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CPSC 388 – Compiler Design and Construction

CPSC 388 – Compiler Design and Construction. Midterm Review. History and Basics of Programming Languages. Advances in Programming languages Imperative and Declarative Languages Static/Dynamic Distinction Environments and States Static Scope and Block Structure Explicit Access Control

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CPSC 388 – Compiler Design and Construction

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  1. CPSC 388 – Compiler Design and Construction Midterm Review

  2. History and Basics of Programming Languages • Advances in Programming languages • Imperative and Declarative Languages • Static/Dynamic Distinction • Environments and States • Static Scope and Block Structure • Explicit Access Control • Dynamic Scope • Parameter Passing • Aliasing

  3. Software • Make • JLex • Java_cup • Java • Javac

  4. Structure of Compiler • Compilers Translate Source Language to Target Language • Compilers have several steps • Scanner • Parser • Semantic Analyzer • Intermediate Code Generator • Optimizer • Code Generator • Symbol Table Used To Keep Track of Names Used in Program • Front End and Back End Simplify Compiler Design • Introduction of new languages • Introduction of new hardware

  5. Scanning • General: what does a scanner do; how does it fit into the design of a compiler? • Underlying Model: Finite-State Machines • Implementing a Scanner using a transition table • Specification of a scanner: • Regular Expressions • JLex Specifications

  6. Finite State Machines • Deterministic Finite State Machine • Non-deterministic Finite State Machine • Conversion from NFA to DFA

  7. Regular Expressions, Regular Definitions, and JLex • Syntax and semantics of RE • Base operators and extended operators • Character Classes • Conversion from RE to NFA • JLex specification • Use of RE • Associated Action • Macros • Matching rules

  8. Context-Free Grammars • Leftmost, Rightmost derivations • Parse Trees • Expression Grammars • Precedence • Associativity • List Grammars • Ambiguous Grammars • Recursive Grammars (left recursive, right recursive)

  9. Syntax-Directed Translation • “plain” translations • Writing rules of the form S1.trans=… • Java_cup translations • Using “:xx” to name the translation associated with a symbol defining translations by assigning to RESULT

  10. Parsing, LL(1) and LALR(1) grammars • General: what does a parser do; how does it fit into the design of a compiler? • Top-Down Parsing • predictive parsing (using a stack and a parse table) • left factoring • removing left recursion • First and Follow sets (how to compute and why they are important) • building the parse table

  11. Textbook Sections Covered • Chapter 1 Introduction • Chapter 3 Lexical Analysis • 3.1, 3.3, 3.6, 3.7.1, 3.7.4 • Chapter 4 Syntax Analysis • 4.1, 4.2, 4.3, 4.4, 4.8, • Chapter 5 Syntax-Directed Translation • 5.1, 5.2, 5.3

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