From: Jan Hubicka <hubicka@ucw.cz>
Date: Sat, 15 Dec 2018 21:04:29 +0000 (+0100)
Subject: ipa-utils.c (ipa_merge_profiles): Do no merging when source function has zero count.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6263c29d28abb099cb835ca373aa234ef36df6a2;p=gcc.git

ipa-utils.c (ipa_merge_profiles): Do no merging when source function has zero count.


	* ipa-utils.c (ipa_merge_profiles): Do no merging when source function
	has zero count.

From-SVN: r267174
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f829e93cd49..fd92845039e 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2018-12-15  Jan Hubicka  <hubicka@ucw.cz>
+
+	* ipa-utils.c (ipa_merge_profiles): Do no merging when source function
+	has zero count.
+
 2018-12-15  Jakub Jelinek  <jakub@redhat.com>
 
 	PR tree-optimization/88464
diff --git a/gcc/ipa-utils.c b/gcc/ipa-utils.c
index 9985721f7da..3345f9dee9f 100644
--- a/gcc/ipa-utils.c
+++ b/gcc/ipa-utils.c
@@ -402,6 +402,10 @@ ipa_merge_profiles (struct cgraph_node *dst,
   if (src->profile_id && !dst->profile_id)
     dst->profile_id = src->profile_id;
 
+  /* Merging zero profile to dst is no-op.  */
+  if (src->count.ipa () == profile_count::zero ())
+    return;
+
   /* FIXME when we merge in unknown profile, we ought to set counts as
      unsafe.  */
   if (!src->count.initialized_p ()