[Bug c/63307] [4.9/5 Regression] Cilk+ breaks -fcompare-debug bootstrap

["izamyatin at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63307

--- Comment #3 from Igor Zamyatin <izamyatin at gmail dot com> ---
(In reply to Jakub Jelinek from comment #2)

> 
> > +  vec_arglist.release();
> 
> Formatting.  You could use auto_vec, perhaps with some stack allocated
> initial buffer if you think say 16 vector elements would be typically enough.

Is it ok to have auto_vec declaration outside the routine?

> 
> Also, what about all the remaining 3 callbacks that create or may create
> decls and have the same problem?  for_local_cb, wrapper_local_cb and
> declare_one_free_variable.

These are callbacks that seem to be safe in the sense of random ordering - 
perform some 1 to 1 mapping