Hi,

This is part 2 of the patch for bitpos expansion. This part adds
additional checks that ensure that a type is small enough to fit into
host gdb, i.e. it fits into size_t.

I have verified that the change does not introduce any regressions on
x86_64. I haven't made any test cases for this change, but I can try to
write one if it is necessary.

Regards,
Siddhesh