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[Bug middle-end/18499] [4.0 Regression] quadratic behavior in cfgexpand
- From: "stevenb at suse dot de" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 15 Nov 2004 10:41:31 -0000
- Subject: [Bug middle-end/18499] [4.0 Regression] quadratic behavior in cfgexpand
- References: <20041115102527.18499.steven@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From stevenb at suse dot de 2004-11-15 10:41 -------
Subject: Re: [4.0 Regression] quadratic behavior in cfgexpand
Actually this has always been there, independent of the edge vector
work. The old code has exactly the same problem.
There is *no* canonical way to remove many edges. Apparently we
should have one.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18499