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Permanent link (DOI): https://doi.org/10.7939/R3NW5M
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Expression data flow graph: precise flow-sensitive pointer analysis for C programs Open Access
- Other title
- Type of item
- Degree grantor
University of Alberta
- Author or creator
- Supervisor and department
Amaral, José Nelson (Computing Science)
Lhoták, Ondřej (Computing Science)
- Examining committee member and department
Cockburn, Bruce (Electrical and Computer Engineering)
Hoover, James (Computing Science)
Department of Computing Science
- Date accepted
- Graduation date
Master of Science
- Degree level
Pointer analysis is a program analysis that determines the memory locations pointed to by individual pointers.
Imprecise pointer information is a major impediment to data-flow analyses and back-end optimizations that depend on pointer information.
Most pointer analyses are based on a points-to abstraction,
which is an abstraction of memory that partitions the conceptually infinite number of memory locations into a finite number of abstract objects.
In a flow-sensitive pointer-analysis, a points-to relationship between abstract objects is computed at each program point.
Our pointer analysis is based on another abstraction called the Expression Data Flow graph,
which expresses the memory dependencies between expressions that appear in a program.
This abstraction represents pointer information in a more compact and more precise way than a points-to abstraction.
We present a flow-sensitive and field-sensitive algorithm that computes a precise Expression Data Flow graph of a program in a negligible amount of time.
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