[Bug tree-optimization/121735] Optimization level O2 triggers false warning about uninitialized usage whereas O1 and O3 are fine.

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121735

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
My bet is the first iteration is peeled for -O3 which is why it does not warn
there.