If you're interested in how this could be automated, check out Polly[1]. There is also similar framework in GCC[2], but as can be seen from the blog post, there

If you're interested in how this could be automated, check out Polly[1]. There is also similar framework in GCC[2], but as can be seen from the blog post, there is room for improvement. [1] http://polly.llvm.org http://polly.llvm.org [2] http://gcc.gnu.org/wiki/Graphite http://gcc.gnu.org/wiki/Graphite