From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id CD1F73858D1E; Fri, 8 Sep 2023 01:54:37 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org CD1F73858D1E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1694138077; bh=wGTr6tHNFQT6HGrM3SCE/EqagP3sOuqtxV3CixgBWOQ=; h=From:To:Subject:Date:In-Reply-To:References:From; b=ojSJ7REjxoX+4tPVR9x510Zg8ZLIubWG9h3KcSBfsLfwHZHaFe2RsBz1NQVZ8lwEg t7QnjCJWdfgZqc+CJiMoKus8DqbCcRkNX0+rGm/tJKBdQ2WsvAXSR1nAkBBBrEctEH ug//DAH6zq96WHIooFQA3GRdBpl27i6joZ4gbXfE= From: "d_vampile at 163 dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/111332] Using GCC7.3.0 and GCC10.3.0 to compile the same test case, assembler file instructions are different and performance fallback is obvious. Date: Fri, 08 Sep 2023 01:54:37 +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: 10.3.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: d_vampile at 163 dot com 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 attachments.created 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=3D111332 d_vampile changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |d_vampile at 163 dot com --- Comment #1 from d_vampile --- Created attachment 55851 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D55851&action=3Dedit Assembly Instruction Differences This figure shows the assembly instructions. The left one is gcc7.3.0, and = the right one is gcc10.3.0.=