tal

An implementation of Typed Assembly Language (Morrisett, Walker, Crary, Glew) https://github.com/sweirich/tal

Latest on Hackage:0.1.0.0

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MIT licensed by Stephanie Weirich

An implementation of a type-preserving Compiler, derived from the paper

From System F to Typed Assembly Language by Morrisett, Walker, Crary, Glew

I was inspired to implement this paper while preparing a talk for Papers We Love Philadelphia.

The implementation includes all passes described in the paper:

  • F ==> K (Typed CPS conversion)
  • K ==> C (Polymorphic closure conversion)
  • C ==> H (Hoisting, reuses the C language)
  • H ==> A (Allocation)
  • A ==> TAL (Code generation)

Each language (F, K, C, A, TAL) is defined in the corresponding source file. These implementations include the abstract syntax, small-step operational semantics, and type checker for the languages. The file Util.hs contains definitions common to all implementations.

The compiler itself is in the file Translate.hs. To run the compiler, load this file into ghci and try out one of the sample programs from F.hs.

In particular, you can try

 Translate*> printM $ compile F.sixfact

to see the TAL output for the factorial function applied to six.

If you would like to compile and then run this function you can try:

 Translate*> test F.sixfact
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