[m-rev.] for review: a pass for computing type representations

[Julien Fischer]

Hi Zoltan,

On Tue, 30 Jan 2018, Zoltan Somogyi wrote:

>> I can't give more than a superficial review but deciding type
>> representations in a single pass is obviously a good idea.
>
> Thank you for the review above.
>
> Julien, would you be willing to review it, preferably tomorrow?
> An updated diff is attached. If not, I would prefer to commit it
> without a thorough review, so I can start working on the many
> "XXX TYPE_REPN" added by this diff.

I had a look through it this morning and I'm happy for you
to commit it now.  I'll try to do a more thorough review this
evening.

Julien.