* except.c (use_eh_context): Don't copy_rtx a REG.
	(emit_throw): Lose old unwinder support.
	(expand_internal_throw): Likewise.
	* libgcc2.c (struct eh_context): Likewise.
	(new_eh_context): Likewise.
	(__get_eh_info): Lose redundant cast.
	(__get_dynamic_handler_chain): Likewise.
	(__get_saved_pc): Lose.
	Lose all old unwinder support code.

	* decl2.c (finish_file): Lose call to expand_builtin_throw.
	* except.c (expand_builtin_throw): Remove.
	* cp-tree.h: Remove ptr_ptr_type_node.
	* decl.c: Likewise.

From-SVN: r17054