decl.c (maybe_pad_type): Use TYPE_SIZE_UNIT of the input type for TYPE_SIZE_UNIT...

decl.c (maybe_pad_type): Use TYPE_SIZE_UNIT of the input type for TYPE_SIZE_UNIT of result type if...

	* decl.c (maybe_pad_type): Use TYPE_SIZE_UNIT of the input type for
	TYPE_SIZE_UNIT of result type if SIZE is not specified.
	(make_aligning_type): Pass -1 as ADDRESSABLE to prevent the creation
	of a bitfield, which we know is useless and causes trouble because of
	alignment implications.

	* utils.c (create_var_decl): Set DECL_COMMON again on targets without
	BSS sections.
	(process_attributes): Clear DECL_COMMON again when a section attribute
	is present.
	(finish_record_type): Independently track if RECORD_TYPE has SIZE and/or
	SIZE_UNIT already set and use to compute final SIZE and SIZE_UNIT.
	(create_field_decl): Special case ADDRESSABLE negative to mean
	"no bitfield creation", to be used by make_aligning_type. Don't
	restrict bitfield creation to !ADDRESSABLE any more, as some BLKmode
	fields claimed addressable still have to be bitfields. Use
	value_factor_p instead of a raw binop construction to check for the
	position's alignment.

From-SVN: r91879