- if (DECL_BIT_FIELD_TYPE (field))
- {
- unsigned int type_align = TYPE_ALIGN (type);
-
- /* Only the MS bitfields use this. We used to also put any kind of
- packed bit fields into prev_field, but that makes no sense, because
- an 8 bit packed bit field shouldn't impose more restriction on
- following fields than a char field, and the alignment requirements
- are also not fulfilled.
- There is no sane value to set rli->remaining_in_alignment to when
- a packed bitfield in prev_field is unaligned. */
- if (maximum_field_alignment != 0)
- type_align = MIN (type_align, maximum_field_alignment);
- gcc_assert (rli->prev_field
- || actual_align >= type_align || DECL_PACKED (field)
- || integer_zerop (DECL_SIZE (field))
- || !targetm.ms_bitfield_layout_p (rli->t));
- if (rli->prev_field == NULL && actual_align >= type_align
- && !integer_zerop (DECL_SIZE (field)))
- {
- rli->prev_field = field;
- /* rli->remaining_in_alignment has not been set if the bitfield
- has size zero, or if it is a packed bitfield. */
- rli->remaining_in_alignment
- = (tree_low_cst (TYPE_SIZE (TREE_TYPE (field)), 0)
- - tree_low_cst (DECL_SIZE (field), 0));
- rli->prev_packed = DECL_PACKED (field);
-
- }
- else if (rli->prev_field && DECL_PACKED (field))
- {
- HOST_WIDE_INT bitsize = tree_low_cst (DECL_SIZE (field), 0);
-
- if (rli->remaining_in_alignment < bitsize)
- rli->prev_field = NULL;
- else
- rli->remaining_in_alignment -= bitsize;
- }
- }