message: Add a comment to clarify that patterns in finfo_ shows up first will get applied first.
diff: @@ -514,6 +514,10 @@ class MklLayoutRewritePass : public GraphOptimizationPass {
  csinfo_.conv2d_grad_filter_with_bias,
  GetConv2DBackpropFilterOrBiasAddGrad});
  + // The fusion patterns in "finfo_" that show up first will get applied first,
  + // for example, graph "A->B->C-D" and finfo_ is {A->B->C to ABC, A->B->C->D to ABCD},
  + // since the first gets applied first, the final graph will be ABC->D.
  +
  //
  // Add rules to fuse sequences such as "Transpose (NCHW -> NHWC) + Conv2D
  // (NHWC) + Transpose (NHWC->
  