public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/103050] [12 Regression] 520.omnetpp_r miscompiled after r12-4787-gb8ef019ab938471f
Date: Tue, 02 Nov 2021 19:53:57 +0000	[thread overview]
Message-ID: <bug-103050-4-oMlGaTXHXU@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-103050-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103050

--- Comment #6 from Martin Liška <marxin at gcc dot gnu.org> ---
I was able to track that to ltrans0, where one needs 2 optimizations to happen:
-fdbg-cnt=ipa_mod_ref_pta:1296-1296:1482-1482

then optimized dump differs (good vs. bad) in:

void recordScalar (struct cFileOutputScalarManager * const this, struct
cComponent * component, const char * name, double value, struct opp_string_map
* attributes)
{
...
   <bb 56> [local count: 84297948]:
   _152 = D.31174._M_dataplus._M_p;
-  if (&D.31174.D.4725._M_local_buf != _152)
-    goto <bb 57>; [53.47%]
-  else
-    goto <bb 58>; [46.53%]
-
-  <bb 57> [local count: 45074110]:
...
   _202 = D.31174._M_dataplus._M_p;
-  if (&D.31174.D.4725._M_local_buf != _202)
-    goto <bb 125>; [0.00%]
-  else
-    goto <bb 126>; [0.00%]
-
-  <bb 125> [count: 0]:
   _203 = D.31174.D.4725._M_allocated_capacity;
   _204 = _203 + 1;
   operator delete (_202, _204);

  parent reply	other threads:[~2021-11-02 19:53 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-02 18:24 [Bug tree-optimization/103050] New: " marxin at gcc dot gnu.org
2021-11-02 18:29 ` [Bug tree-optimization/103050] " hubicka at gcc dot gnu.org
2021-11-02 18:32 ` marxin at gcc dot gnu.org
2021-11-02 18:39 ` marxin at gcc dot gnu.org
2021-11-02 18:41 ` marxin at gcc dot gnu.org
2021-11-02 18:47 ` marxin at gcc dot gnu.org
2021-11-02 19:53 ` marxin at gcc dot gnu.org [this message]
2021-11-02 19:58 ` marxin at gcc dot gnu.org
2021-11-02 20:06 ` marxin at gcc dot gnu.org
2021-11-02 20:08 ` marxin at gcc dot gnu.org
2021-11-02 20:35 ` marxin at gcc dot gnu.org
2021-11-02 20:35 ` marxin at gcc dot gnu.org
2021-11-03  8:11 ` [Bug ipa/103050] " marxin 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-103050-4-oMlGaTXHXU@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).