From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 29449 invoked by alias); 16 Jul 2009 15:20:28 -0000 Received: (qmail 29423 invoked by uid 22791); 16 Jul 2009 15:20:26 -0000 X-SWARE-Spam-Status: No, hits=-51.3 required=5.0 tests=AWL,BAYES_00,SPF_PASS X-Spam-Check-By: sourceware.org Received: from rock.gnat.com (HELO rock.gnat.com) (205.232.38.15) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Thu, 16 Jul 2009 15:20:18 +0000 Received: from localhost (localhost.localdomain [127.0.0.1]) by filtered-rock.gnat.com (Postfix) with ESMTP id AF9392BAB00; Thu, 16 Jul 2009 11:20:16 -0400 (EDT) Received: from rock.gnat.com ([127.0.0.1]) by localhost (rock.gnat.com [127.0.0.1]) (amavisd-new, port 10024) with LMTP id s71cbAE64s2b; Thu, 16 Jul 2009 11:20:16 -0400 (EDT) Received: from [192.168.1.104] (misc-148-64-202-242.pool.starband.net [148.64.202.242]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by rock.gnat.com (Postfix) with ESMTPSA id 25DD12BAB1B; Thu, 16 Jul 2009 11:20:12 -0400 (EDT) Message-ID: <4A5F450A.3070003@gnat.com> Date: Thu, 16 Jul 2009 15:20:00 -0000 From: Douglas B Rupp User-Agent: Thunderbird 2.0.0.22 (Windows/20090605) MIME-Version: 1.0 To: Richard Henderson CC: gcc@gcc.gnu.org Subject: Re: Multiple calls to case NOTE_INSN_EPILOGUE_BEG for same function? References: <4A5A39BE.6010901@gnat.com> <4A5E1882.6060209@redhat.com> <4A5E73F1.9000304@gnat.com> <4A5F429E.4010906@redhat.com> In-Reply-To: <4A5F429E.4010906@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-IsSubscribed: yes Mailing-List: contact gcc-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-owner@gcc.gnu.org X-SW-Source: 2009-07/txt/msg00313.txt.bz2 Richard Henderson wrote: > On 07/15/2009 05:27 PM, Douglas B Rupp wrote: >> LEB0 and LEB1 are duplicated in the attached ivms assembly file from >> libgcc2. Note the first occurrence of each is at the prologue end, which >> makes no sense to me. >> >> FYI: I'm emitting the LPE labels at NOTE_INSN_FUNCTION_BEG and the LEB >> labels at NOTE_INSN_EPILOGUE_BEG. I can send you the full patch if you >> like. >> >> I deleted the .debug* sections to reduce the size of the file. > > Hmm. It looks like sched-ebb is moving the epilogue note farther away > from the epilogue than I expected. Since only ia64 uses this scheduler, > I hadn't noticed. I wonder what's the easiest way to handle this. > > As for the fact that they're both labeled .LEB0... that's surely an ia64 > backend bug. Certainly there's no such problem with the generic dwarf2 > output; if there were such a problem it would be preventing x86 bootstrap. Your right, the labeling is purely contrived to illustrate the problem. I can fix that bug by implementing the multiple epilogue ABI for VMS.