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Re: regclass FLOAT_INT_REGS on x86/graph coloring allocator
- To: Michael Matz <matzmich at cs dot tu-berlin dot de>
- Subject: Re: regclass FLOAT_INT_REGS on x86/graph coloring allocator
- From: Daniel Berlin <dberlin at redhat dot com>
- Date: Sat, 3 Feb 2001 19:54:04 -0500 (EST)
- cc: Daniel Berlin <dberlin at redhat dot com>, <gcc at gcc dot gnu dot org>
On Sun, 4 Feb 2001, Michael Matz wrote:
> Hi,
>
> On Sat, 3 Feb 2001, Daniel Berlin wrote:
> >
> > Actually, the only thing that ties mine to registers is that we use
> > FIRST_PSEUDO_REGISTER in a few places, max_reg as a size limit in some
> > places, etc. I'll move it to do it allocation based on defs (as
> > opposed to registers) tonight.
>
> You can't use defs as base for the conflicting nodes, you really need
> webs. Or you use SSA form, where of course defs and webs are the same.
We can't, without avoiding some renames, use SSA that late.
I'll use webs.
>
>
> Ciao,
> Michael.
>