Can't find stride and padding informations after relay.build function

Hello, I am a beginner of TVM and I run the tutorials on official website to learn TVM. I noticed that before relay.build function there has stride and padding informations stored in the model. After relay.build function, conducting some kinds of graph-level optimizations, there has no stride and padding information in the optimized graph. I wonder where could I find the stride and padding informations after relay.build function? Thanks a lot.