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[Bug middle-end/18499] [4.0 Regression] quadratic behavior in cfgexpand
- From: "steven at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 24 Nov 2004 11:12:30 -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 steven at gcc dot gnu dot org 2004-11-24 11:12 -------
(From update of attachment 7547)
The problem was searching edges the edge->dest block in remove_edge,
but we now have dest_idx on for edge (thanks to Kazu's O(1) PHI arg
lookup patches) so we don't have to search the dest block anymore.
So I suspect at least the part of the problem that put remove_edge
high up in the profile is now fixed, and my patch is obsolete. I'll
reprofile and see what else we can do to speed up this test case...
--
What |Removed |Added
----------------------------------------------------------------------------
Attachment #7547 is|0 |1
obsolete| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18499