tree-chrec.c (chrec_convert_aggressive): Return NULL on failure.

	* tree-chrec.c (chrec_convert_aggressive): Return NULL on failure.

From-SVN: r115740

gcc/ChangeLog

+2006-07-25  Zdenek Dvorak <dvorakz@suse.cz>
+
+	* tree-chrec.c (chrec_convert_aggressive): Return NULL on failure.
+
 2006-07-25  Nick Clifton  <nickc@redhat.com>
 
 	* ggc-page.c (NUM_SIZE_LOOKUP): New constant - the length of the

gcc/tree-chrec.c

@@ -1326,7 +1326,7 @@ chrec_convert_aggressive (tree type, tree chrec)
 
   /* If we cannot perform arithmetic in TYPE, avoid creating an scev.  */
   if (avoid_arithmetics_in_type_p (type))
-    return false;
+    return NULL_TREE;
 
   left = CHREC_LEFT (chrec);
   right = CHREC_RIGHT (chrec);