* langhooks.h (struct lang_hooks_for_types): Remove hash_types field.
	* langhooks-def.h (LANG_HOOKS_HASH_TYPES): Delete.
	(LANG_HOOKS_FOR_TYPES_INITIALIZER): Remove LANG_HOOKS_HASH_TYPES.
	* system.h (LANG_HOOKS_HASH_TYPES): Poison.
	* tree.c (type_hash_canon): Do not test lang_hooks.types.hash_types.
	(build_nonstandard_integer_type): Likewise.
	(build_range_type_1): New function, built from...
	(build_range_type): ...this.  Call build_range_type_1.
	(build_nonshared_range_type): New function.
	(build_array_type_1): New function, built from...
	(build_array_type: ...this.  Call build_array_type_1.
	(build_nonshared_array_type): New function.
	* tree.h (build_nonshared_range_type): Declare.
	(build_nonshared_array_type): Likewise.
ada/
	* gcc-interface/decl.c (gnat_to_gnu_entity): Replace calls to
	build_array_type with calls to build_nonshared_array_type.
	(substitute_in_type): Likewise.
	* gcc-interface/misc.c (LANG_HOOKS_HASH_TYPES): Delete.
	(LANG_HOOKS_TYPE_HASH_EQ): Define.
	(gnat_post_options): Add 'static' keyword.
	(gnat_type_hash_eq): New static function.
	* gcc-interface/utils.c (fntype_same_flags_p): New function.
	(create_subprog_type): Call it.
	(create_index_type): Call build_nonshared_range_type and tidy up.
	(create_range_type): Likewise.
	* gcc-interface/gigi.h (fntype_same_flags_p): Declare.

From-SVN: r164452