[Bug tree-optimization/82042] signed integer overflow in ao_ref_init_from_ptr_and_size

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82042

--- Comment #4 from Martin Liška <marxin at gcc dot gnu.org> ---
I see, thanks for clarification. I'm going to send patch for the remaining
bits, hopefully I made it in a right way.