public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/52048] New: [4.7 Regression] -fcompare-debug failure with -O2 -fcompare-debug -fnon-call-exceptions -fno-tree-dominator-opts
Date: Sun, 29 Jan 2012 22:22:00 -0000	[thread overview]
Message-ID: <bug-52048-4@http.gcc.gnu.org/bugzilla/> (raw)

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52048

             Bug #: 52048
           Summary: [4.7 Regression] -fcompare-debug failure with -O2
                    -fcompare-debug -fnon-call-exceptions
                    -fno-tree-dominator-opts
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
                CC: aoliva@gcc.gnu.org
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 26510
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=26510
autoreduced testcase (from g++.dg/torture/pr41775.C)

Compiler output:
$ gcc -O2 -fcompare-debug -fnon-call-exceptions -fno-tree-dominator-opts
testcase.C
gcc: error: testcase.C: -fcompare-debug failure

$ diff testcase.*gkd
187,188c187,188
<             (set (reg/f:DI 5 di [69])
<                 (plus:DI (reg/f:DI 5 di [orig:67 this ] [67])
---
>             (set (reg/f:DI 5 di [68])
>                 (plus:DI (reg/f:DI 5 di [orig:66 this ] [66])

Tested revisions:
r183676 - fail


             reply	other threads:[~2012-01-29 21:25 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-01-29 22:22 zsojka at seznam dot cz [this message]
2012-01-30  0:15 ` [Bug middle-end/52048] " jakub at gcc dot gnu.org
2012-01-30  0:37 ` jakub at gcc dot gnu.org
2012-01-30  9:23 ` jakub at gcc dot gnu.org
2012-01-30  9:26 ` [Bug debug/52048] " jakub at gcc dot gnu.org
2012-01-30  9:27 ` jakub at gcc dot gnu.org
2012-01-30 14:08 ` jakub at gcc dot gnu.org
2012-01-30 14:18 ` jakub at gcc dot gnu.org

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:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

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

  git send-email \
    --in-reply-to=bug-52048-4@http.gcc.gnu.org/bugzilla/ \
    --to=gcc-bugzilla@gcc.gnu.org \
    --cc=gcc-bugs@gcc.gnu.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* 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).