b9fdb503c1
Really, `raco demod` is adapted here to work with any linklet-based VM by compiling modules to machine-independent form, which is essentially a wrapper around linklet S-expressions. The BC-specific implementation remains in place, and it has the advantage of being able to work with existing module compilations, while the implementation based on machine-independent form must recompile all modules before attempting to combine them (but that recompilation is easily cached). Use `--work <dir>` to use `<dir>` as a cache for multiple demodularizations. Getting `raco demod` to work involved several incidental improvements: * make `racket/linklet` work with machine-independent forms; * add `linklet-body-reserved-symbol?`; * fix schemify for linklets that have unexported definitions (which the expander never generates, but the demodularizer does); * add `current-multi-compile-any` to expose CM's multi-target compilation mode programmatically; and * repair a bug in CS JIT mode. The demodularizer could be a lot smarter to prune demodularized code before sending it off to the compiler. Of course, the compiler should be able to figure out improvements itself, but sending a smaller chunk of code to the compiler can avoid the hybrid interpreter--compiler mode that is used for large linklets and that prevents optimizers like cp0 from doing much to prune definitions. The demodularizer has a lot in common with the expander's flattener that is used for bootstrapping, and a smarter demodularizer would have even more in common. It would be nice to have one implementation instead of two. |
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