/* A named bit field of declared type `int'
forces the entire structure to have `int' alignment. */
if (DECL_NAME (field) != 0)
- record_align = MAX (record_align, TYPE_ALIGN (TREE_TYPE (field)));
+ {
+ int type_align = TYPE_ALIGN (TREE_TYPE (field));
+ if (maximum_field_alignment != 0)
+ type_align = MIN (type_align, maximum_field_alignment);
+
+ record_align = MAX (record_align, type_align);
+ }
}
else
record_align = MAX (record_align, desired_align);
register tree dsize = DECL_SIZE (field);
int field_size = TREE_INT_CST_LOW (dsize);
+ if (maximum_field_alignment != 0)
+ type_align = MIN (type_align, maximum_field_alignment);
+
/* A bit field may not span the unit of alignment of its type.
Advance to next boundary if necessary. */
+ /* ??? There is some uncertainty here as to what
+ should be done if type_align is less than the width of the type.
+ That can happen because the width exceeds BIGGEST_ALIGNMENT
+ or because it exceeds maximum_field_alignment. */
if (const_size / type_align
!= (const_size + field_size - 1) / type_align)
const_size = CEIL (const_size, type_align) * type_align;
register tree dsize = DECL_SIZE (field);
int field_size = TREE_INT_CST_LOW (dsize);
+ if (maximum_field_alignment != 0)
+ type_align = MIN (type_align, maximum_field_alignment);
+
/* A bit field may not span the unit of alignment of its type.
Advance to next boundary if necessary. */
if (const_size / type_align