[Bug tree-optimization/116133] Missing mult_overflow detection for aarch64

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116133

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2024-07-29
           Assignee|unassigned at gcc dot gnu.org      |pinskia at gcc dot gnu.org

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
```
      || (code == MULT_EXPR
          && optab_handler (cast_stmt ? mulv4_optab : umulv4_optab,
                            TYPE_MODE (type)) == CODE_FOR_nothing
          && (use_seen
              || cast_stmt
              || !can_mult_highpart_p (TYPE_MODE (type), true))))
```

This misses that we could also handle it via [us]mul_widen_optab too.