[Bug tree-optimization/117204] [12/13/14/15 regression] After r12-2132-ga1108556677, bogus -Warray-bounds warnings in std::vector::back()

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117204

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Note the pattern that GCC's (internal) memory alloctor uses is 0xaf and 0xa5.
0xaf is for the initial value and 0xa5 is after it gets freed. But this is only
with checking enabled.