re PR ipa/65245 (internal compiler error: in address_matters_p, at symtab.c:1908)

re PR ipa/65245 (internal compiler error: in address_matters_p, at symtab.c:1908)

2015-02-28  Martin Liska  <mliska@suse.cz>
	    Jan Hubicka   <hubicka@ucw.cz>

	PR ipa/65245
	* ipa-icf-gimple.c (func_checker::compare_function_decl):
	Remove.
	(func_checker::compare_variable_decl): Skip symtab vars.
	(func_checker::compare_cst_or_decl): Update.
	* ipa-icf.c (sem_function::parse): Do not consider aliases.
	(sem_function::compare_cgraph_references): Add ADDRESS parameter;
	use correct symtab predicates.
	(sem_function::equals_wpa): Update uses of compare_cgraph_references.
	(sem_variable::parse):  Update comment.
	(sem_item_optimizer::build_graph): Consider ultimate aliases
	for references.

	* gcc.dg/ipa/ipa-icf-34.c: New test.

Co-Authored-By: Jan Hubicka <hubicka@ucw.cz>
From-SVN: r221090