On Fri, 17 Nov 2017, DJ Delorie wrote:
Richard Biener <richard.guenther@gmail.com> writes:
The question is what ptrdiff_t is for a specific address space. Or
rather if that type may be dependent on the address space or if we can
always use that of the default address space.
Some targets have a "far" address space that's bigger than the default.
rl78 for example has a 16-bit default pointer and a 32-bit far pointer.
Well, that's outside the scope of how TR 18037 defines the address space
feature, if ptrdiff_t is 16-bit. But it should still have nothing to do
with this patch as long as the patch keeps the result of the subtraction
having the same type it does at present.