abergeron commented on issue #4758: [relay] ADT match becomes not well formed during VM optimization URL: https://github.com/apache/incubator-tvm/issues/4758#issuecomment-578918024 After some experimentation, if I comment out InlinePrimitives at line 921 in compiler.cc (https://github.com/apache/incubator-tvm/blob/master/src/relay/backend/vm/compiler.cc#L921), then the compilation works. It seems this is the line that introduces the weird change. If I add an override like this: ``` Expr VisitExpr_(const MatchNode* m) { std::vector<Clause> clauses; for (const Clause& p : m->clauses) { clauses.push_back(VisitClause(p)); } return GetRef<Expr>(m); } ``` to the PrimitiveInliner class (in https://github.com/apache/incubator-tvm/blob/master/src/relay/backend/vm/inline_primitives.cc#L54), it appears to make the compilation work (at least in my limited example), but this may have some other consequences that I am not aware of (I suspect this means that no transformations will be applied to the body of match clauses, which might be bad). I'll keep working on that for a bit trying to find an acceptable solution, but I will gladly take any help/hints that I can get.
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