[Bug c/61240] [4.8/4.9/5 Regression] Incorrect warning "integer overflow in expression" on pointer-pointer subtraction

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61240

--- Comment #9 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
I view this as a problem that we fold too early - I think this bug (and its
kin) are to be solved with delayed folding.