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/43654]  New: Very long compile time with -O2 -floop-block
Date: Mon, 05 Apr 2010 20:44:00 -0000	[thread overview]
Message-ID: <bug-43654-14164@http.gcc.gnu.org/bugzilla/> (raw)

Tested revisions:
r157965 - fail (~140s)
r153685 - crash
4.4 r157895 - OK (~0.2s)

Executed on a 1.6GHz CPU, CLooG-PPL 0.15.8, PPL 0.10.2:
$ /mnt/svn/gcc-trunk/binary-157965-lto/bin/gcc -O2 -floop-block testcase.c
-ftime-report -c

Execution times (seconds)
 Graphite loop transforms: 135.75 (100%) usr   0.88 (100%) sys 137.88 (100%)
wall      26 kB ( 1%) ggc
 Graphite data dep analysis:   0.02 ( 0%) usr   0.00 ( 0%) sys   0.01 ( 0%)
wall       0 kB ( 0%) ggc
 Graphite code generation:   0.05 ( 0%) usr   0.00 ( 0%) sys   0.06 ( 0%) wall 
    59 kB ( 3%) ggc
 tree iv optimization  :   0.01 ( 0%) usr   0.00 ( 0%) sys   0.01 ( 0%) wall   
 151 kB ( 8%) ggc
 tree STMT verifier    :   0.00 ( 0%) usr   0.00 ( 0%) sys   0.01 ( 0%) wall   
   0 kB ( 0%) ggc
 loop invariant motion :   0.01 ( 0%) usr   0.00 ( 0%) sys   0.01 ( 0%) wall   
   5 kB ( 0%) ggc
 branch prediction     :   0.01 ( 0%) usr   0.00 ( 0%) sys   0.00 ( 0%) wall   
   2 kB ( 0%) ggc
 reload                :   0.01 ( 0%) usr   0.00 ( 0%) sys   0.01 ( 0%) wall   
   4 kB ( 0%) ggc
 TOTAL                 : 135.87             0.88           137.99              
1961 kB
Extra diagnostic checks enabled; compiler may run slowly.
Configure with --enable-checking=release to disable checks.

Disabling checking doesn't help.


-- 
           Summary: Very long compile time with -O2 -floop-block
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: zsojka at seznam dot cz
  GCC host triplet: x86_64-pc-linux-gnu
GCC target triplet: x86_64-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43654


             reply	other threads:[~2010-04-05 20:44 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-04-05 20:44 zsojka at seznam dot cz [this message]
2010-04-05 20:50 ` [Bug middle-end/43654] " zsojka at seznam dot cz
2010-04-18 22:14 ` zsojka at seznam dot cz

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-43654-14164@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).