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Fix ctor/dtor aliases losing 'dllexport' (for Itanium ABI)

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This patch makes sure that the dllexport attribute is transferred to the alias when such alias is created. It only affects the Itanium ABI because for the MSVC ABI a workaround is in place to not generate aliases of dllexport ctors/dtors.
A new CodeGenModule function is provided, CodeGenModule::setAliasAttributes, to factor the code for transferring attributes to aliases.

llvm-svn: 218159
This commit is contained in:
Dario Domizioli
2014-09-19 22:06:24 +00:00
parent 44a7c7f1aa
commit c4fb8ca7aa
4 changed files with 35 additions and 1 deletions
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10
clang/lib/CodeGen/CodeGenModule.cpp
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@@ -786,6 +786,16 @@ void CodeGenModule::SetCommonAttributes(const Decl *D,
addUsedGlobal(GV);
}
void CodeGenModule::setAliasAttributes(const Decl *D,
llvm::GlobalValue *GV) {
SetCommonAttributes(D, GV);
// Process the dllexport attribute based on whether the original definition
// (not necessarily the aliasee) was exported.
if (D->hasAttr<DLLExportAttr>())
GV->setDLLStorageClass(llvm::GlobalValue::DLLExportStorageClass);
}
void CodeGenModule::setNonAliasAttributes(const Decl *D,
llvm::GlobalObject *GO) {
SetCommonAttributes(D, GO);