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From: Willy Tarreau <willy@w.ods.org>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Mikael Pettersson <mikpe@csd.uu.se>,
	marcelo.tosatti@cyclades.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 2.4.31 7/9] gcc4: fix const function warnings
Date: Sun, 12 Jun 2005 14:35:08 +0200	[thread overview]
Message-ID: <20050612123508.GL28759@alpha.home.local> (raw)
In-Reply-To: <42AC273B.60808@yahoo.com.au>

On Sun, Jun 12, 2005 at 10:14:51PM +1000, Nick Piggin wrote:
(...) 
> const functions are those that don't have side effects and depend
> only on their argument list. So such functions can be CSE'ed or
> reordered.
> 
> If it makes sense to use on any inline function, then I think it
> makes sense if they're only using asm. Actually I would have thought
> it would *only* help inline functions using asm, because gcc may
> not know that such asm is 'const'.
> 
> But that's not to say they should be removed just because they
> can't help gcc - it may be instructive to the programmer, or more
> robust when making modifications to the code (eg. uninlining).

Thanks for the clarification, Nick.

Willy


      reply	other threads:[~2005-06-12 12:35 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-06-12 11:21 Mikael Pettersson
2005-06-12 11:50 ` Willy Tarreau
2005-06-12 12:14   ` Nick Piggin
2005-06-12 12:35     ` Willy Tarreau [this message]

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