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Requesting scratch register
- From: "Natasha Wilson" <nat_w at operamail dot com>
- To: gcc at gcc dot gnu dot org
- Date: Tue, 15 Jul 2003 10:55:09 +0100
- Subject: Requesting scratch register
Hi all,
As written in MD Documentation, the pattern (clobber
(match_scratch)) would request for a scratch register for use in
particular insn. Is there any way to know if the scratch register
is available for use. I would clarify on my point. I'm generating
an insn
(parallel [(.............) (clobber (match_scratch:SI))])
That would give me a little improvement. But I don't want to
increase the register pressure. I would like to generate the above
insn in the situation where I could find a free scratch
register.
Regards and Thanks
Natasha
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