From 925d0d375a05f09c3e3abb91f29fc2513bb25d0d Mon Sep 17 00:00:00 2001
From: Benoit Steiner <benoit.steiner.goog@gmail.com>
Date: Wed, 1 Jul 2015 11:32:04 -0700
Subject: Enabled the vectorized evaluation of several tensor expressions that
 was previously disabled by mistake

---
 .../CXX11/src/Tensor/TensorForwardDeclarations.h    | 21 ++++++++++++++++++++-
 1 file changed, 20 insertions(+), 1 deletion(-)

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

diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorForwardDeclarations.h b/unsupported/Eigen/CXX11/src/Tensor/TensorForwardDeclarations.h
index 7df8d1453..b3bc16bc4 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorForwardDeclarations.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorForwardDeclarations.h
@@ -51,8 +51,27 @@ template<typename XprType> class TensorForcedEvalOp;
 template<typename ExpressionType, typename DeviceType> class TensorDevice;
 template<typename Derived, typename Device> struct TensorEvaluator;
 
+class DefaultDevice;
+class ThreadPoolDevice;
+class GpuDevice;
+
 namespace internal {
-template<typename Expression, typename Device, bool Vectorizable> class TensorExecutor;
+
+template <typename Device, typename Expression>
+struct IsVectorizable {
+  static const bool value = TensorEvaluator<Expression, Device>::PacketAccess;
+};
+
+template <typename Expression>
+struct IsVectorizable<GpuDevice, Expression> {
+  static const bool value = TensorEvaluator<Expression, GpuDevice>::PacketAccess &&
+                            TensorEvaluator<Expression, GpuDevice>::IsAligned;
+};
+
+template <typename Expression, typename Device,
+          bool Vectorizable = IsVectorizable<Device, Expression>::value>
+class TensorExecutor;
+
 }  // end namespace internal
 
 }  // end namespace Eigen
-- 
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