[PATCH] D13666: Add an (optional) identification block in the bitcode

[Rafael Espíndola via llvm-commits]

>
> If the point is to stick with major release, that’s fine.
> I was reluctant to manually bump the epoch with *each* release (i.e. minor
> as well).

The reason I prefer having a single number is that it is them
completely arbitrary what it means. Once we have it we can choose to
bump it every release, major release or interesting point in history
(just after switching to typeless pointers for example).

Cheers,
Rafael