1// RUN: %clang_cc1 -triple i686-win32     -fsyntax-only -verify -std=c99 %s
2// RUN: %clang_cc1 -triple x86_64-win32   -fsyntax-only -verify -std=c11 %s
3// RUN: %clang_cc1 -triple i686-mingw32   -fsyntax-only -verify -std=c11 %s
4// RUN: %clang_cc1 -triple x86_64-mingw32 -fsyntax-only -verify -std=c99 %s
5
6// Invalid usage.
7__declspec(dllimport) typedef int typedef1; // expected-warning{{'dllimport' attribute only applies to variables and functions}}
8typedef __declspec(dllimport) int typedef2; // expected-warning{{'dllimport' attribute only applies to variables and functions}}
9typedef int __declspec(dllimport) typedef3; // expected-warning{{'dllimport' attribute only applies to variables and functions}}
10typedef __declspec(dllimport) void (*FunTy)(); // expected-warning{{'dllimport' attribute only applies to variables and functions}}
11enum __declspec(dllimport) Enum { EnumVal }; // expected-warning{{'dllimport' attribute only applies to variables and functions}}
12struct __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;
25int **__attribute__((dllimport))* GlobalDeclChunkAttr;
26int GlobalDeclAttr __attribute__((dllimport));
27
28// Address of variables can't be used for initialization in C language modes.
29int *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}}
34int __declspec(dllimport) GlobalInit2 = 1; // expected-error{{definition of dllimport data}}
35
36// Declare, then reject definition.
37__declspec(dllimport) extern int ExternGlobalDeclInit; // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
38int ExternGlobalDeclInit = 1; // expected-warning{{'ExternGlobalDeclInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
39
40__declspec(dllimport) int GlobalDeclInit; // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
41int GlobalDeclInit = 1; // expected-warning{{'GlobalDeclInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
42
43int *__attribute__((dllimport)) GlobalDeclChunkAttrInit; // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
44int *GlobalDeclChunkAttrInit = 0; // expected-warning{{'GlobalDeclChunkAttrInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
45
46int GlobalDeclAttrInit __attribute__((dllimport)); // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
47int GlobalDeclAttrInit = 1; // expected-warning{{'GlobalDeclAttrInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
48
49// Redeclarations
50__declspec(dllimport) extern int GlobalRedecl1;
51__declspec(dllimport) extern int GlobalRedecl1;
52
53__declspec(dllimport) int GlobalRedecl2a;
54__declspec(dllimport) int GlobalRedecl2a;
55
56int *__attribute__((dllimport)) GlobalRedecl2b;
57int *__attribute__((dllimport)) GlobalRedecl2b;
58
59int GlobalRedecl2c __attribute__((dllimport));
60int GlobalRedecl2c __attribute__((dllimport));
61
62// NB: MSVC issues a warning and makes GlobalRedecl3 dllexport. We follow GCC
63// and drop the dllimport with a warning.
64__declspec(dllimport) extern int GlobalRedecl3; // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
65                      extern int GlobalRedecl3; // expected-warning{{'GlobalRedecl3' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
66
67                      extern int GlobalRedecl4; // expected-note{{previous declaration is here}}
68__declspec(dllimport) extern int GlobalRedecl4; // expected-error{{redeclaration of 'GlobalRedecl4' cannot add 'dllimport' attribute}}
69
70// External linkage is required.
71__declspec(dllimport) static int StaticGlobal; // expected-error{{'StaticGlobal' must have external linkage when declared 'dllimport'}}
72
73// Import in local scope.
74__declspec(dllimport) float LocalRedecl1; // expected-note{{previous definition is here}}
75__declspec(dllimport) float LocalRedecl2; // expected-note{{previous definition is here}}
76__declspec(dllimport) float LocalRedecl3; // expected-note{{previous definition is here}}
77void functionScope() {
78  __declspec(dllimport) int LocalRedecl1; // expected-error{{redefinition of 'LocalRedecl1' with a different type: 'int' vs 'float'}}
79  int *__attribute__((dllimport)) LocalRedecl2; // expected-error{{redefinition of 'LocalRedecl2' with a different type: 'int *' vs 'float'}}
80  int LocalRedecl3 __attribute__((dllimport)); // expected-error{{redefinition of 'LocalRedecl3' with a different type: 'int' vs 'float'}}
81
82  __declspec(dllimport)        int LocalVarDecl;
83  __declspec(dllimport)        int LocalVarDef = 1; // expected-error{{definition of dllimport data}}
84  __declspec(dllimport) extern int ExternLocalVarDecl;
85  __declspec(dllimport) extern int ExternLocalVarDef = 1; // expected-error{{definition of dllimport data}}
86  __declspec(dllimport) static int StaticLocalVar; // expected-error{{'StaticLocalVar' must have external linkage when declared 'dllimport'}}
87}
88
89
90
91//===----------------------------------------------------------------------===//
92// Functions
93//===----------------------------------------------------------------------===//
94
95// Import function declaration. Check different placements.
96__attribute__((dllimport)) void decl1A(); // Sanity check with __attribute__
97__declspec(dllimport)      void decl1B();
98
99void __attribute__((dllimport)) decl2A();
100void __declspec(dllimport)      decl2B();
101
102// Address of functions can be used for initialization in C language modes.
103// However, the address of the thunk wrapping the function is used instead of
104// the address in the import address table.
105void (*FunForInit)() = &decl2A;
106
107// Not allowed on function definitions.
108__declspec(dllimport) void def() {} // expected-error{{dllimport cannot be applied to non-inline function definition}}
109
110// Import inline function.
111__declspec(dllimport) inline void inlineFunc1() {}
112inline void __attribute__((dllimport)) inlineFunc2() {}
113
114// Redeclarations
115__declspec(dllimport) void redecl1();
116__declspec(dllimport) void redecl1();
117
118// NB: MSVC issues a warning and makes redecl2/redecl3 dllexport. We follow GCC
119// and drop the dllimport with a warning.
120__declspec(dllimport) void redecl2(); // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
121                      void redecl2(); // expected-warning{{'redecl2' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
122
123__declspec(dllimport) void redecl3(); // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
124                      void redecl3() {} // expected-warning{{'redecl3' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
125
126                      void redecl4(); // expected-note{{previous declaration is here}}
127__declspec(dllimport) void redecl4(); // expected-error{{redeclaration of 'redecl4' cannot add 'dllimport' attribute}}
128
129// Inline redeclarations are fine.
130__declspec(dllimport) void redecl5();
131                      inline void redecl5() {}
132
133                      void redecl6(); // expected-note{{previous declaration is here}}
134__declspec(dllimport) inline void redecl6() {} // expected-error{{redeclaration of 'redecl6' cannot add 'dllimport' attribute}}
135
136// External linkage is required.
137__declspec(dllimport) static int staticFunc(); // expected-error{{'staticFunc' must have external linkage when declared 'dllimport'}}
138