[LLVMdev] Proposal: type uniquing of debug info for LTO

[David Blaikie]

> The reason I want a flag is to avoid the need to update the existing testing
> cases while this is a work in progress.
> I believe migrating one field means updating the existing testing cases?

It would, yes - and that's how you'd get coverage to know your change
was stable. You'll have to update all the tests eventually anyway &
doing so incrementally isn't substantially more expensive in my
experience. Perhaps there's something unique to this migration that
would make it so?