public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/28685] Multiple comparisons are not simplified
Date: Sun, 05 Feb 2012 12:42:00 -0000 [thread overview]
Message-ID: <bug-28685-4-tV51IdWd7U@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-28685-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28685
Uros Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |ASSIGNED
Target Milestone|--- |4.8.0
--- Comment #18 from Uros Bizjak <ubizjak at gmail dot com> 2012-02-05 12:40:17 UTC ---
(In reply to comment #17)
> The only one which is not fixed is comment #4
Following patch that enables post-reload compare elimination:
--cut here--
Index: config/i386/i386.c
===================================================================
--- config/i386/i386.c (revision 183904)
+++ config/i386/i386.c (working copy)
@@ -38685,6 +38685,9 @@
#undef TARGET_EXPAND_TO_RTL_HOOK
#define TARGET_EXPAND_TO_RTL_HOOK ix86_maybe_switch_abi
+#undef TARGET_FLAGS_REGNUM
+#define TARGET_FLAGS_REGNUM FLAGS_REG
+
#undef TARGET_LEGITIMATE_ADDRESS_P
#define TARGET_LEGITIMATE_ADDRESS_P ix86_legitimate_address_p
--cut here--
generates (-O2):
test:
xorl %edx, %edx
cmpl %esi, %edi
movl $1, %eax
sete %dl
cmovge %edx, %eax
ret
Please note missing comparison.
This shows that the pass is effective for x86_64, but will be enabled for 4.8.
next prev parent reply other threads:[~2012-02-05 12:42 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-28685-4@http.gcc.gnu.org/bugzilla/>
2012-01-12 1:07 ` pinskia at gcc dot gnu.org
2012-02-05 12:42 ` ubizjak at gmail dot com [this message]
2012-02-06 21:37 ` ubizjak at gmail dot com
2012-04-22 12:42 ` ubizjak at gmail dot com
2012-04-22 12:46 ` ubizjak at gmail dot com
2012-04-22 12:48 ` ubizjak at gmail dot com
2014-10-31 4:02 ` pinskia at gcc dot gnu.org
2006-08-10 18:15 [Bug middle-end/28685] New: " uros at kss-loka dot si
2006-08-10 18:18 ` [Bug middle-end/28685] " pinskia at gcc dot gnu dot org
2008-04-30 15:13 ` rguenth at gcc dot gnu dot org
2008-09-06 16:34 ` ubizjak at gmail dot com
2008-10-12 20:46 ` rguenth at gcc dot gnu dot org
2009-04-24 9:24 ` rguenth at gcc dot gnu dot org
2009-04-24 9:25 ` rguenth at gcc dot gnu dot org
2009-06-24 7:49 ` steven at gcc dot gnu dot org
2009-06-24 9:15 ` rguenth at gcc dot gnu dot org
2009-09-17 10:25 ` ubizjak at gmail dot com
2010-05-07 2:32 ` sandra at codesourcery dot com
2010-05-08 3:44 ` sandra at codesourcery dot com
2010-05-08 15:54 ` sandra at gcc dot gnu dot org
2010-05-24 13:22 ` sandra at codesourcery dot com
2010-05-25 8:12 ` rguenther at suse dot de
2010-06-01 2:24 ` sandra at codesourcery dot com
2010-06-08 18:16 ` sandra at gcc dot gnu dot 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-28685-4-tV51IdWd7U@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).