ipa: Bundle estimates of ipa_call_context::estimate_size_and_time

ipa: Bundle estimates of ipa_call_context::estimate_size_and_time

A subsequent patch adds another two estimates that the code in
ipa_call_context::estimate_size_and_time computes, and the fact that
the function has a special output parameter for each thing it computes
would make it have just too many.  Therefore, this patch collapses all
those ouptut parameters into one output structure.

gcc/ChangeLog:

2020-09-02  Martin Jambor  <mjambor@suse.cz>

	* ipa-inline-analysis.c (do_estimate_edge_time): Adjusted to use
	ipa_call_estimates.
	(do_estimate_edge_size): Likewise.
	(do_estimate_edge_hints): Likewise.
	* ipa-fnsummary.h (struct ipa_call_estimates): New type.
	(ipa_call_context::estimate_size_and_time): Adjusted declaration.
	(estimate_ipcp_clone_size_and_time): Likewise.
	* ipa-cp.c (hint_time_bonus): Changed the type of the second argument
	to ipa_call_estimates.
	(perform_estimation_of_a_value): Adjusted to use ipa_call_estimates.
	(estimate_local_effects): Likewise.
	* ipa-fnsummary.c (ipa_call_context::estimate_size_and_time): Adjusted
	to return estimates in a single ipa_call_estimates parameter.
	(estimate_ipcp_clone_size_and_time): Likewise.