From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 28493 invoked by alias); 11 Sep 2002 13:46:06 -0000 Mailing-List: contact gcc-prs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Archive: List-Post: List-Help: Sender: gcc-prs-owner@gcc.gnu.org Received: (qmail 28472 invoked by uid 71); 11 Sep 2002 13:46:05 -0000 Resent-Date: 11 Sep 2002 13:46:05 -0000 Resent-Message-ID: <20020911134605.28471.qmail@sources.redhat.com> Resent-From: gcc-gnats@gcc.gnu.org (GNATS Filer) Resent-Cc: gcc-prs@gcc.gnu.org, gcc-bugs@gcc.gnu.org, mercury@cs.mu.oz.au Resent-Reply-To: gcc-gnats@gcc.gnu.org, fjh@cs.mu.oz.au Received: (qmail 27427 invoked by uid 61); 11 Sep 2002 13:41:17 -0000 Message-Id: <20020911134117.27426.qmail@sources.redhat.com> Date: Wed, 11 Sep 2002 06:46:00 -0000 From: fjh@cs.mu.oz.au Reply-To: fjh@cs.mu.oz.au To: gcc-gnats@gcc.gnu.org Cc: mercury@cs.mu.oz.au X-Send-Pr-Version: gnatsweb-2.9.3 (1.1.1.1.2.31) X-GNATS-Notify: mercury@cs.mu.oz.au Subject: optimization/7887: Undefined labels with -O2 -fpic breaks Mercury bootstrap X-SW-Source: 2002-09/txt/msg00187.txt.bz2 List-Id: >Number: 7887 >Category: optimization >Synopsis: Undefined labels with -O2 -fpic breaks Mercury bootstrap >Confidential: no >Severity: critical >Priority: medium >Responsible: unassigned >State: open >Class: rejects-legal >Submitter-Id: net >Arrival-Date: Wed Sep 11 06:46:03 PDT 2002 >Closed-Date: >Last-Modified: >Originator: 20020911 >Release: GNU C version 3.3 20020903 (experimental) >Organization: >Environment: >Description: The symptom is undefined labels when compiling with -O2 -fpic. fjh$ $ gcc -O2 -fpic bug.c /var/tmp/ccCVWnRc.o: In function `.L71': /var/tmp/ccCVWnRc.o(.text+0x203): undefined reference to `.L99' /var/tmp/ccCVWnRc.o(.text+0x239): undefined reference to `.L115' collect2: ld returned 1 exit status Background: I checked out the current (2002-09-11) gcc sources, and tried to use them to bootstrap the Mercury front-end. This failed due to an error in the gcc back-end. Fortunately I was able to reproduce the error using a test case written in C rather than Mercury. This bug is a regression from gcc 2.95.3, which compiles the attached file correctly. (It's probably also a regression from gcc 3.2, but I haven't checked that.) I also tried this file with a version of gcc that I checked out last week (2002-09-03). On that version, gcc got an ICE when compiling it with -O2, even without -fpic. The one seems to be fixed this week, but there's still this problem with -O2 -fpic. >How-To-Repeat: Build gcc, and then compile the attached file with -fpic -02. >Fix: >Release-Note: >Audit-Trail: >Unformatted: ----gnatsweb-attachment---- Content-Type: application/octet-stream; name="bug.c" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="bug.c" dHlwZWRlZiB1bnNpZ25lZCBpbnQgTVJfdWludHB0cl90Owp0eXBlZGVmIGludCBNUl9pbnRwdHJf dDsKCnR5cGVkZWYgdW5zaWduZWQgbG9uZyBsb25nIE1SX3VpbnRfbGVhc3Q2NF90Owp0eXBlZGVm IGxvbmcgbG9uZyBNUl9pbnRfbGVhc3Q2NF90OwoKdHlwZWRlZiB1bnNpZ25lZCBpbnQgTVJfdWlu dF9sZWFzdDMyX3Q7CnR5cGVkZWYgaW50IE1SX2ludF9sZWFzdDMyX3Q7CnR5cGVkZWYgdW5zaWdu ZWQgc2hvcnQgTVJfdWludF9sZWFzdDE2X3Q7CnR5cGVkZWYgc2hvcnQgTVJfaW50X2xlYXN0MTZf dDsKdHlwZWRlZiB1bnNpZ25lZCBjaGFyIE1SX3VpbnRfbGVhc3Q4X3Q7CnR5cGVkZWYgc2lnbmVk IGNoYXIgTVJfaW50X2xlYXN0OF90OwoKdHlwZWRlZiBNUl91aW50cHRyX3QgTVJfV29yZDsKdHlw ZWRlZiBNUl9pbnRwdHJfdCBNUl9JbnRlZ2VyOwp0eXBlZGVmIE1SX3VpbnRwdHJfdCBNUl9VbnNp 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