--- a/gcc/tree-cfg.h	Thu Oct 25 07:37:49 2018 +0900
+++ b/gcc/tree-cfg.h	Thu Feb 13 11:34:05 2020 +0900
@@ -1,5 +1,5 @@
 /* Data and Control Flow Analysis for Trees.
-   Copyright (C) 2001-2018 Free Software Foundation, Inc.
+   Copyright (C) 2001-2020 Free Software Foundation, Inc.
    Contributed by Diego Novillo <dnovillo@redhat.com>
 
 This file is part of GCC.
@@ -83,12 +83,12 @@
 extern void debug_function (tree, dump_flags_t);
 extern void print_loops_bb (FILE *, basic_block, int, int);
 extern void print_loops (FILE *, int);
-extern void debug (struct loop &ref);
-extern void debug (struct loop *ptr);
-extern void debug_verbose (struct loop &ref);
-extern void debug_verbose (struct loop *ptr);
+extern void debug (class loop &ref);
+extern void debug (class loop *ptr);
+extern void debug_verbose (class loop &ref);
+extern void debug_verbose (class loop *ptr);
 extern void debug_loops (int);
-extern void debug_loop (struct loop *, int);
+extern void debug_loop (class loop *, int);
 extern void debug_loop_num (unsigned, int);
 extern void remove_edge_and_dominated_blocks (edge);
 extern bool gimple_purge_dead_eh_edges (basic_block);
@@ -105,7 +105,7 @@
 extern tree find_case_label_for_value (const gswitch *switch_stmt, tree val);
 extern edge find_taken_edge_switch_expr (const gswitch *switch_stmt, tree val);
 extern unsigned int execute_fixup_cfg (void);
-extern unsigned int split_critical_edges (void);
+extern unsigned int split_critical_edges (bool for_edge_insertion_p = false);
 extern basic_block insert_cond_bb (basic_block, gimple *, gimple *,
 				   profile_probability);
 extern bool gimple_find_sub_bbs (gimple_seq, gimple_stmt_iterator *);
@@ -128,4 +128,11 @@
 	  && !TREE_ADDRESSABLE (TREE_TYPE (lhs)));
 }
 
+
+inline unsigned int
+split_edges_for_insertion ()
+{
+  return split_critical_edges (/*for_edge_insertion_p=*/true);
+}
+
 #endif /* _TREE_CFG_H  */