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Program Optimization Using Invariants

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Publicado no:IEEE Transactions on Software Engineering vol. 4, no. 5 (Sep 1978), p. 378
Autor principal: Katz, S
Publicado em:
IEEE Computer Society
Assuntos:
Software
Programs
Optimization
Mathematical models
Computer science
Computer programming
Computers
Semantics
Colleges & universities
Acesso em linha:Citation/Abstract
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Resumo:Compilers to "optimize" the code produced from computer programs have been in use for many years. Optimization improves execution time of a program by changing or moving some of the statements and leaving the correctness of the program intact. All crucial relationships are maintained between the variables. Computations are tests are altered to reduce the time needed for computation. One technique of optimization imvolves various program transformations that are independent of the machine code. They can be applied to an intermediate-level program prior to machine code generation or directly to source-level programs. The user defines the acceptable input values for the program and the desired relationship between the input and output. "Invariant assertions" are then attached to prechosen points in the program. The correctness of the program with respect to its specifications is provided by these assertions. Figures.
ISSN:0098-5589
1939-3520
DOI:10.1109/TSE.1978.233858
Fonte:ABI/INFORM Global