Comment by contificate

Nice.

I'm always happy to see more accessible resources for compiler writers.

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As an aside: for displaying CFGs on the page, it would be very interesting to emit something somewhat dynamic. SVGs are always a good start, but there is a neat library for doing hierarchical graph layout (dagre, with d3-dagre handling rendering as well). In my own efforts at pedagogy, I've been interested in producing CFGs in-browser whose basic blocks comprise a "unified diff" view of the block (this being achieved in realtime by maintaining a subset of LLVM whose CFGs are persistent). Then it is more obvious what has changed: at least in the case of mem2reg which shouldn't introduce new blocks or move too much around (I forget if it hoists allocas to the entry block or not).

It'd also be cool to distil what underlying ideas you have found to be most useful in your efforts. The constrained scope of them may be useful to me, as I've wanted to create a kind of "advent of compilers" for years (advent of code but with a heavy slant towards compiler tasks/algorithms).