diff --git a/ghc-core.el b/ghc-core.el
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+;;; ghc-core.el --- Syntax highlighting module for GHC Core
+
+;; Copyright (C) 2010  Johan Tibell
+
+;; Author: Johan Tibell <johan.tibell@gmail.com>
+
+;; This file 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 3, or (at your option)
+;; any later version.
+
+;; This file is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or 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 GNU Emacs; see the file COPYING.  If not, write to
+;; the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+;; Boston, MA 02110-1301, USA.
+
+;;; Commentary:
+
+;; Purpose:
+;;
+;; To make it easier to read GHC Core output by providing highlighting
+;; and removal of commonly ignored annotations.
+
+;;; Code:
+
+(require 'haskell-mode)
+(require 'haskell-font-lock)
+
+(defun ghc-core-clean-region (start end)
+  "Remove commonly ignored annotations and namespace
+prefixes in the given region."
+  (interactive "r")
+  (save-restriction 
+    (narrow-to-region start end)
+    (goto-char (point-min))
+    (while (search-forward-regexp "GHC\.[^\.]*\." nil t)
+      (replace-match "" nil t))
+    (goto-char (point-min))
+    (while (flush-lines "^ *GblId *$" nil))
+    (goto-char (point-min))
+    (while (flush-lines "^ *LclId *$" nil))
+    (goto-char (point-min))
+    (while (flush-lines (concat "^ *\\[\\(?:Arity [0-9]+\\|NoCafRefs\\|"
+                                "Str: DmdType\\|Worker \\)"
+                                "\\([^]]*\\n?\\).*\\] *$") nil))
+    (goto-char (point-min))
+    (while (search-forward "Main." nil t) (replace-match "" nil t))))
+
+(defun ghc-core-clean-buffer ()
+  "Remove commonly ignored annotations and namespace
+prefixes in the current buffer."
+  (interactive)
+  (ghc-core-clean-region (point-min) (point-max)))
+
+;;;###autoload
+(defun ghc-core-create-core ()
+  "Compiled and load the current buffer as tidy core"
+  (interactive)
+  (save-buffer)
+  (let ((core-buffer (generate-new-buffer "ghc-core"))
+        (neh (lambda () (kill-buffer core-buffer))))
+    (add-hook 'next-error-hook neh)
+    (call-process "ghc" nil core-buffer nil "-c" "-ddump-simpl" "-O2" (buffer-file-name))
+    (display-buffer core-buffer)
+    (with-current-buffer core-buffer
+      (ghc-core-mode))
+    (remove-hook 'next-error-hook neh)))
+
+;;;###autoload
+(add-to-list 'auto-mode-alist '("\\.hcr\\'" . ghc-core-mode))
+
+;;;###autoload
+(define-derived-mode ghc-core-mode haskell-mode "GHC-Core"
+  "Major mode for GHC Core files.")
+
+(provide 'ghc-core)
+;;; ghc-core.el ends here