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\section{Overview}  \label{se:overview}  In this section we provide an overview of our approach to OSR.  The key to platform independence in our work is to express the entire OSR machinery at intermediate code representation level, without resorting to machine-level code manipulation or special intrinsics of the intermediate language. %Before describing how this is achieved in LLVM, we provide an overview of our approach. %\subsection{Overview}  %\label{ss:overview}