Looks like cool stuff. Am I right this language compiles to GPU code? I'm thinking of a similar project myself and I'm curious what consideration besides loo

Looks like cool stuff. Am I right this language compiles to GPU code? I'm thinking of a similar project myself and I'm curious what consideration besides loop vectorization goes into such stuff, especially, what about caches and access issues (OK, I ask the same question for any project like this)? Also, isn't one factor in sparse representations that if you aren't careful, the data becomes un-sparse and slows down a lot?