1 / 16

Honors Compilers

This project involves writing a compiler for a subset of Algol-68 to target MMIX architecture. The compiler will be written in its own language and should be bootstrapped, meaning it can compile itself.

molson
Download Presentation

Honors Compilers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Honors Compilers The Course Project Feb 28th 2002

  2. The Goal • Write a compiler for a subset of Algol-68 • The compiler to be written in its own language (i.e. in the chosen subset) • Targetted to MMIX • Bootstrapped (Compiler can compile itself)

  3. The Language to be Compiled • A subset of Algol-68 (roughly Algol-68S) • You get to choose the exact subset • Required elements • int, bool, char primitive modes • ref, [], struct, proc modes • Normal declaration and statement forms • Including if/endif and do/od loops • All ordinary expression forms • Compile a single procedure (acts as main)

  4. Optional Language Elements • 1-d arrays required, 2-d etc optional • Union modes optional • Floating-point processing optional • Garbage collection optional • Case/esac optional • Implement separately compiled modules • Good error messages

  5. Optimization • Aim for a reasonable level of code quality • At least minimal register allocation • Preferably attempt at least some global optimization

  6. Input/Output • You must be able to read and write files (treated as a sequence of char) • Exact provision of facilities is up to you

  7. Lexical Structure • Standard Algol-68 lexical elements • Use upper case for bold, lower case for non-bold. • Lexical structure to be defined by your second assignment.

  8. Third assignment • Due right after the break • Exact description of subset you will implement • Indicate possible optional additions • Provide BNF of language grammar

  9. Fourth Assignment • Take grammar you devised for your subset. • Modify grammar to be acceptable as bison input, and use output bison to parse a small program.

  10. Fifth Assignment • Provide complete design document for compiler • Exact details of what is to be implemented • Internal data structures • Format of intermediate files • Details of algorithms used

  11. Implementation Language • To be implemented in its own language • Final version must be able to compile itself • So you define the implementation language as well as the language to be compiled.

  12. The Target Language • Generate MMIX assembly language • To be assembled and run on MMIX assembler

  13. Compiler Organization • Organize compiler as set of separate programs, e.g. parser, semantic analyzer, optimizer, code generator. • Programs communicate by means of files • Carefully define format of these files

  14. Bootstrapping • Some different methods • Write crude translator from Algol-68 subset to C (e.g. PERL script) • Write crude translator from C to Algol-68 • Write in Algol-68 and use some existing A68 compiler or translator

  15. What to Hand In • Commented source code • Set of sample programs used to test compiler, with output from MMIX run, and MMIX assembly language. • Standard class bench mark (to be supplied later) run on instrumented MMIX simulator.

  16. Due Date • Last Day of the Exam Period • Extensions possible • But not if you want to use grade to avoid exam!

More Related