df.c and partial writes/REG_EQUAL notes

[Jan Hubicka]

> 
> On Tuesday, September 25, 2001, at 10:59  AM, Jan Hubicka wrote:
> 
> >>
> >>Don't worry about the interactions, as the register allocator branch
> >>A. has it's own version of df.c
> >
> >But once you will attempt to merge allocator in, you probably would not 
> >want
> >to have df1.c and df2.c right?
> Yeah, but you shouldn't have to worry about the new-register allocator 
> when working on the mainline. Currently, df.c on the new-regalloc branch 
> and the mainline are in sync.
> I do merges often enough to keep this true.  So if you break something, 
> we'll just fix the allocator (assuming that's what is doing the wrong 
> thing).
OK,
I just wanted to ensyre that the idea of read/write entries is compatible with
the regalloc design, so it is not side step or that someone won't come with better
idea.

I will clean it up and try to submit today.

Honza