From 96a24b05cc836072ce0fd2b50c4e94ea652bd1aa Mon Sep 17 00:00:00 2001
From: Benoit Steiner <benoit.steiner.goog@gmail.com>
Date: Sun, 21 Feb 2016 11:16:15 -0800
Subject: Optimized casting of tensors in the case where the casting happens to
 be a no-op

---
 unsupported/Eigen/CXX11/src/Tensor/TensorConversion.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'unsupported/Eigen/CXX11/src/Tensor/TensorConversion.h')

diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorConversion.h b/unsupported/Eigen/CXX11/src/Tensor/TensorConversion.h
index e254c0b7b..21bb91d69 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorConversion.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorConversion.h
@@ -195,8 +195,11 @@ struct TensorEvaluator<const TensorConversionOp<TargetType, ArgType>, Device>
 
   EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Dimensions& dimensions() const { return m_impl.dimensions(); }
 
-  EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE bool evalSubExprsIfNeeded(Scalar* /*data*/)
+  EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE bool evalSubExprsIfNeeded(Scalar* data)
   {
+    if (internal::is_same<TargetType, SrcType>::value) {
+      return m_impl.evalSubExprsIfNeeded((SrcType*)data);
+    }
     m_impl.evalSubExprsIfNeeded(NULL);
     return true;
   }
-- 
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