1 // RUN: %clang_cc1 -triple i686-windows-msvc   -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O1 -mconstructor-aliases -disable-llvm-optzns -o - %s -w | FileCheck --check-prefix=MSC --check-prefix=M32 %s
2 // RUN: %clang_cc1 -triple x86_64-windows-msvc -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O0 -o - %s -w | FileCheck --check-prefix=MSC --check-prefix=M64 %s
3 // RUN: %clang_cc1 -triple i686-windows-gnu    -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O0 -o - %s -w | FileCheck --check-prefix=GNU --check-prefix=G32 %s
4 // RUN: %clang_cc1 -triple x86_64-windows-gnu  -emit-llvm -std=c++1y -fno-threadsafe-statics -fms-extensions -O0 -o - %s -w | FileCheck --check-prefix=GNU --check-prefix=G64 %s
5 
6 // Helper structs to make templates more expressive.
7 struct ImplicitInst_Exported {};
8 struct ExplicitDecl_Exported {};
9 struct ExplicitInst_Exported {};
10 struct ExplicitSpec_Exported {};
11 struct ExplicitSpec_Def_Exported {};
12 struct ExplicitSpec_InlineDef_Exported {};
13 struct ExplicitSpec_NotExported {};
14 struct External { int v; };
15 
16 #define JOIN2(x, y) x##y
17 #define JOIN(x, y) JOIN2(x, y)
18 #define UNIQ(name) JOIN(name, __LINE__)
19 #define USEVAR(var) int UNIQ(use)() { return var; }
20 #define USE(func) void UNIQ(use)() { func(); }
21 #define USEMEMFUNC(class, func) void (class::*UNIQ(use)())() { return &class::func; }
22 #define INSTVAR(var) template int var;
23 #define INST(func) template void func();
24 
25 // The vftable for struct W is comdat largest because we have RTTI.
26 // M32-DAG: $"\01??_7W@@6B@" = comdat largest
27 
28 
29 //===----------------------------------------------------------------------===//
30 // Globals
31 //===----------------------------------------------------------------------===//
32 
33 // Declarations are not exported.
34 // MSC-NOT: @"\01?ExternGlobalDecl@@3HA"
35 // GNU-NOT: @ExternGlobalDecl
36 __declspec(dllexport) extern int ExternGlobalDecl;
37 
38 // dllexport implies a definition.
39 // MSC-DAG: @"\01?GlobalDef@@3HA" = dllexport global i32 0, align 4
40 // GNU-DAG: @GlobalDef            = dllexport global i32 0, align 4
41 __declspec(dllexport) int GlobalDef;
42 
43 // Export definition.
44 // MSC-DAG: @"\01?GlobalInit1@@3HA" = dllexport global i32 1, align 4
45 // GNU-DAG: @GlobalInit1            = dllexport global i32 1, align 4
46 __declspec(dllexport) int GlobalInit1 = 1;
47 
48 // MSC-DAG: @"\01?GlobalInit2@@3HA" = dllexport global i32 1, align 4
49 // GNU-DAG: @GlobalInit2            = dllexport global i32 1, align 4
50 int __declspec(dllexport) GlobalInit2 = 1;
51 
52 // Declare, then export definition.
53 // MSC-DAG: @"\01?GlobalDeclInit@@3HA" = dllexport global i32 1, align 4
54 // GNU-DAG: @GlobalDeclInit            = dllexport global i32 1, align 4
55 __declspec(dllexport) extern int GlobalDeclInit;
56 int GlobalDeclInit = 1;
57 
58 // Redeclarations
59 // MSC-DAG: @"\01?GlobalRedecl1@@3HA" = dllexport global i32 0, align 4
60 // GNU-DAG: @GlobalRedecl1            = dllexport global i32 0, align 4
61 __declspec(dllexport) extern int GlobalRedecl1;
62 __declspec(dllexport)        int GlobalRedecl1;
63 
64 // MSC-DAG: @"\01?GlobalRedecl2@@3HA" = dllexport global i32 0, align 4
65 // GNU-DAG: @GlobalRedecl2            = dllexport global i32 0, align 4
66 __declspec(dllexport) extern int GlobalRedecl2;
67                              int GlobalRedecl2;
68 
69 // MSC-DAG: @"\01?ExternalGlobal@ns@@3HA" = dllexport global i32 0, align 4
70 // GNU-DAG: @_ZN2ns14ExternalGlobalE      = dllexport global i32 0, align 4
71 namespace ns { __declspec(dllexport) int ExternalGlobal; }
72 
73 // MSC-DAG: @"\01?ExternalAutoTypeGlobal@@3UExternal@@A" = dllexport global %struct.External zeroinitializer, align 4
74 // GNU-DAG: @ExternalAutoTypeGlobal                      = dllexport global %struct.External zeroinitializer, align 4
75 __declspec(dllexport) auto ExternalAutoTypeGlobal = External();
76 
77 int f();
78 // MSC-DAG: @"\01?x@?1??nonInlineStaticLocalsFunc@@YAHXZ@4HA" = internal {{(unnamed_addr )*}}global i32 0
79 // MSC-DAG: @"\01?$S1@?1??nonInlineStaticLocalsFunc@@YAHXZ@4IA" = internal {{(unnamed_addr )*}}global i32 0
80 int __declspec(dllexport) nonInlineStaticLocalsFunc() {
81   static int x = f();
82   return x++;
83 };
84 
85 // MSC-DAG: @"\01?x@?1??inlineStaticLocalsFunc@@YAHXZ@4HA" = weak_odr dllexport global i32 0, comdat
86 // MSC-DAG: @"\01??_B?1??inlineStaticLocalsFunc@@YAHXZ@51" = weak_odr dllexport global i32 0, comdat
87 // Note: MinGW doesn't seem to export the static local here.
88 inline int __declspec(dllexport) inlineStaticLocalsFunc() {
89   static int x = f();
90   return x++;
91 }
92 
93 
94 
95 //===----------------------------------------------------------------------===//
96 // Variable templates
97 //===----------------------------------------------------------------------===//
98 
99 // Declarations are not exported.
100 
101 // dllexport implies a definition.
102 // MSC-NOT: @"\01??$VarTmplDef@UExplicitInst_Exported@@@@3HA"
103 // GNU-NOT: @_Z10VarTmplDefI21ExplicitInst_ExportedE
104 template<typename T> __declspec(dllexport) int VarTmplDef;
105 INSTVAR(VarTmplDef<ExplicitInst_Exported>)
106 
107 // MSC-DAG: @"\01??$VarTmplImplicitDef@UImplicitInst_Exported@@@@3HA" = external dllexport global
108 // GNU-DAG: @_Z18VarTmplImplicitDefI21ImplicitInst_ExportedE          = external dllexport global
109 template<typename T> __declspec(dllexport) int VarTmplImplicitDef;
110 USEVAR(VarTmplImplicitDef<ImplicitInst_Exported>)
111 
112 // Export definition.
113 // MSC-DAG: @"\01??$VarTmplInit1@UExplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, comdat, align 4
114 // GNU-DAG: @_Z12VarTmplInit1I21ExplicitInst_ExportedE          = weak_odr dllexport global i32 1, comdat, align 4
115 template<typename T> __declspec(dllexport) int VarTmplInit1 = 1;
116 INSTVAR(VarTmplInit1<ExplicitInst_Exported>)
117 
118 // MSC-DAG: @"\01??$VarTmplInit2@UExplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, comdat, align 4
119 // GNU-DAG: @_Z12VarTmplInit2I21ExplicitInst_ExportedE          = weak_odr dllexport global i32 1, comdat, align 4
120 template<typename T> int __declspec(dllexport) VarTmplInit2 = 1;
121 INSTVAR(VarTmplInit2<ExplicitInst_Exported>)
122 
123 // Declare, then export definition.
124 // MSC-DAG: @"\01??$VarTmplDeclInit@UExplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, comdat, align 4
125 // GNU-DAG: @_Z15VarTmplDeclInitI21ExplicitInst_ExportedE          = weak_odr dllexport global i32 1, comdat, align 4
126 template<typename T> __declspec(dllexport) extern int VarTmplDeclInit;
127 template<typename T>                              int VarTmplDeclInit = 1;
128 INSTVAR(VarTmplDeclInit<ExplicitInst_Exported>)
129 
130 // Redeclarations
131 // MSC-DAG: @"\01??$VarTmplRedecl1@UExplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, comdat, align 4
132 // GNU-DAG: @_Z14VarTmplRedecl1I21ExplicitInst_ExportedE          = weak_odr dllexport global i32 1, comdat, align 4
133 template<typename T> __declspec(dllexport) extern int VarTmplRedecl1;
134 template<typename T> __declspec(dllexport)        int VarTmplRedecl1 = 1;
135 INSTVAR(VarTmplRedecl1<ExplicitInst_Exported>)
136 
137 // MSC-DAG: @"\01??$VarTmplRedecl2@UExplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, comdat, align 4
138 // GNU-DAG: @_Z14VarTmplRedecl2I21ExplicitInst_ExportedE          = weak_odr dllexport global i32 1, comdat, align 4
139 template<typename T> __declspec(dllexport) extern int VarTmplRedecl2;
140 template<typename T>                              int VarTmplRedecl2 = 1;
141 INSTVAR(VarTmplRedecl2<ExplicitInst_Exported>)
142 
143 // MSC-DAG: @"\01??$ExternalVarTmpl@UExplicitInst_Exported@@@ns@@3HA" = weak_odr dllexport global i32 1, comdat, align 4
144 // GNU-DAG: @_ZN2ns15ExternalVarTmplI21ExplicitInst_ExportedEE        = weak_odr dllexport global i32 1, comdat, align 4
145 namespace ns { template<typename T> __declspec(dllexport) int ExternalVarTmpl = 1; }
146 INSTVAR(ns::ExternalVarTmpl<ExplicitInst_Exported>)
147 
148 // MSC-DAG: @"\01??$ExternalAutoTypeVarTmpl@UExplicitInst_Exported@@@@3UExternal@@A" = weak_odr dllexport global %struct.External zeroinitializer, comdat, align 4
149 // GNU-DAG: @_Z23ExternalAutoTypeVarTmplI21ExplicitInst_ExportedE                    = weak_odr dllexport global %struct.External zeroinitializer, comdat, align 4
150 template<typename T> __declspec(dllexport) auto ExternalAutoTypeVarTmpl = External();
151 template External ExternalAutoTypeVarTmpl<ExplicitInst_Exported>;
152 
153 
154 template<typename T> int VarTmpl = 1;
155 template<typename T> __declspec(dllexport) int ExportedVarTmpl = 1;
156 
157 // Export implicit instantiation of an exported variable template.
158 // MSC-DAG: @"\01??$ExportedVarTmpl@UImplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, comdat, align 4
159 // GNU-DAG: @_Z15ExportedVarTmplI21ImplicitInst_ExportedE          = weak_odr dllexport global i32 1, comdat, align 4
160 USEVAR(ExportedVarTmpl<ImplicitInst_Exported>)
161 
162 // Export explicit instantiation declaration of an exported variable template.
163 // MSC-DAG: @"\01??$ExportedVarTmpl@UImplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, comdat, align 4
164 // GNU-DAG: @_Z15ExportedVarTmplI21ExplicitDecl_ExportedE          = weak_odr dllexport global i32 1, comdat, align 4
165 extern template int ExportedVarTmpl<ExplicitDecl_Exported>;
166        template int ExportedVarTmpl<ExplicitDecl_Exported>;
167 
168 // Export explicit instantiation definition of an exported variable template.
169 // MSC-DAG: @"\01??$ExportedVarTmpl@UImplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, comdat, align 4
170 // GNU-DAG: @_Z15ExportedVarTmplI21ExplicitInst_ExportedE          = weak_odr dllexport global i32 1, comdat, align 4
171 template __declspec(dllexport) int ExportedVarTmpl<ExplicitInst_Exported>;
172 
173 // Export specialization of an exported variable template.
174 // MSC-DAG: @"\01??$ExportedVarTmpl@UExplicitSpec_Exported@@@@3HA" = dllexport global i32 0, align 4
175 // GNU-DAG: @_Z15ExportedVarTmplI21ExplicitSpec_ExportedE          = dllexport global i32 0, align 4
176 template<> __declspec(dllexport) int ExportedVarTmpl<ExplicitSpec_Exported>;
177 
178 // MSC-DAG: @"\01??$ExportedVarTmpl@UExplicitSpec_Def_Exported@@@@3HA" = dllexport global i32 1, align 4
179 // GNU-DAG: @_Z15ExportedVarTmplI25ExplicitSpec_Def_ExportedE          = dllexport global i32 1, align 4
180 template<> __declspec(dllexport) int ExportedVarTmpl<ExplicitSpec_Def_Exported> = 1;
181 
182 // Not exporting specialization of an exported variable template without
183 // explicit dllexport.
184 // MSC-DAG: @"\01??$ExportedVarTmpl@UExplicitSpec_NotExported@@@@3HA" = global i32 0, align 4
185 // GNU-DAG: @_Z15ExportedVarTmplI24ExplicitSpec_NotExportedE          = global i32 0, align 4
186 template<> int ExportedVarTmpl<ExplicitSpec_NotExported>;
187 
188 
189 // Export explicit instantiation declaration of a non-exported variable template.
190 // MSC-DAG: @"\01??$VarTmpl@UExplicitDecl_Exported@@@@3HA" = weak_odr dllexport global i32 1, comdat, align 4
191 // GNU-DAG: @_Z7VarTmplI21ExplicitDecl_ExportedE           = weak_odr dllexport global i32 1, comdat, align 4
192 extern template __declspec(dllexport) int VarTmpl<ExplicitDecl_Exported>;
193        template __declspec(dllexport) int VarTmpl<ExplicitDecl_Exported>;
194 
195 // Export explicit instantiation definition of a non-exported variable template.
196 // MSC-DAG: @"\01??$VarTmpl@UExplicitInst_Exported@@@@3HA" = weak_odr dllexport global i32 1, comdat, align 4
197 // GNU-DAG: @_Z7VarTmplI21ExplicitInst_ExportedE           = weak_odr dllexport global i32 1, comdat, align 4
198 template __declspec(dllexport) int VarTmpl<ExplicitInst_Exported>;
199 
200 // Export specialization of a non-exported variable template.
201 // MSC-DAG: @"\01??$VarTmpl@UExplicitSpec_Exported@@@@3HA" = dllexport global i32 0, align 4
202 // GNU-DAG: @_Z7VarTmplI21ExplicitSpec_ExportedE           = dllexport global i32 0, align 4
203 template<> __declspec(dllexport) int VarTmpl<ExplicitSpec_Exported>;
204 
205 // MSC-DAG: @"\01??$VarTmpl@UExplicitSpec_Def_Exported@@@@3HA" = dllexport global i32 1, align 4
206 // GNU-DAG: @_Z7VarTmplI25ExplicitSpec_Def_ExportedE           = dllexport global i32 1, align 4
207 template<> __declspec(dllexport) int VarTmpl<ExplicitSpec_Def_Exported> = 1;
208 
209 
210 
211 //===----------------------------------------------------------------------===//
212 // Functions
213 //===----------------------------------------------------------------------===//
214 
215 // Declarations are not exported.
216 
217 // Export function definition.
218 // MSC-DAG: define dllexport void @"\01?def@@YAXXZ"()
219 // GNU-DAG: define dllexport void @_Z3defv()
220 __declspec(dllexport) void def() {}
221 
222 // extern "C"
223 // MSC-DAG: define dllexport void @externC()
224 // GNU-DAG: define dllexport void @externC()
225 extern "C" __declspec(dllexport) void externC() {}
226 
227 // Export inline function.
228 // MSC-DAG: define weak_odr dllexport void @"\01?inlineFunc@@YAXXZ"()
229 // GNU-DAG: define weak_odr dllexport void @_Z10inlineFuncv()
230 __declspec(dllexport) inline void inlineFunc() {}
231 
232 // MSC-DAG: define weak_odr dllexport void @"\01?inlineDecl@@YAXXZ"()
233 // GNU-DAG: define weak_odr dllexport void @_Z10inlineDeclv()
234 __declspec(dllexport) inline void inlineDecl();
235                              void inlineDecl() {}
236 
237 // MSC-DAG: define weak_odr dllexport void @"\01?inlineDef@@YAXXZ"()
238 // GNU-DAG: define weak_odr dllexport void @_Z9inlineDefv()
239 __declspec(dllexport) void inlineDef();
240                inline void inlineDef() {}
241 
242 // Redeclarations
243 // MSC-DAG: define dllexport void @"\01?redecl1@@YAXXZ"()
244 // GNU-DAG: define dllexport void @_Z7redecl1v()
245 __declspec(dllexport) void redecl1();
246 __declspec(dllexport) void redecl1() {}
247 
248 // MSC-DAG: define dllexport void @"\01?redecl2@@YAXXZ"()
249 // GNU-DAG: define dllexport void @_Z7redecl2v()
250 __declspec(dllexport) void redecl2();
251                       void redecl2() {}
252 
253 // Friend functions
254 // MSC-DAG: define dllexport void @"\01?friend1@@YAXXZ"()
255 // GNU-DAG: define dllexport void @_Z7friend1v()
256 // MSC-DAG: define dllexport void @"\01?friend2@@YAXXZ"()
257 // GNU-DAG: define dllexport void @_Z7friend2v()
258 struct FuncFriend {
259   friend __declspec(dllexport) void friend1();
260   friend __declspec(dllexport) void friend2();
261 };
262 __declspec(dllexport) void friend1() {}
263                       void friend2() {}
264 
265 // Implicit declarations can be redeclared with dllexport.
266 // MSC-DAG: define dllexport noalias i8* @"\01??2@{{YAPAXI|YAPEAX_K}}@Z"(
267 // GNU-DAG: define dllexport noalias i8* @_Znw{{[yj]}}(
268 void* alloc(__SIZE_TYPE__ n);
269 __declspec(dllexport) void* operator new(__SIZE_TYPE__ n) { return alloc(n); }
270 
271 // MSC-DAG: define dllexport void @"\01?externalFunc@ns@@YAXXZ"()
272 // GNU-DAG: define dllexport void @_ZN2ns12externalFuncEv()
273 namespace ns { __declspec(dllexport) void externalFunc() {} }
274 
275 
276 
277 //===----------------------------------------------------------------------===//
278 // Function templates
279 //===----------------------------------------------------------------------===//
280 
281 // Export function template definition.
282 // MSC-DAG: define weak_odr dllexport void @"\01??$funcTmplDef@UExplicitInst_Exported@@@@YAXXZ"()
283 // GNU-DAG: define weak_odr dllexport void @_Z11funcTmplDefI21ExplicitInst_ExportedEvv()
284 template<typename T> __declspec(dllexport) void funcTmplDef() {}
285 INST(funcTmplDef<ExplicitInst_Exported>)
286 
287 // Export inline function template.
288 // MSC-DAG: define weak_odr dllexport void @"\01??$inlineFuncTmpl1@UExplicitInst_Exported@@@@YAXXZ"()
289 // GNU-DAG: define weak_odr dllexport void @_Z15inlineFuncTmpl1I21ExplicitInst_ExportedEvv()
290 template<typename T> __declspec(dllexport) inline void inlineFuncTmpl1() {}
291 INST(inlineFuncTmpl1<ExplicitInst_Exported>)
292 
293 // MSC-DAG: define weak_odr dllexport void @"\01??$inlineFuncTmpl2@UExplicitInst_Exported@@@@YAXXZ"()
294 // GNU-DAG: define weak_odr dllexport void @_Z15inlineFuncTmpl2I21ExplicitInst_ExportedEvv()
295 template<typename T> inline void __attribute__((dllexport)) inlineFuncTmpl2() {}
296 INST(inlineFuncTmpl2<ExplicitInst_Exported>)
297 
298 // MSC-DAG: define weak_odr dllexport void @"\01??$inlineFuncTmplDecl@UExplicitInst_Exported@@@@YAXXZ"()
299 // GNU-DAG: define weak_odr dllexport void @_Z18inlineFuncTmplDeclI21ExplicitInst_ExportedEvv()
300 template<typename T> __declspec(dllexport) inline void inlineFuncTmplDecl();
301 template<typename T>                              void inlineFuncTmplDecl() {}
302 INST(inlineFuncTmplDecl<ExplicitInst_Exported>)
303 
304 // MSC-DAG: define weak_odr dllexport void @"\01??$inlineFuncTmplDef@UExplicitInst_Exported@@@@YAXXZ"()
305 // GNU-DAG: define weak_odr dllexport void @_Z17inlineFuncTmplDefI21ExplicitInst_ExportedEvv()
306 template<typename T> __declspec(dllexport) void inlineFuncTmplDef();
307 template<typename T>                inline void inlineFuncTmplDef() {}
308 INST(inlineFuncTmplDef<ExplicitInst_Exported>)
309 
310 
311 // Redeclarations
312 // MSC-DAG: define weak_odr dllexport void @"\01??$funcTmplRedecl1@UExplicitInst_Exported@@@@YAXXZ"()
313 // GNU-DAG: define weak_odr dllexport void @_Z15funcTmplRedecl1I21ExplicitInst_ExportedEvv()
314 template<typename T> __declspec(dllexport) void funcTmplRedecl1();
315 template<typename T> __declspec(dllexport) void funcTmplRedecl1() {}
316 INST(funcTmplRedecl1<ExplicitInst_Exported>)
317 
318 // MSC-DAG: define weak_odr dllexport void @"\01??$funcTmplRedecl2@UExplicitInst_Exported@@@@YAXXZ"()
319 // GNU-DAG: define weak_odr dllexport void @_Z15funcTmplRedecl2I21ExplicitInst_ExportedEvv()
320 template<typename T> __declspec(dllexport) void funcTmplRedecl2();
321 template<typename T>                       void funcTmplRedecl2() {}
322 INST(funcTmplRedecl2<ExplicitInst_Exported>)
323 
324 // MSC-DAG: define weak_odr dllexport void @"\01??$funcTmplRedecl3@UExplicitInst_Exported@@@@YAXXZ"()
325 // GNU-DAG: define weak_odr dllexport void @_Z15funcTmplRedecl3I21ExplicitInst_ExportedEvv()
326 template<typename T> __declspec(dllexport) void funcTmplRedecl3();
327 template<typename T>                       void funcTmplRedecl3() {}
328 INST(funcTmplRedecl3<ExplicitInst_Exported>)
329 
330 
331 // Function template friends
332 // MSC-DAG: define weak_odr dllexport void @"\01??$funcTmplFriend1@UExplicitInst_Exported@@@@YAXXZ"()
333 // GNU-DAG: define weak_odr dllexport void @_Z15funcTmplFriend1I21ExplicitInst_ExportedEvv()
334 // MSC-DAG: define weak_odr dllexport void @"\01??$funcTmplFriend2@UExplicitInst_Exported@@@@YAXXZ"()
335 // GNU-DAG: define weak_odr dllexport void @_Z15funcTmplFriend2I21ExplicitInst_ExportedEvv()
336 struct FuncTmplFriend {
337   template<typename T> friend __declspec(dllexport) void funcTmplFriend1();
338   template<typename T> friend __declspec(dllexport) void funcTmplFriend2();
339 };
340 template<typename T> __declspec(dllexport) void funcTmplFriend1() {}
341 template<typename T>                       void funcTmplFriend2() {}
342 INST(funcTmplFriend1<ExplicitInst_Exported>)
343 INST(funcTmplFriend2<ExplicitInst_Exported>)
344 
345 // MSC-DAG: define weak_odr dllexport void @"\01??$externalFuncTmpl@UExplicitInst_Exported@@@ns@@YAXXZ"()
346 // GNU-DAG: define weak_odr dllexport void @_ZN2ns16externalFuncTmplI21ExplicitInst_ExportedEEvv()
347 namespace ns { template<typename T> __declspec(dllexport) void externalFuncTmpl() {} }
348 INST(ns::externalFuncTmpl<ExplicitInst_Exported>)
349 
350 
351 template<typename T> void funcTmpl() {}
352 template<typename T> __declspec(dllexport) void exportedFuncTmpl() {}
353 
354 // Export implicit instantiation of an exported function template.
355 // MSC-DAG: define weak_odr dllexport void @"\01??$exportedFuncTmpl@UImplicitInst_Exported@@@@YAXXZ"()
356 // GNU-DAG: define weak_odr dllexport void @_Z16exportedFuncTmplI21ImplicitInst_ExportedEvv()
357 USE(exportedFuncTmpl<ImplicitInst_Exported>)
358 
359 // Export explicit instantiation declaration of an exported function template.
360 // MSC-DAG: define weak_odr dllexport void @"\01??$exportedFuncTmpl@UExplicitDecl_Exported@@@@YAXXZ"()
361 // GNU-DAG: define weak_odr dllexport void @_Z16exportedFuncTmplI21ExplicitDecl_ExportedEvv()
362 extern template void exportedFuncTmpl<ExplicitDecl_Exported>();
363        template void exportedFuncTmpl<ExplicitDecl_Exported>();
364 
365 // Export explicit instantiation definition of an exported function template.
366 // MSC-DAG: define weak_odr dllexport void @"\01??$exportedFuncTmpl@UExplicitInst_Exported@@@@YAXXZ"()
367 // GNU-DAG: define weak_odr dllexport void @_Z16exportedFuncTmplI21ExplicitInst_ExportedEvv()
368 template void exportedFuncTmpl<ExplicitInst_Exported>();
369 
370 // Export specialization of an exported function template.
371 // MSC-DAG: define dllexport void @"\01??$exportedFuncTmpl@UExplicitSpec_Def_Exported@@@@YAXXZ"()
372 // GNU-DAG: define dllexport void @_Z16exportedFuncTmplI25ExplicitSpec_Def_ExportedEvv()
373 template<> __declspec(dllexport) void exportedFuncTmpl<ExplicitSpec_Def_Exported>() {}
374 
375 // MSC-DAG: define weak_odr dllexport void @"\01??$exportedFuncTmpl@UExplicitSpec_InlineDef_Exported@@@@YAXXZ"()
376 // GNU-DAG: define weak_odr dllexport void @_Z16exportedFuncTmplI31ExplicitSpec_InlineDef_ExportedEvv()
377 template<> __declspec(dllexport) inline void exportedFuncTmpl<ExplicitSpec_InlineDef_Exported>() {}
378 
379 // Not exporting specialization of an exported function template without
380 // explicit dllexport.
381 // MSC-DAG: define void @"\01??$exportedFuncTmpl@UExplicitSpec_NotExported@@@@YAXXZ"()
382 // GNU-DAG: define void @_Z16exportedFuncTmplI24ExplicitSpec_NotExportedEvv()
383 template<> void exportedFuncTmpl<ExplicitSpec_NotExported>() {}
384 
385 
386 // Export explicit instantiation declaration of a non-exported function template.
387 // MSC-DAG: define weak_odr dllexport void @"\01??$funcTmpl@UExplicitDecl_Exported@@@@YAXXZ"()
388 // GNU-DAG: define weak_odr dllexport void @_Z8funcTmplI21ExplicitDecl_ExportedEvv()
389 extern template __declspec(dllexport) void funcTmpl<ExplicitDecl_Exported>();
390        template __declspec(dllexport) void funcTmpl<ExplicitDecl_Exported>();
391 
392 // Export explicit instantiation definition of a non-exported function template.
393 // MSC-DAG: define weak_odr dllexport void @"\01??$funcTmpl@UExplicitInst_Exported@@@@YAXXZ"()
394 // GNU-DAG: define weak_odr dllexport void @_Z8funcTmplI21ExplicitInst_ExportedEvv()
395 template __declspec(dllexport) void funcTmpl<ExplicitInst_Exported>();
396 
397 // Export specialization of a non-exported function template.
398 // MSC-DAG: define dllexport void @"\01??$funcTmpl@UExplicitSpec_Def_Exported@@@@YAXXZ"()
399 // GNU-DAG: define dllexport void @_Z8funcTmplI25ExplicitSpec_Def_ExportedEvv()
400 template<> __declspec(dllexport) void funcTmpl<ExplicitSpec_Def_Exported>() {}
401 
402 // MSC-DAG: define weak_odr dllexport void @"\01??$funcTmpl@UExplicitSpec_InlineDef_Exported@@@@YAXXZ"()
403 // GNU-DAG: define weak_odr dllexport void @_Z8funcTmplI31ExplicitSpec_InlineDef_ExportedEvv()
404 template<> __declspec(dllexport) inline void funcTmpl<ExplicitSpec_InlineDef_Exported>() {}
405 
406 
407 
408 //===----------------------------------------------------------------------===//
409 // Precedence
410 //===----------------------------------------------------------------------===//
411 
412 // dllexport takes precedence over the dllimport if both are specified.
413 // MSC-DAG: @"\01?PrecedenceGlobal1A@@3HA" = dllexport global i32 0, align 4
414 // MSC-DAG: @"\01?PrecedenceGlobal1B@@3HA" = dllexport global i32 0, align 4
415 // GNU-DAG: @PrecedenceGlobal1A            = dllexport global i32 0, align 4
416 // GNU-DAG: @PrecedenceGlobal1B            = dllexport global i32 0, align 4
417 __attribute__((dllimport, dllexport))       int PrecedenceGlobal1A; // dllimport ignored
418 __declspec(dllimport) __declspec(dllexport) int PrecedenceGlobal1B; // dllimport ignored
419 
420 // MSC-DAG: @"\01?PrecedenceGlobal2A@@3HA" = dllexport global i32 0, align 4
421 // MSC-DAG: @"\01?PrecedenceGlobal2B@@3HA" = dllexport global i32 0, align 4
422 // GNU-DAG: @PrecedenceGlobal2A            = dllexport global i32 0, align 4
423 // GNU-DAG: @PrecedenceGlobal2B            = dllexport global i32 0, align 4
424 __attribute__((dllexport, dllimport))       int PrecedenceGlobal2A; // dllimport ignored
425 __declspec(dllexport) __declspec(dllimport) int PrecedenceGlobal2B; // dllimport ignored
426 
427 // MSC-DAG: @"\01?PrecedenceGlobalRedecl1@@3HA" = dllexport global i32 0, align 4
428 // GNU-DAG: @PrecedenceGlobalRedecl1            = dllexport global i32 0, align 4
429 __declspec(dllexport) extern int PrecedenceGlobalRedecl1;
430 __declspec(dllimport)        int PrecedenceGlobalRedecl1 = 0;
431 
432 // MSC-DAG: @"\01?PrecedenceGlobalRedecl2@@3HA" = dllexport global i32 0, align 4
433 // GNU-DAG: @PrecedenceGlobalRedecl2            = dllexport global i32 0, align 4
434 __declspec(dllimport) extern int PrecedenceGlobalRedecl2;
435 __declspec(dllexport)        int PrecedenceGlobalRedecl2;
436 
437 // MSC-DAG: @"\01?PrecedenceGlobalMixed1@@3HA" = dllexport global i32 0, align 4
438 // GNU-DAG: @PrecedenceGlobalMixed1            = dllexport global i32 0, align 4
439 __attribute__((dllexport)) extern int PrecedenceGlobalMixed1;
440 __declspec(dllimport)             int PrecedenceGlobalMixed1 = 0;
441 
442 // MSC-DAG: @"\01?PrecedenceGlobalMixed2@@3HA" = dllexport global i32 0, align 4
443 // GNU-DAG: @PrecedenceGlobalMixed2            = dllexport global i32 0, align 4
444 __attribute__((dllimport)) extern int PrecedenceGlobalMixed2;
445 __declspec(dllexport)             int PrecedenceGlobalMixed2;
446 
447 // MSC-DAG: define dllexport void @"\01?precedence1A@@YAXXZ"
448 // MSC-DAG: define dllexport void @"\01?precedence1B@@YAXXZ"
449 // GNU-DAG: define dllexport void @_Z12precedence1Av()
450 // GNU-DAG: define dllexport void @_Z12precedence1Bv()
451 void __attribute__((dllimport, dllexport))       precedence1A() {}
452 void __declspec(dllimport) __declspec(dllexport) precedence1B() {}
453 
454 // MSC-DAG: define dllexport void @"\01?precedence2A@@YAXXZ"
455 // MSC-DAG: define dllexport void @"\01?precedence2B@@YAXXZ"
456 // GNU-DAG: define dllexport void @_Z12precedence2Av()
457 // GNU-DAG: define dllexport void @_Z12precedence2Bv()
458 void __attribute__((dllexport, dllimport))       precedence2A() {}
459 void __declspec(dllexport) __declspec(dllimport) precedence2B() {}
460 
461 // MSC-DAG: define dllexport void @"\01?precedenceRedecl1@@YAXXZ"
462 // GNU-DAG: define dllexport void @_Z17precedenceRedecl1v()
463 void __declspec(dllimport) precedenceRedecl1();
464 void __declspec(dllexport) precedenceRedecl1() {}
465 
466 // MSC-DAG: define dllexport void @"\01?precedenceRedecl2@@YAXXZ"
467 // GNU-DAG: define dllexport void @_Z17precedenceRedecl2v()
468 void __declspec(dllexport) precedenceRedecl2();
469 void __declspec(dllimport) precedenceRedecl2() {}
470 
471 
472 
473 //===----------------------------------------------------------------------===//
474 // Classes
475 //===----------------------------------------------------------------------===//
476 
477 struct S {
478   void __declspec(dllexport) a() {}
479   // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?a@S@@QAEXXZ"
480 
481   struct T {
482     void __declspec(dllexport) a() {}
483     // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?a@T@S@@QAEXXZ"
484   };
485 };
486 
487 struct CtorWithClosure {
488   __declspec(dllexport) CtorWithClosure(...) {}
489 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01??_FCtorWithClosure@@QAEXXZ"({{.*}}) comdat
490 // M32-DAG:   %[[this_addr:.*]] = alloca %struct.CtorWithClosure*, align 4
491 // M32-DAG:   store %struct.CtorWithClosure* %this, %struct.CtorWithClosure** %[[this_addr]], align 4
492 // M32-DAG:   %[[this:.*]] = load %struct.CtorWithClosure*, %struct.CtorWithClosure** %[[this_addr]]
493 // M32-DAG:   call %struct.CtorWithClosure* (%struct.CtorWithClosure*, ...) @"\01??0CtorWithClosure@@QAA@ZZ"(%struct.CtorWithClosure* %[[this]])
494 // M32-DAG:   ret void
495 };
496 
497 #define DELETE_IMPLICIT_MEMBERS(ClassName) \
498     ClassName(ClassName &&) = delete; \
499     ClassName(ClassName &) = delete; \
500     ~ClassName() = delete; \
501     ClassName &operator=(ClassName &) = delete
502 
503 struct __declspec(dllexport) ClassWithClosure {
504   DELETE_IMPLICIT_MEMBERS(ClassWithClosure);
505   ClassWithClosure(...) {}
506 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01??_FClassWithClosure@@QAEXXZ"({{.*}}) comdat
507 // M32-DAG:   %[[this_addr:.*]] = alloca %struct.ClassWithClosure*, align 4
508 // M32-DAG:   store %struct.ClassWithClosure* %this, %struct.ClassWithClosure** %[[this_addr]], align 4
509 // M32-DAG:   %[[this:.*]] = load %struct.ClassWithClosure*, %struct.ClassWithClosure** %[[this_addr]]
510 // M32-DAG:   call %struct.ClassWithClosure* (%struct.ClassWithClosure*, ...) @"\01??0ClassWithClosure@@QAA@ZZ"(%struct.ClassWithClosure* %[[this]])
511 // M32-DAG:   ret void
512 };
513 
514 struct __declspec(dllexport) NestedOuter {
515   DELETE_IMPLICIT_MEMBERS(NestedOuter);
516   NestedOuter(void *p = 0) {}
517   struct __declspec(dllexport) NestedInner {
518     DELETE_IMPLICIT_MEMBERS(NestedInner);
519     NestedInner(void *p = 0) {}
520   };
521 };
522 
523 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01??_FNestedOuter@@QAEXXZ"({{.*}}) comdat
524 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01??_FNestedInner@NestedOuter@@QAEXXZ"({{.*}}) comdat
525 
526 template <typename T>
527 struct SomeTemplate {
528   SomeTemplate(T o = T()) : o(o) {}
529   T o;
530 };
531 struct __declspec(dllexport) InheritFromTemplate : SomeTemplate<int> {};
532 
533 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01??_F?$SomeTemplate@H@@QAEXXZ"({{.*}}) comdat
534 
535 namespace PR23801 {
536 template <typename>
537 struct S {
538   ~S() {}
539 };
540 struct A {
541   A(int);
542   S<int> s;
543 };
544 struct __declspec(dllexport) B {
545   B(A = 0) {}
546 };
547 
548 }
549 //
550 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01??_FB@PR23801@@QAEXXZ"({{.*}}) comdat
551 
552 struct __declspec(dllexport) T {
553   // Copy assignment operator:
554   // M32-DAG: define weak_odr dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.T* @"\01??4T@@QAEAAU0@ABU0@@Z"
555 
556   // Explicitly defaulted copy constructur:
557   T(const T&) = default;
558   // M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.T* @"\01??0T@@QAE@ABU0@@Z"
559 
560   void a() {}
561   // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?a@T@@QAEXXZ"
562 
563   static int b;
564   // M32-DAG: @"\01?b@T@@2HA" = external dllexport global i32
565 
566   static int c;
567   // M32-DAG: @"\01?c@T@@2HA" = dllexport global i32 0, align 4
568 };
569 
570 USEVAR(T::b)
571 int T::c;
572 
573 // Export template class with static member variable
574 // MSC-DAG: @"\01?StaticClassVarExpTmplClass@?$TmplClass@H@@2HA" = weak_odr dllexport global i32 0, comdat, align 4
575 // GNU-DAG: @_ZN9TmplClassIiE26StaticClassVarExpTmplClassE = weak_odr dllexport global i32 0, comdat, align 4
576 template<typename T>
577 struct __declspec(dllexport) TmplClass
578 {
579   static T StaticClassVarExpTmplClass;
580 };
581 
582 template<typename T>
583 T TmplClass<T>::StaticClassVarExpTmplClass;
584 
585 // Export a definition of a template function.
586 // MSC-DAG: define weak_odr dllexport i32 @"\01??$TypeFunTmpl@H@@YAHH@Z"
587 // GNU-DAG: define weak_odr dllexport i32 @_Z11TypeFunTmplIiET_S0_
588 template<typename T>
589 T __declspec(dllexport) TypeFunTmpl(T t) { return t + t; }
590 
591 // Instantiate the exported template class and the exported template function.
592 int useExportedTmplStaticAndFun()
593 {
594   return TmplClass<int>::StaticClassVarExpTmplClass + TypeFunTmpl<int>(10);
595 }
596 
597 template <typename T> struct __declspec(dllexport) U { void foo() {} };
598 struct __declspec(dllexport) V : public U<int> { };
599 // U<int>'s assignment operator is emitted.
600 // M32-DAG: define weak_odr dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.U* @"\01??4?$U@H@@QAEAAU0@ABU0@@Z"
601 
602 struct __declspec(dllexport) W { virtual void foo(); };
603 void W::foo() {}
604 // Default ctor:
605 // M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.W* @"\01??0W@@QAE@XZ"
606 // Copy ctor:
607 // M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.W* @"\01??0W@@QAE@ABU0@@Z"
608 // vftable:
609 // M32-DAG: [[W_VTABLE:@.*]] = private unnamed_addr constant [2 x i8*] [i8* bitcast (%rtti.CompleteObjectLocator* @"\01??_R4W@@6B@" to i8*), i8* bitcast (void (%struct.W*)* @"\01?foo@W@@UAEXXZ" to i8*)], comdat($"\01??_7W@@6B@")
610 // M32-DAG: @"\01??_7W@@6B@" = dllexport unnamed_addr alias i8*, getelementptr inbounds ([2 x i8*], [2 x i8*]* [[W_VTABLE]], i32 0, i32 1)
611 // G32-DAG: @_ZTV1W = dllexport unnamed_addr constant [3 x i8*] [i8* null, i8* bitcast ({ i8*, i8* }* @_ZTI1W to i8*), i8* bitcast (void (%struct.W*)* @_ZN1W3fooEv to i8*)]
612 
613 struct __declspec(dllexport) X : public virtual W {};
614 // vbtable:
615 // M32-DAG: @"\01??_8X@@7B@" = weak_odr dllexport unnamed_addr constant [2 x i32] [i32 0, i32 4]
616 
617 struct __declspec(dllexport) Y {
618   // Move assignment operator:
619   // M32-DAG: define weak_odr dllexport x86_thiscallcc dereferenceable({{[0-9]+}}) %struct.Y* @"\01??4Y@@QAEAAU0@$$QAU0@@Z"
620 
621   int x;
622 };
623 
624 struct __declspec(dllexport) Z { virtual ~Z() {} };
625 // The scalar deleting dtor does not get exported:
626 // M32-DAG: define linkonce_odr x86_thiscallcc i8* @"\01??_GZ@@UAEPAXI@Z"
627 
628 
629 // The user-defined dtor does get exported:
630 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01??1Z@@UAE@XZ"
631 
632 namespace UseDtorAlias {
633   struct __declspec(dllexport) A { ~A(); };
634   struct __declspec(dllexport) B : A { ~B(); };
635   A::~A() { }
636   B::~B() { }
637   // Emit a alias definition of B's constructor.
638   // M32-DAG: @"\01??1B@UseDtorAlias@@QAE@XZ" = dllexport alias {{.*}} @"\01??1A@UseDtorAlias@@QAE@XZ"
639 }
640 
641 struct __declspec(dllexport) DefaultedCtorsDtors {
642   DefaultedCtorsDtors() = default;
643   // M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.DefaultedCtorsDtors* @"\01??0DefaultedCtorsDtors@@QAE@XZ"
644   ~DefaultedCtorsDtors() = default;
645   // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01??1DefaultedCtorsDtors@@QAE@XZ"
646 };
647 
648 namespace ReferencedInlineMethodInNestedClass {
649   struct __declspec(dllexport) S {
650     void foo() {
651       t->bar();
652     }
653     struct T {
654       void bar() {}
655     };
656     T *t;
657   };
658   // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?foo@S@ReferencedInlineMethodInNestedClass@@QAEXXZ"
659   // M32-DAG: define linkonce_odr x86_thiscallcc void @"\01?bar@T@S@ReferencedInlineMethodInNestedClass@@QAEXXZ"
660 }
661 
662 // MS ignores DLL attributes on partial specializations.
663 template <typename T> struct PartiallySpecializedClassTemplate {};
664 template <typename T> struct __declspec(dllexport) PartiallySpecializedClassTemplate<T*> { void f(); };
665 template <typename T> void PartiallySpecializedClassTemplate<T*>::f() {}
666 USEMEMFUNC(PartiallySpecializedClassTemplate<void*>, f);
667 // M32-DAG: define linkonce_odr x86_thiscallcc void @"\01?f@?$PartiallySpecializedClassTemplate@PAX@@QAEXXZ"
668 // G32-DAG: define weak_odr dllexport x86_thiscallcc void @_ZN33PartiallySpecializedClassTemplateIPvE1fEv
669 
670 // Attributes on explicit specializations are honored.
671 template <typename T> struct ExplicitlySpecializedClassTemplate {};
672 template <> struct __declspec(dllexport) ExplicitlySpecializedClassTemplate<void*> { void f(); };
673 void ExplicitlySpecializedClassTemplate<void*>::f() {}
674 USEMEMFUNC(ExplicitlySpecializedClassTemplate<void*>, f);
675 // M32-DAG: define dllexport x86_thiscallcc void @"\01?f@?$ExplicitlySpecializedClassTemplate@PAX@@QAEXXZ"
676 // G32-DAG: define dllexport x86_thiscallcc void @_ZN34ExplicitlySpecializedClassTemplateIPvE1fEv
677 
678 // MS inherits DLL attributes to partial specializations.
679 template <typename T> struct __declspec(dllexport) PartiallySpecializedExportedClassTemplate {};
680 template <typename T> struct PartiallySpecializedExportedClassTemplate<T*> { void f() {} };
681 USEMEMFUNC(PartiallySpecializedExportedClassTemplate<void*>, f);
682 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?f@?$PartiallySpecializedExportedClassTemplate@PAX@@QAEXXZ"
683 // G32-DAG: define linkonce_odr x86_thiscallcc void @_ZN41PartiallySpecializedExportedClassTemplateIPvE1fEv
684 
685 // MS ignores DLL attributes on partial specializations; inheritance still works though.
686 template <typename T> struct __declspec(dllexport) PartiallySpecializedExportedClassTemplate2 {};
687 template <typename T> struct __declspec(dllimport) PartiallySpecializedExportedClassTemplate2<T*> { void f(); };
688 template <typename T> void PartiallySpecializedExportedClassTemplate2<T*>::f() {}
689 USEMEMFUNC(PartiallySpecializedExportedClassTemplate2<void*>, f);
690 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?f@?$PartiallySpecializedExportedClassTemplate2@PAX@@QAEXXZ"
691 // G32-DAG: declare dllimport x86_thiscallcc void @_ZN42PartiallySpecializedExportedClassTemplate2IPvE1fEv
692 
693 // Attributes on the instantiation take precedence over attributes on the template.
694 template <typename T> struct __declspec(dllimport) ExplicitlyInstantiatedWithDifferentAttr { void f() {} };
695 template struct __declspec(dllexport) ExplicitlyInstantiatedWithDifferentAttr<int>;
696 USEMEMFUNC(ExplicitlyInstantiatedWithDifferentAttr<int>, f);
697 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?f@?$ExplicitlyInstantiatedWithDifferentAttr@H@@QAEXXZ"
698 
699 // Don't create weak dllexport aliases. (PR21373)
700 struct NonExportedBaseClass {
701   virtual ~NonExportedBaseClass();
702 };
703 NonExportedBaseClass::~NonExportedBaseClass() {}
704 
705 struct __declspec(dllexport) ExportedDerivedClass : NonExportedBaseClass {};
706 // M32-DAG: weak_odr dllexport x86_thiscallcc void @"\01??1ExportedDerivedClass@@UAE@XZ"
707 
708 // Do not assert about generating code for constexpr functions twice during explicit instantiation (PR21718).
709 template <typename T> struct ExplicitInstConstexprMembers {
710   // Copy assignment operator
711   // M32-DAG: define weak_odr dllexport x86_thiscallcc dereferenceable(1) %struct.ExplicitInstConstexprMembers* @"\01??4?$ExplicitInstConstexprMembers@X@@QAEAAU0@ABU0@@Z"
712 
713   constexpr ExplicitInstConstexprMembers() {}
714   // M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.ExplicitInstConstexprMembers* @"\01??0?$ExplicitInstConstexprMembers@X@@QAE@XZ"
715 
716   ExplicitInstConstexprMembers(const ExplicitInstConstexprMembers&) = default;
717   // M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.ExplicitInstConstexprMembers* @"\01??0?$ExplicitInstConstexprMembers@X@@QAE@ABU0@@Z"
718 
719   constexpr int f() const { return 42; }
720   // M32-DAG: define weak_odr dllexport x86_thiscallcc i32 @"\01?f@?$ExplicitInstConstexprMembers@X@@QBEHXZ"
721 };
722 template struct __declspec(dllexport) ExplicitInstConstexprMembers<void>;
723 
724 template <typename T> struct ExplicitInstantiationDeclTemplate { void f() {} };
725 extern template struct __declspec(dllexport) ExplicitInstantiationDeclTemplate<int>;
726 USEMEMFUNC(ExplicitInstantiationDeclTemplate<int>, f);
727 // M32-DAG: {{declare|define available_externally}} x86_thiscallcc void @"\01?f@?$ExplicitInstantiationDeclTemplate@H@@QAEXXZ"
728 
729 template <typename T> struct __declspec(dllexport) ExplicitInstantiationDeclExportedTemplate { void f() {} };
730 extern template struct ExplicitInstantiationDeclExportedTemplate<int>;
731 USEMEMFUNC(ExplicitInstantiationDeclExportedTemplate<int>, f);
732 // M32-DAG: {{declare|define available_externally}} x86_thiscallcc void @"\01?f@?$ExplicitInstantiationDeclExportedTemplate@H@@QAEXXZ"
733 
734 template <typename T> struct ExplicitInstantiationDeclExportedDefTemplate { void f() {} ExplicitInstantiationDeclExportedDefTemplate() {} };
735 extern template struct ExplicitInstantiationDeclExportedDefTemplate<int>;
736 template struct __declspec(dllexport) ExplicitInstantiationDeclExportedDefTemplate<int>;
737 USEMEMFUNC(ExplicitInstantiationDeclExportedDefTemplate<int>, f);
738 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?f@?$ExplicitInstantiationDeclExportedDefTemplate@H@@QAEXXZ"
739 // M32-DAG: define weak_odr dllexport x86_thiscallcc %struct.ExplicitInstantiationDeclExportedDefTemplate* @"\01??0?$ExplicitInstantiationDeclExportedDefTemplate@H@@QAE@XZ"
740 // G32-DAG: define weak_odr x86_thiscallcc void @_ZN44ExplicitInstantiationDeclExportedDefTemplateIiE1fEv
741 
742 namespace { struct InternalLinkageType {}; }
743 struct __declspec(dllexport) PR23308 {
744   void f(InternalLinkageType*);
745 };
746 void PR23308::f(InternalLinkageType*) {}
747 long use(PR23308* p) { p->f(nullptr); }
748 // M32-DAG: define internal x86_thiscallcc void @"\01?f@PR23308@@QAEXPAUInternalLinkageType@?A@@@Z"
749 
750 template <typename T> struct PR23770BaseTemplate { void f() {} };
751 template <typename T> struct PR23770DerivedTemplate : PR23770BaseTemplate<int> {};
752 extern template struct PR23770DerivedTemplate<int>;
753 template struct __declspec(dllexport) PR23770DerivedTemplate<int>;
754 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?f@?$PR23770BaseTemplate@H@@QAEXXZ"
755 
756 namespace InClassInits {
757 
758 struct __declspec(dllexport) S {
759   int x = 42;
760 };
761 // M32-DAG: define weak_odr dllexport x86_thiscallcc %"struct.InClassInits::S"* @"\01??0S@InClassInits@@QAE@XZ"
762 
763 // dllexport an already instantiated class template.
764 template <typename T> struct Base {
765   int x = 42;
766 };
767 Base<int> base;
768 struct __declspec(dllexport) T : Base<int> { };
769 // M32-DAG: define weak_odr dllexport x86_thiscallcc %"struct.InClassInits::Base"* @"\01??0?$Base@H@InClassInits@@QAE@XZ"
770 
771 struct A { A(int); };
772 struct __declspec(dllexport) U {
773   // Class with both default constructor closure and in-class initializer.
774   U(A = 0) {}
775   int x = 0;
776 };
777 // M32-DAG: define weak_odr dllexport x86_thiscallcc %"struct.InClassInits::U"* @"\01??0U@InClassInits@@QAE@UA@1@@Z"
778 
779 struct Evil {
780   template <typename T> struct Base {
781     int x = 0;
782   };
783   struct S : Base<int> {};
784   // The already instantiated Base<int> becomes dllexported below, but the
785   // in-class initializer for Base<>::x still hasn't been parsed, so emitting
786   // the default ctor must still be delayed.
787   struct __declspec(dllexport) T : Base<int> {};
788 };
789 // M32-DAG: define weak_odr dllexport x86_thiscallcc %"struct.InClassInits::Evil::Base"* @"\01??0?$Base@H@Evil@InClassInits@@QAE@XZ"
790 
791 template <typename T> struct Foo {};
792 template <typename T> struct Bar {
793   Bar<T> &operator=(Foo<T>) {}
794 };
795 struct __declspec(dllexport) Baz {
796   Bar<int> n;
797 };
798 // After parsing Baz, in ActOnFinishCXXNonNestedClass we would synthesize
799 // Baz's operator=, causing instantiation of Foo<int> after which
800 // ActOnFinishCXXNonNestedClass is called, and we would bite our own tail.
801 // M32-DAG: define weak_odr dllexport x86_thiscallcc dereferenceable(1) %"struct.InClassInits::Baz"* @"\01??4Baz@InClassInits@@QAEAAU01@ABU01@@Z"
802 }
803 
804 // We had an issue where instantiating A would force emission of B's delayed
805 // exported methods.
806 namespace pr26490 {
807 template <typename T> struct A { };
808 struct __declspec(dllexport) B {
809   B(int = 0) {}
810   A<int> m_fn1() {}
811 };
812 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01??_FB@pr26490@@QAEXXZ"
813 }
814 
815 
816 //===----------------------------------------------------------------------===//
817 // Classes with template base classes
818 //===----------------------------------------------------------------------===//
819 
820 template <typename T> struct ClassTemplate { void func(); };
821 template <typename T> void ClassTemplate<T>::func() {}
822 template <typename T> struct __declspec(dllexport) ExportedClassTemplate { void func(); };
823 template <typename T> void ExportedClassTemplate<T>::func() {}
824 template <typename T> struct __declspec(dllimport) ImportedClassTemplate { void func(); };
825 template <typename T> void ImportedClassTemplate<T>::func() {}
826 
827 template <typename T> struct ExplicitlySpecializedTemplate { void func() {} };
828 template <> struct ExplicitlySpecializedTemplate<int> { void func(); };
829 void ExplicitlySpecializedTemplate<int>::func() {}
830 template <typename T> struct ExplicitlyExportSpecializedTemplate { void func() {} };
831 template <> struct __declspec(dllexport) ExplicitlyExportSpecializedTemplate<int> { void func(); };
832 void ExplicitlyExportSpecializedTemplate<int>::func() {}
833 template <typename T> struct ExplicitlyImportSpecializedTemplate { void func(); };
834 template <> struct __declspec(dllimport) ExplicitlyImportSpecializedTemplate<int> { void func(); };
835 
836 template <typename T> struct ExplicitlyInstantiatedTemplate { void func(); };
837 template <typename T> void ExplicitlyInstantiatedTemplate<T>::func() {}
838 template struct ExplicitlyInstantiatedTemplate<int>;
839 template <typename T> struct ExplicitlyExportInstantiatedTemplate { void func(); };
840 template <typename T> void ExplicitlyExportInstantiatedTemplate<T>::func() {}
841 template struct __declspec(dllexport) ExplicitlyExportInstantiatedTemplate<int>;
842 template <typename T> struct ExplicitlyImportInstantiatedTemplate { void func(); };
843 template struct __declspec(dllimport) ExplicitlyImportInstantiatedTemplate<int>;
844 
845 
846 // MS: ClassTemplate<int> gets exported.
847 struct __declspec(dllexport) DerivedFromTemplate : public ClassTemplate<int> {};
848 USEMEMFUNC(DerivedFromTemplate, func)
849 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?func@?$ClassTemplate@H@@QAEXXZ"
850 // G32-DAG: define linkonce_odr x86_thiscallcc void @_ZN13ClassTemplateIiE4funcEv
851 
852 // ExportedTemplate is explicitly exported.
853 struct __declspec(dllexport) DerivedFromExportedTemplate : public ExportedClassTemplate<int> {};
854 USEMEMFUNC(DerivedFromExportedTemplate, func)
855 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?func@?$ExportedClassTemplate@H@@QAEXXZ"
856 // G32-DAG: define weak_odr dllexport x86_thiscallcc void @_ZN21ExportedClassTemplateIiE4funcEv
857 
858 // ImportedClassTemplate is explicitly imported.
859 struct __declspec(dllexport) DerivedFromImportedTemplate : public ImportedClassTemplate<int> {};
860 USEMEMFUNC(DerivedFromImportedTemplate, func)
861 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"\01?func@?$ImportedClassTemplate@H@@QAEXXZ"
862 // G32-DAG: declare dllimport x86_thiscallcc void @_ZN21ImportedClassTemplateIiE4funcEv
863 
864 // Base class already implicitly instantiated without dll attribute.
865 struct DerivedFromTemplateD : public ClassTemplate<double> {};
866 struct __declspec(dllexport) DerivedFromTemplateD2 : public ClassTemplate<double> {};
867 USEMEMFUNC(DerivedFromTemplateD2, func)
868 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?func@?$ClassTemplate@N@@QAEXXZ"
869 // G32-DAG: define linkonce_odr x86_thiscallcc void @_ZN13ClassTemplateIdE4funcEv
870 
871 // MS: Base class already instantiated with different dll attribute.
872 struct __declspec(dllimport) DerivedFromTemplateB : public ClassTemplate<bool> {};
873 struct __declspec(dllexport) DerivedFromTemplateB2 : public ClassTemplate<bool> {};
874 USEMEMFUNC(DerivedFromTemplateB2, func)
875 // M32-DAG: {{declare|define available_externally}} dllimport x86_thiscallcc void @"\01?func@?$ClassTemplate@_N@@QAEXXZ"
876 // G32-DAG: define linkonce_odr x86_thiscallcc void @_ZN13ClassTemplateIbE4funcEv
877 
878 // Base class already specialized without dll attribute.
879 struct __declspec(dllexport) DerivedFromExplicitlySpecializedTemplate : public ExplicitlySpecializedTemplate<int> {};
880 USEMEMFUNC(DerivedFromExplicitlySpecializedTemplate, func)
881 // M32-DAG: define x86_thiscallcc void @"\01?func@?$ExplicitlySpecializedTemplate@H@@QAEXXZ"
882 // G32-DAG: define x86_thiscallcc void @_ZN29ExplicitlySpecializedTemplateIiE4funcEv
883 
884 // Base class alredy specialized with export attribute.
885 struct __declspec(dllexport) DerivedFromExplicitlyExportSpecializedTemplate : public ExplicitlyExportSpecializedTemplate<int> {};
886 USEMEMFUNC(DerivedFromExplicitlyExportSpecializedTemplate, func)
887 // M32-DAG: define dllexport x86_thiscallcc void @"\01?func@?$ExplicitlyExportSpecializedTemplate@H@@QAEXXZ"
888 // G32-DAG: define dllexport x86_thiscallcc void @_ZN35ExplicitlyExportSpecializedTemplateIiE4funcEv
889 
890 // Base class already specialized with import attribute.
891 struct __declspec(dllexport) DerivedFromExplicitlyImportSpecializedTemplate : public ExplicitlyImportSpecializedTemplate<int> {};
892 USEMEMFUNC(DerivedFromExplicitlyImportSpecializedTemplate, func)
893 // M32-DAG: declare dllimport x86_thiscallcc void @"\01?func@?$ExplicitlyImportSpecializedTemplate@H@@QAEXXZ"
894 // G32-DAG: declare dllimport x86_thiscallcc void @_ZN35ExplicitlyImportSpecializedTemplateIiE4funcEv
895 
896 // Base class already instantiated without dll attribute.
897 struct __declspec(dllexport) DerivedFromExplicitlyInstantiatedTemplate : public ExplicitlyInstantiatedTemplate<int> {};
898 USEMEMFUNC(DerivedFromExplicitlyInstantiatedTemplate, func)
899 // M32-DAG: define weak_odr x86_thiscallcc void @"\01?func@?$ExplicitlyInstantiatedTemplate@H@@QAEXXZ"
900 // G32-DAG: define weak_odr x86_thiscallcc void @_ZN30ExplicitlyInstantiatedTemplateIiE4funcEv
901 
902 // Base class already instantiated with export attribute.
903 struct __declspec(dllexport) DerivedFromExplicitlyExportInstantiatedTemplate : public ExplicitlyExportInstantiatedTemplate<int> {};
904 USEMEMFUNC(DerivedFromExplicitlyExportInstantiatedTemplate, func)
905 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?func@?$ExplicitlyExportInstantiatedTemplate@H@@QAEXXZ"
906 // G32-DAG: define weak_odr dllexport x86_thiscallcc void @_ZN36ExplicitlyExportInstantiatedTemplateIiE4funcEv
907 
908 // Base class already instantiated with import attribute.
909 struct __declspec(dllexport) DerivedFromExplicitlyImportInstantiatedTemplate : public ExplicitlyImportInstantiatedTemplate<int> {};
910 USEMEMFUNC(DerivedFromExplicitlyImportInstantiatedTemplate, func)
911 // M32-DAG: declare dllimport x86_thiscallcc void @"\01?func@?$ExplicitlyImportInstantiatedTemplate@H@@QAEXXZ"
912 // G32-DAG: declare dllimport x86_thiscallcc void @_ZN36ExplicitlyImportInstantiatedTemplateIiE4funcEv
913 
914 // MS: A dll attribute propagates through multiple levels of instantiation.
915 template <typename T> struct TopClass { void func() {} };
916 template <typename T> struct MiddleClass : public TopClass<T> { };
917 struct __declspec(dllexport) BottomClass : public MiddleClass<int> { };
918 USEMEMFUNC(BottomClass, func)
919 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?func@?$TopClass@H@@QAEXXZ"
920 // G32-DAG: define linkonce_odr x86_thiscallcc void @_ZN8TopClassIiE4funcEv
921 
922 template <typename T> struct ExplicitInstantiationDeclTemplateBase { void func() {} };
923 extern template struct ExplicitInstantiationDeclTemplateBase<int>;
924 struct __declspec(dllexport) DerivedFromExplicitInstantiationDeclTemplateBase : public ExplicitInstantiationDeclTemplateBase<int> {};
925 template struct ExplicitInstantiationDeclTemplateBase<int>;
926 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?func@?$ExplicitInstantiationDeclTemplateBase@H@@QAEXXZ"
927 // G32-DAG: define weak_odr x86_thiscallcc void @_ZN37ExplicitInstantiationDeclTemplateBaseIiE4funcEv
928 
929 template <typename T> struct ExplicitInstantiationDeclTemplateBase2 { void func() {} };
930 extern template struct ExplicitInstantiationDeclTemplateBase2<int>;
931 struct __declspec(dllexport) DerivedFromExplicitInstantiationDeclTemplateBase2 : public ExplicitInstantiationDeclTemplateBase2<int> {};
932 template struct __declspec(dllimport) ExplicitInstantiationDeclTemplateBase2<int>;
933 USEMEMFUNC(ExplicitInstantiationDeclTemplateBase2<int>, func)
934 // M32-DAG: define weak_odr dllexport x86_thiscallcc void @"\01?func@?$ExplicitInstantiationDeclTemplateBase2@H@@QAEXXZ"
935 // G32-DAG: define weak_odr x86_thiscallcc void @_ZN38ExplicitInstantiationDeclTemplateBase2IiE4funcEv
936