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From: "mikpe at it dot uu dot se" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/39871] [4.3/4.4/4.5 regression] Code size increase on ARM due to inferior CSE
Date: Sun, 14 Jun 2009 14:06:00 -0000 [thread overview]
Message-ID: <20090614140607.1895.qmail@sourceware.org> (raw)
In-Reply-To: <bug-39871-17592@http.gcc.gnu.org/bugzilla/>
------- Comment #3 from mikpe at it dot uu dot se 2009-06-14 14:06 -------
(In reply to comment #1)
> With 4.5 I see
> With 4.5.0 I see:
>
> push {lr}
> sub sp, sp, #12
> ldr r2, [r0]
> ldr r1, [r0, #4]
> mov r0, sp
> str r2, [sp, #4]
> bl func
> add sp, sp, #12
> pop {pc}
I've tested every weekly gcc-4.5 snapshot and they all generate one instruction
more than this code.
How did you configure and invoke gcc-4.5 to get this 9-instruction code?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39871
next prev parent reply other threads:[~2009-06-14 14:06 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-23 16:16 [Bug rtl-optimization/39871] New: [4.3/4.4/4.5 regression] CSE doesn't work alexvod at google dot com
2009-04-24 9:14 ` [Bug rtl-optimization/39871] " rguenth at gcc dot gnu dot org
2009-05-05 15:41 ` [Bug rtl-optimization/39871] [4.3/4.4/4.5 regression] Code size increase on ARM due to inferior CSE mmitchel at gcc dot gnu dot org
2009-05-06 15:07 ` bonzini at gnu dot org
2009-05-20 14:17 ` ramana at gcc dot gnu dot org
2009-06-14 10:24 ` mikpe at it dot uu dot se
2009-06-14 14:06 ` mikpe at it dot uu dot se [this message]
2009-08-04 12:49 ` rguenth at gcc dot gnu dot org
2010-01-02 0:21 ` steven at gcc dot gnu dot org
2010-01-02 10:29 ` bonzini at gnu dot org
2010-01-02 10:31 ` bonzini at gnu dot org
2010-02-08 11:15 ` steven at gcc dot gnu dot org
2010-02-08 11:54 ` rguenth at gcc dot gnu dot org
2010-02-10 12:18 ` jingyu at google dot com
2010-02-10 13:01 ` steven at gcc dot gnu dot org
2010-02-10 13:04 ` steven at gcc dot gnu dot org
2010-02-10 16:28 ` steven at gcc dot gnu dot org
2010-02-10 17:23 ` [Bug rtl-optimization/39871] [4.3/4.4/4.5 regression] Code size increase on ARM due to poor register allocation steven at gcc dot gnu dot org
2010-02-10 17:50 ` steven at gcc dot gnu dot org
2010-02-10 19:25 ` steven at gcc dot gnu dot org
2010-02-10 22:50 ` steven at gcc dot gnu dot org
2010-02-10 23:11 ` bonzini at gnu dot org
2010-02-10 23:45 ` ramana at gcc dot gnu dot org
2010-02-10 23:47 ` steven at gcc dot gnu dot org
2010-02-10 23:53 ` steven at gcc dot gnu dot org
2010-03-18 8:29 ` steven at gcc dot gnu dot org
2010-03-18 8:31 ` steven at gcc dot gnu dot org
2010-04-06 11:38 ` rguenth at gcc dot gnu dot org
2010-06-04 12:44 ` [Bug rtl-optimization/39871] [4.3/4.4/4.5/4.6 " bernds at gcc dot gnu dot org
2010-06-17 21:52 ` bernds at gcc dot gnu dot org
2010-06-17 21:55 ` bernds at gcc dot gnu dot org
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