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Re: PRE lossage
- From: Andrew MacLeod <amacleod at redhat dot com>
- To: Jeff Law <law at redhat dot com>
- Cc: Daniel Berlin <dberlin at dberlin dot org>, gcc mailing list <gcc at gcc dot gnu dot org>
- Date: 28 Oct 2003 14:23:16 -0500
- Subject: Re: PRE lossage
- References: <200310281917.h9SJHxNH016225@speedy.slc.redhat.com>
On Tue, 2003-10-28 at 14:17, law@redhat.com wrote:
> In message <64E3BF94-097A-11D8-A9DD-000A95AF1FAE@dberlin.org>, Daniel Berlin wr
> ites:
> >I've been putting off these bugs until switch lowering happens, since
> >that should allow us to pre-split the critical edges without any
> >trouble, and once that happens, insertion shouldn't require creating
> >new blocks, ever, and the whole problem goes away.
> I would be very wary of pre-splitting critical edges. In my experience, it
> loses, badly. Interestingly enough I was pre-splitting critical edges to
> help with PRE when I ran into the lame behavior.
Once we get everything lowered, the need to pre-split should dissappear.
Andrew