[Bug rtl-optimization/68641] undefined variables implicitly considered to be zero

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68641

--- Comment #11 from Marc Glisse <glisse at gcc dot gnu.org> ---
(In reply to Joost VandeVondele from comment #10)
> [I just checked that -Wuninitialized -Wno-maybe-uninitialized doesn't work]

That sounds like a bug. It works for me on a simple C testcase.