[PATCH, Atom] Fix performance regression with -mtune=atom

[H.J. Lu]

On Fri, Oct 14, 2011 at 7:15 AM, Vladimir Yakovlev <vbyakovl23@gmail.com> wrote:
> Could anyone checkin that?

Please provide a suitable patch which can be applied.

H.J.
----
> Thanks,
> Vladimir
>
> 2011/10/14 Uros Bizjak <ubizjak@gmail.com>:
>> Hello!
>>
>>> This is a ping. Change affects Atom only and was made because it
>>> really gives better performance on this architecture. This fact
>>> actually leads to the thought that old value is just a simple
>>> misprint.
>>>
>>> > This patch fixes performance regression with -mtune=atom. Changing
>>> > atom cost removes regression in several tests of EEMBC and spec2000.
>>> > Bootstrap amd make check Ok for both with and witout -mtune-atom.
>>> > OK for trunk?
>>> >
>>> > 2011-09-30 ?Yakovlev Vladimir ?vladimir.b.yakovlev@intel.com
>>> >
>>> > ? ? ?* gcc/config/i386/i386.c (atom_cost): Changed cost for loading
>>> > ? ? ? QImode using movzbl.
>>
>> OK.
>>
>> Thanks,
>> Uros.
>>
>



-- 
H.J.