From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 27634 invoked by alias); 17 Aug 2011 19:23:38 -0000 Received: (qmail 27625 invoked by uid 22791); 17 Aug 2011 19:23:38 -0000 X-SWARE-Spam-Status: No, hits=-2.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Wed, 17 Aug 2011 19:23:25 +0000 From: "hjl.tools at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/50107] [IRA, i386] allocates regiters in very non-optimal way Date: Wed, 17 Aug 2011 19:32:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: rtl-optimization X-Bugzilla-Keywords: missed-optimization, ra X-Bugzilla-Severity: normal X-Bugzilla-Who: hjl.tools at gmail dot com X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 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: 2011-08/txt/msg01525.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50107 --- Comment #5 from H.J. Lu 2011-08-17 19:22:51 UTC --- (In reply to comment #2) > I guess something wrong with hard register preferencing for multi-register > pseudos in ira-color.c::ira_assign. I believe it works fine for one-register > pseudos. I'll look at this. Thanks for reporting. > Does IRA choose caller-saved register over callee-saved registers? For multi-register pseudos, one of hard register may be callee-saved.