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diff --git a/gcc/gencodes.c b/gcc/gencodes.c
index 0611eeca..5a6014cb 100644
--- a/gcc/gencodes.c
+++ b/gcc/gencodes.c
@@ -1,14 +1,14 @@
 /* Generate from machine description:
    - some macros CODE_FOR_... giving the insn_code_number value
    for each of the defined standard insn names.
-   Copyright (C) 1987, 1991, 1995, 1998,
-   1999, 2000, 2001 Free Software Foundation, Inc.
+   Copyright (C) 1987, 1991, 1995, 1998, 1999, 2000, 2001, 2003,
+   2004, 2007  Free Software Foundation, Inc.
 
 This file is part of GCC.
 
 GCC is free software; you can redistribute it and/or modify it under
 the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
 version.
 
 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
@@ -17,44 +17,46 @@ FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 for more details.
 
 You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING.  If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA.  */
+along with GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
 
 
-#include "hconfig.h"
+#include "bconfig.h"
 #include "system.h"
+#include "coretypes.h"
+#include "tm.h"
 #include "rtl.h"
 #include "errors.h"
 #include "gensupport.h"
 
-static void gen_insn PARAMS ((const char *, int));
-
 static void
-gen_insn (name, code)
-     const char *name;
-     int code;
+gen_insn (rtx insn, int code)
 {
+  const char *name = XSTR (insn, 0);
+  int truth = maybe_eval_c_test (XSTR (insn, 2));
+
   /* Don't mention instructions whose names are the null string
      or begin with '*'.  They are in the machine description just
      to be recognized.  */
   if (name[0] != 0 && name[0] != '*')
-    printf ("  CODE_FOR_%s = %d,\n", name, code);
+    {
+      if (truth == 0)
+	printf ("#define CODE_FOR_%s CODE_FOR_nothing\n", name);
+      else
+	printf ("  CODE_FOR_%s = %d,\n", name, code);
+    }
 }
 
-extern int main PARAMS ((int, char **));
-
 int
-main (argc, argv)
-     int argc;
-     char **argv;
+main (int argc, char **argv)
 {
   rtx desc;
 
   progname = "gencodes";
 
-  if (argc <= 1)
-    fatal ("no input file name");
+  /* We need to see all the possibilities.  Elided insns may have
+     direct references to CODE_FOR_xxx in C code.  */
+  insn_elision = 0;
 
   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
     return (FATAL_EXIT_CODE);
@@ -80,10 +82,10 @@ enum insn_code {");
 	break;
 
       if (GET_CODE (desc) == DEFINE_INSN || GET_CODE (desc) == DEFINE_EXPAND)
-	gen_insn (XSTR (desc, 0), insn_code_number);
+	gen_insn (desc, insn_code_number);
     }
 
-  puts ("CODE_FOR_nothing\n\
+  puts ("  CODE_FOR_nothing\n\
 };\n\
 \n\
 #endif /* GCC_INSN_CODES_H */");
@@ -93,12 +95,3 @@ enum insn_code {");
 
   return SUCCESS_EXIT_CODE;
 }
-
-/* Define this so we can link with print-rtl.o to get debug_rtx function.  */
-
-const char *
-get_insn_name (code)
-     int code ATTRIBUTE_UNUSED;
-{
-  return NULL;
-}