Re: Debugging info on # spills?

["Vladimir N. Makarov" <vmakarov at redhat dot com>]

Mostafa Hagog wrote:

> Michael Matz <matz@suse.de> wrote on 08/04/2004 16:37:13:
>
>  
>
> > Hi,
> >
> > On Thu, 8 Apr 2004, Mostafa Hagog wrote:
> >
> >    
> >
> > > How about a different but related question.
> > > Is there a way to get the number of spilled registers in a given
> > > compilation?
> > >      
> > Yes, it's simply all pseudos which didn't get a hardreg, i.e. for which
> > reg_renumber[p] is < 0 and which are equivalent to nothing.
> >    
>
> But even this is not dumped anywhere, right?
>
>  
If you use the original global register allocator, this information will 
be in global rtl dump.  It is named disposition and looks like

Disposition:

75 in 0 76 in 2 ...

It means that pseudo-register 75 got hard register 0 etc.  This 
information is dumped after the reload (when some pseudo-register loose 
their hard-registers gotten in local/global or changed their hard 
registers by retry_global_alloc).  So this information is final 
(although hard registers can be changed by register-renaming pass).  If 
you want this information right after global register allocator just 
call dump_global_regs before build_insn_chain in global.c

Vlad


> >