phases of compiler-analysis phase
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The compilation process consists of multiple phases that each take the output from the previous phase as input. The phases are: lexical analysis, syntax analysis, semantic analysis, intermediate code generation, code optimization, and code generation. The analysis phase consists of three sub-phases: lexical analysis, syntax analysis, and semantic analysis. Lexical analysis converts the source code characters into tokens. Syntax analysis constructs a parse tree from the tokens. Semantic analysis checks that the program instructions are valid for the programming language. The entire compilation process takes the source code as input and outputs the target program after multiple analysis and synthesis phases.
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phases of a compiler
The document describes the main phases of a compiler: lexical analysis, syntax analysis, semantic analysis, intermediate code generation, code optimization, and code generation. Lexical analysis converts characters into tokens. Syntax analysis groups tokens into a parse tree based on grammar rules. Semantic analysis checks types and meanings. Intermediate code generation outputs abstract machine code. Code optimization improves efficiency. Code generation produces target code like assembly.
1.Role lexical Analyzer
The document discusses the role and process of a lexical analyzer in compiler design. A lexical analyzer groups input characters into lexemes and produces a sequence of tokens as output for the syntactic analyzer. It strips out comments and whitespace, correlates line numbers with errors, and interacts with the symbol table. Lexical analysis improves compiler efficiency, portability, and allows for simpler parser design by separating lexical and syntactic analysis.
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The document discusses compiler design options and the differences between compilers and interpreters. It states that a compiler converts a high-level language program into machine code all at once, while an interpreter converts the program line-by-line at runtime. Compilers generally execute programs faster but take longer to compile, while interpreters execute more slowly but can compile incrementally and debug line-by-line. The document also covers pure and impure interpreters, p-code compilers, and the roles of compilers and interpreters.
Techniques & applications of Compiler
A compiler is a program that translates a program written in a source language into an equivalent program in a target language. It has two major phases: analysis and synthesis. The analysis phase creates an intermediate representation using tools like a lexical analyzer, syntax analyzer, and semantic analyzer. The synthesis phase creates the target program from this representation using tools like an intermediate code generator, code optimizer, and code generator. Techniques used in compiler design like lexical analysis, parsing, and code generation have applications in other areas like text editors, databases, and natural language processing.
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The document discusses the phases of compilation:
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2. The back-end performs code optimization and generation to produce efficient machine-specific code from the intermediate representation.
3. Key phases include lexical and syntax analysis, semantic analysis, intermediate code generation, code optimization, and code generation.
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phases of a compiler
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what is compiler and five phases of compiler
pls download to see full transition and parse tree structure .pls contact for further detail
adilm717@gmail.com
The Phases of a Compiler
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4. Intermediate code is generated for an abstract machine.
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The document describes the various phases of compilation:
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what is compiler and five phases of compiler
pls download to see full transition and parse tree structure .pls contact for further detail
adilm717@gmail.com
The Phases of a Compiler
We have learnt that any computer system is made of hardware and software.
The hardware understands a language, which humans cannot understand. So we write programs in high-level language, which is easier for us to understand and remember.
These programs are then fed into a series of tools and OS components to get the desired code that can be used by the machine.
This is known as Language Processing System.
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- The main phases of compilation: lexical analysis, syntax analysis, semantic analysis, code generation, and optimization
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- Related software tools like preprocessors, assemblers, loaders, and linkers
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This document provides an overview of compiler design, including:
- The history and importance of compilers in translating high-level code to machine-level code.
- The main components of a compiler including the front-end (analysis), back-end (synthesis), and tools used in compiler construction.
- Key phases of compilation like lexical analysis, syntax analysis, semantic analysis, code optimization, and code generation.
- Types of translators like interpreters, assemblers, cross-compilers and their functions.
- Compiler construction tools that help generate scanners, parsers, translation engines, code generators, and data flow analysis.
A Role of Lexical Analyzer
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The document discusses the different phases of a compiler:
1. Lexical analysis scans source code as characters and converts them into tokens.
2. Syntax analysis checks token arrangements against the grammar to ensure syntactic correctness.
3. Semantic analysis checks that rules like type compatibility are followed.
4. Intermediate code is generated for an abstract machine.
5. Code optimization removes unnecessary code and improves efficiency.
6. Code generation translates the optimized intermediate code to machine language.
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This document summarizes key topics in intermediate code generation discussed in Chapter 6, including:
1) Variants of syntax trees like DAGs are introduced to share common subexpressions. Three-address code is also discussed where each instruction has at most three operands.
2) Type checking and type expressions are covered, along with translating expressions and statements to three-address code. Control flow statements like if/else are also translated using techniques like backpatching.
3) Backpatching allows symbolic labels in conditional jumps to be resolved by a later pass that inserts actual addresses, avoiding an extra pass. This and other control flow translation topics are covered.
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A compiler is a program that translates one programming language into another. It has six main phases: lexical analysis, syntax analysis, semantic analysis, intermediate code generation, code optimization, and code generation. It also uses a symbol table to store identifiers and their properties and handles errors detected in each phase.
Introduction to Compilers
The document provides an introduction to compilers, describing compilers as programs that translate source code written in a high-level language into an equivalent program in a lower-level language. It discusses the various phases of compilation including lexical analysis, syntax analysis, semantic analysis, code optimization, and code generation. It also describes different compiler components such as preprocessors, compilers, assemblers, and linkers, and distinguishes between compiler front ends and back ends.
Phases of Compiler.pptx
The document summarizes the six main phases of a compiler:
1. The lexical analyzer identifies tokens from the source code and removes whitespace and comments.
2. The syntax analyzer checks that the code follows grammar rules of the language and constructs a parse tree.
3. The semantic analyzer verifies type consistency and checks for semantic errors using the symbol table and parse tree.
4. The intermediate code generator produces machine-independent code in a form that can be optimized and executed.
5. The code optimizer improves performance by removing unused code and variables without altering meaning.
6. The code generator produces machine-specific object code by selecting instructions and registers for the target platform.
role of lexical anaysis
The document discusses the different phases of a compiler:
1. Lexical analysis scans source code and converts it to tokens.
2. Syntax analysis checks token arrangements against the grammar to validate syntax.
3. Semantic analysis checks that rules like type compatibility are followed.
4. Intermediate code is generated for an abstract machine.
5. Code is optimized in the intermediate representation.
6. Code generation produces machine code from the optimized intermediate code.
Phases of Compiler.pdf
1. The document describes the 6 main phases of a compiler: lexical analysis, syntax analysis, semantic analysis, intermediate code generation, code optimization, and code generation.
2. Each phase transforms the source program into different representations, with the lexical analyzer identifying tokens, the syntax analyzer constructing a parse tree, and the semantic analyzer performing type checking.
3. The intermediate code generator produces machine-independent code, the code optimizer improves performance, and the code generator outputs machine-specific object code.
Chapter-1.pptx compiler Design Course Material
The document describes the phases of a compiler. It discusses lexical analysis, syntax analysis, semantic analysis, intermediate code generation, code optimization and code generation.
Lexical analysis scans the source code and returns tokens. Syntax analysis builds an abstract syntax tree from tokens using a context-free grammar. Semantic analysis checks for semantic errors and annotates the tree with types. Intermediate code generation converts the syntax tree to an intermediate representation like 3-address code. Code generation outputs machine or assembly code from the intermediate code.
Assignment1
A compiler is a program that translates a program written in a source language into a target language. It has two main parts: analysis and synthesis. The analysis part breaks down the source code using lexical analysis, syntax analysis, and semantic analysis. The synthesis part constructs the target program using intermediate code generation, code optimization, and code generation. A compiler translates the source code into assembly code, which is then assembled into machine code and linked with libraries to create an executable program.
2-Design Issues, Patterns, Lexemes, Tokens-28-04-2023.docx
The document discusses the phases of a compiler including lexical analysis, syntax analysis, semantic analysis, intermediate code generation, code optimization, and code generation. It describes the role of the lexical analyzer in translating source code into tokens. Key aspects covered include defining tokens and lexemes, using patterns and attributes to classify tokens, and strategies for error recovery in lexical analysis such as buffering input.
Chapter1pdf__2021_11_23_10_53_20.pdf
The document provides an introduction to compilers, including definitions of key terms like compiler, interpreter, assembler, translator, and phases of compilation like lexical analysis, syntax analysis, semantic analysis, code generation, and optimization. It also discusses compiler types like native compilers, cross compilers, source-to-source compilers, and just-in-time compilers. The phases of a compiler include breaking down a program, generating intermediate code, optimizing, and creating target code.
Compiler Design
In this PPT we covered all the points like..Introduction to compilers - Design issues, passes, phases, symbol table
Preliminaries - Memory management, Operating system support for compiler, Compiler support for garbage collection ,Lexical Analysis - Tokens, Regular Expressions, Process of Lexical analysis, Block Schematic, Automatic construction of lexical analyzer using LEX, LEX features and specification.
Chapter 1.pptx
The document summarizes the key phases of a compiler:
1. The compiler takes source code as input and goes through several phases including lexical analysis, syntax analysis, semantic analysis, code optimization, and code generation to produce machine code as output.
2. Lexical analysis converts the source code into tokens, syntax analysis checks the grammar and produces a parse tree, and semantic analysis validates meanings.
3. Code optimization improves the intermediate code before code generation translates it into machine instructions.
Spr ch-05-compilers
1. A compiler translates a program written in a high-level language into an equivalent program in machine-level language.
2. The main phases of a compiler are lexical analysis, syntax analysis, semantic analysis, intermediate code generation, and code optimization.
3. Lexical analysis involves scanning the source code and grouping characters into tokens. Syntax analysis checks that the tokens form syntactically correct statements. Semantic analysis performs type checking and tracks variable attributes in a symbol table.
Compiler design
The document discusses the different phases of a compiler:
1. Lexical analysis scans the source code as characters and converts them into tokens.
2. Syntax analysis takes the tokens and checks that they form a syntactically correct parse tree based on the language's grammar.
3. Semantic analysis checks that the parse tree follows the language's rules, such as compatible data types in assignments.
Compiler Construction
Translation of a program written in a source language into a semantically equivalent program written in a target language
Similar to phases of compiler-analysis phase (20)
2-Design Issues, Patterns, Lexemes, Tokens-28-04-2023.docx
2-Design Issues, Patterns, Lexemes, Tokens-28-04-2023.docx
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Syllabus
Chapter-1
Introduction to objective, scope and outcome the subject
Chapter 2
Introduction: Scope and Specialization of Civil Engineering, Role of civil Engineer in Society, Impact of infrastructural development on economy of country.
Chapter 3
Surveying: Object Principles & Types of Surveying; Site Plans, Plans & Maps; Scales & Unit of different Measurements.
Linear Measurements: Instruments used. Linear Measurement by Tape, Ranging out Survey Lines and overcoming Obstructions; Measurements on sloping ground; Tape corrections, conventional symbols. Angular Measurements: Instruments used; Introduction to Compass Surveying, Bearings and Longitude & Latitude of a Line, Introduction to total station.
Levelling: Instrument used Object of levelling, Methods of levelling in brief, and Contour maps.
Chapter 4
Buildings: Selection of site for Buildings, Layout of Building Plan, Types of buildings, Plinth area, carpet area, floor space index, Introduction to building byelaws, concept of sun light & ventilation. Components of Buildings & their functions, Basic concept of R.C.C., Introduction to types of foundation
Chapter 5
Transportation: Introduction to Transportation Engineering; Traffic and Road Safety: Types and Characteristics of Various Modes of Transportation; Various Road Traffic Signs, Causes of Accidents and Road Safety Measures.
Chapter 6
Environmental Engineering: Environmental Pollution, Environmental Acts and Regulations, Functional Concepts of Ecology, Basics of Species, Biodiversity, Ecosystem, Hydrological Cycle; Chemical Cycles: Carbon, Nitrogen & Phosphorus; Energy Flow in Ecosystems.
Water Pollution: Water Quality standards, Introduction to Treatment & Disposal of Waste Water. Reuse and Saving of Water, Rain Water Harvesting. Solid Waste Management: Classification of Solid Waste, Collection, Transportation and Disposal of Solid. Recycling of Solid Waste: Energy Recovery, Sanitary Landfill, On-Site Sanitation. Air & Noise Pollution: Primary and Secondary air pollutants, Harmful effects of Air Pollution, Control of Air Pollution. . Noise Pollution Harmful Effects of noise pollution, control of noise pollution, Global warming & Climate Change, Ozone depletion, Greenhouse effect
Text Books:
1. Palancharmy, Basic Civil Engineering, McGraw Hill publishers.
2. Satheesh Gopi, Basic Civil Engineering, Pearson Publishers.
3. Ketki Rangwala Dalal, Essentials of Civil Engineering, Charotar Publishing House.
4. BCP, Surveying volume 1
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phases of compiler-analysis phase
- 2. The compilation process is a sequence of various phases. Each phase takes input from its previous stage and feeds its output to the next phase of the compiler The compiler has a number of phases plus symbol table manager and an error handler Input Source Program -> Lexical Analyzer-> Syntax Analyzer ->Semantic Analyzer Intermediate Code Generator ->Code Optimizer ->Code Generator ->Out Target Program
- 3. Whole compilation process consists of two phase : 1.Analysis phase 2.Synthesis phase
- 4. Analysis phase Analysis Phase again consist of three sub- phases:- Lexical analysis Syntax analysis Semantic analysis
- 5. Lexical Analysis A program which is responsible for converting sequence of characters into sequence of tokens from the source program is known as Lexical analyzer or scanner or lexer. This entire process is called Lexical analysis. By the term Token here means the unit of information present in the source code.
- 6. The main purpose of the Lexical Analysis phase of a compiler is: Read the stream of input character from the source code. Produce as output as a sequence of tokens.
- 7. Syntax analysis As the lexical analyzer generates tokens from the source code, in this phase it constructs parse tree from the tokens obtain from the previous lexical analyses phase. Syntax analysis is about discovering structure in text and is used to determine whether or not a text conforms to an expected format. Main objective of this phase is to check whether the source code written by programmer is properly correct or not according to the rules as specified by the particular language by constructing the parse tree from the tokens.
- 9. Consider the following part of a program : …............................................................ position : = initial + rate * 60 After the lexical analysis phase of the above source we got : Identifier : position, initial, rate Operators : : = , + , * Constant : 60
- 10. Semantic analysis Main Objective is to check whether they form a sensible set of instructions in the programming language. For a Computer program, to be semantically valid, all variables, functions etc. must be properly defined, expressions and variables must be used in ways that respect the type system, access control must be respected, and so forth. Here in this phase, we need to ensure that program is sound enough to carry on to code generation
- 11. Thank you