1 files changed, 12 insertions, 1 deletions
diff --git a/gcc/tree-pass.h b/gcc/tree-pass.h
index 787a49b..b2182c5 100644
--- a/gcc/tree-pass.h
+++ b/gcc/tree-pass.h
@@ -76,11 +76,22 @@ namespace gcc
 
 /* An instance of a pass.  This is also "pass_data" to minimize the
    changes in existing code.  */
-class opt_pass : public pass_data
+class GTY((user)) opt_pass : public pass_data
 {
 public:
+  /* Ensure that instances are allocated in the GC-managed heap.  */
+  void *operator new (size_t sz);
+
   virtual ~opt_pass () { }
 
+  /* GTY((user)) methods, to be called once per traversal.
+     opt_pass subclasses with additional GC-managed data should override
+     these, chain up to the base class implementation, then walk their
+     extra fields.  */
+  virtual void gt_ggc_mx ();
+  virtual void gt_pch_nx ();
+  virtual void gt_pch_nx_with_op (gt_pointer_operator op, void *cookie);
+
   /* Create a copy of this pass.
 
      Passes that can have multiple instances must provide their own