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Re: rtl questions
- To: Bahman Sistany <bsistany at zucotto dot com>
- Subject: Re: rtl questions
- From: Richard Henderson <rth at redhat dot com>
- Date: Thu, 19 Jul 2001 10:04:54 -0700
- Cc: gcc at gcc dot gnu dot org
- References: <3B5700E9.38BCCB7@zucotto.com>
On Thu, Jul 19, 2001 at 11:46:49AM -0400, Bahman Sistany wrote:
> So obviously the constraints don't count in the matching here(?). But
> how about the predicates?
Only predicates count for define_expand, split, and peephole2.
> 2) Is it absolutley necessary to have a matching define_insn for a
> define_expand?
Yes. Rather it is not absolutely necessary to have a define_expand
for the define_insn. If nothing special needs to happen, you can
just name the define_insn appropriately.
r~