MO1-DAG: define available_externally dllimport x86_thiscallcc void @"??1Z@@UAE@XZ"
685 
686 namespace DontUseDtorAlias {
687   struct __declspec(dllimport) A { ~A(); };
688   struct __declspec(dllimport) B : A { ~B(); };
689   inline A::~A() { }
690   inline B::~B() { }
691   // Emit a real definition of B's constructor; don't alias it to A's.
692   // MO1-DAG: available_externally dllimport x86_thiscallcc void @"??1B@DontUseDtorAlias@@QAE@XZ"
693   USECLASS(B)
694 }
695 
696 namespace Vtordisp {
697   // Don't dllimport the vtordisp.
698   // MO1-DAG: define linkonce_odr dso_local x86_thiscallcc void @"?f@?$C@H@Vtordisp@@$4PPPPPPPM@A@AEXXZ"
699 
700   class __declspec(dllimport) Base {
701     virtual void f() {}
702   };
703   template <typename T>
704   class __declspec(dllimport) C : virtual public Base {
705   public:
706     C() {}
707     virtual void f() {}
708   };
709   USECLASS(C<int>);
710 }
711 
712 namespace ClassTemplateStaticDef {
713   // Regular template static field:
714   template <typename T> struct __declspec(dllimport) S {
715     static int x;
716   };
717   template <typename T> int S<T>::x;
718   // MSC-DAG: @"?x@?$S@H@ClassTemplateStaticDef@@2HA" = external dllimport global i32
719   int f() { return S<int>::x; }
720 
721   // Partial class template specialization static field:
722   template <typename A> struct T;
723   template <typename A> struct __declspec(dllimport) T<A*> {
724     static int x;
725   };
726   template <typename A> int T<A*>::x;
727   // GNU-DAG: @_ZN22ClassTemplateStaticDef1TIPvE1xE = external dllimport global i32
728   int g() { return T<void*>::x; }
729 }
730 
731 namespace PR19933 {
732 // Don't dynamically initialize dllimport vars.
733 // MSC2-NOT: @llvm.global_ctors
734 // GNU2-NOT: @llvm.global_ctors
735 
736   struct NonPOD { NonPOD(); };
737   template <typename T> struct A { static NonPOD x; };
738   template <typename T> NonPOD A<T>::x;
739   template struct __declspec(dllimport) A<int>;
740   USEVARTYPE(NonPOD, A<int>::x);
741   // MSC-DAG: @"?x@?$A@H@PR19933@@2UNonPOD@2@A" = external dllimport global %"struct.PR19933::NonPOD"
742 
743   int f();
744   template <typename T> struct B { static int x; };
745   template <typename T> int B<T>::x = f();
746   template struct __declspec(dllimport) B<int>;
747   USEVAR(B<int>::x);
748   // MSC-DAG: @"?x@?$B@H@PR19933@@2HA" = external dllimport global i32
749 
750   constexpr int g() { return 42; }
751   template <typename T> struct C { static int x; };
752   template <typename T> int C<T>::x = g();
753   template struct __declspec(dllimport) C<int>;
754   USEVAR(C<int>::x);
755   // MSC-DAG: @"?x@?$C@H@PR19933@@2HA" = external dllimport global i32
756 
757   template <int I> struct D { static int x, y; };
758   template <int I> int D<I>::x = I + 1;
759   template <int I> int D<I>::y = I + f();
760   template struct __declspec(dllimport) D<42>;
761   USEVAR(D<42>::x);
762   USEVAR(D<42>::y);
763   // MSC-DAG: @"?x@?$D@$0CK@@PR19933@@2HA" = external dllimport global i32
764   // MSC-DAG: @"?y@?$D@$0CK@@PR19933@@2HA" = external dllimport global i32
765 }
766 
767 namespace PR21355 {
768   struct __declspec(dllimport) S {
769     virtual ~S();
770   };
771   S::~S() {}
772 
773   // S::~S is a key function, so we would ordinarily emit a strong definition for
774   // the vtable. However, S is imported, so the vtable should be too.
775 
776   // GNU-DAG: @_ZTVN7PR213551SE = available_externally dllimport unnamed_addr constant { [4 x i8*] }
777 }
778 
779 namespace PR21366 {
780   struct __declspec(dllimport) S {
781     void outOfLineMethod();
782     void inlineMethod() {}
783     inline void anotherInlineMethod();
784     void outOfClassInlineMethod();
785   };
786   void S::anotherInlineMethod() {}
787   inline void S::outOfClassInlineMethod() {}
788 }
789 
790 namespace PR27319 {
791   // Make sure we don't assert due to not having checked for operator delete on
792   // the destructor.
793   template <typename> struct A {
794     virtual ~A() = default;
795   };
796   extern template struct __declspec(dllimport) A<int>;
797   void f() { new A<int>(); }
798   // MO1-DAG: @"??_S?$A@H@PR27319@@6B@" = linkonce_odr unnamed_addr constant { [1 x i8*] }
799 }
800 
801 // MS ignores DLL attributes on partial specializations.
802 template <typename T> struct PartiallySpecializedClassTemplate {};
803 template <typename T> struct __declspec(dllimport) PartiallySpecializedClassTemplate<T*> { void f(); };
804 USEMEMFUNC(PartiallySpecializedClassTemplate<void*>, f);
805 // M32-DAG: declare dso_local x86_thiscallcc void @"?f@?$PartiallySpecializedClassTemplate@PAX@@QAEXXZ"
806 // G32-DAG: declare dllimport x86_thiscallcc void @_ZN33PartiallySpecializedClassTemplateIPvE1fEv
807 
808 // Attributes on explicit specializations are honored.
809 template <typename T> struct ExplicitlySpecializedClassTemplate {};
810 template <> struct __declspec(dllimport) ExplicitlySpecializedClassTemplate<void*> { void f(); };
811 USEMEMFUNC(ExplicitlySpecializedClassTemplate<void*>, f);
812 // M32-DAG: declare dllimport x86_thiscallcc void @"?f@?$ExplicitlySpecializedClassTemplate@PAX@@QAEXXZ"
813 // G32-DAG: declare dllimport x86_thiscallcc void @_ZN34ExplicitlySpecializedClassTemplateIPvE1fEv
814 
815 // MS inherits DLL attributes to partial specializations.
816 template <typename T> struct __declspec(dllimport) PartiallySpecializedImportedClassTemplate {};
817 template <typename T> struct PartiallySpecializedImportedClassTemplate<T*> { void f() {} };
818 USEMEMFUNC(PartiallySpecializedImportedClassTemplate<void*>, f);
819 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"?f@?$PartiallySpecializedImportedClassTemplate@PAX@@QAEXXZ"
820 // G32-DAG: define linkonce_odr dso_local x86_thiscallcc void @_ZN41PartiallySpecializedImportedClassTemplateIPvE1fEv
821 
822 // Attributes on the instantiation take precedence over attributes on the template.
823 template <typename T> struct __declspec(dllexport) ExplicitlyInstantiatedWithDifferentAttr { void f() {} };
824 template struct __declspec(dllimport) ExplicitlyInstantiatedWithDifferentAttr<int>;
825 USEMEMFUNC(ExplicitlyInstantiatedWithDifferentAttr<int>, f);
826 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"?f@?$ExplicitlyInstantiatedWithDifferentAttr@H@@QAEXXZ"
827 
828 template <typename T> struct ExplicitInstantiationDeclImportedDefTemplate { void f() {} ExplicitInstantiationDeclImportedDefTemplate() {}};
829 extern template struct ExplicitInstantiationDeclImportedDefTemplate<int>;
830 template struct __declspec(dllimport) ExplicitInstantiationDeclImportedDefTemplate<int>;
831 USECLASS(ExplicitInstantiationDeclImportedDefTemplate<int>);
832 USEMEMFUNC(ExplicitInstantiationDeclImportedDefTemplate<int>, f);
833 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"?f@?$ExplicitInstantiationDeclImportedDefTemplate@H@@QAEXXZ"
834 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc %struct.ExplicitInstantiationDeclImportedDefTemplate* @"??0?$ExplicitInstantiationDeclImportedDefTemplate@H@@QAE@XZ"
835 // G32-DAG: define weak_odr dso_local x86_thiscallcc void @_ZN44ExplicitInstantiationDeclImportedDefTemplateIiE1fEv
836 
837 template <typename T> struct __declspec(dllimport) ExplicitInstantiationDeclExportedDefImportedTemplate { void f() {} ExplicitInstantiationDeclExportedDefImportedTemplate() {} };
838 extern template struct __declspec(dllimport) ExplicitInstantiationDeclExportedDefImportedTemplate <int>;
839 template struct __declspec(dllexport) ExplicitInstantiationDeclExportedDefImportedTemplate<int>;
840 USECLASS(ExplicitInstantiationDeclExportedDefImportedTemplate<int>);
841 USEMEMFUNC(ExplicitInstantiationDeclExportedDefImportedTemplate<int>, f);
842 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"?f@?$ExplicitInstantiationDeclExportedDefImportedTemplate@H@@QAEXXZ"
843 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc %struct.ExplicitInstantiationDeclExportedDefImportedTemplate* @"??0?$ExplicitInstantiationDeclExportedDefImportedTemplate@H@@QAE@XZ"
844 
845 template <typename T> struct PR23770BaseTemplate { void f() {} };
846 template <typename T> struct PR23770DerivedTemplate : PR23770BaseTemplate<int> {};
847 extern template struct PR23770DerivedTemplate<int>;
848 template struct __declspec(dllimport) PR23770DerivedTemplate<int>;
849 USEMEMFUNC(PR23770BaseTemplate<int>, f);
850 // M32-DAG: declare dllimport x86_thiscallcc void @"?f@?$PR23770BaseTemplate@H@@QAEXXZ"
851 
852 namespace PR27810 {
853   template <class T>
854   struct basic_ostream {
855     struct sentry {
856       sentry() { }
857       void foo() { }
858     };
859   };
860   template class __declspec(dllimport) basic_ostream<char>;
861   // The explicit instantiation definition acts as an explicit instantiation
862   // *declaration*, dllimport is not inherited by the inner class, and no
863   // functions are emitted unless they are used.
864 
865   USEMEMFUNC(basic_ostream<char>::sentry, foo);
866   // M32-DAG: define linkonce_odr dso_local x86_thiscallcc void @"?foo@sentry@?$basic_ostream@D@PR27810@@QAEXXZ"
867   // M32-NOT: ??0sentry@?$basic_ostream@D@PR27810@@QAE@XZ
868 }
869 
870 namespace PR27811 {
871   template <class T> struct codecvt {
872     virtual ~codecvt() { }
873   };
874   template class __declspec(dllimport) codecvt<char>;
875 
876   // dllimport means this explicit instantiation definition gets treated as a
877   // declaration. Thus, the vtable should not be marked used, and in fact
878   // nothing for this class should be emitted at all since it's not used.
879   // M32-NOT: codecvt
880 }
881 
882 //===----------------------------------------------------------------------===//
883 // Classes with template base classes
884 //===----------------------------------------------------------------------===//
885 
886 template <typename T> struct ClassTemplate { void func() {} };
887 template <typename T> struct __declspec(dllexport) ExportedClassTemplate { void func(); };
888 template <typename T> void ExportedClassTemplate<T>::func() {}
889 template <typename T> struct __declspec(dllimport) ImportedClassTemplate { void func(); };
890 
891 template <typename T> struct ExplicitlySpecializedTemplate { void func() {} };
892 template <> struct ExplicitlySpecializedTemplate<int> { void func() {} };
893 template <typename T> struct ExplicitlyExportSpecializedTemplate { void func() {} };
894 template <> struct __declspec(dllexport) ExplicitlyExportSpecializedTemplate<int> { void func(); };
895 void ExplicitlyExportSpecializedTemplate<int>::func() {}
896 template <typename T> struct ExplicitlyImportSpecializedTemplate { void func() {} };
897 template <> struct __declspec(dllimport) ExplicitlyImportSpecializedTemplate<int> { void func(); };
898 
899 template <typename T> struct ExplicitlyInstantiatedTemplate { void func() {} };
900 template struct ExplicitlyInstantiatedTemplate<int>;
901 template <typename T> struct ExplicitlyExportInstantiatedTemplate { void func(); };
902 template <typename T> void ExplicitlyExportInstantiatedTemplate<T>::func() {}
903 template struct __declspec(dllexport) ExplicitlyExportInstantiatedTemplate<int>;
904 template <typename T> struct ExplicitlyImportInstantiatedTemplate { void func(); };
905 template struct __declspec(dllimport) ExplicitlyImportInstantiatedTemplate<int>;
906 
907 
908 // MS: ClassTemplate<int> gets imported.
909 struct __declspec(dllimport) DerivedFromTemplate : public ClassTemplate<int> {};
910 USEMEMFUNC(ClassTemplate<int>, func)
911 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"?func@?$ClassTemplate@H@@QAEXXZ"
912 // G32-DAG: define linkonce_odr dso_local x86_thiscallcc void @_ZN13ClassTemplateIiE4funcEv
913 
914 // ImportedTemplate is explicitly imported.
915 struct __declspec(dllimport) DerivedFromImportedTemplate : public ImportedClassTemplate<int> {};
916 USEMEMFUNC(ImportedClassTemplate<int>, func)
917 // M32-DAG: declare dllimport x86_thiscallcc void @"?func@?$ImportedClassTemplate@H@@QAEXXZ"
918 // G32-DAG: declare dllimport x86_thiscallcc void @_ZN21ImportedClassTemplateIiE4funcEv
919 
920 // ExportedTemplate is explicitly exported.
921 struct __declspec(dllimport) DerivedFromExportedTemplate : public ExportedClassTemplate<int> {};
922 USEMEMFUNC(ExportedClassTemplate<int>, func)
923 // M32-DAG: define weak_odr dso_local dllexport x86_thiscallcc void @"?func@?$ExportedClassTemplate@H@@QAEXXZ"
924 // G32-DAG: define weak_odr dso_local dllexport x86_thiscallcc void @_ZN21ExportedClassTemplateIiE4funcEv
925 
926 // Base class already implicitly instantiated without attribute.
927 struct DerivedFromTemplateD : public ClassTemplate<double> {};
928 struct __declspec(dllimport) DerivedFromTemplateD2 : public ClassTemplate<double> {};
929 USEMEMFUNC(ClassTemplate<double>, func)
930 // M32-DAG: declare dllimport x86_thiscallcc void @"?func@?$ClassTemplate@N@@QAEXXZ"
931 // G32-DAG: define linkonce_odr dso_local x86_thiscallcc void @_ZN13ClassTemplateIdE4funcEv
932 
933 // MS: Base class already instantiated with dfferent attribute.
934 struct __declspec(dllexport) DerivedFromTemplateB : public ClassTemplate<bool> {};
935 struct __declspec(dllimport) DerivedFromTemplateB2 : public ClassTemplate<bool> {};
936 USEMEMFUNC(ClassTemplate<bool>, func)
937 // M32-DAG: define weak_odr dso_local dllexport x86_thiscallcc void @"?func@?$ClassTemplate@_N@@QAEXXZ"
938 // G32-DAG: define linkonce_odr dso_local x86_thiscallcc void @_ZN13ClassTemplateIbE4funcEv
939 
940 // Base class already specialized without dll attribute.
941 struct __declspec(dllimport) DerivedFromExplicitlySpecializedTemplate : public ExplicitlySpecializedTemplate<int> {};
942 USEMEMFUNC(ExplicitlySpecializedTemplate<int>, func)
943 // M32-DAG: define linkonce_odr dso_local x86_thiscallcc void @"?func@?$ExplicitlySpecializedTemplate@H@@QAEXXZ"
944 // G32-DAG: define linkonce_odr dso_local x86_thiscallcc void @_ZN29ExplicitlySpecializedTemplateIiE4funcEv
945 
946 // Base class alredy specialized with export attribute.
947 struct __declspec(dllimport) DerivedFromExplicitlyExportSpecializedTemplate : public ExplicitlyExportSpecializedTemplate<int> {};
948 USEMEMFUNC(ExplicitlyExportSpecializedTemplate<int>, func)
949 // M32-DAG: define dso_local dllexport x86_thiscallcc void @"?func@?$ExplicitlyExportSpecializedTemplate@H@@QAEXXZ"
950 // G32-DAG: define dso_local dllexport x86_thiscallcc void @_ZN35ExplicitlyExportSpecializedTemplateIiE4funcEv
951 
952 // Base class already specialized with import attribute.
953 struct __declspec(dllimport) DerivedFromExplicitlyImportSpecializedTemplate : public ExplicitlyImportSpecializedTemplate<int> {};
954 USEMEMFUNC(ExplicitlyImportSpecializedTemplate<int>, func)
955 // M32-DAG: declare dllimport x86_thiscallcc void @"?func@?$ExplicitlyImportSpecializedTemplate@H@@QAEXXZ"
956 // G32-DAG: declare dllimport x86_thiscallcc void @_ZN35ExplicitlyImportSpecializedTemplateIiE4funcEv
957 
958 // Base class already instantiated without dll attribute.
959 struct __declspec(dllimport) DerivedFromExplicitlyInstantiatedTemplate : public ExplicitlyInstantiatedTemplate<int> {};
960 USEMEMFUNC(ExplicitlyInstantiatedTemplate<int>, func)
961 // M32-DAG: define weak_odr dso_local x86_thiscallcc void @"?func@?$ExplicitlyInstantiatedTemplate@H@@QAEXXZ"
962 // G32-DAG: define weak_odr dso_local x86_thiscallcc void @_ZN30ExplicitlyInstantiatedTemplateIiE4funcEv
963 
964 // Base class already instantiated with export attribute.
965 struct __declspec(dllimport) DerivedFromExplicitlyExportInstantiatedTemplate : public ExplicitlyExportInstantiatedTemplate<int> {};
966 USEMEMFUNC(ExplicitlyExportInstantiatedTemplate<int>, func)
967 // M32-DAG: define weak_odr dso_local dllexport x86_thiscallcc void @"?func@?$ExplicitlyExportInstantiatedTemplate@H@@QAEXXZ"
968 // G32-DAG: define weak_odr dso_local dllexport x86_thiscallcc void @_ZN36ExplicitlyExportInstantiatedTemplateIiE4funcEv
969 
970 // Base class already instantiated with import attribute.
971 struct __declspec(dllimport) DerivedFromExplicitlyImportInstantiatedTemplate : public ExplicitlyImportInstantiatedTemplate<int> {};
972 USEMEMFUNC(ExplicitlyImportInstantiatedTemplate<int>, func)
973 // M32-DAG: declare dllimport x86_thiscallcc void @"?func@?$ExplicitlyImportInstantiatedTemplate@H@@QAEXXZ"
974 // G32-DAG: declare dllimport x86_thiscallcc void @_ZN36ExplicitlyImportInstantiatedTemplateIiE4funcEv
975 
976 // MS: A dll attribute propagates through multiple levels of instantiation.
977 template <typename T> struct TopClass { void func() {} };
978 template <typename T> struct MiddleClass : public TopClass<T> { };
979 struct __declspec(dllimport) BottomClass : public MiddleClass<int> { };
980 USEMEMFUNC(TopClass<int>, func)
981 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"?func@?$TopClass@H@@QAEXXZ"
982 // G32-DAG: define linkonce_odr dso_local x86_thiscallcc void @_ZN8TopClassIiE4funcEv
983 
984 template <typename T> struct ExplicitInstantiationDeclTemplateBase { void func() {} };
985 extern template struct ExplicitInstantiationDeclTemplateBase<int>;
986 struct __declspec(dllimport) DerivedFromExplicitInstantiationDeclTemplateBase : public ExplicitInstantiationDeclTemplateBase<int> {};
987 template struct ExplicitInstantiationDeclTemplateBase<int>;
988 USEMEMFUNC(ExplicitInstantiationDeclTemplateBase<int>, func)
989 // M32-DAG: declare dllimport x86_thiscallcc void @"?func@?$ExplicitInstantiationDeclTemplateBase@H@@QAEXXZ"
990 // G32-DAG: define weak_odr dso_local x86_thiscallcc void @_ZN37ExplicitInstantiationDeclTemplateBaseIiE4funcEv
991 
992 template <typename T> struct ExplicitInstantiationDeclTemplateBase2 { void func() {} };
993 extern template struct ExplicitInstantiationDeclTemplateBase2<int>;
994 struct __declspec(dllimport) DerivedFromExplicitInstantiationDeclTemplateBase2 : public ExplicitInstantiationDeclTemplateBase2<int> {};
995 template struct __declspec(dllexport) ExplicitInstantiationDeclTemplateBase2<int>;
996 USEMEMFUNC(ExplicitInstantiationDeclTemplateBase2<int>, func)
997 // M32-DAG: declare dllimport x86_thiscallcc void @"?func@?$ExplicitInstantiationDeclTemplateBase2@H@@QAEXXZ"
998 // G32-DAG: define weak_odr dso_local x86_thiscallcc void @_ZN38ExplicitInstantiationDeclTemplateBase2IiE4funcEv
999 
1000 namespace pr39496 {
1001 // Make sure dll attribute are inherited by static locals also in template
1002 // specializations.
1003 template <typename> struct __declspec(dllimport) S { int foo() { static int x; return x++; } };
1004 int foo() { S<int> s; return s.foo(); }
1005 // MO1-DAG: @"?x@?{{1|2}}??foo@?$S@H@pr39496@@Q{{[A-Z]*}}HXZ@4HA" = available_externally dllimport global i32 0, align 4
1006 
1007 template <typename> struct T { int foo() { static int x; return x++; } };
1008 extern template struct __declspec(dllimport) T<int>;
1009 int bar() { T<int> t; return t.foo(); }
1010 // MO1-DAG: @"?x@?{{1|2}}??foo@?$T@H@pr39496@@Q{{[A-Z]*}}HXZ@4HA" = available_externally dllimport global i32 0, align 4
1011 
1012 template <typename T> struct __declspec(dllimport) U {
1013   void foo() {
1014     // Don't inherit dllimport to src before attaching the initializer.
1015     static constexpr char src[] = {"hello"};
1016     T arr[sizeof(src)];
1017   }
1018 };
1019 void baz() { U<int> u; u.foo(); } // No diagnostic.
1020 
1021 }
1022