From: Daniel Arndt <daniel.arndt@iwr.uni-heidelberg.de>
Date: Thu, 25 Jan 2018 09:08:28 +0000 (+0100)
Subject: Simplify Utilities::MPI::sum for *Tensor
X-Git-Tag: v9.0.0-rc1~519^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F5801%2Fhead;p=dealii.git

Simplify Utilities::MPI::sum for *Tensor
---

diff --git a/include/deal.II/base/mpi.templates.h b/include/deal.II/base/mpi.templates.h
index c927d96441..15162ed41c 100644
--- a/include/deal.II/base/mpi.templates.h
+++ b/include/deal.II/base/mpi.templates.h
@@ -366,20 +366,9 @@ namespace Utilities
     sum (const Tensor<rank,dim,Number> &local,
          const MPI_Comm &mpi_communicator)
     {
-      const unsigned int n_entries = Tensor<rank,dim,Number>::n_independent_components;
-      Number entries[ Tensor<rank,dim,Number>::n_independent_components ];
-
-      for (unsigned int i=0; i< n_entries; ++i)
-        entries[i] = local[ local.unrolled_to_component_indices(i) ];
-
-      Number global_entries[ Tensor<rank,dim,Number>::n_independent_components ];
-      dealii::Utilities::MPI::sum( entries, mpi_communicator, global_entries );
-
-      Tensor<rank,dim,Number> global;
-      for (unsigned int i=0; i< n_entries; ++i)
-        global[ global.unrolled_to_component_indices(i) ] = global_entries[i];
-
-      return global;
+      Tensor<rank, dim, Number> sums;
+      dealii::Utilities::MPI::sum(local, mpi_communicator, sums);
+      return sums;
     }