[Bug tree-optimization/125707] (~a)>>a should be simplified into -1 for signed types

[kaelfandrew at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125707

--- Comment #7 from Kael Franco <kaelfandrew at gmail dot com> ---
https://gcc.gnu.org/pipermail/gcc-patches/2026-June/720110.html