linux-kernel - Re: kernel + gcc 4.1 = several problems

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Message-ID: <45A0846A.4020603@garzik.org>
Date:	Sun, 07 Jan 2007 00:26:02 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	Linus Torvalds <torvalds@...l.org>
CC:	Denis Vlasenko <vda.linux@...glemail.com>,
	Albert Cahalan <acahalan@...il.com>,
	Segher Boessenkool <segher@...nel.crashing.org>, akpm@...l.org,
	linux-kernel@...r.kernel.org, s0348365@....ed.ac.uk,
	bunk@...sta.de, mikpe@...uu.se
Subject: Re: kernel + gcc 4.1 = several problems

Linus Torvalds wrote:
> (That said, I think __builtin_memcpy() does a reasonable job these days 
> with gcc, and we might drop the crap one day when we can trust the 
> compiler to do ok. It didn't use to, and we continued using our 
> ridiculous macro/__builtin_constant_p misuses just because it works with 
> _all_ relevant gcc versions).


Yep, a ton of work by Roger Sayle, among others, really matured the gcc 
str*/mem* builtins in the 4.x series.  They are definitely worth another 
look.

	Jeff


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