r218141 - In the Itanium ABI, move stuff to the comdat of variables with static init.

[Rafael Espíndola]

> An external symbol in a COMDAT should be identical in all COMDAT groups that
> it could be in.  If you can't find issue with it, I'll add it to the
> langref.

I don't think that is correct.

The group itself has to be equivalent in some sense, but each symbol
in it can be different. The example example of the variable + guard in
the same group is probably a good one.

Cheers,
Rafael