erichkeane added a comment.

>> OK. My concern is that users need to use __attribute__((used)) or something 
>> more robust if they want SVN identifiers to reliably appear in the output. 
>> Adding this flag just creates a trap that will fail once they turn on >>-O2. 
>> I'd rather not have it in the interface to avoid that user confusion.

Since the idea here is to have a global option for 'always emit these things', 
could a viable solution simply add all of these things to @llvm.used.  This 
wouldn't affect the usefulness of __attribute((used)), but could be implemented 
similarly, right?

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