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