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International Conference on Software Technology and Engineering, 3rd (ICSTE 2011)

By
Mohamed Othman
Mohamed Othman
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Raja Suzana Raja Kasim
Raja Suzana Raja Kasim
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ISBN:
9780791859797
No. of Pages:
760
Publisher:
ASME Press
Publication date:
2011

Algorithmic Differentiation (AD) is applied to numerical simulation programs in order to produce code for the computation of various kinds of derivatives. A data flow analysis called To-Be-Recorded (TBR) analysis aims to detect the set of variables required in reverse section and values that can be lost because of the overwriting in forward section for adjoint mode of AD. The implementation of the TBR analysis uses a syntax-directed algorithm based on the following attribute grammar. The expected result of TBR analysis is to get more efficient generated code in terms of memory. We have implemented TBR analysis inside our AD-tool called “Derivative Code Compiler (DCC)”. Depending on the testing cases, the percentage of memory savings can be different. In the test case illustrated in this paper, a memory saving of approximately 18% was achieved.

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