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Re: arm_hard_regno_mode_ok update
- From: Richard Earnshaw <rearnsha at arm dot com>
- To: Phil Blundell <pb at nexus dot co dot uk>
- Cc: Nick Clifton <nickc at cambridge dot redhat dot com>, Richard dot Earnshaw at arm dot com, gcc-patches at gcc dot gnu dot org
- Date: Fri, 25 Jan 2002 12:07:15 +0000
- Subject: Re: arm_hard_regno_mode_ok update
- Organization: ARM Ltd.
- Reply-to: Richard dot Earnshaw at arm dot com
> On Fri, 2002-01-25 at 11:42, Nick Clifton wrote:
> > Because I am trying to stop IP (r12) being assigned to hold a DImode
> > value, since the upper half will be placed in the stack pointer
> > (r13), which is not good.
>
> How come the fact that R13 is in FIXED_REGISTERS doesn't stop this from
> happening already? Does that mean that if I use -ffixed-r7, say, the
> compiler might still choose to put a DImode value in R6+R7?
>
> p.
Indeed. That was the essence of my question here...
http://gcc.gnu.org/ml/gcc-patches/2002-01/msg01504.html
R.