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Re: allow recursive peepholing
- To: Jan Hubicka <jh at suse dot cz>
- Subject: Re: allow recursive peepholing
- From: Richard Henderson <rth at redhat dot com>
- Date: Mon, 8 Oct 2001 14:25:20 -0700
- Cc: gcc-patches at gcc dot gnu dot org, patches at x86-64 dot org
- References: <20011005204349.C17189@atrey.karlin.mff.cuni.cz>
On Fri, Oct 05, 2001 at 08:43:49PM +0200, Jan Hubicka wrote:
> for the setcc peepholer it is needed to peep2 recursivly - first
> to create new sequence and then to convert movl $0, reg to xor.
I'm not so sure this is a great idea. I'd rather handle the
mov/xor thing directly for now. If someone else comes up with
a better example of why re-scanning peepholes is helpful, I'll
reconsider then.
r~