re PR ipa/65432 (Invalid read of size 1: ipa_icf::sem_item_optimizer::merge_classes(unsigned int) (ipa-icf.c:2958))

Fix PR ipa/65432

	PR ipa/65432
	* cgraph.c (cgraph_node::get_create): Remove unnecessary
	xstrdup_for_dump wrapper.
	* ipa-icf.c (sem_item::dump): Use symtab_node::name instead of
	sem_item::name.
	(sem_function::equals): Wrap symtab_node::name and symtab_node::asm_name
	with xstrdup_for_dump.
	(sem_variable::equals): Likewise.
	(sem_item_optimizer::read_section): Use symtab_node::name instead of
	sem_item::name.
	(sem_item_optimizer::parse_funcs_and_vars): Likewise.
	(sem_item_optimizer::merge_classes): Wrap symtab_node::name and
	symtab_node::asm_name with xstrdup_for_dump.
	(congruence_class::dump): Use symtab_node::name instead of
	sem_item::name.
	* ipa-icf.h (symtab_node::name): Remove.
	(symtab_node::asm_name): Likewise.

From-SVN: r221491