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 135173858C5F; Tue, 31 Jan 2023 07:25:28 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 135173858C5F
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1675149928;
	bh=zQ73v0Qhu7JkRr0jzHj9efoID99NldigoFzMYG9aNaI=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=WTRLCr17J1qBPEgVsEKd0EJOq13vBwo8xq/0yvbd8atQQgDzCCawqEd9v/x8ig6rL
	 L78a5FF79lpG2wohPhYuZJNDzoqzRvpcbdFOUk2/F1shMMWhT8QErN25JgR1cmX7LL
	 is0BgXq1AOc/r1s6DaZNUzOAcM+YarjcIavE+Qp8=
From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/108601] [13 Regression] vector peeling ICEs
 with PGO + LTO + IPA inlining in gcc_r in SPEC2017
Date: Tue, 31 Jan 2023 07:25:27 +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: 13.0
X-Bugzilla-Keywords: ice-on-valid-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: 13.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: cc
Message-ID: <bug-108601-4-S8mHwJroyh@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-108601-4@http.gcc.gnu.org/bugzilla/>
References: <bug-108601-4@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=3D108601

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |liuhongt at gcc dot gnu.or=
g,
                   |                            |rguenth at gcc dot gnu.org

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
To me it's obvious that the path in the backtrace gets a non-constant niter
bump
since we're dealing with epilog peeling.  Either we need to reject this when
requiring a peeled epilogue or we should deal with a non-constant skip_nite=
rs.

This was introduced with r13-2503-gc13223b790bbc5.

Btw, I wonder why we need to use this function instead of re-using the
IV from the vectorized loop (or extracting the "last" value from the
vectorized variant).

It should be possible to construct a testcase with a vectorizable non-linea=
r IV
that requires peeling of the epilog?=