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Valid transformations: a new class of loop transformations for high-level synthesis and pipelined scheduling applications

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2 Author(s)
Minjoong Rim ; Samsung, South Korea ; R. Jain

In this paper we present a new class of loop optimizing transformations called valid transformations, which are suitable for fine-grain parallelization applications such as high-level synthesis of VLSI designs or compilers for super-scalar or VLIW machines. This class of transformations are different from existing ones in that valid transformations can be illegal. Nevertheless, if a transformation is valid, the transformed loop has a feasible pipeline schedule. We present an example valid transformation called loop expansion which can help produce cost-performance efficient designs and explore a larger design space for a satisfactory design. Several examples are used to demonstrate the efficacy of the proposed technique

Published in:

IEEE Transactions on Parallel and Distributed Systems  (Volume:7 ,  Issue: 4 )