From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 21764 invoked by alias); 25 Sep 2009 17:34:07 -0000 Received: (qmail 21691 invoked by uid 48); 25 Sep 2009 17:33:54 -0000 Date: Fri, 25 Sep 2009 17:34:00 -0000 Message-ID: <20090925173354.21690.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug tree-optimization/41464] vector loads are unnecessarily split into high and low loads In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "ubizjak at gmail dot com" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2009-09/txt/msg02360.txt.bz2 ------- Comment #3 from ubizjak at gmail dot com 2009-09-25 17:33 ------- (In reply to comment #2) > Even if it thinks the arrays aren't aligned, that doesn't explain the > completely unnecessarily zeroing of XMM0 or the choice of the load high/low > instructions over MOVUPS. This is by design, see config/i386/i386.c, ix86_expand_vector_move_misalign and the comment above this function. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41464