Compiler Design Unit 5 Notes AKTU (BCS602)

AKTU · BTECH · Semester 6 · Compiler Design · Unit 5 · Notes

AKTU Compiler Design (BCS602) Unit 5 notes for B.Tech Semester 6 – Code Generation and Code Optimization. Topics: Code Generation Design Issues, Target…

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Unit 5: Code Generation and Code Optimization – AKTU syllabus topics

  • Code Generation Design Issues
  • Target Language
  • Addresses in the Target Code
  • Basic Blocks and Flow Graphs: Basic Blocks, Flow Graphs
  • Optimization of Basic Blocks
  • Code Generator
  • Machine-Independent Optimizations
  • Loop Optimization
  • DAG Representation of Basic Blocks
  • Value Numbers and Algebraic Laws: Value Numbers, Algebraic Laws
  • Global Data-Flow Analysis

Most asked AKTU PYQ questions from Unit 5

  1. Q7a. Explain what constitutes a loop in a flow graph and how will do you do loop optimizations in code optimization of a compiler. (10 marks, 2023-24)
  2. Q2g. Discuss in detail the process of optimization of basic blocks. Give an example (10 marks, 2016-17)
  3. Q4b. Discuss the optimization techniques used at the basic block level. Explain with an example how a basic block can be optimized. (7 marks, 2024-25)
  4. Q7b. Explain what constitute a loop in flow graph and how will you do loop optimizations in code optimization of a compiler. (7 marks, 2018-19)
  5. Q1i. Elaborate the design issues of code generation. (2 marks, 2023-24)
  6. Q1j. Discuss about designing issues of code generator. (2 marks, 2020-21)
  7. Q5. Define a directed acyclic graph. Construct a DAG and write the sequence of instructions for the expression a+a*(b-c)+(b-c)*d (15 marks, 2016-17)
  8. Q2e. Explain the role of a code generator in a compiler. Discuss its responsibilities and how it translates intermediate code into the target code. (10 marks, 2023-24)
  9. Q7a. Consider a basic block with the following three instructions: 1. x = a + b 2. y = x * c 3. z = y – d Apply common sub expression elimination to optimize the basic block. (10 marks, 2023-24)
  10. Q7b. Construct a Directed Acyclic Graph (DAG) to represent the following basic block: 1. x = a + b 2. y = c - d 3. z = x * y (10 marks, 2023-24)

AKTU paper codes: BCS602

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