diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 0b2febd597e5..76914efa78bb 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2006-04-23  Eric Botcazou  <ebotcazou@adacore.com>
+
+	* fold-const.c (range_predecessor): Use operand_equal_p
+	as the predicate for equality.
+	(range_successor): Likewise.
+
 2006-04-22  Kazu Hirata  <kazu@codesourcery.com>
 
 	Revert:
diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index 39bd36689d5b..567168276e19 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -4158,7 +4158,8 @@ range_predecessor (tree val)
 {
   tree type = TREE_TYPE (val);
 
-  if (INTEGRAL_TYPE_P (type) && val == TYPE_MIN_VALUE (type))
+  if (INTEGRAL_TYPE_P (type)
+      && operand_equal_p (val, TYPE_MIN_VALUE (type), 0))
     return 0;
   else
     return range_binop (MINUS_EXPR, NULL_TREE, val, 0, integer_one_node, 0);
@@ -4171,7 +4172,8 @@ range_successor (tree val)
 {
   tree type = TREE_TYPE (val);
 
-  if (INTEGRAL_TYPE_P (type) && val == TYPE_MAX_VALUE (type))
+  if (INTEGRAL_TYPE_P (type)
+      && operand_equal_p (val, TYPE_MAX_VALUE (type), 0))
     return 0;
   else
     return range_binop (PLUS_EXPR, NULL_TREE, val, 0, integer_one_node, 0);