* cgraph.c (cgraph_node::create_indirect_edge): Copy speculative data.
	* cgraph.h (cgraph_indirect_call_info): Add speculative data.
	* gimple-fold.c (fold_gimple_assign): Fix check for virtual
	call.
	* ipa-devirt.c (ipa_dummy_polymorphic_call_context): Update
	(contains_type_p): Forward declare.
	(polymorphic_call_target_hasher::hash): Hash speculative info.
	(polymorphic_call_target_hasher::equal): Compare speculative info.
	(get_class_context): Handle speuclation.
	(contains_type_p): Update.
	(get_polymorphic_call_info_for_decl): Update.
	(walk_ssa_copies): Break out from ...
	(get_polymorphic_call_info): ... here; set speculative context
	before giving up.
	* ipa-prop.c (ipa_write_indirect_edge_info, ipa_read_indirect_edge_info):
	Stream speculative context.
	* ipa-utils.h (ipa_polymorphic_call_context): Add speculative info
	(SPECULATIVE_OFFSET, SPECULATIVE_OUTER_TYPE,
	SPECULATIVE_MAYBE_DERIVED_TYPE).
	(possible_polymorphic_call_targets overriders): Update.
	(dump_possible_polymorphic_call_targets overriders): Update.
	(dump_possible_polymorphic_call_target_p overriders): Update.

From-SVN: r213152