X-Git-Url: http://git.sourceforge.jp/view?p=pf3gnuchains%2Fgcc-fork.git;a=blobdiff_plain;f=gcc%2Fcfghooks.c;h=10c04a8b0577baf4ffe4d1be0f790c130245106d;hp=0897b0df5653f07a050ee7a3bc04585ec3174a9f;hb=2c3933b87b056dce86c72fc95813f10d528e1a50;hpb=b4e5c32de33a35006cc9aa65a94af1fd9a816cd0

diff --git a/gcc/cfghooks.c b/gcc/cfghooks.c
index 0897b0df565..10c04a8b057 100644
--- a/gcc/cfghooks.c
+++ b/gcc/cfghooks.c
@@ -425,6 +425,7 @@ edge
 split_block (basic_block bb, void *i)
 {
   basic_block new_bb;
+  edge res;
 
   if (!cfg_hooks->split_block)
     internal_error ("%s does not support split_block", cfg_hooks->name);
@@ -450,7 +451,15 @@ split_block (basic_block bb, void *i)
 	bb->loop_father->latch = new_bb;
     }
 
-  return make_single_succ_edge (bb, new_bb, EDGE_FALLTHRU);
+  res = make_single_succ_edge (bb, new_bb, EDGE_FALLTHRU);
+
+  if (bb->flags & BB_IRREDUCIBLE_LOOP)
+    {
+      new_bb->flags |= BB_IRREDUCIBLE_LOOP;
+      res->flags |= EDGE_IRREDUCIBLE_LOOP;
+    }
+
+  return res;
 }
 
 /* Splits block BB just after labels.  The newly created edge is returned.  */