Improvements in a functional core language with call-by-need operational semantics

  • An improvement is a correct program transformation that optimizes the program, where the criterion is that the number of computation steps until a value is obtained is decreased. This paper investigates improvements in both { an untyped and a polymorphically typed { call-by-need lambda-calculus with letrec, case, constructors and seq. Besides showing that several local optimizations are improvements, the main result of the paper is a proof that common subexpression elimination is correct and an improvement, which proves a conjecture and thus closes a gap in Moran and Sands' improvement theory. We also prove that several different length measures used for improvement in Moran and Sands' call-by-need calculus and our calculus are equivalent.

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Metadaten
Author:Manfred Schmidt-SchaußORCiDGND, David SabelORCiDGND
URN:urn:nbn:de:hebis:30:3-412383
URL:http://www.ki.informatik.uni-frankfurt.de/papers/frank/frank55v2.pdf
Parent Title (German):Technical report Frank / Johann-Wolfgang-Goethe-Universität, Fachbereich Informatik und Mathematik, Institut für Informatik ; 55 [version 2.0])]
Series (Serial Number):Technical report Frank / Johann-Wolfgang-Goethe-Universität, Fachbereich Informatik und Mathematik, Institut für Informatik (55 [version 2.0])
Publisher:Johann Wolfgang Goethe-Univ., Fachbereich Informatik und Mathematik, Inst. für Informatik, Research group for Artificial Intelligence and Software Technology
Place of publication:Frankfurt am Main
Document Type:Working Paper
Language:English
Date of Publication (online):2015/11/30
Date of first Publication:2015/11/30
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2016/08/30
Edition:Revision V2 from November 30, 2015
Page Number:36
HeBIS-PPN:386842140
Institutes:Informatik und Mathematik / Informatik
Dewey Decimal Classification:0 Informatik, Informationswissenschaft, allgemeine Werke / 00 Informatik, Wissen, Systeme / 004 Datenverarbeitung; Informatik
Sammlungen:Universitätspublikationen
Licence (German):License LogoDeutsches Urheberrecht

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