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Re: Question on fixup_abnormal_edges
- From: Richard Henderson <rth at redhat dot com>
- To: Richard Kenner <kenner at vlsi1 dot ultra dot nyu dot edu>
- Cc: gcc at gcc dot gnu dot org
- Date: Tue, 15 Oct 2002 21:19:01 -0700
- Subject: Re: Question on fixup_abnormal_edges
- References: <10210160215.AA19349@vlsi1.ultra.nyu.edu>
On Tue, Oct 15, 2002 at 10:15:43PM -0400, Richard Kenner wrote:
> I don't think so. How are we supposed to ensure that the insns on that
> abnormal edge are executed when the exception occurs?
This is an EH edge, not an arbitrary abnormal edge. We can redirect the
destination of the edge and create a new landing pad with whatever we
like on it.
Admittedly some of the code for that isn't written, but it's possible.
It would be easier to disallow call-clobbered registers across that edge.
r~