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[Bug middle-end/35519] COMBINE repeating same matches and can SEG fault
- 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: 10 Mar 2008 20:04:09 -0000
- Subject: [Bug middle-end/35519] COMBINE repeating same matches and can SEG fault
- References: <bug-35519-7746@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from steven at gcc dot gnu dot org 2008-03-10 20:04 -------
The patch makes adding log use an algorithm quadratic in the number of log
links per insn. It is probably better to:
1. build the log links.
2. filter out the duplicates as a post pass (and maybe sort them while at it?)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35519