Patch fixing 3.3 bug 9745 / 10021

[David Edelsohn]

>>>>> Marcus Meissner writes:

Marcus> Bugzilla entry 10021 contains a patch fixing the 'critical' 3.3 regression
Marcus> in bug 9745 from Jim Wilson.

Marcus> Can someone please review the patch for inclusion into the 3.3 branch
Marcus> (and 3.4)?

Marcus> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=10021

Marcus> Patch is in attached file:

Marcus> http://gcc.gnu.org/bugzilla/attachment.cgi?id=4306&action=view

	If the patch goes in, I will immediately open a critical
performance regression bug against 3.3 and 3.4.  As with my earlier patch
for PR 9475, the proposed patch is too conservative and disables too much
alias-based optimizations.

David