[Bug sanitizer/81387] UBSAN consumes too much memory at -O2

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81387

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
There's a dup of this specific issue (workaround: -fno-ree), can't find it
right now.