[PATCH] Fix ObjC garbage collection issues

[Jakub Jelinek]

Hi!

I think the patch is rather obvious, I'm not sending testcase since it is
big (as usually are testcases which trigger GC bugs unless one runs with
always collecting enabled).
Ok to commit (what about for the branch)?

2001-02-15  Jakub Jelinek  <jakub@redhat.com>

	* objc/objc-act.c (start_class): Register implemented_classes with
	GC.

--- gcc/objc/objc-act.c.jj	Mon Feb 12 10:30:13 2001
+++ gcc/objc/objc-act.c	Thu Feb 15 17:07:56 2001
@@ -6130,7 +6130,10 @@ start_class (code, class_name, super_nam
     {
       {
         static tree implemented_classes = 0;
-        tree chain = implemented_classes;
+        tree chain;
+
+	if (!implemented_classes)
+	  ggc_add_tree_root (&implemented_classes, 1);
         for (chain = implemented_classes; chain; chain = TREE_CHAIN (chain))
            if (TREE_VALUE (chain) == class_name)
 	     {

	Jakub