regclass FLOAT_INT_REGS on x86/graph coloring allocator

[Daniel Berlin]

>
> I don't think iterative analysis is bad, if we make sure to use
> the right order so we can limit the number of passes. Using a
> standard dataflow module (df) for the analysis seems like
> a good approach, and this should certainly be good enough until
> the allocator gets more stable and we can do some better testing.
Right.
 >
> Keeping things simple now can only help in finding and fixing bugs
> and limitations of the current approach without spending too much
> time on optimizing an algorithm that might change.

Which is why i tried to make stuff as high level as possible.
Fer instance only thing that really ties this stuff to registers is in
the
absolute start and end routines, and that'll i'll be moving out somewhere
else.


>
>   -Geert
>