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Add full dllimport / dllexport support: both sema checks and codegen.

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Patch by Ilya Okonsky

llvm-svn: 61437
This commit is contained in:
Anton Korobeynikov
2008-12-26 00:52:02 +00:00
parent 3112c877c1
commit d72f47aa05
7 changed files with 135 additions and 15 deletions
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27
clang/lib/CodeGen/CodeGenModule.cpp
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@@ -218,17 +218,30 @@ static void SetGlobalValueAttributes(const Decl *D,
// approximation of what we really want.
if (!ForDefinition) {
// Only a few attributes are set on declarations.
if (D->getAttr<DLLImportAttr>())
GV->setLinkage(llvm::Function::DLLImportLinkage);
if (D->getAttr<DLLImportAttr>()) {
// The dllimport attribute is overridden by a subsequent declaration as
// dllexport.
if (!D->getAttr<DLLExportAttr>())
// dllimport attribute can be applied only to function decls, not to
// definitions.
if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
if (!FD->getBody())
GV->setLinkage(llvm::Function::DLLImportLinkage);
} else
GV->setLinkage(llvm::Function::DLLImportLinkage);
}
} else {
if (IsInternal) {
GV->setLinkage(llvm::Function::InternalLinkage);
} else {
if (D->getAttr<DLLImportAttr>())
GV->setLinkage(llvm::Function::DLLImportLinkage);
else if (D->getAttr<DLLExportAttr>())
GV->setLinkage(llvm::Function::DLLExportLinkage);
else if (D->getAttr<WeakAttr>() || IsInline)
if (D->getAttr<DLLExportAttr>()) {
if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
// The dllexport attribute is ignored for undefined symbols.
if (FD->getBody())
GV->setLinkage(llvm::Function::DLLExportLinkage);
} else
GV->setLinkage(llvm::Function::DLLExportLinkage);
} else if (D->getAttr<WeakAttr>() || IsInline)
GV->setLinkage(llvm::Function::WeakLinkage);
}
}