new register allocator and HARD_REGNO_CALL_PART_CLOBBERED

[Michael Matz]

Hi,

On Wed, 14 May 2003, Joern Rennecke wrote:

> > The usable_regs are intersected for merged webs.  If the resulting set
> > would be too small (for instance empty) they aren't merged.  So simply
> > limiting the usable_regs for the webs in question should already Just Work
> > (modulo bugs ;-) )
>
> Why would you consider registers that require caller saves as not usable at
> all?  They are perfectly usable, but at a higher cost.

As I said, that is part of a patch here.  I need to clean my backlog
somewhen ...


Ciao,
Michael.