How to dump IRs for each pass when building a model

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Hi @donglinz, see the doc Install from Source — tvm 0.8.dev0 documentation (apache.org)

To debug with IRs, set(USE_RELAY_DEBUG ON) and set environment variable TVM_LOG_DEBUG.

export TVM_LOG_DEBUG="ir/transform.cc=1;relay/ir/transform.cc=1"

In short, first, you have to build TVM with debugging support and then set the environment variable before running.

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