编译原理2E全套配套课件龙书 Chapter_one.ppt

编译原理2E全套配套课件龙书 Chapter_one.ppt

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时间:2020-03-26

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1、COMPILERCONSTRUCTIONPrinciplesandPracticeKennethC.LoudenSanJoseStateUniversityContentINTRODUCTIONSCANNINGCONTEXT-FREEGRMMARSANDPARSINGTOP-DOWNPARSINGBOTTOM-UPPARSINGSEMANTICANALYSISRUNTIMEENVIRONMENTCODEGENERATION1.INTRODUCTIONWhatisacompiler?Acomputerprogramtranslatesonelanguagetoano

2、therAcompilerisacomplexprogramFrom10,000to1,000,000linesofcodesCompilersareusedinmanyformsofcomputingCommandinterpreters,interfaceprogramsCompilerSourceProgramTargetProgramWhatisthepurposeofthistextThistextistoprovidebasicknowledgeTheoreticaltechniques,suchasautomatatheoryThistextisto

3、givenecessarytoolsandpracticalexperienceAseriesofsimpleexamplesTINY,C-MinusMainTopics1.1WhyCompilers?ABriefHistory[Open]1.2ProgramsRelatedtoCompilers[Open]1.3TheTranslationProcess[Open]1.4MajorDataStructuresinaCompiler[Open]1.5OtherIssuesinCompilerStructure[Open]1.6BootstrappingandPor

4、ting[Open]1.7TheTINYSampleLanguageandCompiler[Open]1.8C-Minus:ALanguageforaCompilerProject[Open]1.1Why?ABriefHistoryWhyCompilerWritingmachinelanguage-numericcodesistimeconsumingandtediousC70600000002Movx,2X=2TheassemblylanguagehasanumberofdefectsNoteasytowriteDifficulttoreadandunderst

5、andBriefHistoryofCompilerThefirstcompilerwasdevelopedbetween1954and1957TheFORTRANlanguageanditscompilerbyateamatIBMledbyJohnBackusThestructureofnaturallanguagewasstudiedataboutthesametimebyNoamChomskyBriefHistoryofCompilerTherelatedtheoriesandalgorithmsinthe1960sand1970sTheclassificat

6、ionoflanguage:ChomskyhierarchyTheparsingproblemwaspursued:Context-freelanguage,parsingalgorithmsThesymbolicmethodsforexpressingthestructureofthewordsofaprogramminglanguage:Finiteautomata,RegularexpressionsMethodshavebeendevelopedforgeneratingefficientobjectcode:Optimizationtechniqueso

7、rcode,improvementtechniquesBriefHistoryofCompilerProgramsweredevelopedtoautomatethecomplierdevelopmentforparsingParsergenerators,suchasYaccbySteveJohnsonin1975fortheUnixsystemScannergenerators,suchasLexbyMikeLeskforUnixsystemaboutsametimeBriefHistoryofCompilerProjectsfocusedonautomati

8、ngthe

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