NDLI: Loop squashing transformations for amorphous slicing

Content Provider	IEEE Xplore Digital Library
Author	Lin Hu Harman, M. Hierons, R.M. Binkley, D.
Copyright Year	2004
Description	Author affiliation: Brunel Univ., Uxbridge, UK (Lin Hu; Harman, M.; Hierons, R.M.)
Abstract	Program slicing is a source code extraction technique that can be used to support reverse engineering by automatically extracting executable subprograms that preserve some aspect of the original program's semantics. Although minimal slices are not generally computable, safe approximate algorithms can be used to good effect. However, the precision of such slicing algorithms is a major factor in determining the value of slicing for reverse engineering. Amorphous slicing has been proposed as a way of reducing the size of a slice. Amorphous slices preserve the aspect of semantic interest, but not the syntax that denotes it, making them generally smaller than their syntactically restricted counterparts. Amorphous slicing is suitable for many reverse engineering applications, since reverse engineering typically abandons the existing syntax to facilitate structural improvements. Previous work on amorphous slicing has not attempted to exploit its potential to apply loop-squashing transformations. This paper presents an algorithm for amorphous slicing of loops, which identifies induction variables, transformation rule templates and iteration-determining compile-time expressions. The algorithm uses these to squash certain loops into conditional assignments. The paper also presents an inductive proof of the rule templates and illustrates the application of the algorithm with a detailed example of loop squashing.
Sponsorship	Reengineering Forum IEEE Comput. Soc. Tech. Council on Software Eng
Starting Page	152
Ending Page	160
File Size	169205
Page Count	9
File Format	PDF
ISBN	0769522432
ISSN	10951350
DOI	10.1109/WCRE.2004.26
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-11-08
Publisher Place	Netherlands
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Amorphous materials Reverse engineering Educational institutions Testing
Content Type	Text
Resource Type	Article

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