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From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/32698] [4.3 regression] inefficient pointer expression
Date: Mon, 09 Jul 2007 13:41:00 -0000	[thread overview]
Message-ID: <20070709134136.5653.qmail@sourceware.org> (raw)
In-Reply-To: <bug-32698-14001@http.gcc.gnu.org/bugzilla/>



------- Comment #2 from rguenth at gcc dot gnu dot org  2007-07-09 13:41 -------
Created an attachment (id=13875)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=13875&action=view)
patch

With the proposed patch mainline generates again

foo:
        pushl   %ebp
        movl    %esp, %ebp
        movl    8(%ebp), %ecx
        movl    12(%ebp), %edx
        popl    %ebp
        movl    8(%ecx,%edx,4), %eax
        addl    4(%ecx,%edx,4), %eax
        addl    12(%ecx,%edx,4), %eax
        ret

and

  return (*(p + (i + 2) * 4) + *(p + (i + 1) * 4)) + *(p + (i + 3) * 4);


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32698


  parent reply	other threads:[~2007-07-09 13:41 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-07-09 13:25 [Bug tree-optimization/32698] New: " zippel at gcc dot gnu dot org
2007-07-09 13:40 ` [Bug tree-optimization/32698] " rguenth at gcc dot gnu dot org
2007-07-09 13:41 ` rguenth at gcc dot gnu dot org [this message]
2007-07-09 13:42 ` rguenth at gcc dot gnu dot org
2007-07-09 14:40 ` zippel at gcc dot gnu dot org
2007-07-09 15:01 ` rguenth at gcc dot gnu dot org
2007-07-09 15:28 ` zippel at gcc dot gnu dot org
2007-07-09 15:37 ` rguenther at suse dot de
2007-07-09 17:42 ` zippel at gcc dot gnu dot org
2007-07-09 19:42 ` rguenth at gcc dot gnu dot org
2007-07-18  6:00 ` pinskia at gcc dot gnu dot org
2007-07-18 12:56 ` zippel at gcc dot gnu dot org
2007-07-19 16:50 ` rguenth at gcc dot gnu dot org
2007-07-19 18:27 ` zippel at gcc dot gnu dot org
2007-07-20 11:48 ` rguenth at gcc dot gnu dot org
2007-07-20 11:58 ` zippel at gcc dot gnu dot org
2007-07-20 16:06 ` rguenth at gcc dot gnu dot org
2007-07-20 16:21 ` zippel at gcc dot gnu dot org
2007-07-20 16:35 ` rguenth at gcc dot gnu dot org
2007-07-20 17:06 ` zippel at gcc dot gnu dot org
2007-07-20 17:22 ` rguenth at gcc dot gnu dot org
2007-08-10  0:44 ` mmitchel at gcc dot gnu dot org
2007-11-19  9:01 ` steven at gcc dot gnu dot org
2008-01-13 15:18 ` rguenth at gcc dot gnu dot org

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