Hi,

This is the main patch that expands bitpos and type.length to LONGEST
and ULONGEST respectively. The change from the earlier patch is that I
have identified additional expansions based on the splint report and I
have reverted the expansion in the LEN argument for insert/remove
watchpoints since it's not necessary.

I have verified that the change does not introduce any regressions on
x86_64. This change has a couple of test cases too that pass after this
change.

Regards,
Siddhesh