message: Add contrib.rnn ops to the whitelist
  These all use CUBLAS on the GPU.
diff: @@ -63,7 +63,8 @@ class AutoMixedPrecisionLists {
  #if CUDA_VERSION >= 9010 // Fp16 BatchMatMul is slow before CUDA 9.1.
  "BatchMatMul",
  #endif
  - "Conv2D", "Conv2DBackpropFilter", "Conv2DBackpropInput",
  + "BlockLSTM", "BlockLSTMGrad", "Conv2D", "Conv2DBackpropFilter",
  + "Conv2DBackpropInput",
  // TODO(benbarsdell): Enable these when Tensor Core kernels are
  // available for 3D convolutions.
  // "Conv3D",
  @@ -72,7 +73,8 @@ class AutoMixedPrecisionLists {
  // "Conv3DBackpropInput",
  // "Conv3DBackpropInputV2",
  "CudnnRNN", "CudnnRNNBackprop", "CudnnRNNBackpropV2",
  - "CudnnRNNBackpropV3", "CudnnRNNV2", "CudnnRNNV3",
  + "CudnnRNNBackpropV3", "CudnnRNNV2", "CudnnRNNV3", "GRUBlockCell",
  + "GRUBlockCellGrad", "LSTMBlockCell", "LSTMBlockCellGrad",
  // TODO(benbarsdell): Enable these when fast and safe fp16 kernels are
  // available for depthwise convolutions.
  // "DepthwiseConv2dNative",
  