As is probably apparent from the sequence of blog posts about the topic in the last year, I have been thinking about and working on integer optimizations in the JIT compiler a lot. This work was mainly motivated by Pydrofoil, where integer operations matter a lot more than for your typical Python program. In this post I'll describe my most recent change, which is a new small domain specific language that I implemented to specify peephole optimizations on integer operations in the JIT. It uses...
