* default.h (PROMOTE_PROTOTYPES): Remove.
	* system.h (PROMOTE_FUNCTION_RETURN, PROMOTE_PROTOTYPES,
	STRUCT_VALUE_REGNUM, SETUP_INCOMING_VARARGS,
	EXPAND_BUILTIN_SAVEREGS): Poison.
	* target-def.h (TARGET_PROMOTE_FUNCTION_RETURN): Define as
	hook_bool_tree_false.
	(TARGET_PROMOTE_PROTOTYPES): Likewise.
	* target.h: Replace SETUP_INCOMING_VARARGS with
	targetm.calls.setup_incoming_varargs().
	* targhooks.c (default_promote_function_return): Remove.
	(default_promote_prototypes): Likewise.
	(default_struct_value_rtx): Always abort().
	(default_expand_builtin_saveregs): Always print an error
	message.
	(default_setup_incoming_varargs): Do nothing.
	(default_pretend_outgoing_varargs_named): Don't depend on
	SETUP_INCOMING_VARARGS.
	* targhooks.h: Remove the prototype for
	default_promote_function_return and
	default_promote_prototypes.

From-SVN: r77477