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From: Daniel Mierswa <impulze@impulze.org>
To: gcc-help@gcc.gnu.org
Subject: Re: Inline ASM and stack/base pointer
Date: Thu, 09 Jun 2011 23:12:00 -0000	[thread overview]
Message-ID: <4DF148B9.6070709@impulze.org> (raw)
In-Reply-To: <BANLkTikg+N_E=OYU-wU2Od=2rsh=K=Ktsg@mail.gmail.com>

On 09.06.2011 20:02, Paul Römer wrote:
> Hi,
> 
> What happens if you compile only with -fomit-frame-pointer? I'm not sure
> if it will be activated without adding an -Ox option. Can you add an
> example code?
impulze@istari ~ $ gcc-4.4 -S -fomit-frame-pointer test.c && grep -m1
lea test.s
	lea 12(%esp), %edi
impulze@istari ~ $ gcc-4.5 -S -fomit-frame-pointer test.c && grep -m1
lea test.s
	lea 12(%esp), %edi
impulze@istari ~ $ gcc-4.6 -S -fomit-frame-pointer test.c && grep -m1
lea test.s
	lea 12(%esp), %edi
impulze@istari ~ $ cat test.c
void f()
{
    int i;
    __asm__ __volatile__("lea %0, %%edi\n"::"m"(i):"%esp");
}

> What gcc you use?
4.4.5, 4.5.2, 4.6.0

-- 
Mierswa, Daniel

If you still don't like it, that's ok: that's why I'm boss. I simply
know better than you do.
               --- Linus Torvalds, comp.os.linux.advocacy, 1996/07/22

  parent reply	other threads:[~2011-06-09 20:26 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-06-09 15:22 Daniel Mierswa
2011-06-09 18:09 ` Ian Lance Taylor
2011-06-09 18:47   ` kevin diggs
2011-06-09 19:53     ` Ian Lance Taylor
2011-06-09 20:26   ` Daniel Mierswa
2011-06-09 20:41   ` Daniel Mierswa
     [not found]     ` <BANLkTikg+N_E=OYU-wU2Od=2rsh=K=Ktsg@mail.gmail.com>
2011-06-09 23:12       ` Daniel Mierswa [this message]
2011-06-10  1:21         ` Ian Lance Taylor

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