From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 0DF0F3858C53; Fri, 2 Sep 2022 17:05:32 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 0DF0F3858C53 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1662138332; bh=++3EsYTaMqtBnpbAqUyXSJfmmTfwra1P9lyvPTZYCw4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=agFSBtR72mDSfI4h6LXkfePjYR4W5SMGwdPoI9CHZGh7pFWfXNpeevOOW6BhjC/oI X9Pw8aF6Mp19r64mNhFYJHTMgBk+02btQ4Wj9KrW09BAcf1RPcRYnz7MiP5rArG7Ii O45WNKJlExmRG2nqoKwerAF3gc3HVhx+pk17WtrY= From: "roger at nextmovesoftware dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug debug/106746] [13 Regression] '-fcompare-debug' failure (length) with -O2 -fsched2-use-superblocks since r13-2041-g6624ad73064de241 Date: Fri, 02 Sep 2022 17:05:31 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: debug X-Bugzilla-Version: 13.0 X-Bugzilla-Keywords: compare-debug-failure X-Bugzilla-Severity: normal X-Bugzilla-Who: roger at nextmovesoftware dot com 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: 13.0 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=3D106746 --- Comment #9 from Roger Sayle --- I'm curious why the zero_extend behaves so differently to a sign_extend, perhaps a missing simplification or pattern. Presumably the CONCAT in the debug_insn is there whether or not a sign_extend or zero_extend is used?=