diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c5238646b0b5849c79c2b9d68b2689574ef980b9..eeedbaf0ce1dde861bfc097ce53901c610e50ecb 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2001-07-11  Richard Sandiford  <rsandifo@redhat.com>
+
+	* simplify-rtx.c (simplify_gen_subreg): Return null for QUEUED rtxes.
+
 2001-07-11  Richard Sandiford  <rsandifo@redhat.com>
 
 	* config/mips/mips.c (gen_int_relational): Tell the caller not to
diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c
index b5006d83de39fd9a4d17568b99cf95ba92e35def..a455f417023087d67f7651bcb27372cc3b8129e1 100644
--- a/gcc/simplify-rtx.c
+++ b/gcc/simplify-rtx.c
@@ -2446,6 +2446,9 @@ simplify_gen_subreg (outermode, op, innermode, byte)
       || byte >= GET_MODE_SIZE (innermode))
     abort ();
 
+  if (GET_CODE (op) == QUEUED)
+    return NULL_RTX;
+
   new = simplify_subreg (outermode, op, innermode, byte);
   if (new)
     return new;