Phases of Compiler

Duration: 9 min

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Inside: a video lesson and guided study material.

Module outline

  1. General Intelligence & Reasoning: Analogy, Non Verbal Reasoning (Spatial Aptitude) (Spatial Reasoning) (Visual Reasoning), Series (Number and Letter Series) (Numerical Relations and Reasoning), Coding Decoding, Blood Relations, Directions (Direction Test), Ranking, Order and Sequence, Logical Sequence Of Words, Syllogisms, Venn Diagram, Deductive and Inductive Reasoning (Logical Deduction and Induction) (Prepositional Reasoning), Selection Decision Table (Decision Making), Data Sufficiency, Puzzle Solving (Puzzles), Data Arrangement, Cubes & Dices, Calendar, Clock, Arithmetic, Number System, HCF LCM, Verbal Analogy (Word Based Analogy), Visual Recognition and Figure Completion, Paper Folding and Cutting, Transformation of Shapes, Clocks and Calendars, Direction Sense, Cubes and Dice, Patterns in Two-Dimensional Figures, Seating Arrangements, Analogy and Classification, Logical Deduction and Induction, Alphabet and Word Tests, Mathematical Operations, Series Completion, Simplification and Approximation, Coding and Decoding, Numerical Reasoning, Assembling and Grouping of Shapes, Three-Dimensional Patterns and Visualization, Vocabulary, Number System, Averages, Mixtures and Alligation, Simple and Compound Interest, Percentages, Algebra, Speed, Time and Distance, Seating and Arrangement Puzzles, Traverse Surveying, Order, Ranking and Sequence, Constraint Puzzles, Syllogisms and Venn Diagrams, Reading Comprehension, Critical Reasoning, Permutations and Combinations, Narrative Sequencing, Project Monitoring, Resources and Safety, Profit, Loss and Discount, Ratio and Proportion, Time and Work, Mensuration, Data Interpretation, Powers, Surds and Logarithms, Sequences and Series, Articles and Determiners, Sentence Completion, Data Sufficiency, Blood Relations, Simple Interest and Compound Interest, Mixture and Alligation, Sequence and Series (Series), Speed Time and Distance, Algebra, Profit and Loss, Powers and Exponents (Surds and Indices), Permutation and Combination
  2. General Awareness: Physics, Chemistry, Biology, History, Geography, Polity, Indian Economy, Environment, Static General Knowledge, GK- Current Affairs, Artificial Intelligence, MS Office Applications, Terms & Abbreviations, Keyboard Shortcuts, Evolution of Indian Banking (Banking & Financial Awareness), Emerging Tech Trends
  3. Engineering Mathematics: Set Theory, Relations, Functions, Graph Theory, Group Theory, Propositional and Predicate Logic, Linear Algebra, Calculus, Probability, Statistics, Signal Space and Optimum Detection, Probability, Statistics
  4. Digital Logic: Digital Systems & Boolean Basics, Logic Gates & Hardware, Boolean Expression, Boolean Minimization, Combinational Circuit, Sequential Circuits, Number System, Number Representation, Floating Point Rep, Number Systems and Codes, Registers and Counters, Boolean Algebra and Logic Gates, Microprocessors and Microcontrollers, Logic Families and CMOS Logic, Microprocessors, Logic Gates and Boolean Algebra, Minimization of Boolean Functions, Timing, Hazards and Testing, Logic Families, Combinational Logic Design, Arithmetic Circuits, Waveform Generators and Timer Circuits, Semiconductor Memories and Programmable Logic Devices, Combinational Logic Circuits, Latches and Flip-Flops, Finite State Machines, Sequential Circuits and State Machines, Minimization of Boolean Functions, Arithmetic Circuits, Latches and Flip-Flops, Number Systems and Codes, Registers and Counters
  5. Computer Organisation & Architecture: Basics of COA, Cache Memory Organization, Input Output Organisation, Pipelining, Instr Formats & Modes, Control Unit Design, Programming the Basic Computer, Register Transfer and Microoperations, Semiconductor Memories and Programmable Logic, Processor Organization and Instructions, Memory Hierarchy and Input/Output, Registers and Counters
  6. Programming & Data Structures: C Fundamentals, Control Flow, Functions, Arrays & Pointers, Storage Classes, Structures & Enums, DMA, Macros, Scoping & File Handling, Introduction to DS, Array, Stack, Queue, Linked List, Tree, Graphs, Hashing, HTML Basics, OOPS with C++, Java, Object Oriented Technology
  7. Databases: Basics of DBMS, ER Diagram, Relational Model & Functional Dependencies, Keys & Integrity Constraints, Normalization (1NF - BCNF), Decomposition Properties & 4NF, File Organization & Indexing, Relational Algebra, SQL, Relational Calculus, Transaction Management, Concurrency Control, Database Recovery, Database Security & Authorization
  8. Algorithms: Algorithm Analysis, Time Complexity Analysis, Sorting Algorithms, Greedy Algorithms, Dynamic Programming, Minimum Spanning Trees, Shortest Path Algos
  9. Theory of Computation: Introduction to TOC, Deterministic FA (DFA), Non-Deterministic FA, Regular Expressions, Grammar, Regular Language Properties, Moore & Mealy Machines, Pushdown Automata & CFG, Turing Machines, Complexity Theory
  10. Compiler Design: Intro to Compilers, Lexical Analysis, Grammar & CFG, Syntax Analysis: Top-Down, Syntax Analysis: Bottom-Up, Semantic Analysis & SDT, Intermediate Code Gen, Code Optimization, Run Time Environment
  11. Operating System: Introduction to OS, Process Management, CPU Scheduling, Process Synchronization, Threads & Process Creation, Deadlock, Memory Management, Virtual Memory, Disc Scheduling, File Management, Security, Windows OS, Distributed Systems, Unix OS, Linux OS
  12. Computer Networks: Introduction to CN, DLL: Access Control, DLL: Flow Control, DLL: Error Control, DLL: Framing, Data Link Layer - Ethernet, Net Layer: IPv4 & Proto, Net Layer: IP Addressing, Net Layer:Routing Protocol, Transport Layer Services, TL: Congestion & UDP, Application Layer, Hardware Basics, Data Communication, Website, Browser & Services, Web Design & Development, Network Security, Cyber Threats and Malware Attacks, Cyber Safety and Security
  13. Full Length Mock Tests:
  14. Sectional Tests:
AI summary & chapters

AI Summary

An AI-generated summary of this video lecture.

This educational video provides a detailed walkthrough of the compiler construction process, systematically explaining each phase from the Lexical Analyzer to the Target Code Generator. The instructor uses slides containing bullet points, diagrams, and code examples to illustrate how high-level source code is transformed into machine-executable assembly code. Key concepts covered include the conversion of lexemes to tokens, the construction of parse trees using Context Free Grammar, semantic verification, intermediate code generation (Three Address Code), code optimization, and final target code generation. The lecture emphasizes the flow of data between phases and the specific responsibilities of each component within the compiler architecture.

Chapters

  1. 0:00 – 2:00 00:00-02:00

    The instructor introduces the Lexical Analyzer, the first phase of compilation. The slide text explicitly states, "It reads the program and converts it into Lexemes" and "A stream of lexemes into a stream of tokens." He explains that tokens are defined by regular expressions understood by the analyzer and that it removes white-spaces and comments. A diagram on the right shows the overall compiler structure, with arrows indicating the flow from High Level Language through the Lexical Analyzer, Syntax Analyzer, and other phases down to Assembly Code. The instructor highlights the Lexical Analyzer box in the diagram to emphasize its position as the initial processing stage.

  2. 2:00 – 5:00 02:00-05:00

    The lecture transitions to the Syntax Analyzer, also referred to as the parser. The slide notes that it constructs a Parse/Syntax tree using productions of Context Free Grammar. The instructor displays specific grammar rules on the left: `S -> id = E`, `E -> E + T / T`, `T -> T * F / F`, and `F -> id / num`. He then demonstrates the construction of a parse tree for the expression `id1 = id2 + id3 * 60`. He draws the tree structure on the screen, showing how the expression is broken down hierarchically, with `S` at the root, followed by `id`, `=`, and `E`, which further branches into `E`, `+`, and `T` to represent the addition and multiplication operations.

  3. 5:00 – 9:29 05:00-09:29

    The final section covers the Semantic Analyzer, Intermediate Code Generator, Code Optimizer, and Target Code Generator. The Semantic Analyzer is described as verifying the parse tree for meaningfulness and producing a verified or annotated parse tree. The Intermediate Code Generator creates intermediate code, such as Three Address Code, with the example `t1 = z * 60`, `t2 = y + t1`, `x = t2`. The Code Optimizer transforms code to consume fewer resources and produce more speed, categorized into machine dependent and independent types. Finally, the Target Code Generator writes code the machine can understand, shown with assembly instructions like `MOV R1, Z`, `MUL R1, 60`, `ADD R1, Y`, and `STORE X, R1`. The instructor highlights that the output is dependent on the type of assembler.

The video effectively maps the entire compilation pipeline, demonstrating how source code undergoes progressive transformation. It begins with lexical analysis to tokenize input, moves to syntax analysis to build a structural tree, and proceeds to semantic analysis for meaning verification. The process continues with intermediate code generation to create a platform-independent representation, followed by optimization to improve efficiency. The final stage, target code generation, produces machine-specific assembly code. This structured approach ensures that the compiler can handle complex high-level languages and translate them into executable machine instructions efficiently.

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