[Bug tree-optimization/106922] [12 Regression] Bogus uninitialized warning on boost::optional<>>, missed FRE

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106922

--- Comment #24 from Richard Biener <rguenth at gcc dot gnu.org> ---
Note I'm still pondering whether to backport the VN enhancement, for now I've
backported the VN/PRE optimization regression fix.