[Google] Recompute function frequency after calculating branch probability

[Dehao Chen]

Hi,

This patch updates the function frequency after calculating branch
probability. This is important because cold function could be promoted
to hot after ipa-inline.

Bootstrapped and passed gcc regression tests.

Okay for google-4_7?

Thanks,
Dehao

--- a/gcc/predict.c
+++ b/gcc/predict.c
@@ -2877,7 +2877,10 @@ rebuild_frequencies (void)
   else if (profile_status == PROFILE_READ)
     {
       if (flag_auto_profile)
-       afdo_calculate_branch_prob ();
+       {
+         afdo_calculate_branch_prob ();
+         compute_function_frequency ();
+       }
       counts_to_freqs ();
     }
   else