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Re: subreg pass
- From: Richard Henderson <rth at redhat dot com>
- To: Roman Zippel <zippel at linux-m68k dot org>
- Cc: gcc at gcc dot gnu dot org
- Date: Mon, 5 Mar 2007 11:43:20 -0800
- Subject: Re: subreg pass
- References: <Pine.LNX.4.64.0703051406490.14457@scrub.home>
On Mon, Mar 05, 2007 at 02:29:05PM +0100, Roman Zippel wrote:
> challenges, as m68k is still a cc0 target and with instructions like
> addx.l above, so far I avoided splitting these at all.
It would be possible to add an X register to model that one
bit from the flags, since X is generally preserved, and not
clobbered like the regular overflow bit.
r~