RE: [PATCH 6/7] [ARC] Deprecate mexpand-adddi option.

[Claudiu Zissulescu]

> This looks fine, though the commit message tells me it's not a good
> idea, but it would be nice to know _why_ it's not good.  Might be nice
> to know for future reference.

Committed with additional comments. Thank you,
Claudiu