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by: Vito Quigley


Vito Quigley
GPA 3.55

David Whalley

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About this Document

David Whalley
Class Notes
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Popular in Computer Programming

This 3 page Class Notes was uploaded by Vito Quigley on Thursday September 17, 2015. The Class Notes belongs to COP 5621 at Florida State University taught by David Whalley in Fall. Since its upload, it has received 64 views. For similar materials see /class/205472/cop-5621-florida-state-university in Computer Programming at Florida State University.




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Date Created: 09/17/15
Extra Concepts Introduced Compilation Issues Compilation Issues Source Language Bootstrapping Target Language Testing and Maintenance Performance Criteria Source Language Issues Target Language Issues Size of the language Maturity of the architecture Stability of the language Design of the intermediate language Performance Criteria Compiler Speed Generated Code Quality speed code size power consumption Error Diagnostics Portability retargetability rehostability Maintainability Cross Compiling A cross compiler runs on one machine and produces target code for another machine Example A cross compiler that compiles language L is written in language L and produces code for machine N An existing compiler compiles language L executes on machine M and generates code for machine M Bootstrapping Bootstrapping involves using the facilities of the source language to compile the compiler A compiler is characterized by three languages 1 S the source language that it compiles 2 T the target language it generates 3 I the language in which it is implemented Can be represented with a T diagram Or with text S I T Compiling a New Language Can write a simple compiler that consists of a subset S of L that executes on machine M and produces code for machine M We can then use this subset S to write a compiler that compiles L into M code quotnew Optimizing a Compiler We can use a compiler to compile itself to get a faster compiler Say we have implemented a compiler that compiles source language S written in source language S and produces code for machine M We also have access to another compiler for S that produces poor code p for machine M call it Mp and runs slowly Mp Testing and Maintenance Need a large test suite to attempt to verify the correctness of a compiler Maintenance requires Good programming style Good documentation Configuration management Tools for Compiler Development makefiles profilers sourcelevel debuggers crossreference generators static checkers


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