--- gcc-3.4.6/gcc/function.c	2013-05-19 20:08:05.000000000 +0200
+++ gcc/function.c	2013-05-19 20:23:32.000000000 +0200
@@ -8153,3 +8153,28 @@
 }
 
 #include "gt-function.h"
+
+/* begin-GG-local: explicit register specification for parameters */
+/* Return 1 if an argument for the current function was passed in
+   register REGNO.  */
+
+int
+function_arg_regno_p (int regno)
+{
+  tree parm = DECL_ARGUMENTS (current_function_decl);
+  for (; parm; parm = TREE_CHAIN (parm))
+    {
+      rtx incoming = DECL_INCOMING_RTL (parm);
+      if (GET_CODE (incoming) == REG)
+	{
+	  int incoming_reg;
+	  incoming_reg = REGNO (incoming);
+	  if (regno >= incoming_reg &&
+	      regno < incoming_reg + HARD_REGNO_NREGS (incoming_reg,
+						       GET_MODE (incoming)))
+	    return 1;
+	}
+    }
+  return 0;
+}
+/* end-GG-local */