From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 7EC213858D33; Mon, 23 Jan 2023 17:51:13 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 7EC213858D33 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1674496273; bh=kcXxnr5Yb1btCfHAwh/9/GWS45WzqeLLOexp7A/Hhhg=; h=From:To:Subject:Date:In-Reply-To:References:From; b=v3uYMaHdOxGS2jz9gdCydodqBeDxuT5anFpfz4HLLZaRM94qc86c0uzVNg2drdiUt UIY26MAyX0xdOup+DVy6Olbb93ogozox7qxGFJ5D/1HtZITxkrlsYy9nRwxFl5ssno nTYrNOMPpkpxWtQvLqHrGKn7w1G0IeC3qtGIim5I= From: "pinskia at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/108498] ppc64 big endian generates uninitialized reads with -fstore-merging Date: Mon, 23 Jan 2023 17:51:13 +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: 12.0 X-Bugzilla-Keywords: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: pinskia at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: everconfirmed component cf_reconfirmed_on bug_status 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=3D108498 Andrew Pinski changed: What |Removed |Added ---------------------------------------------------------------------------- Ever confirmed|0 |1 Component|middle-end |tree-optimization Last reconfirmed| |2023-01-23 Status|UNCONFIRMED |NEW --- Comment #13 from Andrew Pinski --- Ok, this seems wrong: New sequence of 1 stores to replace old one of 10 stores # .MEM_102 =3D VDEF <.MEM_101> MEM [(void *)&insn] =3D "\x02\x00\xff\x03\x00\x01\x02\x03"; Exceeded original number of stmts (2). Not profitable to emit new sequence. The size should be 9 rather 8 ...=