[Bug rtl-optimization/37948] [4.4 Regression] IRA generates slower code for -mtune=core2

[pinskia at gmail dot com]

------- Comment #3 from pinskia at gmail dot com  2008-10-29 07:25 -------
Subject: Re:  [4.4 Regression] IRA generates slower code for -mtune=core2



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On Oct 29, 2008, at 12:17 AM, "bonzini at gnu dot org"
<gcc-bugzilla@gcc.gnu.org 
 > wrote:

>
>
> ------- Comment #2 from bonzini at gnu dot org  2008-10-29 07:17  
> -------
> Subject: Re:  [4.4 Regression] IRA generates slower
> code for -mtune=core2
>
> hjl dot tools at gmail dot com wrote:
>> ------- Comment #1 from hjl dot tools at gmail dot com  2008-10-29  
>> 05:44 -------
>> It looks like the cost of loading/storing FP values aren't  
>> appropriate for
>> Core 2. With this patch:
>
> Good.  Is regmove still helping (which would be the wrong thing to do,
> but gives a data point)?

I noticed that ira ignores ! part of constraint do you know if the  
register class would change if ! was not ignored?

Thanks,
Andrew Pinsky

>
>
> Paolo
>
>
> -- 
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37948
>


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37948