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Re: regrename_optimize problem
- To: Roman Zippel <zippel at linux-m68k dot org>
- Subject: Re: regrename_optimize problem
- From: Richard Henderson <rth at redhat dot com>
- Date: Sat, 21 Jul 2001 18:12:43 -0700
- Cc: gcc-bugs at gcc dot gnu dot org
- References: <Pine.LNX.4.33.0107200217320.16273-100000@serv>
On Fri, Jul 20, 2001 at 02:32:58AM +0200, Roman Zippel wrote:
> The problems is that regrename_optimize tries to rename a data register
> into a floating point register.
Not having looked into this carefully yet, I suspect a problem
with the constraints in the md file. Certainly nothing like your
patch should ever be required.
The uses HARD_REGNO_RENAME_OK on ia64 is primarily for games
we play with the register stack behind the back of the register
allocator. I'm not sure what's going on with c4x.
r~