* ipa-cp.c (ipcp_cloning_candidate_p): Use node->optimize_for_size_p.

	* ipa-cp.c (ipcp_cloning_candidate_p): Use node->optimize_for_size_p.
	(good_cloning_opportunity_p): Likewise.
	(gather_context_independent_values): Do not return true when
	polymorphic call context is known or when we have known aggregate
	value of unused parameter.
	(estimate_local_effects): Try to create clone for all context
	when either some params are substituted or devirtualization is possible
	or some params can be removed; use local flag instead of
	node->will_be_removed_from_program_if_no_direct_calls_p.
	(identify_dead_nodes): Likewise.

	* gcc.c-torture/execute/20010122-1.c: Disable cloning.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@231540 138bc75d-0d04-0410-961f-82ee72b054a4