[Bug lto/90889] snapshot 20190614 fails to build Ada with LTO

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90889

--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Perhaps it may make sense to compile the non-compliant units with
> -fno-lto so we stay safe?

I'll have a look, but that's probably overkill.

> (while working on alias oracle I would like to be able to LTO test Ada
> since it has some specialities in this area)

Makes sense of course.  The gnat.dg testsuite should already contain testcases
for the modifications made to the middle-end in order to help Ada.