re PR target/31628 (stdcall function is miscompiled)

        PR target/31628
        * config/i386/i386.c (type_has_variadic_args_p): Look for any
        TREE_LIST with a void_type_node value, not void_list_node exactly.

From-SVN: r124014

gcc/ChangeLog

+2007-04-20  Richard Henderson  <rth@redhat.com>
+
+	PR target/31628
+	* config/i386/i386.c (type_has_variadic_args_p): Look for any
+	TREE_LIST with a void_type_node value, not void_list_node exactly.
+
 2007-04-21  Douglas Gregor  <doug.gregor@gmail.com>
 
 	* doc/standards.texi: Re-arrange into language-specific

gcc/config/i386/i386.c

@@ -2895,12 +2895,15 @@ ix86_eax_live_at_start_p (void)
 static bool
 type_has_variadic_args_p (tree type)
 {
-  tree t;
+  tree n, t = TYPE_ARG_TYPES (type);
 
-  for (t = TYPE_ARG_TYPES (type); t; t = TREE_CHAIN (t))
-    if (t == void_list_node)
+  if (t == NULL)
     return false;
-  return true;
+
+  while ((n = TREE_CHAIN (t)) != NULL)
+    t = n;
+
+  return TREE_VALUE (t) != void_type_node;
 }
 
 /* Value is the number of bytes of arguments automatically