From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Thu, 16 Dec 2021 14:46:14 +0000 (-0700)
Subject: Alternative way to avoid warnings.
X-Git-Tag: v9.4.0-rc1~726^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6db7cde3886837f725d0f01c78acf5eeca3cdef2;p=dealii.git

Alternative way to avoid warnings.
---

diff --git a/include/deal.II/matrix_free/fe_evaluation.h b/include/deal.II/matrix_free/fe_evaluation.h
index ca1be236f1..8d8ee87007 100644
--- a/include/deal.II/matrix_free/fe_evaluation.h
+++ b/include/deal.II/matrix_free/fe_evaluation.h
@@ -3666,7 +3666,10 @@ FEEvaluationBase<dim, n_components_, Number, is_face, VectorizedArrayType>::
       return;
     }
 
-  const unsigned int *dof_indices[n_lanes];
+  // Allocate pointers, then initialize all of them to nullptrs and
+  // below overwrite the ones we actually use:
+  std::array<const unsigned int *, n_lanes> dof_indices;
+  dof_indices.fill(nullptr);
 
   // Assign the appropriate cell ids for face/cell case and get the pointers
   // to the dof indices of the cells on all lanes
@@ -3706,8 +3709,6 @@ FEEvaluationBase<dim, n_components_, Number, is_face, VectorizedArrayType>::
           dof_indices[v] =
             this->dof_info->dof_indices.data() + my_index_start[0].first;
         }
-      for (unsigned int v = n_vectorization_actual; v < n_lanes; ++v)
-        dof_indices[v] = nullptr;
     }
   else
     {
@@ -3740,8 +3741,6 @@ FEEvaluationBase<dim, n_components_, Number, is_face, VectorizedArrayType>::
           dof_indices[v] =
             this->dof_info->dof_indices.data() + my_index_start[0].first;
         }
-      for (unsigned int v = n_vectorization_actual; v < n_lanes; ++v)
-        dof_indices[v] = nullptr;
     }
 
   // Case where we have no constraints throughout the whole cell: Can go