diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 417ba205198f63822bc1cbe75dcc25a77910d215..3340e062fcb346d176217834e3e2e824ffeb27e1 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2004-04-15  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* builtins.def (BUILT_IN_ISDIGIT, BUILT_IN_ISXDIGIT): Mark with
+	ATTR_CONST_NOTHROW_LIST.
+
 2004-04-15  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
 
 	PR/middle-end 14915
diff --git a/gcc/builtins.def b/gcc/builtins.def
index 0d2be2c437a82ce0979faa5feed21d4a1dfd4bc5..72f5f254cef762589410ecfa4ed804d153034719 100644
--- a/gcc/builtins.def
+++ b/gcc/builtins.def
@@ -504,14 +504,14 @@ DEF_LIB_BUILTIN        (BUILT_IN_ISALPHA, "isalpha", BT_FN_INT_INT, ATTR_PURE_NO
 DEF_EXT_LIB_BUILTIN    (BUILT_IN_ISASCII, "isascii", BT_FN_INT_INT, ATTR_CONST_NOTHROW_LIST)
 DEF_C99_BUILTIN        (BUILT_IN_ISBLANK, "isblank", BT_FN_INT_INT, ATTR_PURE_NOTHROW_LIST)
 DEF_LIB_BUILTIN        (BUILT_IN_ISCNTRL, "iscntrl", BT_FN_INT_INT, ATTR_PURE_NOTHROW_LIST)
-DEF_LIB_BUILTIN        (BUILT_IN_ISDIGIT, "isdigit", BT_FN_INT_INT, ATTR_PURE_NOTHROW_LIST)
+DEF_LIB_BUILTIN        (BUILT_IN_ISDIGIT, "isdigit", BT_FN_INT_INT, ATTR_CONST_NOTHROW_LIST)
 DEF_LIB_BUILTIN        (BUILT_IN_ISGRAPH, "isgraph", BT_FN_INT_INT, ATTR_PURE_NOTHROW_LIST)
 DEF_LIB_BUILTIN        (BUILT_IN_ISLOWER, "islower", BT_FN_INT_INT, ATTR_PURE_NOTHROW_LIST)
 DEF_LIB_BUILTIN        (BUILT_IN_ISPRINT, "isprint", BT_FN_INT_INT, ATTR_PURE_NOTHROW_LIST)
 DEF_LIB_BUILTIN        (BUILT_IN_ISPUNCT, "ispunct", BT_FN_INT_INT, ATTR_PURE_NOTHROW_LIST)
 DEF_LIB_BUILTIN        (BUILT_IN_ISSPACE, "isspace", BT_FN_INT_INT, ATTR_PURE_NOTHROW_LIST)
 DEF_LIB_BUILTIN        (BUILT_IN_ISUPPER, "isupper", BT_FN_INT_INT, ATTR_PURE_NOTHROW_LIST)
-DEF_LIB_BUILTIN        (BUILT_IN_ISXDIGIT, "isxdigit", BT_FN_INT_INT, ATTR_PURE_NOTHROW_LIST)
+DEF_LIB_BUILTIN        (BUILT_IN_ISXDIGIT, "isxdigit", BT_FN_INT_INT, ATTR_CONST_NOTHROW_LIST)
 DEF_EXT_LIB_BUILTIN    (BUILT_IN_TOASCII, "toascii", BT_FN_INT_INT, ATTR_CONST_NOTHROW_LIST)
 DEF_LIB_BUILTIN        (BUILT_IN_TOLOWER, "tolower", BT_FN_INT_INT, ATTR_PURE_NOTHROW_LIST)
 DEF_LIB_BUILTIN        (BUILT_IN_TOUPPER, "toupper", BT_FN_INT_INT, ATTR_PURE_NOTHROW_LIST)