[Bug tree-optimization/120268] Missed removing loop of setting zero when dereference pointer (memset) at -O3 -fallow-store-data-races

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120268

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2025-05-14
            Summary|Missed removing loop of     |Missed removing loop of
                   |setting zero when           |setting zero when
                   |dereference pointer         |dereference pointer
                   |(memset)                    |(memset) at -O3
                   |                            |-fallow-store-data-races
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
GCC does simplify it down to:
        if(ptr[i])
            ptr[i] = 0;

Before ldist but nothing converts that into:
ptr[i] = 0;