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Re: Register Allocation

From: Peter Bergner <bergner at vnet dot ibm dot com>
To: Steven Bosscher <stevenb at suse dot de>
Cc: gcc at gcc dot gnu dot org, Andrew MacLeod <amacleod at redhat dot com>, Daniel Berlin <dberlin at dberlin dot org>
Date: Tue, 22 Nov 2005 16:57:56 -0600
Subject: Re: Register Allocation
References: <1132246411.10098.153.camel@localhost.localdomain> <1132687596.7748.32.camel@otta.rchland.ibm.com> <200511222256.13823.>

On Tue, 2005-11-22 at 22:56 +0100, an unknown sender wrote:
> On Tuesday 22 November 2005 20:26, Peter Bergner wrote:
> > Insn Annotations [page(s) 17-18]:
> >     * I like the idea of easy access to the register usage info
> >       provided by the insn annotations.  RTL isn't really setup
> >       for making that easy.
> 
> But it is if you use df.c.   Really, it is.  It is right there:
> reg-use and reg-def chains per insn, UD and DU chains, etc.

I meant to say that I like the idea of easy access to an insn's
register usage info,  Whether that comes from insn annotations
or from df.c, I personally don't care.  I just don't want to
hunt around the RTL insn for them, since that's time consuming.

Peter

References:
- Register Allocation
  - From: Andrew MacLeod
- Re: Register Allocation
  - From: Peter Bergner

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