diff --git a/gcc/basic-block.h b/gcc/basic-block.h
index 90eb57b..8407c4a 100644
--- a/gcc/basic-block.h
+++ b/gcc/basic-block.h
@@ -752,6 +752,7 @@ extern bool predictable_edge_p (edge);
 extern void init_flow (struct function *);
 extern void debug_bb (basic_block);
 extern basic_block debug_bb_n (int);
+extern basic_block debug_bb_range (int, int);
 extern void dump_flow_info (FILE *, int);
 extern void expunge_block (basic_block);
 extern void link_block (basic_block, basic_block);
diff --git a/gcc/cfg.c b/gcc/cfg.c
index 9e4380c..d34f27e 100644
--- a/gcc/cfg.c
+++ b/gcc/cfg.c
@@ -663,6 +663,21 @@ debug_bb_n (int n)
   return bb;
 }
 
+/* Dumps cfg related information about basic blocks, from number 'S'
+   to number E, to stderr.  */
+
+DEBUG_FUNCTION basic_block
+debug_bb_range (int s, int e)
+{
+  basic_block bb =  NULL;
+  for (int i = s; i <= e; ++i)
+    {
+      bb = BASIC_BLOCK (i);
+      debug_bb (bb);
+    }
+  return bb;
+}
+
 /* Dumps cfg related information about basic block BB to OUTF.
    If HEADER is true, dump things that appear before the instructions
    contained in BB.  If FOOTER is true, dump things that appear after.