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 961763858D20; Sat, 18 Nov 2023 21:28:03 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 961763858D20
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1700342883;
	bh=KK3MiLtyAzOM881rQiN2GU3MCpRMUCP8XU4qmYJ8gFs=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=rtcycloWXkEoaA7lgomzE0Wa61KEHD6AQovkQw59YF2iJicx+/2CVj0OlKBI+TG86
	 KDL8AjKKw8DtvTlMinVlwdcmRnYZsHx4tIwOvGqpG8qY5Xq25FLHOlSy4HeLPubkpx
	 00b55MgFIosUSewSYBr4Pw/4RbJP1XlbdcAFc8Fc=
From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/112572] [14 regression] LLVM miscompiled since
 r14-5355-g3cd3a09b3f91a1
Date: Sat, 18 Nov 2023 21:28:03 +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: blocker
X-Bugzilla-Who: pinskia 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: everconfirmed cf_reconfirmed_on bug_status
Message-ID: <bug-112572-4-HA3fyHkIYV@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-112572-4@http.gcc.gnu.org/bugzilla/>
References: <bug-112572-4@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=3D112572

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2023-11-18
             Status|UNCONFIRMED                 |NEW

--- Comment #18 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This fixes the issue for me:
```
diff --git a/gcc/compare-elim.cc b/gcc/compare-elim.cc
index c59dc0cf5a5..50424bdfa09 100644
--- a/gcc/compare-elim.cc
+++ b/gcc/compare-elim.cc
@@ -908,6 +908,7 @@ static unsigned int
 execute_compare_elim_after_reload (void)
 {
   df_set_flags (DF_LR_RUN_DCE);
+  df_note_add_problem ();
   df_analyze ();

   gcc_checking_assert (!all_compares.exists ());

```

compare-elim.cc depends on up to date REG_UNUSED and between before vzeroup=
per
and cmpelim the note gets out of date.=