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Posted to discuss-archive@tvm.apache.org by Luke Hutton via Apache TVM Discuss <no...@discuss.tvm.ai> on 2022/02/16 12:19:52 UTC
[Apache TVM Discuss] [Questions] Difference between MixedModeMutator and ExprRewriter
Hi,
I've been looking at types of Relay pass recently and got a bit confused when it comes to `MixedModeMutator` and when it should be used over `ExprRewriter`. The RFC (https://discuss.tvm.apache.org/t/performing-relay-passes-non-recursively/5696) seems to me to suggest that `ExprRewriter` should be used when wanting to mutate a graph non-recursively, yet I can see many uses of `MixedModeMutator` in the codebase for seemingly a similar reason. Therefore, I'm wondering if/what the difference is between `MixedModeMutator` and `ExprRewriter`, and when one should be used over the other?
cc @mbrookhart @tqchen @manupa-arm
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[Apache TVM Discuss] [Questions] Difference between MixedModeMutator and ExprRewriter
Posted by Luke Hutton via Apache TVM Discuss <no...@discuss.tvm.ai>.
Thanks @mbrookhart, this is what I suspected :)
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[Apache TVM Discuss] [Questions] Difference between MixedModeMutator and ExprRewriter
Posted by Matthew Brookhart via Apache TVM Discuss <no...@discuss.tvm.ai>.
Hi @lhutton1. That was the intention (it's somewhat safer to do a dataflow transformation without access to recursion at all), but MixedMode* was introduced well after TVM became a mature project, and it seems like most people prefer using the MixedModMutator directly, since the API is closer to ExprMutator.
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