* ree.c (find_removable_extensions): Clear the local bitmaps.

diff --git a/gcc/ree.c b/gcc/ree.c
index 13a7a05..3dc180c 100644
--- a/gcc/ree.c
+++ b/gcc/ree.c
@@ -1139,6 +1139,10 @@ find_removable_extensions (void)
     }
 
   XDELETEVEC (def_map);
+  bitmap_clear (&init);
+  bitmap_clear (&kill);
+  bitmap_clear (&gen);
+  bitmap_clear (&tmp);
 
   return insn_list;
 }