[Bug sanitizer/69656] -fsanitize=undefined compile time hog

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69656

--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Does clang++ even have objsize instrumentation?  Do we ever optimize those
calls?