[Bug tree-optimization/96691] Failure to optimize bitwise not+or+xor with constants to and+xor with bitwise not-ed constants

[gabravier at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96691

--- Comment #1 from Gabriel Ravier <gabravier at gmail dot com> ---
int f(int x)
{
    return (~x & 123) ^ 321;
}

A very similar transformation can be done with this code, transforming it to
`return (x & 123) ^ 314;` (according to LLVM), and a similar transformation
should be possible with other constants, though I can't identify myself the
exact transformation you'd need to generalise this to all constants.