[Bug middle-end/124552] [16 Regression] fn->copyid_alloc is never released

[kugan at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124552

--- Comment #3 from kugan at gcc dot gnu.org ---
Sorry for this. IMO your fix is the correct one.
We allocate this for functions where there are loop versioning or unrolling.
Since it can happen in RTL also, this has to be done late.

If you prefer I can add an option to disable this.