builtins.c (c_strlen): Treat an offset too large for a HOST_WIDE_INT as out of range.

	* builtins.c (c_strlen): Treat an offset too large for a
	HOST_WIDE_INT as out of range.

From-SVN: r45550

gcc/ChangeLog

+2001-10-11  Matt Kraai  <kraai@alumni.carnegiemellon.edu>
+
+	* builtins.c (c_strlen): Treat an offset too large for a
+	HOST_WIDE_INT as out of range.
+
 Tue Sep 11 18:57:47 CEST 2001  Jan Hubicka  <jh@suse.cz>
 
 	* basic-block.h (EDGE_CRITICAL): Remove; renumber other flags.

gcc/builtins.c

@@ -265,8 +265,10 @@ c_strlen (src)
 
   /* We have a known offset into the string.  Start searching there for
      a null character if we can represent it as a single HOST_WIDE_INT.  */
-  if (offset_node == 0 || ! host_integerp (offset_node, 0))
+  if (offset_node == 0)
     offset = 0;
+  else if (! host_integerp (offset_node, 0))
+    offset = -1;
   else
     offset = tree_low_cst (offset_node, 0);