From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 29542 invoked by alias); 21 Feb 2007 16:24:08 -0000 Received: (qmail 29477 invoked by uid 48); 21 Feb 2007 16:23:57 -0000 Date: Wed, 21 Feb 2007 16:24:00 -0000 Message-ID: <20070221162357.29476.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug middle-end/30904] [dataflow] No longer optimizes shifts with large count In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "bonzini at gnu dot org" 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: 2007-02/txt/msg02484.txt.bz2 ------- Comment #6 from bonzini at gnu dot org 2007-02-21 16:23 ------- Created an attachment (id=13083) --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=13083&action=view) patch to fix the bug The logic in trunk's combine with respect to uninitialized variables is correct. We have to look at DF_LR_IN for the entry basic block to find variables that are not used uninitialized. In fact, the name of DF_UR_IN is misleading, as it computes *initialized* registers. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30904