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COMP 520 Winter 2020 Introduction (1) Introduction COMP 520: Compiler Design (4 credits) Alexander Krolik alexander.krolik@mail.mcgill.ca MWF 10:30-11:30, TR 1100 http://www.cs.mcgill.ca/~cs520/2020/ COMP 520 Winter 2020 Introduction (2)

  1. COMP 520 Winter 2020 Introduction (1) Introduction COMP 520: Compiler Design (4 credits) Alexander Krolik alexander.krolik@mail.mcgill.ca MWF 10:30-11:30, TR 1100 http://www.cs.mcgill.ca/~cs520/2020/

  2. COMP 520 Winter 2020 Introduction (2) I’m Alex! • Current PhD student in compilers; • Undergrad & masters at McGill in computer science; • Part of McGill’s compiler research lab since 2014; – Speculative multithreading – Dependence analysis – GPU compilers • Originally took COMP 520 in Winter 2015; • Taught COMP 520 since 2017; and • Not a morning person; but definitely a winter person.

  3. COMP 520 Winter 2020 Introduction (3) GPU Compiler Research A very different target architecture ... SP SP SFU ... SM Core Core Shared Register PCI-e Memory Page Host Memory Device Memory How do we write efficient parallel programs for the GPU? Furthermore, how do we translate single-threaded CPU programs to GPU programs? My research : JIT compilation of SQL queries for GPUs

  4. COMP 520 Winter 2020 Introduction (4) Compiler Research at McGill (McLAB) Current Projects • Dynamic GPU compilation and optimization (r3d3) • Array language optimization for SQL queries (HorseIR) • Sparse matrix operations (SpMV fait maison) • JavaScript and WebAssembly Past Work • MATLAB analysis frameworks (McSAF , Tamer) • MATLAB static compilers (Mc2For, MiX10, Matjuice) • JIT compilation (McVM, Velociraptor) • Programing languages and tools (AspectMATLAB)

  5. COMP 520 Winter 2020 Introduction (5) In Memory of Professor Laurie Hendren

  6. COMP 520 Winter 2020 Introduction (6) Introduction Course Outline Compilers Overview Bootstrapping

  7. COMP 520 Winter 2020 Introduction (7) What is this class? Purpose This course is an introduction to the full pipeline of modern compilers • It covers all aspects of the compiler pipeline for modern languages (C, Python, etc.); • Explores its application to both general-purpose and domain-specific languages; and • Discusses virtual machines and runtime environments. End Goal By the end of this class you will have a working knowledge of compilers that allows you to • Effectively use compiler tools for general-purpose and domain-specific projects; and • Produce fully functional compilers for general-purpose languages.

  8. COMP 520 Winter 2020 Introduction (8) Contents Topics covered in class • Deterministic parsing: Scanners, LL/LR parsers, flex / bison tools • Semantic analysis: Abstract syntax trees, symbol tables, type checking • Virtual machines and run-time environments: JVM (stack machines), virtual register machines, garbage collection • Code generation: Resources, templates, optimizations • Special topics: GPUs, Rust/modern languages

  9. COMP 520 Winter 2020 Introduction (9) Class Information Schedule • Lectures: 3 hours/week (MWF 10:30-11:30) Prerequisites • COMP 273, COMP 302, (COMP 330), ability to read and write “large” programs • Students without COMP 330 should read the background material available at: http://www.cl.cam.ac.uk/teaching/2003/RLFA/notes.pdf Lecturer • Alexander Krolik, McConnell 234 Office Hours: Monday 5:00-6:00, Wednesday 11:30-12:30 TAs • Adrian Koretski ( adrian.koretski@mail.mcgill.ca ) McConnell 235 Office Hours: Tuesday/Thursday 14:45-15:45 • Jason Pizzuco ( jason.pizzuco@mail.mcgill.ca ) McConnell 234 Office Hours: Friday 12:00-13:00 If you have class at these times, send one of us an email to arrange another meeting time.

  10. COMP 520 Winter 2020 Introduction (10) Marking Scheme (Outdated, see next slide) Assignments • 10% for individual assignments (2 x 5%) • 10% for the JOOS peephole optimizer (group) GoLite Project • 35% for content submitted at milestones (group) • 10% for the final compiler and report (group) • Group members may be given different grades if the contributions are not reasonably equal Midterm: 10% midterm (before reading week) Final exam: 25% final exam (during exam period) • A 25% supplemental exam is offered Assignments and project milestones are due at midnight of the due date. A penalty of 10% per day late is given. Assignments will not be accepted after solutions have been circulated.

  11. COMP 520 Winter 2020 Introduction (11) Marking Scheme (New) Assignments • 10% for individual assignments (2 x 5%) • 15% for the JOOS peephole optimizer (group) GoLite Project • 30% for content submitted at milestones (group) • 25% for the final compiler and report (group) • Group members may be given different grades if the contributions are not reasonably equal Midterm: 20% midterm (before reading week) Final exam: Cancelled Assignments and project milestones are due at midnight of the due date. A penalty of 10% per day late is given. Assignments will not be accepted after solutions have been circulated.

  12. COMP 520 Winter 2020 Introduction (12) Academic Integrity • McGill University values academic integrity. Therefore all students must understand the meaning and consequences of cheating, plagiarism and other academic offences under the Code of Student Conduct and Disciplinary Procedures. https://www.mcgill.ca/students/srr/honest/ • In terms of this course, your responsibility is to ensure that all work is correctly attributed. Code without attribution must be entirely your own work. • If you use some third-party code you must have permission to use it and you must clearly indicate the source. • You may not use previous years’ solutions or grading material. • An honesty statement must be included with all assignment/project submissions. Other Required McGill Statements • In accord with McGill University’s Charter of Students’ Rights, students in this course have the right to submit in English or in French any written work that is to be graded.

  13. COMP 520 Winter 2020 Introduction (13) Course Material Textbook and online readings • Recommended Textbook, Crafting a Compiler by Fischer, Cytron and LeBlanc, available in hardcopy at the McGill Bookstore or www.amazon.ca . You can find a support web site with additional tutorial and reference information at http://www.cs.wustl.edu/~cytron/cacweb/ . There should be a copy on reserve in the library, and you may find other sources for the book. • Alternate Textbook, Modern compiler implementation in Java (2nd edition) by Appel and Palsberg. Free online version available via McGill Library (access via a McGill IP or VPN), http://mcgill.worldcat.org/title/modern-compiler-implementation-in-java/oclc/ 56796736 . • Optional but recommended background readings; and • Required for additional exercises.

  14. COMP 520 Winter 2020 Introduction (14) Course Material Slides • Detailed (and hopefully complete) explanation of the course contents; and • Available via the web site, either just before or after the lecture. Course website • http://www.cs.mcgill.ca/~cs520/2020/ • Contains links to examples, documentation and readings; and • Updated frequently with slides, due dates, and assignment specifications. Facebook group • https://www.facebook.com/groups/COMP520W2020/

  15. COMP 520 Winter 2020 Introduction (15) Course Material GitHub organization • https://github.com/comp520 • Contains examples for scanning and parsing, and assignment starter code. JOOS language and compiler • Java’s Object-Oriented Subset • Is compiled to Java bytecode; • Illustrates a fully fledged general purpose language; • Is used to teach by example and will be useful for your assignments and project; and • Has source code available on GitHub;

  16. COMP 520 Winter 2020 Introduction (16) GoLite Project Go Language • https://golang.org • Created by Rob Pike, Ken Thompson and Robert Griesemer • Google employees • Not a Google project like Gmail; open source • Initial release in 2009 • 1.0 release in 2012 Motivation • Simplify development • Built-in concurrency support • Faster compilation “Go is an open source programming language that makes it easy to build simple, reliable and efficient software." – golang.org

  17. COMP 520 Winter 2020 Introduction (17) GoLite Project Goal • Design a complete compiler for a significant, non-trivial subset of Go • Learn a compiler toolkit (C tools shown in class) • Produce any kind of output code, high-level code [C, JavaScript, Python, ...], or low-level code [assembly, LLVM, Java bytecode, ...] • Fun stuffed Gophers! GitHub and Groups • The project and Peephole Optimizer are done in groups of 2 or 3 – Undergraduates are strongly recommended to work in groups of 3 – Picking a good group is important. If your group dynamics fail, you can either work things out, or work alone for the rest of the project • We will use GitHub for the GoLite project • Start looking for your teammates! You will have to declare your group by the add/drop deadline

  18. COMP 520 Winter 2020 Introduction (18) Introduction Course Outline Compilers Overview Bootstrapping

  19. COMP 520 Winter 2020 Introduction (19) New Programming Languages per Year 130 120 110 100 90 80 70 60 50 40 30 20 10 0 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93

  20. COMP 520 Winter 2020 Introduction (20) Popular Programming Languages http://www.tiobe.com/tiobe-index/

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