2008-11-03 Sebastian Pop <sebastian.pop@amd.com>

[pf3gnuchains/gcc-fork.git] / gcc / cfghooks.c

diff --git a/gcc/cfghooks.c b/gcc/cfghooks.c
index 0897b0d..10c04a8 100644 (file)
--- a/gcc/cfghooks.c
+++ b/gcc/cfghooks.c
@@ -425,6 +425,7 @@ edge
 split_block (basic_block bb, void *i)
 {
   basic_block new_bb;
 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);
 
   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;
     }
 
        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.  */
 }
 
 /* Splits block BB just after labels.  The newly created edge is returned.  */