Fix profile updating in ipa-cp and fixup_cfg

[Jan Hubicka <hubicka at ucw dot cz>]

Hi,
this patch makes ipa-cp to not drop profile to 0 when clonning across
all active apths and tree-cfg to do same profile updating as tree-inline.

I will factor out the common code as a followup.

Bootstrapped/regtested x86_64-linux.
	* ipa-cp.c (update_profiling_info): Handle conversion to local
	profile.
	* tree-cfg.c (execute_fixup_cfg): Do fixup same way as inliner does.
Index: ipa-cp.c
===================================================================
--- ipa-cp.c	(revision 254884)
+++ ipa-cp.c	(working copy)
@@ -3695,16 +3695,22 @@ update_profiling_info (struct cgraph_nod
 	}
     }
 
-  new_node->count = new_sum;
-  remainder = orig_node_count - new_sum;
+  if (!new_sum.nonzero_p ())
+    {
+      new_sum = new_sum.global0 ();
+      new_node->count = new_sum;
+      remainder = orig_node->count;
+    }
+  else
+    {
+      remainder = orig_node_count - new_sum;
+      if (!remainder.nonzero_p ())
+	remainder = orig_node_count.global0 ();
+    }
   orig_node->count = remainder;
 
   for (cs = new_node->callees; cs; cs = cs->next_callee)
-    /* FIXME: why we care about non-zero frequency here?  */
-    if (cs->frequency ())
-      cs->count = cs->count.apply_scale (new_sum, orig_node_count);
-    else
-      cs->count = profile_count::zero ();
+    cs->count = cs->count.apply_scale (new_sum, orig_node_count);
 
   for (cs = orig_node->callees; cs; cs = cs->next_callee)
     cs->count = cs->count.apply_scale (remainder, orig_node_count);
Index: tree-cfg.c
===================================================================
--- tree-cfg.c	(revision 254884)
+++ tree-cfg.c	(working copy)
@@ -9227,14 +9227,13 @@ execute_fixup_cfg (void)
   gimple_stmt_iterator gsi;
   int todo = 0;
   cgraph_node *node = cgraph_node::get (current_function_decl);
-  profile_count num = node->count.ipa ();
+  profile_count num = node->count;
   profile_count den = ENTRY_BLOCK_PTR_FOR_FN (cfun)->count;
-  bool scale = num.initialized_p () && den.ipa_p ()
-	       && (den.nonzero_p () || num == profile_count::zero ())
-	       && !(num == den.ipa ());
+  bool scale = num.initialized_p () && !(num == den);
 
   if (scale)
     {
+      profile_count::adjust_for_ipa_scaling (&num, &den);
       ENTRY_BLOCK_PTR_FOR_FN (cfun)->count = node->count;
       EXIT_BLOCK_PTR_FOR_FN (cfun)->count
         = EXIT_BLOCK_PTR_FOR_FN (cfun)->count.apply_scale (num, den);
@@ -9243,15 +9242,7 @@ execute_fixup_cfg (void)
   FOR_EACH_BB_FN (bb, cfun)
     {
       if (scale)
-	{
-	  if (num == profile_count::zero ())
-	    {
-	      if (!(bb->count == profile_count::zero ()))
-	        bb->count = bb->count.global0 ();
-	    }
-	  else
-            bb->count = bb->count.apply_scale (num, den);
-	}
+        bb->count = bb->count.apply_scale (num, den);
       for (gsi = gsi_start_bb (bb); !gsi_end_p (gsi);)
 	{
 	  gimple *stmt = gsi_stmt (gsi);