From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 2C358385828B; Mon, 4 Dec 2023 11:21:59 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 2C358385828B DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1701688919; bh=e5tTSZHBa+aD/jW1xWfr/2IUPBgAe5xYg5liepWrTkQ=; h=From:To:Subject:Date:In-Reply-To:References:From; b=QXLSPRcjXB27zYRC1LndBOA8Tj4jU8AoKF7QkmPTTCNc1yI+2a2uTG5uuF1XqS5Yw 1VF2MpGpNAySIsI5FF+cV0sbWIM3RGEK9UIMVCN+qY5iT0gxrILDl/0WlMU2xk9LYP ZOiuV6FrvOkvUDVVP1hA48L3U/3IY7ipyEYmhq04= From: "juzhe.zhong at rivai dot ai" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/112431] RISC-V GCC-15 feature: Support register overlap on widen RVV instructions Date: Mon, 04 Dec 2023 11:21:58 +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: missed-optimization X-Bugzilla-Severity: enhancement X-Bugzilla-Who: juzhe.zhong at rivai dot ai 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: 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=3D112431 --- Comment #12 from JuzheZhong --- Except vv/wv variant widen instructions. All other widen EEW overlap have been done. It seems that current register filter can not help us simulate accurate highest-number overlap for vwadd.vv/vwadd.wv instructions.=