From a278414d1b1220d56f574a80027955c55542cd95 Mon Sep 17 00:00:00 2001
From: Benoit Steiner <benoit.steiner.goog@gmail.com>
Date: Tue, 19 Apr 2016 13:54:28 -0700
Subject: [PATCH] Avoid an unnecessary copy of the evaluator.

---
 unsupported/Eigen/CXX11/src/Tensor/TensorExecutor.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorExecutor.h b/unsupported/Eigen/CXX11/src/Tensor/TensorExecutor.h
index 7a54f7a23..907da9446 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorExecutor.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorExecutor.h
@@ -183,7 +183,7 @@ class TensorExecutor<Expression, GpuDevice, Vectorizable> {
 template <typename Evaluator, typename Index, bool Vectorizable>
 struct EigenMetaKernelEval {
   static __device__ EIGEN_ALWAYS_INLINE
-  void run(Evaluator eval, Index first, Index last, Index step_size) {
+  void run(Evaluator& eval, Index first, Index last, Index step_size) {
     for (Index i = first; i < last; i += step_size) {
       eval.evalScalar(i);
     }