The MPI datatype hash code was developed by Julien Langou and George Bosilca, University of Tennessee, and is used with permission under the following license:
Copyright (c) 1992-2007 The University of Tennessee. All rights reserved.
Additional copyrights may follow
Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
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This is similar to the method described in "Collective Error Detection for MPI Collective Operations", Chris Falzone, Anthony Chan, Ewing Lusk, William Gropp,
"Hash functions for MPI datatypes", Julien Langou, George Bosilca, Graham Fagg, Jack Dongarra,