--- a/gcc/cfghooks.c	Sun Feb 07 18:28:00 2010 +0900
+++ b/gcc/cfghooks.c	Fri Feb 12 23:39:51 2010 +0900
@@ -437,6 +437,7 @@
   new_bb->count = bb->count;
   new_bb->frequency = bb->frequency;
   new_bb->loop_depth = bb->loop_depth;
+  new_bb->discriminator = bb->discriminator;
 
   if (dom_info_available_p (CDI_DOMINATORS))
     {
@@ -769,7 +770,7 @@
               && dummy->loop_father->header == dummy
               && dummy->loop_father->latch == e_src)
             dummy->loop_father->latch = jump;
-          
+
           if (new_bb_cbk != NULL)
             new_bb_cbk (jump);
         }
@@ -829,7 +830,7 @@
 /* Fix up edges that now fall through, or rather should now fall through
    but previously required a jump around now deleted blocks.  Simplify
    the search by only examining blocks numerically adjacent, since this
-   is how find_basic_blocks created them.  */
+   is how they were created.  */
 
 void
 tidy_fallthru_edges (void)
@@ -852,9 +853,9 @@
 	 a single successor.
 
 	 If we had a conditional branch to the next instruction when
-	 find_basic_blocks was called, then there will only be one
-	 out edge for the block which ended with the conditional
-	 branch (since we do not create duplicate edges).
+	 CFG was built, then there will only be one out edge for the
+	 block which ended with the conditional branch (since we do
+	 not create duplicate edges).
 
 	 Furthermore, the edge will be marked as a fallthru because we
 	 merge the flags for the duplicate edges.  So we do not want to