[Bug tree-optimization/126735] [16/17 Regression] -Wmaybe-uninitialized false positive under -fsanitize=thread -O1

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126735

--- Comment #1 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Note -fsanitize is documented as interfering with warnings especially
uninitialized ones