From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id 0BB48385DC06; Wed, 14 Feb 2024 09:25:08 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 0BB48385DC06
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1707902709;
	bh=ch8QnLD7J9rt7AVibKVbABzAV3zSbvK8GcPzmT32kDs=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=so1ihPODADpNKUGlGXsYoFbkknlU6zXrPpqirCGKdIvc57EgshXp5Lzu4lsdV6rDV
	 VUuUAqDywBXdTgEKjiXeoCIspomlMbi+uITDrV5oZOitFkQkxXoWqOeXeMXJRqNiXU
	 8UNk7ApnDSCuWCyY8RNJHPavgq15mcJeM9VSfC8Y=
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/113907] [14 regression] ICU miscompiled since on x86
 since r14-5109-ga291237b628f41
Date: Wed, 14 Feb 2024 09:25:08 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: middle-end
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: rguenth at gcc dot gnu.org
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P1
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 14.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-113907-4-5VgPm5w31S@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-113907-4@http.gcc.gnu.org/bugzilla/>
References: <bug-113907-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113907

--- Comment #26 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #25)
> So, to sum up what has been discussed on IRC, LTO streaming doesn't seem =
to
> stream SSA_NAME_INFO, only the final IPA phases of say IPA-VRP can set
> SSA_NAME_INFO.
> Thus, this bug is most likely solely about -fno-lto behavior of IPA-ICF.
>=20
> Supposedly there we can change the SSA_NAME_INFO upon final decision to
> merge two functions.  I'd say it is in sem_function::merge above if
> (redirect_callers).
> And guard with !flag_wpa (or for flag_wpa assert all SSA_NAME_INFO is NUL=
L).
>=20
> Except that by the time sem_function::merge is called, m_checker with its
> mapping between SSA_NAME_VERSION is unfortunately gone, so we'd need to
> preserve it somewhere.

Or go and throw away all ranges from the final merge target?=