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.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218159 91177308-0d34-0410-b5e6-96231b3b80d8
Dario Domizioli