[Bug tree-optimization/94889] Negate function not getting optimised to bitwise not

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94889

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-08-22
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW

--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.

Note two related testcases:
int negone(int x)
{
    for(int i=0;i<sizeof(int)*8;i++)
    {
        x |= (int)1<<i;
    }
    return x;
}
int zero(int x)
{
    for(int i=0;i<sizeof(int)*8;i++)
    {
        x &= (int)1<<i;
    }
    return x;
}