[Bug middle-end/69578] -Wuninitialized not issuing warning.

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69578

--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
It is a dup of all the uninit PRs caused by CCP turning PHI<undef, X> into X
(X=10 here).