606bd6dcc5
It turns out that MinGW never dllimports of exports inline functions. This means that code compiled with Clang would fail to link with MinGW-compiled libraries since we might try to import functions that are not imported. To fix this, make Clang never dllimport inline functions when targeting MinGW. llvm-svn: 221154
171 lines
9.3 KiB
C
171 lines
9.3 KiB
C
// RUN: %clang_cc1 -triple i686-win32 -fsyntax-only -verify -std=c99 -DMS %s
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// RUN: %clang_cc1 -triple x86_64-win32 -fsyntax-only -verify -std=c11 -DMS %s
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// RUN: %clang_cc1 -triple i686-mingw32 -fsyntax-only -verify -std=c11 -DGNU %s
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// RUN: %clang_cc1 -triple x86_64-mingw32 -fsyntax-only -verify -std=c99 -DGNU %s
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// Invalid usage.
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__declspec(dllimport) typedef int typedef1; // expected-warning{{'dllimport' attribute only applies to variables and functions}}
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typedef __declspec(dllimport) int typedef2; // expected-warning{{'dllimport' attribute only applies to variables and functions}}
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typedef int __declspec(dllimport) typedef3; // expected-warning{{'dllimport' attribute only applies to variables and functions}}
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typedef __declspec(dllimport) void (*FunTy)(); // expected-warning{{'dllimport' attribute only applies to variables and functions}}
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enum __declspec(dllimport) Enum { EnumVal }; // expected-warning{{'dllimport' attribute only applies to variables and functions}}
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struct __declspec(dllimport) Record {}; // expected-warning{{'dllimport' attribute only applies to variables and functions}}
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//===----------------------------------------------------------------------===//
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// Globals
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//===----------------------------------------------------------------------===//
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// Import declaration.
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__declspec(dllimport) extern int ExternGlobalDecl;
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// dllimport implies a declaration.
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__declspec(dllimport) int GlobalDecl;
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int **__attribute__((dllimport))* GlobalDeclChunkAttr;
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int GlobalDeclAttr __attribute__((dllimport));
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// Address of variables can't be used for initialization in C language modes.
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int *VarForInit = &GlobalDecl; // expected-error{{initializer element is not a compile-time constant}}
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// Not allowed on definitions.
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__declspec(dllimport) extern int ExternGlobalInit = 1; // expected-error{{definition of dllimport data}}
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__declspec(dllimport) int GlobalInit1 = 1; // expected-error{{definition of dllimport data}}
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int __declspec(dllimport) GlobalInit2 = 1; // expected-error{{definition of dllimport data}}
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// Declare, then reject definition.
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__declspec(dllimport) extern int ExternGlobalDeclInit; // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
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int ExternGlobalDeclInit = 1; // expected-warning{{'ExternGlobalDeclInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
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__declspec(dllimport) int GlobalDeclInit; // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
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int GlobalDeclInit = 1; // expected-warning{{'GlobalDeclInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
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int *__attribute__((dllimport)) GlobalDeclChunkAttrInit; // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
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int *GlobalDeclChunkAttrInit = 0; // expected-warning{{'GlobalDeclChunkAttrInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
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int GlobalDeclAttrInit __attribute__((dllimport)); // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
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int GlobalDeclAttrInit = 1; // expected-warning{{'GlobalDeclAttrInit' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
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// Redeclarations
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__declspec(dllimport) extern int GlobalRedecl1;
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__declspec(dllimport) extern int GlobalRedecl1;
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__declspec(dllimport) int GlobalRedecl2a;
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__declspec(dllimport) int GlobalRedecl2a;
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int *__attribute__((dllimport)) GlobalRedecl2b;
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int *__attribute__((dllimport)) GlobalRedecl2b;
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int GlobalRedecl2c __attribute__((dllimport));
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int GlobalRedecl2c __attribute__((dllimport));
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// NB: MSVC issues a warning and makes GlobalRedecl3 dllexport. We follow GCC
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// and drop the dllimport with a warning.
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__declspec(dllimport) extern int GlobalRedecl3; // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
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extern int GlobalRedecl3; // expected-warning{{'GlobalRedecl3' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
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// Adding an attribute on redeclaration.
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extern int GlobalRedecl4; // expected-note{{previous declaration is here}}
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int useGlobalRedecl4() { return GlobalRedecl4; }
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__declspec(dllimport) extern int GlobalRedecl4; // expected-error{{redeclaration of 'GlobalRedecl4' cannot add 'dllimport' attribute}}
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// Allow with a warning if the decl hasn't been used yet.
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extern int GlobalRedecl5; // expected-note{{previous declaration is here}}
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__declspec(dllimport) extern int GlobalRedecl5; // expected-warning{{redeclaration of 'GlobalRedecl5' should not add 'dllimport' attribute}}
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// External linkage is required.
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__declspec(dllimport) static int StaticGlobal; // expected-error{{'StaticGlobal' must have external linkage when declared 'dllimport'}}
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// Thread local variables are invalid.
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__declspec(dllimport) __thread int ThreadLocalGlobal; // expected-error{{'ThreadLocalGlobal' cannot be thread local when declared 'dllimport'}}
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// Import in local scope.
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__declspec(dllimport) float LocalRedecl1; // expected-note{{previous definition is here}}
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__declspec(dllimport) float LocalRedecl2; // expected-note{{previous definition is here}}
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__declspec(dllimport) float LocalRedecl3; // expected-note{{previous definition is here}}
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__declspec(dllimport) float LocalRedecl4;
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void functionScope() {
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__declspec(dllimport) int LocalRedecl1; // expected-error{{redefinition of 'LocalRedecl1' with a different type: 'int' vs 'float'}}
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int *__attribute__((dllimport)) LocalRedecl2; // expected-error{{redefinition of 'LocalRedecl2' with a different type: 'int *' vs 'float'}}
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int LocalRedecl3 __attribute__((dllimport)); // expected-error{{redefinition of 'LocalRedecl3' with a different type: 'int' vs 'float'}}
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__declspec(dllimport) int LocalVarDecl;
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__declspec(dllimport) int LocalVarDef = 1; // expected-error{{definition of dllimport data}}
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__declspec(dllimport) extern int ExternLocalVarDecl;
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__declspec(dllimport) extern int ExternLocalVarDef = 1; // expected-error{{definition of dllimport data}}
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__declspec(dllimport) static int StaticLocalVar; // expected-error{{'StaticLocalVar' must have external linkage when declared 'dllimport'}}
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// Local extern redeclaration does not drop the attribute.
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extern float LocalRedecl4;
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}
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//===----------------------------------------------------------------------===//
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// Functions
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//===----------------------------------------------------------------------===//
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// Import function declaration. Check different placements.
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__attribute__((dllimport)) void decl1A(); // Sanity check with __attribute__
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__declspec(dllimport) void decl1B();
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void __attribute__((dllimport)) decl2A();
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void __declspec(dllimport) decl2B();
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// Address of functions can be used for initialization in C language modes.
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// However, the address of the thunk wrapping the function is used instead of
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// the address in the import address table.
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void (*FunForInit)() = &decl2A;
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// Not allowed on function definitions.
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__declspec(dllimport) void def() {} // expected-error{{dllimport cannot be applied to non-inline function definition}}
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// Import inline function.
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#ifdef GNU
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// expected-warning@+3{{'dllimport' attribute ignored on inline function}}
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// expected-warning@+3{{'dllimport' attribute ignored on inline function}}
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#endif
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__declspec(dllimport) inline void inlineFunc1() {}
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inline void __attribute__((dllimport)) inlineFunc2() {}
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// Redeclarations
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__declspec(dllimport) void redecl1();
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__declspec(dllimport) void redecl1();
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// NB: MSVC issues a warning and makes redecl2/redecl3 dllexport. We follow GCC
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// and drop the dllimport with a warning.
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__declspec(dllimport) void redecl2(); // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
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void redecl2(); // expected-warning{{'redecl2' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
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__declspec(dllimport) void redecl3(); // expected-note{{previous declaration is here}} expected-note{{previous attribute is here}}
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void redecl3() {} // expected-warning{{'redecl3' redeclared without 'dllimport' attribute: previous 'dllimport' ignored}}
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void redecl4(); // expected-note{{previous declaration is here}}
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void useRedecl4() { redecl4(); }
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__declspec(dllimport) void redecl4(); // expected-error{{redeclaration of 'redecl4' cannot add 'dllimport' attribute}}
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// Allow with a warning if the decl hasn't been used yet.
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void redecl5(); // expected-note{{previous declaration is here}}
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__declspec(dllimport) void redecl5(); // expected-warning{{redeclaration of 'redecl5' should not add 'dllimport' attribute}}
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// Inline redeclarations.
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#ifdef GNU
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// expected-warning@+3{{'redecl6' redeclared inline; 'dllimport' attribute ignored}}
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#endif
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__declspec(dllimport) void redecl6();
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inline void redecl6() {}
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#ifdef MS
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// expected-note@+5{{previous declaration is here}}
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// expected-warning@+5{{redeclaration of 'redecl7' should not add 'dllimport' attribute}}
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#else
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// expected-warning@+3{{'dllimport' attribute ignored on inline function}}
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#endif
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void redecl7();
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__declspec(dllimport) inline void redecl7() {}
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// External linkage is required.
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__declspec(dllimport) static int staticFunc(); // expected-error{{'staticFunc' must have external linkage when declared 'dllimport'}}
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