[llvm] [llvm] prepare explicit template instantiations in llvm/CodeGen for DLL export annotations (PR #140653)

[Andrew Rogers via llvm-commits]

andrurogerz wrote:

@compnerd, @vgvassilev would one of you mind having a look? This change is intended to be a noop as it is right now, but it will eliminate warnings that appear after export annotations are added.

https://github.com/llvm/llvm-project/pull/140653