mbarrett97 opened a new pull request #4771: [Relay] Added Merge Composite pass URL: https://github.com/apache/incubator-tvm/pull/4771 This adds a pass, MergeComposite, which merges patterns (expressed as Relay expressions). The detected patterns are wrapped in a function call which is marked with a 'Composite' attribute that names the pattern. This is primarily for use with the external codegen infrastructure in the case where a combination of Relay ops map to a single external codegen op. It is not the same as fusion. Further discussion on this PR can be found at https://discuss.tvm.ai/t/rfc-external-codegen-defining-composite-relay-operators/5470.
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