From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thomas Monjalon Subject: Re: [PATCH] eal/x86: Fix build with clang for old AVX Date: Thu, 04 Feb 2016 22:32:23 +0100 Message-ID: <2821262.qCsjkLddf6@xps13> References: <1454551954-45356-1-git-send-email-zhihong.wang@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7Bit Cc: dev@dpdk.org To: Zhihong Wang Return-path: Received: from mail-wm0-f51.google.com (mail-wm0-f51.google.com [74.125.82.51]) by dpdk.org (Postfix) with ESMTP id A33469A81 for ; Thu, 4 Feb 2016 22:33:38 +0100 (CET) Received: by mail-wm0-f51.google.com with SMTP id p63so1424965wmp.1 for ; Thu, 04 Feb 2016 13:33:38 -0800 (PST) In-Reply-To: <1454551954-45356-1-git-send-email-zhihong.wang@intel.com> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" 2016-02-03 21:12, Zhihong Wang: > When configuring RTE_MACHINE to "default", rte_memcpy implementation > is the default one (old AVX). > In this code, clang raises a warning thanks to -Wsometimes-uninitialized: > > rte_memcpy.h:838:6: error: > variable 'srcofs' is used uninitialized whenever 'if' condition is false > if (dstofss > 0) { > ^~~~~~~~~~~ > rte_memcpy.h:849:6: note: uninitialized use occurs here > if (srcofs == 0) { > ^~~~~~ > > It is fixed by moving srcofs initialization out of the condition. > Also dstofss calculation is corrected. > > Fixes: 1ae817f9f887 ("eal/x86: tune memcpy for platforms without AVX512") > > Signed-off-by: Zhihong Wang > Reported-by: De Lara Guarch, Pablo Applied, thanks