[Bug c/70779] -trapv does not generate trapping vode for integer conversions

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70779

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
conversions from unsigned to signed are not undefined but implementation
defined
and not covered by -ftrapv.  Instead GCC documents its implementation defined
behavior as modulo-2 reduction.