* ipa-prop.h (ipa_get_controlled_uses): Add hack to avoid ICE
	when speculation is added.
	(ipa_edge_args): Add polymorphic_call_contexts.
	(ipa_get_ith_polymorhic_call_context): New accesor.
	(ipa_make_edge_direct_to_target): Add SPECULATIVE parameter.
	* ipa-prop.c (ipa_print_node_jump_functions_for_edge): Print contexts.
	(ipa_compute_jump_functions_for_edge): Compute contexts.
	(update_jump_functions_after_inlining): Update contexts.
	(ipa_make_edge_direct_to_target): Add SPECULATIVE argument;
	update dumping; add speculative edge creation.
	(try_make_edge_direct_virtual_call): Add CTX_PTR parameter; handle
	context updating.
	(update_indirect_edges_after_inlining): Pass down context.
	(ipa_edge_duplication_hook): Duplicate contexts.
	(ipa_write_node_info): Stream out contexts.
	(ipa_read_node_info): Stream in contexts.
	* ipa-devirt.c (type_all_derivations_known_p): Avoid ICE on non-ODR
	types.
	(try_speculative_devirtualization): New function.
	* ipa-utils.h (try_speculative_devirtualization): Declare.

From-SVN: r215794