[PATCH] var-tracking.c: Fix possible use of uninitialized variable pre

[Richard Biener]

On Wed, Apr 29, 2020 at 5:56 PM Jeff Law <law@redhat.com> wrote:
>
> On Tue, 2020-04-28 at 11:44 +0200, Richard Biener via Gcc-patches wrote:
> >
> > Btw, does s390 have different inlining parameters somehow?
> I think so.  We saw a ton of backend warnings that were specific to the s390
> builds in Fedora that appeared to be triggered by different inlining decisions.
>
> It happened enough that one of the ideas we're going to explore is seeing if we
> can tune the x86_64 port to use the same heuristics.  That way we can try to find
> more of these issues in our tester without having to dramatically increase s390x
> resourcing.  This hasn't started, but I expect we'll be looking at it in the fall
> (it's unclear if we can just use flags or will need hackery to the x86 port, but
> we're happy to share whatever we find with the wider community).

Hmm, OK.  Guess if it becomes an issue for openSUSE I'll simply revert those
s390 backend changes.

As a general advice to backend developers I _strongly_ discourage to adjust
--param defaults that affect GIMPLE.

Richard.

> jeff
>
>
>