Assignment Commands with Array References

Peter J. Downey; Ravi Sethi

doi:10.1145/322092.322104

Assignment Commands with Array References

Peter J. Downey, Ravi Sethi

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

Stratght line programs with assignment statements involving both simple and array variables are considered Two such programs are equivalent if they compute the same values as a function of the inputs. Testing the equivalence of array programs ts shown to be NP-hard If array variables are updated but never subsequently referenced, equivalence can be tested in polynomial time Programs without array varmbles can be tested for equivalence in expected linear time.

Original language	English (US)
Pages (from-to)	652-666
Number of pages	15
Journal	Journal of the ACM (JACM)
Volume	25
Issue number	4
DOIs	https://doi.org/10.1145/322092.322104
State	Published - Oct 1 1978
Externally published	Yes

Keywords

array asstgnments
data structures
NP-complete
semanttcs

ASJC Scopus subject areas

Software
Control and Systems Engineering
Information Systems
Hardware and Architecture
Artificial Intelligence

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10.1145/322092.322104

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