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 E59FC3858D1E; Fri, 23 Feb 2024 06:54:47 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org E59FC3858D1E
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1708671287;
	bh=vJTrumfq8Wn70oLKcdC3lGp3rRkzsGWOK/MPxv627kU=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=WO8R6UCWsLgoKJkcdjtNrOzFX2ZEeJjs+lMD12MNClY1ywkfYRyjxfnapwJhZ4+d1
	 /liIZP9ZYX0AbW9kJR1TRDelQwMoiR8zXIdkMTqwQ2I2dyBY4yGHy4oOTkH6KnJ3jg
	 AoG/i+IPAXb6bywYJ+HsFDmFjxQjnPuQ0b+DAUtU=
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/114057] [14 Regression] 435.gromacs fails verification
 on with -Ofast -march=znver4 and PGO
Date: Fri, 23 Feb 2024 06:54:47 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: needs-bisection, 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: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 14.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: target_milestone
Message-ID: <bug-114057-4-OCLLzfO8Mb@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-114057-4@http.gcc.gnu.org/bugzilla/>
References: <bug-114057-4@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=3D114057

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |14.0

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
If it is a FP rounding issue then my guess would be the extra reduc_scal_*
patterns in the x86 backend to do more BB reduction vectorization.

I guess it doesn't miscompare with -O3 or -O3 -fno-signed-zeros
-fno-trapping-math -ffinite-math-only -ffp-contract=3Dfast?=