[Bug middle-end/102519] [12 Regression] VRP Jump threader memory explosion

[aldyh at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102519

--- Comment #13 from Aldy Hernandez <aldyh at gcc dot gnu.org> ---
Created attachment 51520
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51520&action=edit
avoid CFG  and SSA updates when possible

The VRP threader is updating SSAs and CFG even if nothing changes.  This could
have an effect outside the time/memory budget for the threader, but it's just a
guess.

I am testing this patch and will commit it shortly.  Sorry to keep shooting in
the dark here, but could you see if this helps?