diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index b4ca68f3312..b9f58c10a3c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2000-10-20  Mark Mitchell  <mark@codesourcery.com>
+
+	* tree.h (DECL_ALIGN_UNIT): New macro.
+
 2000-10-14  Marek Michalkiewicz  <marekm@linux.org.pl>
 
 	* config/avr/avr-protos.h (avr_output_bld): New.
diff --git a/gcc/tree.h b/gcc/tree.h
index 68ccbbf8dd3..d8cc50872d7 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -1309,8 +1309,10 @@ struct tree_type
 #define DECL_SIZE(NODE) (DECL_CHECK (NODE)->decl.size)
 /* Likewise for the size in bytes.  */
 #define DECL_SIZE_UNIT(NODE) (DECL_CHECK (NODE)->decl.size_unit)
-/* Holds the alignment required for the datum.  */
+/* Holds the alignment required for the datum, in bits.  */
 #define DECL_ALIGN(NODE) (DECL_CHECK (NODE)->decl.u1.a.align)
+/* The alignment of NODE, in bytes.  */
+#define DECL_ALIGN_UNIT(NODE) (DECL_ALIGN (NODE) / BITS_PER_UNIT)
 /* For FIELD_DECLs, off_align holds the number of low-order bits of
    DECL_FIELD_OFFSET which are known to be always zero.
    DECL_OFFSET_ALIGN thus returns the alignment that DECL_FIELD_OFFSET