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[Bug tree-optimization/18888] [4.0 regression] loops miscompiled
- From: "law at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 14 Dec 2004 17:55:16 -0000
- Subject: [Bug tree-optimization/18888] [4.0 regression] loops miscompiled
- References: <20041208144915.18888.schwab@suse.de>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From law at redhat dot com 2004-12-14 17:55 -------
BTW, it's pretty easy now that I've sat down and analyzed this test to see
that my tree-ssa-dom.c patch from yesterday to fix pr18694 merely masked this
bug (pr18888) on Darwin.
As I mentioned earlier today, pr18888 is a problem in how we handle
coalescing and abnormal edges and is going to be very sensitive to the
precise order in which we decide to coalesce objects.
Yesterday's tree-ssa-dom.c patch for 18694 can very easily change coalescing
orderings and thus could easily mask this bug.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18888