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Re: question regarding regrename and failure of 950704-1.c on main branch
- From: Richard Henderson <rth at redhat dot com>
- To: John David Anglin <dave at hiauly1 dot hia dot nrc dot ca>
- Cc: gcc at gcc dot gnu dot org
- Date: Thu, 9 May 2002 14:04:41 -0700
- Subject: Re: question regarding regrename and failure of 950704-1.c on main branch
- References: <200205092049.g49Kntjs024103@hiauly1.hia.nrc.ca>
On Thu, May 09, 2002 at 04:49:55PM -0400, John David Anglin wrote:
> DI 22 overlaps DI 23. There is no early clobber in the contraints for
> the pattern *pa.md:3828.
> The failure started on or around April 30. Is it now necessary to mark
> the output of DI mode arithmetic operations on 32-bit machines early
> clobber to prevent overlaps such as this? Or, is this a regrename bug?
It has _always_ been necessary to mark registers that are
clobbered before all inputs have been consumed as earlyclobber.
How you've gotten away with it until now, I have no idea.