From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 026A33858C2F; Tue, 9 Jan 2024 07:58:51 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 026A33858C2F DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1704787132; bh=lsA3F6Wc5jeGvqyZqJPNHjy/IJvvCNne9cIpugNErlU=; h=From:To:Subject:Date:In-Reply-To:References:From; b=UMCxnSHeLxVzdiguuz+rIMsbjUiQwgdzVaOljIOWegKYrrkv+29uhS31QUXtE6bzX vO3CitZo4iW7piVBG6LwIOGEX60L7Sh1OMKnxcFaDF7lWEwvIcLh/VLD8MSBvNpbJP 27pO/STWvz4s7db1XLtPydONA8FUlheSSjGLHE84= From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/113255] [11/12/13/14 Regression] wrong code with -O2 -mtune=k8 Date: Tue, 09 Jan 2024 07:58:51 +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: 13.2.0 X-Bugzilla-Keywords: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 11.5 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: 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=3D113255 --- Comment #5 from Jakub Jelinek --- (In reply to Richard Biener from comment #4) > I'm unsure the above parallel is valid, isn't parallel executing stmts > in "parallel" (unspecified order)? I don't see anything invalid on it. In addition to the memory copying, it describes the other effects at the end of the pattern (that the counter goe= s to 0 and the di/si pointers are incremented by the original counter times 8). = All the uses of pseudos in the pattern are the values of those pseudos before t= he instruction, then all the sets at the end set the updated pseudos.=