From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 3AA7E3857C75; Sun, 4 Feb 2024 02:04:26 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 3AA7E3857C75 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1707012266; bh=1ygKs53klVL7gKjI+NV3hHWE3p3Zcj4MhBM6ntmSx2I=; h=From:To:Subject:Date:In-Reply-To:References:From; b=qNAALFuUc7bAD2+V4EsHv2Plkb9vbTwyqPbiczjQGHHUJSUWY6Oku5SBvRZ8ibkIF gPidhxL7G1vTYvAC1/afdmBNz9olatbj+4OzVg57+usZEkmVnZ+P207A503adIu0JY tJEKhMysmBWI++HsuD6Yj+pogn+AFwzlwAzJR0Rg= From: "liuhongt at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/113729] Missing APX NDD optimization Date: Sun, 04 Feb 2024 02:04:20 +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: 14.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: liuhongt at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED 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: cc 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=3D113729 Hongtao Liu changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |liuhongt at gcc dot gnu.org --- Comment #1 from Hongtao Liu --- At gimple level it's (int) b + 200, it's different from (int)(b +200) when there's overflow, i.e. b =3D 200.=20 For extern unsigned char b; unsigned char foo (void) { return 200 + b; } gcc already generate sub al, BYTE PTR b[rip], 56=