[DF] [performance] generate DF_REF_BASE REFs in REGNO order

[Dimitrios Apostolou]

On Fri, 29 Jul 2011, Kenneth Zadeck wrote:

> i really think that patches of this magnitude having to with the rtl level 
> should be tested on more than one platform.

I'd really appreciate further testing on alternate platforms from whoever 
does it casually, for me it would take too much time to setup my testing 
platform on GCC compile farm, and deadlines are approaching.


Thanks,
Dimitris