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 C7FED385840D; Tue, 17 Oct 2023 13:11:50 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org C7FED385840D
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1697548310;
	bh=YlZqsUcmnUE2vyfK8ivKOCkIDZbexXZGzpoft1wyivs=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=dDaVC6HWqN56ejs+0E+iEgH11cg4QwA0M/dl9l4oZXIqi1bzvD4TNkP0xMUGUw37H
	 ZM4J/Y5M04Gl7+kYxguFcK6QlPMxJ/MtOqYO7rIGXEOMxjILDYw1PJUtdmj/KL4xrS
	 gSCXcYUxGsMWmiGItfHfdEnGWSVSPxc3449JHO7Q=
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/111734] [14 Regression] wrong code with '-O3
 -fno-inline-functions-called-once -fno-inline-small-functions
 -fno-omit-frame-pointer -fno-toplevel-reorder -fno-tree-fre'
Date: Tue, 17 Oct 2023 13:11:50 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: needs-reduction, wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: rguenth at gcc dot gnu.org
X-Bugzilla-Status: NEW
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: cc priority
Message-ID: <bug-111734-4-gz51inLXCw@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-111734-4@http.gcc.gnu.org/bugzilla/>
References: <bug-111734-4@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=3D111734

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |hubicka at gcc dot gnu.org,
                   |                            |jamborm at gcc dot gnu.org,
                   |                            |rguenth at gcc dot gnu.org
           Priority|P3                          |P1

--- Comment #4 from Richard Biener <rguenth at gcc dot gnu.org> ---
-fno-ipa-modref fixes it.

Fails with -O3 -fno-inline -fno-toplevel-reorder -fno-tree-fre

--- a-t.c.146t.pre 2023-10-17 15:07:52.544953598 +0200
+++ a-t.c.146t.pre.bad 2023-10-17 15:07:45.788953643 +0200
@@ -25,7 +25,6 @@
   int _4;

   <bb 2> [local count: 1073741824]:
-  i =3D &e;
   g.constprop (&i);
   i.2_3 =3D i;
   _4 =3D *i.2_3;

I think this is a duplicate of the modref / IPA-CP issue (failing to rememb=
er
the PR number) which IIRC has a patch under review.=