This plugin gives an example of defining a compiler plugin for GHC. The implementation of this optimization is ripped directly from GHC itself.
travis-ci.org results:
Install the latest version of the plugin from Hackage (requires GHC 7.4.1):
$ cabal install cse-ghc-plugin
File bugs in the GitHub issue tracker.
Master git repository:
git clone https://github.com/thoughtpolice/cse-ghc-plugin.git
There's also a BitBucket mirror:
git clone https://bitbucket.org/thoughtpolice/cse-ghc-plugin.git
See AUTHORS.txt.
BSD3. See LICENSE.txt
for terms of copyright and redistribution.