------- Additional Comments From law at redhat dot com 2004-12-09 23:23 -------
Subject: Re: [4.0 regression] loop
miscompilation at -O1 (-ftree-ch)
On Thu, 2004-12-09 at 20:02 +0000, kazu at cs dot umass dot edu wrote:
> ------- Additional Comments From kazu at cs dot umass dot edu 2004-12-09
> 20:02 -------
> Created an attachment (id=7715)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=7715&action=view)
> --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=7715&action=view)
> a new patch
>
> This patch is basically the same as the last patch except that
> I've added a fast path for common cases.
>
> I am testing this with submission to gcc-patches@ in mind.
I believe your fast-path check is effectively equivalent to
if ((e->flags & EDGE_DFS_BACK) == 0)
Jeff
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18694
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