toplev.c (rest_of_compilation): Rebuild label notes after post-reload splitting pass if...

	* toplev.c (rest_of_compilation): Rebuild label notes after
	post-reload splitting pass if new labels have been created.

From-SVN: r35892

gcc/ChangeLog

+Tue Aug 22 21:21:05 2000  J"orn Rennecke <amylaar@cygnus.co.uk>
+
+	* toplev.c (rest_of_compilation): Rebuild label notes after
+	post-reload splitting pass if new labels have been created.
+
 2000-08-22  Gabriel Dos Reis  <gdr@codesourcery.com>
 
 	* diagnostic.h (output_buffer_state): New macro.

gcc/toplev.c

@@ -3380,7 +3380,12 @@ rest_of_compilation (decl)
   /* If optimizing, then go ahead and split insns now since we are about
      to recompute flow information anyway.  */
   if (optimize > 0)
-    split_all_insns (0);
+    {
+      int old_labelnum = max_label_num ();
+
+      split_all_insns (0);
+      rebuild_label_notes_after_reload |= old_labelnum != max_label_num ();
+    }
 
   /* Register allocation and reloading may have turned an indirect jump into
      a direct jump.  If so, we must rebuild the JUMP_LABEL fields of