Run time storage administration in compiler design

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(SP) register, thus establishing the bottom of the stack. First, it fetches the address stored in theД¤ bytes beginning at location 000000 Aand copies this address into the stack pointer

Things before executing any instructions. Phase is responsible for initializing core elements of the hardware and keyДЇor example, when a 68K microprocessor first comes out of RESET, it does two

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Instructions in the program define the software phase of the startup.

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The primary responsibility of this part is to force the CPU to begin executing the program or some code that will transfer control to the program. When the RESET line is activated, the processor executes the hardware phase. The startup sequence has two phases: a hardware phase and a software phase. Other mechanisms for getting the code into the target are discussed later. This section assumes the deviceвЂ™s program has been loaded into the proper memory space - perhaps by вЂњburningвЂќ it into erasable, programmable, read-only memory (EPROM) and then plugging that EPROM into the system board. Understanding the layout of memory makes it easier to understand the startup sequence. The fact that available RAM memory could be an issue might have an impact on the type of programming methods you use or an influence on the hardware design. Then, add a safety factor (2X, perhaps) to allow for unintended stack growth. Run the program for a while and see how much of this pattern has been overwritten by stack operations. In The Art of Embedded Systems, Jack Ganssle suggests that during system development and debug, you fill the stack space with a known pattern, such as 0x5555 or 0xAA. In fact, it might be years before this particular defect causes a failure. Crashes in embedded systems that are not deterministic (such as a bug in the code) are extremely difficult to find. Bennet, вЂњIntroduction to Compiler TechniquesвЂќ, Second Edition, Tata McGraw-Hill,2003.ДЈ.Henk Alblas and Albert Nymeyer, вЂњPractice and Principles of Compiler Building with CвЂќ, PHI, 2001.Into empty space, the system crashes. Muneeswaran,Compiler Design,First Edition,Oxford University Press.Дў.J.P. Charles Fischer and Ricard LeBlanc,вЂќ Crafting a Compiler with CвЂќ, Pearson EducationДЎ.K. Kenneth Louden,вЂќ Compiler ConstructionвЂќ, Cengage Learning.Д¤. V Raghvan, вЂњ Principles of Compiler DesignвЂќ, TMHДЈ. Aho, Sethi & Ullman, вЂњCompilers: Principles, Techniques and ToolsвЂќ, Pearson EducationДў. Code optimization: Machine-Independent Optimizations, Loop optimization, DAG representation of basic blocks, value numbers and algebraic laws, Global Data-Flow analysis.ДЎ. Addresses 8 in the Target Code, Basic Blocks and Flow Graphs, Optimization of Basic Blocks, Code Generator.

V Code Generation: Design Issues, the Target Language. Error Detection & Recovery: Lexical Phase errors, syntactic phase errors semantic errors. Run-Time Administration: Implementation of simple stack allocation scheme, storage allocation in block structured language. IV Symbol Tables: Data structure for symbols tables, representing scope 8 information. More about translation: Array references in arithmetic expressions, procedures call, declarations and case statements. III Syntax-directed Translation: Syntax-directed Translation schemes, 8 Implementation of Syntax-directed Translators, Intermediate code, postfix notation, Parse trees & syntax trees, three address code, quadruple & triples, translation of assignment statements, Boolean expressions, statements that alter the flow of control, postfix translation, translation with a top down parser. II Basic Parsing Techniques: Parsers, Shift reduce parsing, operator 8 precedence parsing, top down parsing, predictive parsers Automatic Construction of efficient Parsers: LR parsers, the canonical Collection of LR(0) items, constructing SLR parsing tables, constructing Canonical LR parsing tables, Constructing LALR parsing tables, using ambiguous grammars, an automatic parser generator, implementation of LR parsing tables.

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The syntactic specification of programming languages: Context free grammars, derivation and parse trees, capabilities of CFG. I Introduction to Compiler, Phases and passes, Bootstrapping, Finite 8 state machines and regular expressions and their applications to lexical analysis, Optimization of DFA-Based Pattern Matchers implementation of lexical analyzers, lexical-analyzer generator, LEX- compiler, Formal grammars and their application to syntax analysis, BNF notation, ambiguity, YACC.

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Run time storage administration in compiler design