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diff --git a/gcc/tree-logical-location.h b/gcc/tree-logical-location.h
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+/* Subclasses of logical_location with knowledge of "tree".
+   Copyright (C) 2022 Free Software Foundation, Inc.
+   Contributed by David Malcolm <dmalcolm@redhat.com>.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 3, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+
+#ifndef GCC_TREE_LOGICAL_LOCATION_H
+#define GCC_TREE_LOGICAL_LOCATION_H
+
+#include "logical-location.h"
+
+/* Abstract subclass of logical_location, with knowledge of "tree", but
+   for no specific tree.  */
+
+class compiler_logical_location : public logical_location
+{
+ protected:
+  static const char *get_short_name_for_tree (tree);
+  static const char *get_name_with_scope_for_tree (tree);
+  static const char *get_internal_name_for_tree (tree);
+  static enum logical_location_kind get_kind_for_tree (tree);
+};
+
+/* Concrete subclass of logical_location, with reference to a specific
+   tree.  */
+
+class tree_logical_location : public compiler_logical_location
+{
+public:
+  tree_logical_location (tree decl) : m_decl (decl) {}
+
+  const char *get_short_name () const final override;
+  const char *get_name_with_scope () const final override;
+  const char *get_internal_name () const final override;
+  enum logical_location_kind get_kind () const final override;
+
+private:
+  tree m_decl;
+};
+
+/* Concrete subclass of logical_location, with reference to
+   current_function_decl.  */
+
+class current_fndecl_logical_location : public compiler_logical_location
+{
+public:
+  const char *get_short_name () const final override;
+  const char *get_name_with_scope () const final override;
+  const char *get_internal_name () const final override;
+  enum logical_location_kind get_kind () const final override;
+};
+
+#endif /* GCC_TREE_LOGICAL_LOCATION_H.  */