LANG_HOOK_REGISTER_DUMPS
	gcc/
	* toplev.c (general_init): Call	register dump lang hook.
	* doc/invoke.texi: Document -fdump-lang option family.
	* dumpfile.c (dump_files): Remove class dump here.
	(FIRST_AUTO_NUMBERED_DUMP): Adjust.
	* dumpfile.h (tree_dump_index): Remove TDI_class.
	* langhooks-def.h (lhd_register_dumps): Declare.
	(LANG_HOOKS_REGISTER_DUMPS): Define.
	(LANG_HOOKS_INITIALIZER): Add it.
	* langhooks.c (lhd_register_dumps): Define.
	* langhooks.h (struct lang_hooks): Add register_dumps.
	c-family/
	* c-opts.c (class_dump_file, class_dump_flags): Delete.
	(c_common_parse_file): Remove class dump handling.
	(get_dump_info): Likewise.
	cp/
	* class.c (class_dump_id): Define.
	(dump_class_hierarchy, dump_vtable, dump_vtt): Use it.
	* cp-objcp-common.c (cp_register_dumps): New.
	* cp-objcp-common.h (cp_register_dumps): Declare.
	(LANG_HOOKS_REGISTER_DUMPS): Override.
	* cp-tree.h (class_dump_id): Declare.
	testsuite/
	* g++.dg/inherit/covariant7.C: Adjust.

From-SVN: r248271