Sat Dec 29 15:48:54 2001 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
+ * stor-layout.c (layout_decl): Don't misalign field of variable size
+ for packed record.
+
* dwarf2out.c (compute_section_prefix): Avoid cast warning.
(gen_decl_die): Only check DECL_IGNORED_P on decls.
(dwarf2out_decl): Check for DECL_IGNORED_P only when needed.
DECL_BIT_FIELD_TYPE (decl) = DECL_BIT_FIELD (decl) ? type : 0;
if (maximum_field_alignment != 0)
DECL_ALIGN (decl) = MIN (DECL_ALIGN (decl), maximum_field_alignment);
- else if (DECL_PACKED (decl))
+
+ /* If the field is of variable size, we can't misalign it since we
+ have no way to make a temporary to align the result. But this
+ isn't an issue if the decl is not addressable. Likewise if it
+ is of unknown size. */
+ else if (DECL_PACKED (decl)
+ && (DECL_NONADDRESSABLE_P (decl)
+ || DECL_SIZE_UNIT (decl) == 0
+ || TREE_CODE (DECL_SIZE_UNIT (decl)) == INTEGER_CST))
{
DECL_ALIGN (decl) = MIN (DECL_ALIGN (decl), BITS_PER_UNIT);
DECL_USER_ALIGN (decl) = 0;