* cp-tree.h (mangle_type): Remove.
	* mangle.c (globals): GTY it.
	(mangle_obstack): New variable.
	(name_obstack): Likewise.
	(name_base): Likewise.
	(write_char): Adjust accordingly.
	(write_chars): Likewise.
	(write_string): Likewise.
	(start_mangling): Initialize G.substitutions only one.  Add
	ident_p parameter.
	(finish_mangling): Use VARRAY_CLEAR to reclaim
	storage in G.substitutions.  Use obstack_finish.
	(init_mangle): Adjust for changes to variable names above.
	Initialize G.substitutions.
	(mangle_decl_string): Adjust call to start_mangling.
	(get_identifier_nocopy): New function.
	(mangle_decl): Use it.
	(mangle_type_string): Adjust call to start_mangling.
	(mangle_special_for_type): Likewise.
	(mangle_vtt_for_type): Likewise.
	(mangle_ctor_vtbl_for_type): Likewise.
	(mangle_thunk): Likewise.
	(mangle_guard_variable): Likewise.
	(mangle_ref_init_variable): Likewise.

From-SVN: r86559