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Re: [cft] fix 24160
- From: Ulrich Weigand <Ulrich dot Weigand at de dot ibm dot com>
- To: Richard Henderson <rth at redhat dot com>
- Cc: gcc-patches at gcc dot gnu dot org, joern dot rennecke at st dot com
- Date: Mon, 7 Nov 2005 19:15:24 +0100
- Subject: Re: [cft] fix 24160
Richard Henderson <rth@redhat.com> wrote on 07.11.2005 19:06:17:
> On Mon, Nov 07, 2005 at 07:02:16PM +0100, Ulrich Weigand wrote:
> > Is the intent of this patch that now the various special cases in
> > find_reloads and gen_reload that try to handle a PLUS as 'operand'
> > and reload it should never trigger any more?
>
> I don't know how many special cases there are. The PLUS will still
> appear as the rhs of a SET,
But the set should be re-recognized as either a 'load address' type
instruction, or else a 'addM' type instruction, right?
> and as an operand of a PLUS.
But only if the PLUS is itself part of a memory address, right?
> Those two
> probably prevent at least some of the special cases from being
> removed.
The special case I'm concerned about is where a PLUS is allowed
in the slot of any general/register operand (where it is not
simply an address operand or the address inside a memory operand).
Mit freundlichen Gruessen / Best Regards
Ulrich Weigand
--
Dr. Ulrich Weigand
Linux for S/390 Design & Development
IBM Deutschland Entwicklung GmbH, Schoenaicher Str. 220, 71032 Boeblingen
Phone: +49-7031/16-3727 --- Email: Ulrich.Weigand@de.ibm.com