From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id EF0EC3858D3C; Sat, 27 May 2023 20:09:56 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org EF0EC3858D3C DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1685218196; bh=ZMFUFj20/MC4ebOphoW1XnUtq+9Ibz6ElnpSAlwANfc=; h=From:To:Subject:Date:In-Reply-To:References:From; b=KLZ4DH39WfoSddHRlD6TCZrgGVIWYmBOnvukcsqreLmGBSB4xMmlq2nsD+b2CiGqL jJHETzEjq7MtnQQzlZ3v+aZlqELwc2kwhkvU69S1gWFpkOyR9B82+4Hs92hemw3Znl rKnnLWesq9E4A1fC2n48WwXP3yhfBG8+OZ/jx7bQ= From: "pinskia at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/109907] Missed optimization for bit extraction (uses shift instead of single bit-test) Date: Sat, 27 May 2023 20:09:55 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: middle-end X-Bugzilla-Version: 14.0 X-Bugzilla-Keywords: missed-optimization 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: 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=3D109907 --- Comment #29 from Andrew Pinski --- (In reply to Andrew Pinski from comment #25) > Created attachment 55175 [details] > Patch which fixes `signed < 0` >=20 > This patch improves comment #20 . I ran into a code generation regression with this patch on x86_64. I have a patch to fix that but it might take sometime to submit both.=