[Bug tree-optimization/96923] Failure to optimize a select-related bool pattern to or+not

[gabravier at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96923

--- Comment #1 from Gabriel Ravier <gabravier at gmail dot com> ---
_Bool f2(_Bool a, _Bool b)
{
    return a ? !b : 1;
}

This similar pattern can be optimized to `return !(a & b);`. This
transformation is done by LLVM, but not by GCC.