From 11cf02a799132c886c3649fde10a78e5796bd961 Mon Sep 17 00:00:00 2001
From: marxin <marxin@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Fri, 3 Mar 2017 11:58:03 +0000
Subject: [PATCH 06/19] Backport r245870

gcc/ChangeLog:

2017-03-03  Jan Hubicka  <jh@suse.cz>

	PR lto/79760
	* ipa-devirt.c (maybe_record_node): Properly handle
	__cxa_pure_virtual visibility.
---
 gcc/ipa-devirt.c | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/gcc/ipa-devirt.c b/gcc/ipa-devirt.c
index 2cf018bdf39..981fabf6dc6 100644
--- a/gcc/ipa-devirt.c
+++ b/gcc/ipa-devirt.c
@@ -2462,10 +2462,19 @@ maybe_record_node (vec <cgraph_node *> &nodes,
 	  nodes.safe_push (target_node);
 	}
     }
-  else if (completep
-	   && (!type_in_anonymous_namespace_p
-		 (DECL_CONTEXT (target))
-	       || flag_ltrans))
+  else if (!completep)
+    ;
+  /* We have definition of __cxa_pure_virtual that is not accessible (it is
+     optimized out or partitioned to other unit) so we can not add it.  When
+     not sanitizing, there is nothing to do.
+     Otherwise declare the list incomplete.  */
+  else if (pure_virtual)
+    {
+      if (flag_sanitize & SANITIZE_UNREACHABLE)
+	*completep = false;
+    }
+  else if (flag_ltrans
+	   || !type_in_anonymous_namespace_p (DECL_CONTEXT (target)))
     *completep = false;
 }
 
-- 
2.12.0