Index: gcc/function.c
===================================================================
--- gcc/function.c	(revision 107249)
+++ gcc/function.c	(working copy)
@@ -1711,8 +1711,11 @@ aggregate_value_p (tree exp, tree fntype
 {
   int i, regno, nregs;
   rtx reg;
+  tree type;
 
-  tree type = (TYPE_P (exp)) ? exp : TREE_TYPE (exp);
+  gcc_assert (exp != NULL_TREE);
+
+  type = (TYPE_P (exp)) ? exp : TREE_TYPE (exp);
 
   if (fntype)
     switch (TREE_CODE (fntype))
@@ -3805,6 +3808,7 @@ allocate_struct_function (tree fndecl)
   cfun->decl = fndecl;
 
   result = DECL_RESULT (fndecl);
+  gcc_assert (result != NULL_TREE);
   if (aggregate_value_p (result, fndecl))
     {
 #ifdef PCC_STATIC_STRUCT_RETURN