re PR middle-end/43812 (compiling .cc file with -fwhole-program results in...

re PR middle-end/43812 (compiling .cc file with -fwhole-program results in ICE, in ipcp_iterate_stage, at ipa-cp.c:760)

2010-04-27  Martin Jambor  <mjambor@suse.cz>

	PR middle-end/43812
	* ipa.c (dissolve_same_comdat_group_list): New function.
	(function_and_variable_visibility): Call
	dissolve_same_comdat_group_list when comdat group contains external or
	newly local nodes.
	* cgraphunit.c (verify_cgraph_node): Verify that same_comdat_group
	lists are circular and that they contain only DECL_ONE_ONLY nodes.

	* testsuite/g++.dg/ipa/pr43812.C: New test.

From-SVN: r158777