From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 999463858407; Tue, 10 Jan 2023 12:45:08 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 999463858407 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1673354708; bh=F+/om+U9ytCtuPMfrabNZDKM1DsVESGgsfEBNh79nh0=; h=From:To:Subject:Date:In-Reply-To:References:From; b=mQ/e4+4tF0Y7gas9nO8ipQIU9qGpT4v7MTG3muLyoC9EVBxt2yy9TF7P33D1ljec7 RJF6yRu1vtRplbBhrN5ElrlT965LVNnU+ZvUuRMwYaTi2rMHC9UoQJDlQlaVAMG6wq 34rzxukUHilB8wRV/Gcy5911nujtV994ghVWf5Bk= From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/106293] [13 Regression] 456.hmmer at -Ofast -march=native regressed by 19% on zen2 and zen3 in July 2022 Date: Tue, 10 Jan 2023 12:45:08 +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: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: rguenth at gcc dot gnu.org X-Bugzilla-Target-Milestone: 13.0 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_status assigned_to Message-ID: In-Reply-To: References: 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: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106293 Richard Biener changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED Assignee|unassigned at gcc dot gnu.org |rguenth at gcc dot = gnu.org --- Comment #7 from Richard Biener --- Interesting. It seems that early DSE is hindered by the extra PHI, possibly not reaching the CLOBBER. @@ -24,6 +24,8 @@ goto ; [INV] : + # .MEM_10 =3D VDEF <.MEM_9> + g =3D &b; goto ; [INV] : @@ -39,7 +41,7 @@ goto ; [INV] : - # .MEM_5 =3D PHI <.MEM_9(3), .MEM_14(5)> + # .MEM_5 =3D PHI <.MEM_10(3), .MEM_14(5)> # VUSE <.MEM_5> d.3_4 =3D d; if (d.3_4 !=3D 0) @@ -48,7 +50,8 @@ goto ; [INV] : - # .MEM_12 =3D VDEF <.MEM_5> + # .MEM_17 =3D PHI <.MEM_5(6)> + # .MEM_12 =3D VDEF <.MEM_17> g =3D{v} {CLOBBER(eol)};=