From: hubicka <hubicka@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Sat, 15 Dec 2018 21:04:29 +0000 (+0000)
Subject: 	* ipa-utils.c (ipa_merge_profiles): Do no merging when source function
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=e94feafd3e63eecb6d7dc9df0b5b3da2a8927a49;p=thirdparty%2Fgcc.git

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


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@267174 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index f829e93cd499..fd92845039ef 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 9985721f7da7..3345f9dee9fb 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 ()