[Bug middle-end/61409] [4.9/4.10 regression] -Wmaybe-uninitialized false-positive with -O2

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61409

--- Comment #5 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
(In reply to Paul Eggert from comment #0)
> Also, mw was used in the
> previous line, with no warning.

I think uinit uses are computed walking the CFG backwards, and only one use is
reported per variable.