[Ada] Integer repesentation in the Ada FE

[Robert Dewar]

Bernd Trog wrote:

> Is the handling of the value -32768 optimized in any way, while
> -32769 and -32767 are not optimized in the same way?

No, see below
> 
>> For interest, why do you ask?
> 
> I'm chasing a bug that only appeares when Standard.Integer'Size is 16:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26849

Trying to make the compiler work with standard integer size of
16 will be very difficult I fear. It really assumes an integer
size of at least 32 I would guess, though of course type Uint
does not depend on the format of Integer.

FOr a discussion of the representation of Uint, see the private
part of Uintp.
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