NDLI: The program dependence graph and vectorization

Content Provider	ACM Digital Library
Author	Bauer, H. R. Baxter, W.
Abstract	Previous attempts at vectorizing programs written in a sequential high level language focused on converting control dependences to data dependences using a mechanism known as IF-conversion. After IF-conversion vector optimizations are performed on a data dependence graph. However, IF-conversion is an irrevocable process which can introduce high run-time overhead if the input program is not amenable to vectorization.This paper uses a program dependence graph as the intermediate representation for a vectorizing compiler. A program dependence graph explicitly represents both control and data dependences, allowing guard values to be generated for vectorized statements. Techniques have been developed to perform code motion on vectorization candidates, to validly eliminate all unnecessary control and data dependence cycles, and to regenerate the newly vectorized program consistent with a topological ordering based on the control and data dependences.
Starting Page	1
Ending Page	11
Page Count	11
File Format	PDF
ISBN	0897912942
DOI	10.1145/75277.75278
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	1989-01-03
Publisher Place	New York
Access Restriction	Subscribed
Content Type	Text
Resource Type	Article

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The program dependence graph and vectorization