http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49452
--- Comment #12 from Easwaran Raman <eraman at google dot com> 2011-07-14 17:16:06 UTC --- (In reply to comment #11) > I have confirmed that the -Os failures began with r175063 and that the tests > pass for several revision before that and pass for several after, so it's > unlikely to be an intermittent failure. If it would help I can send dump > files > for r175063 and the one just before that. It is possible that the second DSE invocation deletes a necessary store. My understanding was that it only acts on spilled stores and all my changes are in the _nospill version, but that seems not to be the case. Could you send me all the RTL dumps with and without this patch as a tar file? That will be very useful in narrowing it down. Thanks, Easwaran