re PR tree-optimization/43801 (error: function causes a section type conflict…

re PR tree-optimization/43801 (error: function causes a section type conflict with -fipa-cp -fipa-cp-clone)

	PR tree-optimization/43801
	* cgraph.c (cgraph_create_virtual_clone): Clear DECL_SECTION_NAME
	if old_decl was DECL_ONE_ONLY.

	* g++.dg/torture/pr43801.C: New test.

From-SVN: r161564

gcc/ChangeLog

 2010-06-29  Jakub Jelinek  <jakub@redhat.com>
 
+	PR tree-optimization/43801
+	* cgraph.c (cgraph_create_virtual_clone): Clear DECL_SECTION_NAME
+	if old_decl was DECL_ONE_ONLY.
+
 	PR debug/44668
 	* dwarf2out.c (add_accessibility_attribute): New function.
 	(gen_subprogram_die, gen_variable_die, gen_field_die): Use it

gcc/cgraph.c

@@ -2217,6 +2217,8 @@ cgraph_create_virtual_clone (struct cgraph_node *old_node,
      ??? We cannot use COMDAT linkage because there is no
      ABI support for this.  */
   DECL_EXTERNAL (new_node->decl) = 0;
+  if (DECL_ONE_ONLY (old_decl))
+    DECL_SECTION_NAME (new_node->decl) = NULL;
   DECL_COMDAT_GROUP (new_node->decl) = 0;
   TREE_PUBLIC (new_node->decl) = 0;
   DECL_COMDAT (new_node->decl) = 0;

gcc/testsuite/ChangeLog

 2010-06-29  Jakub Jelinek  <jakub@redhat.com>
 
+	PR tree-optimization/43801
+	* g++.dg/torture/pr43801.C: New test.
+
 	PR debug/44668
 	* g++.dg/debug/dwarf2/accessibility1.C: New test.
 

gcc/testsuite/g++.dg/torture/pr43801.C

+// PR tree-optimization/43801
+// { dg-do compile }
+// { dg-options "-fipa-cp -fipa-cp-clone" }
+
+struct A
+{
+  virtual void f (int);
+};
+struct B : virtual A
+{
+  virtual void f (int i) { if (i) A::f(0); }
+};
+struct C : virtual B
+{
+  virtual void f (int) { B::f(0); }
+};
+
+void
+foo ()
+{
+  C ();
+}