re PR lto/42653 (ICE with -g and -flto (requires both flags to crash))

2010-04-23  Richard Guenther  <rguenther@suse.de>

	PR lto/42653
	* tree.c (free_lang_data_in_decl): Do not reset DECL_CONTEXT
	of FUNCTION_DECLs.

	* g++.dg/lto/20100423-1_0.C: New testcase.

From-SVN: r158666

gcc/ChangeLog

+2010-04-23  Richard Guenther  <rguenther@suse.de>
+
+	PR lto/42653
+	* tree.c (free_lang_data_in_decl): Do not reset DECL_CONTEXT
+	of FUNCTION_DECLs.
+
 2010-04-22  Laurynas Biveinis  <laurynas.biveinis@gmail.com>
 
 	* sese.h (create_if_region_on_edge): Remove.

gcc/testsuite/ChangeLog

+2010-04-23  Richard Guenther  <rguenther@suse.de>
+
+	PR lto/42653
+	* g++.dg/lto/20100423-1_0.C: New testcase.
+
 2010-04-22  Uros Bizjak  <ubizjak@gmail.com>
 
 	* gcc.dg/graphite/interchange-0.c: Fix dg-final directive.

gcc/testsuite/g++.dg/lto/20100423-1_0.C

+// { dg-lto-do assemble }
+// { dg-lto-options {{-g -flto}} }
+
+namespace llvm
+{
+  class Function;
+  class MachineCodeInfo;
+  class ExecutionEngine
+    {
+    };
+  class JIT : public ExecutionEngine
+  {
+    void runJITOnFunction (Function * F, MachineCodeInfo * MCI = 0);
+  };
+  class JITEventListener
+    {
+    public:
+      JITEventListener ()
+	{
+	}
+      virtual ~JITEventListener ();
+    };
+}
+
+using namespace llvm;
+void
+JIT::runJITOnFunction (Function * F, MachineCodeInfo * MCI)
+{
+  class MCIListener:public JITEventListener
+  {
+    MachineCodeInfo *const MCI;
+  public: 
+    MCIListener (MachineCodeInfo * mci):MCI (mci)
+	 {
+	 }
+  };
+}
+

gcc/tree.c

@@ -4361,7 +4361,8 @@ free_lang_data_in_decl (tree decl)
 
   /* Ignore any intervening types, because we are going to clear their
      TYPE_CONTEXT fields.  */
-  if (TREE_CODE (decl) != FIELD_DECL)
+  if (TREE_CODE (decl) != FIELD_DECL
+      && TREE_CODE (decl) != FUNCTION_DECL)
     DECL_CONTEXT (decl) = decl_function_context (decl);
 
   if (DECL_CONTEXT (decl)