| 1 | // RUN: %clang_cc1 -triple i686-win32 -fsyntax-only -fms-extensions -verify -std=c99 -DMS %s |
| 2 | // RUN: %clang_cc1 -triple x86_64-win32 -fsyntax-only -fms-extensions -verify -std=c11 -DMS %s |
| 3 | // RUN: %clang_cc1 -triple i686-mingw32 -fsyntax-only -fms-extensions -verify -std=c11 -DGNU %s |
| 4 | // RUN: %clang_cc1 -triple x86_64-mingw32 -fsyntax-only -fms-extensions -verify -std=c99 -DGNU %s |
| 5 | // RUN: %clang_cc1 -triple aarch64-win32 -fsyntax-only -fms-extensions -verify -std=c99 -DMS %s |
| 6 | |
| 7 | // Invalid usage. |
| 8 | __declspec(dllimport) typedef int typedef1; |
| 9 | // expected-warning@-1{{'dllimport' attribute only applies to functions, variables, classes, and Objective-C interfaces}} |
| 10 | typedef __declspec(dllimport) int typedef2; |
| 11 | // expected-warning@-1{{'dllimport' attribute only applies to}} |
| 12 | typedef int __declspec(dllimport) typedef3; |
| 13 | // expected-warning@-1{{'dllimport' attribute only applies to}} |
| 14 | typedef __declspec(dllimport) void (*FunTy)(); |
| 15 | // expected-warning@-1{{'dllimport' attribute only applies to}} |
| 16 | enum __declspec(dllimport) Enum { EnumVal }; |
| 17 | // expected-warning@-1{{'dllimport' attribute only applies to}} |
| 18 | struct __declspec(dllimport) Record {}; |
| 19 | // expected-warning@-1{{'dllimport' attribute only applies to}} |
| 20 | |
| 21 | |
| 22 | |
| 23 | //===----------------------------------------------------------------------===// |
| 24 | // Globals |
| 25 | //===----------------------------------------------------------------------===// |
| 26 | |
| 27 | // Import declaration. |
| 28 | __declspec(dllimport) extern int ExternGlobalDecl; |
| 29 | |
| 30 | // dllimport implies a declaration. |
| 31 | __declspec(dllimport) int GlobalDecl; |
| 32 | int **__attribute__((dllimport))* GlobalDeclChunkAttr; |
| 33 | int GlobalDeclAttr __attribute__((dllimport)); |
| 34 | |
| 35 | // Address of variables can't be used for initialization in C language modes. |
| 36 | int *VarForInit = &GlobalDecl; // expected-error{{initializer element is not a compile-time constant}} |
| 37 | |
| 38 | // Not allowed on definitions. |
| 39 | __declspec(dllimport) extern int ExternGlobalInit = 1; // expected-error{{definition of dllimport data}} |
| 40 | __declspec(dllimport) int GlobalInit1 = 1; // expected-error{{definition of dllimport data}} |
| 41 | int __declspec(dllimport) GlobalInit2 = 1; // expected-error{{definition of dllimport data}} |
| 42 | |
| 43 | // Declare, then reject definition. |
| 44 | #ifdef GNU |
| 45 | // expected-note@+2{{previous attribute is here}} |
| 46 | #endif |
| 47 | __declspec(dllimport) extern int ExternGlobalDeclInit; // expected-note{{previous declaration is here}} |
| 48 | #ifdef MS |
| 49 | // expected-warning@+4{{'ExternGlobalDeclInit' redeclared without 'dllimport' attribute: 'dllexport' attribute added}} |
| 50 | #else |
| 51 | // expected-warning@+2{{'ExternGlobalDeclInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}} |
| 52 | #endif |
| 53 | int ExternGlobalDeclInit = 1; |
| 54 | |
| 55 | #ifdef GNU |
| 56 | // expected-note@+2{{previous attribute is here}} |
| 57 | #endif |
| 58 | __declspec(dllimport) int GlobalDeclInit; // expected-note{{previous declaration is here}} |
| 59 | #ifdef MS |
| 60 | // expected-warning@+4{{'GlobalDeclInit' redeclared without 'dllimport' attribute: 'dllexport' attribute added}} |
| 61 | #else |
| 62 | // expected-warning@+2{{'GlobalDeclInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}} |
| 63 | #endif |
| 64 | int GlobalDeclInit = 1; |
| 65 | |
| 66 | #ifdef GNU |
| 67 | // expected-note@+2{{previous attribute is here}} |
| 68 | #endif |
| 69 | int *__attribute__((dllimport)) GlobalDeclChunkAttrInit; // expected-note{{previous declaration is here}} |
| 70 | #ifdef MS |
| 71 | // expected-warning@+4{{'GlobalDeclChunkAttrInit' redeclared without 'dllimport' attribute: 'dllexport' attribute added}} |
| 72 | #else |
| 73 | // expected-warning@+2{{'GlobalDeclChunkAttrInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}} |
| 74 | #endif |
| 75 | int *GlobalDeclChunkAttrInit = 0; |
| 76 | |
| 77 | #ifdef GNU |
| 78 | // expected-note@+2{{previous attribute is here}} |
| 79 | #endif |
| 80 | int GlobalDeclAttrInit __attribute__((dllimport)); // expected-note{{previous declaration is here}} |
| 81 | #ifdef MS |
| 82 | // expected-warning@+4{{'GlobalDeclAttrInit' redeclared without 'dllimport' attribute: 'dllexport' attribute added}} |
| 83 | #else |
| 84 | // expected-warning@+2{{'GlobalDeclAttrInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}} |
| 85 | #endif |
| 86 | int GlobalDeclAttrInit = 1; |
| 87 | |
| 88 | // Redeclarations |
| 89 | __declspec(dllimport) extern int GlobalRedecl1; |
| 90 | __declspec(dllimport) extern int GlobalRedecl1; |
| 91 | |
| 92 | __declspec(dllimport) int GlobalRedecl2a; |
| 93 | __declspec(dllimport) int GlobalRedecl2a; |
| 94 | |
| 95 | int *__attribute__((dllimport)) GlobalRedecl2b; |
| 96 | int *__attribute__((dllimport)) GlobalRedecl2b; |
| 97 | |
| 98 | int GlobalRedecl2c __attribute__((dllimport)); |
| 99 | int GlobalRedecl2c __attribute__((dllimport)); |
| 100 | |
| 101 | // We follow GCC and drop the dllimport with a warning. |
| 102 | __declspec(dllimport) extern int GlobalRedecl3; // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}} |
| 103 | extern int GlobalRedecl3; // expected-warning{{'GlobalRedecl3' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}} |
| 104 | |
| 105 | // Adding an attribute on redeclaration. |
| 106 | extern int GlobalRedecl4; // expected-note{{previous declaration is here}} |
| 107 | int useGlobalRedecl4() { return GlobalRedecl4; } |
| 108 | __declspec(dllimport) extern int GlobalRedecl4; // expected-error{{redeclaration of 'GlobalRedecl4' cannot add 'dllimport' attribute}} |
| 109 | |
| 110 | // Allow with a warning if the decl hasn't been used yet. |
| 111 | extern int GlobalRedecl5; // expected-note{{previous declaration is here}} |
| 112 | __declspec(dllimport) extern int GlobalRedecl5; // expected-warning{{redeclaration of 'GlobalRedecl5' should not add 'dllimport' attribute}} |
| 113 | |
| 114 | |
| 115 | // External linkage is required. |
| 116 | __declspec(dllimport) static int StaticGlobal; // expected-error{{'StaticGlobal' must have external linkage when declared 'dllimport'}} |
| 117 | |
| 118 | // Thread local variables are invalid. |
| 119 | __declspec(dllimport) __thread int ThreadLocalGlobal; // expected-error{{'ThreadLocalGlobal' cannot be thread local when declared 'dllimport'}} |
| 120 | |
| 121 | // Import in local scope. |
| 122 | __declspec(dllimport) float LocalRedecl1; // expected-note{{previous declaration is here}} |
| 123 | __declspec(dllimport) float LocalRedecl2; // expected-note{{previous declaration is here}} |
| 124 | __declspec(dllimport) float LocalRedecl3; // expected-note{{previous declaration is here}} |
| 125 | __declspec(dllimport) float LocalRedecl4; |
| 126 | void functionScope() { |
| 127 | __declspec(dllimport) int LocalRedecl1; // expected-error{{redeclaration of 'LocalRedecl1' with a different type: 'int' vs 'float'}} |
| 128 | int *__attribute__((dllimport)) LocalRedecl2; // expected-error{{redeclaration of 'LocalRedecl2' with a different type: 'int *' vs 'float'}} |
| 129 | int LocalRedecl3 __attribute__((dllimport)); // expected-error{{redeclaration of 'LocalRedecl3' with a different type: 'int' vs 'float'}} |
| 130 | |
| 131 | __declspec(dllimport) int LocalVarDecl; |
| 132 | __declspec(dllimport) int LocalVarDef = 1; // expected-error{{definition of dllimport data}} |
| 133 | __declspec(dllimport) extern int ExternLocalVarDecl; |
| 134 | __declspec(dllimport) extern int ExternLocalVarDef = 1; // expected-error{{definition of dllimport data}} |
| 135 | __declspec(dllimport) static int StaticLocalVar; // expected-error{{'StaticLocalVar' must have external linkage when declared 'dllimport'}} |
| 136 | |
| 137 | // Local extern redeclaration does not drop the attribute. |
| 138 | extern float LocalRedecl4; |
| 139 | } |
| 140 | |
| 141 | |
| 142 | |
| 143 | //===----------------------------------------------------------------------===// |
| 144 | // Functions |
| 145 | //===----------------------------------------------------------------------===// |
| 146 | |
| 147 | // Import function declaration. Check different placements. |
| 148 | __attribute__((dllimport)) void decl1A(); // Sanity check with __attribute__ |
| 149 | __declspec(dllimport) void decl1B(); |
| 150 | |
| 151 | void __attribute__((dllimport)) decl2A(); |
| 152 | void __declspec(dllimport) decl2B(); |
| 153 | |
| 154 | // Address of functions can be used for initialization in C language modes. |
| 155 | // However, the address of the thunk wrapping the function is used instead of |
| 156 | // the address in the import address table. |
| 157 | void (*FunForInit)() = &decl2A; |
| 158 | |
| 159 | // Not allowed on function definitions. |
| 160 | __declspec(dllimport) void def() {} // expected-error{{dllimport cannot be applied to non-inline function definition}} |
| 161 | |
| 162 | // Import inline function. |
| 163 | #ifdef GNU |
| 164 | // expected-warning@+3{{'dllimport' attribute ignored on inline function}} |
| 165 | // expected-warning@+3{{'dllimport' attribute ignored on inline function}} |
| 166 | #endif |
| 167 | __declspec(dllimport) inline void inlineFunc1() {} |
| 168 | inline void __attribute__((dllimport)) inlineFunc2() {} |
| 169 | |
| 170 | // Redeclarations |
| 171 | __declspec(dllimport) void redecl1(); |
| 172 | __declspec(dllimport) void redecl1(); |
| 173 | |
| 174 | __declspec(dllimport) void redecl2(); // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}} |
| 175 | void redecl2(); // expected-warning{{'redecl2' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}} |
| 176 | |
| 177 | #ifdef GNU |
| 178 | // expected-note@+2{{previous attribute is here}} |
| 179 | #endif |
| 180 | __declspec(dllimport) void redecl3(); // expected-note{{previous declaration is here}} |
| 181 | // NB: Both MSVC and Clang issue a warning and make redecl3 dllexport. |
| 182 | #ifdef MS |
| 183 | // expected-warning@+4{{'redecl3' redeclared without 'dllimport' attribute: 'dllexport' attribute added}} |
| 184 | #else |
| 185 | // expected-warning@+2{{'redecl3' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}} |
| 186 | #endif |
| 187 | void redecl3() {} |
| 188 | |
| 189 | void redecl4(); // expected-note{{previous declaration is here}} |
| 190 | void useRedecl4() { redecl4(); } |
| 191 | __declspec(dllimport) void redecl4(); // expected-warning{{redeclaration of 'redecl4' should not add 'dllimport' attribute}} |
| 192 | |
| 193 | // Allow with a warning if the decl hasn't been used yet. |
| 194 | void redecl5(); // expected-note{{previous declaration is here}} |
| 195 | __declspec(dllimport) void redecl5(); // expected-warning{{redeclaration of 'redecl5' should not add 'dllimport' attribute}} |
| 196 | |
| 197 | |
| 198 | // Inline redeclarations. |
| 199 | #ifdef GNU |
| 200 | // expected-warning@+3{{'redecl6' redeclared inline; 'dllimport' attribute ignored}} |
| 201 | #endif |
| 202 | __declspec(dllimport) void redecl6(); |
| 203 | inline void redecl6() {} |
| 204 | |
| 205 | #ifdef MS |
| 206 | // expected-note@+5{{previous declaration is here}} |
| 207 | // expected-warning@+5{{redeclaration of 'redecl7' should not add 'dllimport' attribute}} |
| 208 | #else |
| 209 | // expected-warning@+3{{'dllimport' attribute ignored on inline function}} |
| 210 | #endif |
| 211 | void redecl7(); |
| 212 | __declspec(dllimport) inline void redecl7() {} |
| 213 | |
| 214 | // PR31069: Don't crash trying to merge attributes for redeclaration of invalid |
| 215 | // decl. |
| 216 | void __declspec(dllimport) redecl8(unknowntype X); // expected-error{{unknown type name 'unknowntype'}} |
| 217 | void redecl8(unknowntype X) { } // expected-error{{unknown type name 'unknowntype'}} |
| 218 | // PR32021: Similarly, don't crash trying to merge attributes from a valid |
| 219 | // decl to an invalid redeclaration. |
| 220 | void __declspec(dllimport) redecl9(void); // expected-note{{previous declaration is here}} |
| 221 | int redecl9(void) {} // expected-error{{conflicting types for 'redecl9'}} |
| 222 | |
| 223 | // External linkage is required. |
| 224 | __declspec(dllimport) static int staticFunc(); // expected-error{{'staticFunc' must have external linkage when declared 'dllimport'}} |
| 225 | |
| 226 | // Static locals don't count as having external linkage. |
| 227 | void staticLocalFunc() { |
| 228 | __declspec(dllimport) static int staticLocal; // expected-error{{'staticLocal' must have external linkage when declared 'dllimport'}} |
| 229 | } |
| 230 | |