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[Bug c/40987] Wrong optimization with if-conversion
- From: "thomas at coware dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 6 Aug 2009 19:25:09 -0000
- Subject: [Bug c/40987] Wrong optimization with if-conversion
- References: <bug-40987-18027@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #4 from thomas at coware dot com 2009-08-06 19:25 -------
By the way, I see the same failure also with gcc 4.1.2 and 4.2 without any fno-
options.
I thought it would be a good idea to hunt the problem down to a single
optimization mechanism, which seems to be if-conversion. I guess on 4.3 and 4.4
some of the tree optimizations change the code in a way that the problem is not
visible - but it is most likely there anyway and might be triggered by other
test cases.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40987