From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 3C95E3849AD3; Fri, 10 May 2024 08:00:04 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 3C95E3849AD3 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1715328006; bh=mOzhRosqcAyFcgSmnIkraW+eljxHt3oRnTSWvGju6q4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=KqBqdEboZLIgZHeuBTAErVHK9Eua0U0OPCK5Rb/y6AiQi47HpbE2PuymvxOGBOZR2 vjEh+peKiuiGTkxJBWHqxT7A+fMgWIskJvbX0bUfl59G/4DBYv2djah+ACfDznZDfx Zl5u4x0+7+4J4WebdQsmVkCrA+wvK3qpAeI5swfk= From: "haochen.jiang at intel dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/114987] [14/15 Regression] floating point vector regression, x86, between gcc 14 and gcc-13 using -O3 and target clones on skylake platforms Date: Fri, 10 May 2024 08:00:03 +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: normal X-Bugzilla-Who: haochen.jiang at intel 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: 14.2 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=3D114987 --- Comment #5 from Haochen Jiang --- What I have found is that the binary built with GCC13 and GCC14 will regres= s on Cascadelake and Skylake. But when I copied the binary to Icelake, it won't. Seems Icelake might fix = this with micro-tuning. I tried to move "vmovdqa %xmm1,0xd0(%rsp)" before "vmovdqa %xmm0,0xe0(%rsp)" and rebuilt the binary and it will save half the regression.=