2015-12-15  Martin Jambor  <mjambor@suse.cz>

	PR ipa/68851
	* cgraph.c (collect_callers_of_node_1): Do not collect thunks.
	* cgraph.h (cgraph_node): Change comment of collect_callers.

testsuite/
	* g++.dg/ipa/pr68851.C: New test.

From-SVN: r231648