invoke.texi (Wsuggest-final-types, [...]): Document.

invoke.texi (Wsuggest-final-types, [...]): Document.

	* doc/invoke.texi (Wsuggest-final-types, Wsuggest-final-methods): Document.
	* ipa-devirt.c: Include hash-map.h
	(struct polymorphic_call_target_d): Add type_warning and decl_warning.
	(clear_speculation): Break out of ...
	(get_class_context): ... here; speed up handling obviously useless
	speculations.
	(odr_type_warn_count, decl_warn_count): New structures.
	(final_warning_record): New structure.
	(final_warning_records): New static variable.
	(possible_polymorphic_call_targets): Cleanup handling of speculative info;
	do not build speculation when user do not care; record info about warnings
	when asked for.
	(add_decl_warning): New function.
	(type_warning_cmp): New function.
	(decl_warning_cmp): New function.
	(ipa_devirt): Handle -Wsuggest-final-methods and -Wsuggest-final-types.
	(gate): Enable pass when warnings are requested.
	* common.opt (Wsuggest-final-types, Wsuggest-final-methods): New options.

	* g++.dg/warn/Wsuggest-final.C: New testcase.
	* g++.dg/ipa/devirt-34.C: Fix.

From-SVN: r213518