2013-09-12  Martin Jambor  <mjambor@suse.cz>

	PR ipa/58389
	* ipa-prop.c (remove_described_reference): Give up if the edge in the
	reference descriptor is NULL.
	(ipa_edge_removal_hook): If owning a reference descriptor, set its
	edge to NULL.

testsuite/
	* g++.dg/pr58389.C: New test.

From-SVN: r202532