applying EIGEN_DECLARE_TEST to *gpu* tests

Also, a few minor fixes for GPU tests running in HIP mode.

1. Adding an include for hip/hip_runtime.h in the Macros.h file
   For HIP __host__ and __device__ are macros which are defined in hip headers.
   Their definitions need to be included before their use in the file.

2. Fixing the compile failure in TensorContractionGpu introduced by the commit to
   "Fuse computations into the Tensor contractions using output kernel"

3. Fixing a HIP/clang specific compile error by making the struct-member assignment explicit

1 files changed, 4 insertions, 2 deletions

diff --git a/Eigen/src/Core/util/Macros.h b/Eigen/src/Core/util/Macros.h
index fc4c0815c..adf25ee9b 100644
--- a/Eigen/src/Core/util/Macros.h
+++ b/Eigen/src/Core/util/Macros.h
@@ -395,8 +395,10 @@
   // Means the compiler is HIPCC (analogous to EIGEN_CUDACC, but for HIP)
   #define EIGEN_HIPCC __HIPCC__
 
-  // We need hip_common.h here because __HIP_DEVICE_COMPILE__ is defined in this header.
-  #include <hip/hip_common.h>
+  // We need to include hip_runtime.h here because it pulls in
+  // ++ hip_common.h which contains the define for  __HIP_DEVICE_COMPILE__ 
+  // ++ host_defines.h which contains the defines for the __host__ and __device__ macros
+  #include <hip/hip_runtime.h>
 
   #if defined(__HIP_DEVICE_COMPILE__)
     // analogous to EIGEN_CUDA_ARCH, but for HIP