public inbox for
help / color / mirror / Atom feed
Subject: Re: optimization/10877: [3.3/3.4 regression] miscompilation with -O3 -fPIC on x86
Date: Tue, 20 May 2003 01:16:00 -0000	[thread overview]
Message-ID: <> (raw)

Old Synopsis: GCC 3.3 miscompiles code with -O3 -fPIC on x86
New Synopsis: [3.3/3.4 regression] miscompilation with -O3 -fPIC on x86

State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Tue May 20 01:16:37 2003
    Confirmed. This is a smaller snippet (it has nothing to
    do with namespaces):
    int* i;
    int& get_x() {
      return *i;
    int main() {
      int j;
      i = &j;
    It crashed in get_x:
    g/x> /home/bangerth/bin/gcc-3.3-pre/bin/c++ -O3 -fPIC
    g/x> ./a.out
    Segmentation fault
    Note that we really need both -fPIC and -O3.
    This crashes with both 3.3 and present mainline. It
    doesn't with 2.95 and 3.2.3, so it's definitely a
    regression worth fixing!

             reply	other threads:[~2003-05-20  1:16 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-05-20  1:16 bangerth [this message]
2003-05-20  2:06 Andrew Pinski
2003-05-20 13:56 Wolfgang Bangerth
2003-05-20 16:16 Wolfgang Bangerth
2003-05-20 17:06 Wolfgang Bangerth
2003-05-20 17:06 Christian Ehrhardt
2003-05-20 17:16 Andrew Pinski
2003-05-20 19:16 Wolfgang Bangerth
2003-05-20 19:27 Andrew Pinski
2003-05-20 19:36 Andrew Pinski
2003-05-20 22:46 Janis Johnson
2003-05-21  8:46 Christian Ehrhardt
2003-05-21 11:28 Christian Ehrhardt
2003-05-21 12:46 Christian Ehrhardt

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \ \ \ \ \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
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).