Abstract
Partial Redundancy Elimination (PRE) is a general scheme for suppressing partial redundancies which encompasses traditional optimizations like loop invariant code motion and redundant code elimination. In this paper, we address the problem of performing this optimization interprocedurally. We present an Interprocedural Partial Redundancy Elimination (IPRE) scheme based upon a new, concise, full program representation. Our method is applicable to arbitrary recursive programs. We use interprocedural partial redundancy elimination for placement of communication and communication preprocessing statements while compiling for distributed memory parallel machines. We have implemented our scheme as an extension to the Fortran D compilation system. We present experimental results from two codes compiled using our system to demonstrate the useful of IPRE in distributed memory compilation.
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