public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug rtl-optimization/59743] New: [4.9 Regression] ICE: Segmentation fault
@ 2014-01-09 20:41 trippels at gcc dot gnu.org
  2014-01-09 21:05 ` [Bug middle-end/59743] " trippels at gcc dot gnu.org
                   ` (11 more replies)
  0 siblings, 12 replies; 13+ messages in thread
From: trippels at gcc dot gnu.org @ 2014-01-09 20:41 UTC (permalink / raw)
  To: gcc-bugs

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59743

            Bug ID: 59743
           Summary: [4.9 Regression] ICE: Segmentation fault
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: trippels at gcc dot gnu.org

reduced test case:

typedef union {
  long all;
  struct {
    int low;
    int high;
  } s;
} udwords;
int a, b, c, d;
void __udivmoddi4() {
  udwords r;
  d = __builtin_clz(0);
  r.s.low = 0;
  for (; d; --d) {
    r.s.high = r.s.high << 1 | r.s.low >> a;
    r.s.low = r.s.low << b >> 1;
    int s = -r.all;
    c = s;
    r.all--;
  }
}

 % g++ -O2 -c test.ii
test.ii: In function ‘void __udivmoddi4()’:
test.ii:20:1: internal compiler error: Segmentation fault
 }
 ^
0xb4f8df crash_signal
        ../../gcc/gcc/toplev.c:337
0xb056c9 reg_used_between_p(rtx_def const*, rtx_def const*, rtx_def const*)
        ../../gcc/gcc/rtlanal.c:753
0x103e6eb combine_reaching_defs
        ../../gcc/gcc/ree.c:734
0x103e6eb find_and_remove_re
        ../../gcc/gcc/ree.c:973
0x103e6eb rest_of_handle_ree
        ../../gcc/gcc/ree.c:1035
0x103e6eb execute
        ../../gcc/gcc/ree.c:1074
Please submit a full bug report,
>From gcc-bugs-return-439839-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Thu Jan 09 20:55:42 2014
Return-Path: <gcc-bugs-return-439839-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Delivered-To: listarch-gcc-bugs@gcc.gnu.org
Received: (qmail 6133 invoked by alias); 9 Jan 2014 20:41:06 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Delivered-To: mailing list gcc-bugs@gcc.gnu.org
Received: (qmail 10218 invoked by uid 48); 9 Jan 2014 20:17:06 -0000
From: "rafael.espindola at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug ipa/59469] [4.8/4.9 Regression] LLVM build failure with gcc LTO
Date: Thu, 09 Jan 2014 20:41:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: ipa
X-Bugzilla-Version: 4.9.0
X-Bugzilla-Keywords: lto
X-Bugzilla-Severity: normal
X-Bugzilla-Who: rafael.espindola at gmail dot com
X-Bugzilla-Status: NEW
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 4.9.0
X-Bugzilla-Flags:
X-Bugzilla-Changed-Fields:
Message-ID: <bug-59469-4-icBBqLg1CF@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-59469-4@http.gcc.gnu.org/bugzilla/>
References: <bug-59469-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2014-01/txt/msg00981.txt.bz2
Content-length: 596

http://gcc.gnu.org/bugzilla/show_bug.cgi?idY469

--- Comment #26 from Rafael Avila de Espindola <rafael.espindola at gmail dot com> ---
> Yes, is see the weak symbol both in BasicBlock.o and Function.o.
> However it gets optimized away when I link them with "-flto -O3" into
> libLLVMCore.so (see comment 0).

That optimization seems invalid. There is a explicit template instantiation
definition, so it is valid for other dsos to have an undefined reference.

> Honza says it is an error to have the symbol undefined in
> libLLVMAsmParser.so.
> (The undefined symbol comes from LLParser.cpp)


^ permalink raw reply	[flat|nested] 13+ messages in thread
end of thread, other threads:[~2014-01-10 22:14 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2014-01-09 20:41 [Bug rtl-optimization/59743] New: [4.9 Regression] ICE: Segmentation fault trippels at gcc dot gnu.org
2014-01-09 21:05 ` [Bug middle-end/59743] " trippels at gcc dot gnu.org
2014-01-09 21:15 ` jakub at gcc dot gnu.org
2014-01-09 21:20 ` law at redhat dot com
2014-01-09 21:50 ` law at redhat dot com
2014-01-09 21:57 ` law at redhat dot com
2014-01-09 22:00 ` trippels at gcc dot gnu.org
2014-01-09 23:45 ` jakub at gcc dot gnu.org
2014-01-10  5:21 ` law at redhat dot com
2014-01-10  5:34 ` law at redhat dot com
2014-01-10 21:48 ` law at redhat dot com
2014-01-10 22:13 ` law at gcc dot gnu.org
2014-01-10 22:14 ` law at redhat dot com

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).