From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 9447B3939C08; Tue, 12 May 2020 13:34:50 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 9447B3939C08 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1589290490; bh=vk6wXtFztYM+IahmQGN25glDUy6b8AhgpTja3DQ0IDU=; h=From:To:Subject:Date:In-Reply-To:References:From; b=PmSRfN6KluDr3bDQKybtGPyOdZaVjwrQ3K+2vUU/mY0/Hg2Js6QDvrD9ruGsFjswZ /SNgrxsTOmdKY58zoJ+mgX4yhPXK5UUSI4Qt2M8/6yOz7X0A9x3jKHG6DFe+GBEebo xedKY+deq5j6qiAXKSnoadq6QWlKC/qDoe2ia7fg= From: "hjl.tools at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/95021] [10/11 Regression] Bogus -Wclobbered warning Date: Tue, 12 May 2020 13:34:50 +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: 10.1.0 X-Bugzilla-Keywords: diagnostic X-Bugzilla-Severity: normal X-Bugzilla-Who: hjl.tools at gmail 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: 10.2 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 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 May 2020 13:34:50 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95021 --- Comment #5 from H.J. Lu --- STV generates: 8d b6 00 00 00 00 lea 0x0(%esi),%esi a1 00 00 00 00 mov 0x0,%eax R_386_32 target_p 83 ec 08 sub $0x8,%esp f3 0f 7e 00 movq (%eax),%xmm0 a1 00 00 00 00 mov 0x0,%eax R_386_32 c 66 0f 6f c8 movdqa %xmm0,%xmm1 66 0f 7e 44 24 10 movd %xmm0,0x10(%esp) 66 0f 73 d1 20 psrlq $0x20,%xmm1 66 0f d6 00 movq %xmm0,(%eax) 66 0f 7e 4c 24 14 movd %xmm1,0x14(%esp) ff 74 24 14 pushl 0x14(%esp) ff 74 24 14 pushl 0x14(%esp) e8 fc ff ff ff call R_386_PC32 e instead of 8d b6 00 00 00 00 lea 0x0(%esi),%esi a1 00 00 00 00 mov 0x0,%eax R_386_32 target_p 8b 0d 00 00 00 00 mov 0x0,%ecx R_386_32 c 83 ec 08 sub $0x8,%esp 8b 50 04 mov 0x4(%eax),%edx 8b 00 mov (%eax),%eax 89 51 04 mov %edx,0x4(%ecx) 89 01 mov %eax,(%ecx) 52 push %edx 50 push %eax e8 fc ff ff ff call R_386_PC32 e It is hard to tell if vector is faster.=