[Bug middle-end/121222] add support for -fsanitize-coverage=stack-depth

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121222

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
How is it different from doing a similar thing from mcount?