From: jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Thu, 11 Jun 2015 17:33:40 +0000 (+0000)
Subject: 	* dwarf2out.c (prune_unused_types): Handle unused top-level limbo
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ff30c40f75966e0948909d1d7cc6cce42273d16d;p=thirdparty%2Fgcc.git

	* dwarf2out.c (prune_unused_types): Handle unused top-level limbo
	dies.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@224391 138bc75d-0d04-0410-961f-82ee72b054a4
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 066d66916803..57900cebcc2b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2015-06-11  Jason Merrill  <jason@redhat.com>
+
+	* dwarf2out.c (prune_unused_types): Handle unused top-level limbo
+	dies.
+
 2015-06-11  Marek Polacek  <polacek@redhat.com>
 
 	* match.pd ((x & y) ^ (x | y)): Don't check for single_use.
diff --git a/gcc/dwarf2out.c b/gcc/dwarf2out.c
index 8a36fe8db355..3a92b02560cd 100644
--- a/gcc/dwarf2out.c
+++ b/gcc/dwarf2out.c
@@ -23789,8 +23789,17 @@ prune_unused_types (void)
   if (skeleton_debug_str_hash)
     skeleton_debug_str_hash->empty ();
   prune_unused_types_prune (comp_unit_die ());
-  for (node = limbo_die_list; node; node = node->next)
-    prune_unused_types_prune (node->die);
+  for (limbo_die_node **pnode = &limbo_die_list; *pnode; )
+    {
+      node = *pnode;
+      if (!node->die->die_mark)
+	*pnode = node->next;
+      else
+	{
+	  prune_unused_types_prune (node->die);
+	  pnode = &node->next;
+	}
+    }
   for (ctnode = comdat_type_list; ctnode; ctnode = ctnode->next)
     prune_unused_types_prune (ctnode->root_die);