re PR lto/44950 (ICE in dwarf2out_finish, at dwarf2out.c:22271)

2010-10-18  Richard Guenther  <rguenther@suse.de>

	PR lto/44950
	* tree.c (free_lang_data_in_decl): As we clear TYPE_METHODS
	also clear references to entries of it.

	* g++.dg/lto/20101015-2_0.C: New testcase.

From-SVN: r165629

gcc/ChangeLog

+2010-10-18  Richard Guenther  <rguenther@suse.de>
+
+	PR lto/44950
+	* tree.c (free_lang_data_in_decl): As we clear TYPE_METHODS
+	also clear references to entries of it.
+
 2010-10-18  Andi Kleen  <ak@linux.intel.com>
 
 	PR other/43448

gcc/testsuite/ChangeLog

+2010-10-18  Richard Guenther  <rguenther@suse.de>
+
+	PR lto/44950
+	* g++.dg/lto/20101015-2_0.C: New testcase.
+
 2010-10-18  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/46019

gcc/testsuite/g++.dg/lto/20101015-2_0.C

+// { dg-lto-do link }
+// { dg-lto-options { { -flto } { -g -flto } } }
+// { dg-extra-ld-options "-r -nostdlib" }
+
+struct Base { ~Base (); };
+void fun(void) { struct Deriv : Base { } x; }

gcc/tree.c

@@ -4510,6 +4510,15 @@ free_lang_data_in_decl (tree decl)
       /* DECL_SAVED_TREE holds the GENERIC representation for DECL.
 	 At this point, it is not needed anymore.  */
       DECL_SAVED_TREE (decl) = NULL_TREE;
+
+      /* Clear the abstract origin if it refers to a method.  Otherwise
+         dwarf2out.c will ICE as we clear TYPE_METHODS and thus the
+	 origin will not be output correctly.  */
+      if (DECL_ABSTRACT_ORIGIN (decl)
+	  && DECL_CONTEXT (DECL_ABSTRACT_ORIGIN (decl))
+	  && RECORD_OR_UNION_TYPE_P
+	       (DECL_CONTEXT (DECL_ABSTRACT_ORIGIN (decl))))
+	DECL_ABSTRACT_ORIGIN (decl) = NULL_TREE;
     }
   else if (TREE_CODE (decl) == VAR_DECL)
     {