re PR ipa/65478 (crafty performance regression)

re PR ipa/65478 (crafty performance regression)

	PR ipa/65478
	* params.def (PARAM_IPA_CP_RECURSION_PENALTY) : New.
	(PARAM_IPA_CP_SINGLE_CALL_PENALTY): Likewise.
	* ipa-prop.h (ipa_node_params): New flags node_within_scc and
	node_calling_single_call.
	* ipa-cp.c (count_callers): New function.
	(set_single_call_flag): Likewise.
	(initialize_node_lattices): Count callers and set single_flag_call if
	necessary.
	(incorporate_penalties): New function.
	(good_cloning_opportunity_p): Use it, dump new flags.
	(propagate_constants_topo): Set node_within_scc flag if appropriate.
	* doc/invoke.texi (ipa-cp-recursion-penalty,
	ipa-cp-single-call-pentalty): Document.

From-SVN: r221763