message: Add description for FuseTransposeMklOpTranspose().
diff: @@ -897,6 +897,8 @@ class MklLayoutRewritePass : public GraphOptimizationPass {
  Status FuseNode(std::unique_ptr<Graph>* g, std::vector<Node*>& nodes,
  const MklLayoutRewritePass::FusionInfo fi);
  + // Fuse tranpose(to "NHWC") + mklop("NHWC") + transpose(to "NCHW") into mklop("NCHW").
  + // Here "mklop" can be any MKL-DNN supported op, such as Conv2D.
  static Status FuseTransposeMklOpTranspose(
  std::unique_ptr<Graph>* g, std::vector<Node*>& nodes,
  std::function<void(const Node*, NodeBuilder* nb, bool)> copy_attrs,
  