https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103633

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |pinskia at gcc dot gnu.org
   Last reconfirmed|                            |2021-12-09
           Severity|normal                      |enhancement
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
We don't recongize this either:
int f21(unsigned long x) {
    int c = 0;
    for (; x; x >>= 1) {
        c+= (x & 1);
    }
    return c;
}

Confirmed.

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