Analysis of recursive types in Lisp-like languages

  • Authors:
  • Edward Wang;Paul N. Hilfinger

  • Affiliations:
  • -;-

  • Venue:
  • LFP '92 Proceedings of the 1992 ACM conference on LISP and functional programming
  • Year:
  • 1992

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Abstract

We introduce a new algorithm to analyze recursive, structured types. It derives information from object uses (accesser functions with type checking), as well as from object allocation. The type description is a form of graph grammar and is naturally finite even in the presence of loops. The intended use of the algorithm is to discover and remove unnecessary type checks, but it can be augmented to provide alias information as well.