re PR debug/42425 (ICE declaring local class)

2010-04-26  Richard Guenther  <rguenther@suse.de>

	PR lto/42425
	* tree.c (free_lang_data_in_type): Do not free TYPE_CONTEXT
	if emitting debug information and it is either a function
	or a namespace decl.

	* g++.dg/lto/20100423-2_0.C: New testcase.

From-SVN: r158722

gcc/ChangeLog

+2010-04-26  Richard Guenther  <rguenther@suse.de>
+
+	PR lto/42425
+	* tree.c (free_lang_data_in_type): Do not free TYPE_CONTEXT
+	if emitting debug information and it is either a function
+	or a namespace decl.
+
 2010-04-26  Ira Rosen  <irar@il.ibm.com>
 
 	* tree-vectorizer.h (struct _stmt_vec_info): Add new field to 

gcc/testsuite/ChangeLog

+2010-04-26  Richard Guenther  <rguenther@suse.de>
+
+	PR lto/42425
+	* g++.dg/lto/20100423-2_0.C: New testcase.
+
 2010-04-26  Ira Rosen  <irar@il.ibm.com>
 
 	* gcc.dg/vect/bb-slp-23.c: New test.

gcc/testsuite/g++.dg/lto/20100423-2_0.C

+// { dg-lto-do assemble }
+// { dg-lto-options {{-flto -g}} }
+
+struct A
+{
+  virtual ~A();
+};
+
+void foo()
+{
+  struct B : A {};
+  B b;
+}
+

gcc/tree.c

@@ -4258,7 +4258,12 @@ free_lang_data_in_type (tree type)
       TYPE_LANG_SLOT_1 (type) = NULL_TREE;
     }
 
-  TYPE_CONTEXT (type) = NULL_TREE;
+  if (debug_info_level < DINFO_LEVEL_TERSE
+      || (TYPE_CONTEXT (type)
+	  && TREE_CODE (TYPE_CONTEXT (type)) != FUNCTION_DECL
+	  && TREE_CODE (TYPE_CONTEXT (type)) != NAMESPACE_DECL))
+    TYPE_CONTEXT (type) = NULL_TREE;
+
   if (debug_info_level < DINFO_LEVEL_TERSE)
     TYPE_STUB_DECL (type) = NULL_TREE;
 }