[PATCH] decide edge's hotness when there is profile info

[Dehao Chen]

This patch forces to use profile info to check if an edge is hot when
profile is available.

Bootstrapped and passed regression tests.

OK for trunk?

Thanks,
Dehao

gcc/ChangeLog:
2013-10-14  Dehao Chen  <de...@google.com>
* predict.c(cgraph_maybe_hot_edge_p): Decide edge's hotness from profile.

Index: gcc/predict.c
===================================================================
--- gcc/predict.c (revision 203568)
+++ gcc/predict.c (working copy)
@@ -185,10 +185,8 @@ maybe_hot_bb_p (struct function *fun, const_basic_
 bool
 cgraph_maybe_hot_edge_p (struct cgraph_edge *edge)
 {
-  if (profile_info && flag_branch_probabilities
-      && !maybe_hot_count_p (NULL,
-                             edge->count))
-    return false;
+  if (profile_info && flag_branch_probabilities)
+    return maybe_hot_count_p (NULL, edge->count);
   if (edge->caller->frequency == NODE_FREQUENCY_UNLIKELY_EXECUTED
       || (edge->callee
   && edge->callee->frequency == NODE_FREQUENCY_UNLIKELY_EXECUTED))