On 05-05-2012 06:57, Alex Rønne Petersen wrote:
Hi,
I don't think the language really makes it clear whether overflows and
underflows are well-defined. Do we guarantee that for any integral type
T, T.max + 1 == T.min and T.min - 1 == T.max?
This is relevant in particular for GDC and LDC since they target a lot
of weird architectures.
Bumping this as we still need to make a decision about this. As recently
as yesterday, someone on the GCC mailing list posted a complaint about
an optimization pass that assumed undefined semantics for overflow. We
need to have a stance about this, since GDC is going into mainline GCC soon.
--
- Alex
