Add function part to a same comdat group (PR ipa/80212).

2017-04-11  Martin Liska  <mliska@suse.cz>

	PR ipa/80212
	* cgraph.c (cgraph_node::dump): Dump calls_comdat_local.
	* ipa-split.c (split_function): Create a local comdat symbol
	if caller is in a comdat group.
2017-04-11  Martin Liska  <mliska@suse.cz>

	PR ipa/80212
	* g++.dg/ipa/pr80212.C: New test.

From-SVN: r246848

gcc/ChangeLog

 2017-04-11  Martin Liska  <mliska@suse.cz>
 
 	PR ipa/80212
+	* cgraph.c (cgraph_node::dump): Dump calls_comdat_local.
+	* ipa-split.c (split_function): Create a local comdat symbol
+	if caller is in a comdat group.
+
+2017-04-11  Martin Liska  <mliska@suse.cz>
+
+	PR ipa/80212
 	* ipa-cp.c (determine_versionability): Handle calls_comdat_local
 	flags.
 

gcc/cgraph.c

@@ -2123,6 +2123,8 @@ cgraph_node::dump (FILE *f)
     fprintf (f, " only_called_at_exit");
   if (tm_clone)
     fprintf (f, " tm_clone");
+  if (calls_comdat_local)
+    fprintf (f, " calls_comdat_local");
   if (icf_merged)
     fprintf (f, " icf_merged");
   if (merged_comdat)

gcc/ipa-split.c

@@ -1360,6 +1360,15 @@ split_function (basic_block return_bb, struct split_point *split_point,
 
   node->split_part = true;
 
+  if (cur_node->same_comdat_group)
+    {
+      /* TODO: call is versionable if we make sure that all
+	 callers are inside of a comdat group.  */
+      cur_node->calls_comdat_local = 1;
+      node->add_to_same_comdat_group (cur_node);
+    }
+
+
   /* Let's take a time profile for splitted function.  */
   node->tp_first_run = cur_node->tp_first_run + 1;
 

gcc/testsuite/ChangeLog

+2017-04-11  Martin Liska  <mliska@suse.cz>
+
+	PR ipa/80212
+	* g++.dg/ipa/pr80212.C: New test.
+
 2017-04-11  Martin Sebor  <msebor@redhat.com>
 
 	PR middle-end/80364

gcc/testsuite/g++.dg/ipa/pr80212.C

+// PR ipa/80212
+// { dg-options "-O2 --param partial-inlining-entry-probability=403796683 -fno-early-inlining" }
+
+struct b
+{
+  virtual b *c () const;
+};
+struct d : virtual b
+{
+};
+struct e : d
+{
+  e *
+  c () const
+  {
+  }
+};
+main () { e a; }