Re: [PATCH] x86: Use __builtin_memset and __builtin_memcpy for memset/memcpy

[Andi Kleen]

On Fri, Oct 02, 2009 at 01:04:25PM -0700, H. Peter Anvin wrote:
> On 10/02/2009 12:19 PM, Andi Kleen wrote:
> > 
> > I tried this some time ago, but it it generates bad code on some 
> > gcc 3 versions.
> > 
> > You really need to test such kind of changes on a wide variety
> > of compilers, not assuming everyone uses the same version as you.
> > 
> 
> The version that went in is for gcc 4 only.

Thanks.

My memory might be faulty, but iirc 4.0/4.1 was also slightly 
problematic. So better take a look at code for that too
if you haven't yet (just code size numbers are not enough)

-Andi

-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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