Added rough set of notes

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Justin Ethier 2015-07-31 19:29:05 -04:00
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- [References](#References)
## TODO
All of the references listed below were used to some extent to write Cyclone.
mention husk-scheme
## Scheme source-to-source transformations
One of the most important inspiration's for Cyclone was Marc Feeley's [The 90 minute Scheme to C compiler]() which includes a presentation, set of slides, and example code written in Gambit Scheme. Feeley includes an overview of how to compile Scheme to C code using source-to-source transformations, including closure and continuation-passing-style CPS conversions. The 90-minute scc ultimately compiles the code down to a single function and uses jumps to support continuations. This is a bit too limiting for a production compiler, so that part was not used.
## C Runtime
Henry Baker's paper [CONS Should Not CONS Its Arguments: Cheney on the M.T.A.](http://www.pipeline.com/~hbaker1/CheneyMTA.html) was used as the target runtime as it provides a reasonably fast approach that includes all of the fundamental requirements for a Scheme runtime: tail calls, garbage collection, and continuations.
TODO: explain brief overview of how it works, include some comments from him, explain coding style implications, etc
also mention value types from lisp in small pieces
also mention CHICKEN, a production-quality compiler that uses Baker's approach.
## Scheme standards
r7rs - library (C module) support is the most important, but also exceptions, improvements from r5rs, etc.
## Interpreter
used meta-circular interpreter from SICP as a starting point
## Macros
Chibi scheme explicit renaming macros provide an efficient place to start
## future
should consider optimizations from Andrew Appel's book compiling with continuations. he developed a similar compiler for Standard ML of New Jersey, which is referenced by Baker's paper.
## Conclusion
From Feeley's presentation:
> Performance is not so bad with NO optimizations (about 6 times slower than Gambit-C with full optimization)
TODO: include simple, rough measurements of compile time Cyclone vs CHICKEN (most similar compiler)
## References
- [CONS Should Not CONS Its Arguments, Part II: Cheney on the M.T.A.](http://www.pipeline.com/~hbaker1/CheneyMTA.html), by Henry Baker