Linearly ordered attribute grammar scheduling using SAT-solving
Paper i proceeding, 2015

© Springer-Verlag Berlin Heidelberg 2015. Many computations over trees can be specified using attribute grammars. Compilers for attribute grammars need to find an evaluation order (or schedule) in order to generate efficient code. For the class of linearly ordered attribute grammars such a schedule can be found statically, but this problem is known to be NP-hard. In this paper, we show how to encode linearly ordered attribute grammar scheduling as a SAT-problem. For such grammars it is necessary to ensure that the dependency graph is cycle free, which we approach in a novel way by transforming the dependency graph to a chordal graph allowing the cycle freeness to be efficiently expressed and computed using SAT solvers. There are two main advantages to using a SAT-solver for scheduling: (1) the scheduling algorithm runs faster than existing scheduling algorithms on real-world examples, and (2) by adding extra constraints we obtain fine-grained control over the resulting schedule, thereby enabling new scheduling optimisations.

Static analysis


Attribute Grammars


J. Bransen

Utrecht University

L.T. Van Binsbergen

Utrecht University

Royal Holloway University of London

Koen Lindström Claessen

Chalmers, Data- och informationsteknik, Programvaruteknik

A.H. Dijkstra

Utrecht University

Lecture Notes in Computer Science

0302-9743 (ISSN)

Vol. 9035 289-303