[clang] [clang] add unnamed_addr function attribute (PR #92499)

[YAMAMOTO Takashi via cfe-commits]

yamt wrote:

> If we're going to do this, it should probably also work for constants.
> 
> Also, I think I'd prefer to sort out the situation with the C++ standard's rules for constant merging before we start extending those rules. See #63628.

may i update this to cover constants as well?
or, it would be a waste of effort as it seems no chances to be merged?


https://github.com/llvm/llvm-project/pull/92499