[Bug tree-optimization/122104] Incorrect range after widening_mul creating MUL_OVERFLOW

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122104

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2025-10-01
                 CC|                            |jakub at gcc dot gnu.org
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed.  It's match_arith_overflow short-cutting the compare but not
removing affectes flow sensitive info (CFG cleanup does not do this for you and
I think that is correct - you changed the semantics and CFG cleanup doesn't
know).

This code was added by Jakub.