Use likely upper bound in ivopts

[Jan Hubicka]

Hi,
this patch updates ivopts to use likely upper bounds. Bootstrapped/regtested
x86_64-linux and comitted.  (I will update all the loop passes, but want to do
it one by one so we have performance tracked.)

Honza

        * tree-ssa-loop-ivopts.c (estimated_stmt_executions_int): Use
        likely_max_stmt_executions_int.
Index: tree-ssa-loop-ivopts.c
===================================================================
--- tree-ssa-loop-ivopts.c      (revision 236850)
+++ tree-ssa-loop-ivopts.c      (working copy)
@@ -127,7 +127,7 @@ avg_loop_niter (struct loop *loop)
   HOST_WIDE_INT niter = estimated_stmt_executions_int (loop);
   if (niter == -1)
     {
-      niter = max_stmt_executions_int (loop);
+      niter = likely_max_stmt_executions_int (loop);
       if (niter == -1 || niter > AVG_LOOP_NITER (loop))
        return AVG_LOOP_NITER (loop);
     }