Failed attempt to use OptOutMutator

[wujingyue]

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[github-actions]

Description

• Replaced manual operand replacement with OptOutMutator

• Simplified input and output handling in cloneWithNewOperands

Changes walkthrough

	Relevant files
Enhancement	lowering.cpp Use OptOutMutator for operand replacement                                csrc/host_ir/lowering.cpp Removed manual operand replacement logic Introduced OptOutMutator for operand replacement Simplified loop for handling inputs and outputs +13/-20

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🧪 No relevant tests

⚡ Recommended focus areas for review

Possible Issue The mutateExprOutputsOnly method is called after mutate, which might lead to unexpected behavior or double mutation of the expression outputs. mutator.mutate(e); return mutator.mutateExprOutputsOnly(e); Code Duplication The logic for handling inputs and outputs is similar. Consider refactoring to avoid code duplication. for (auto* input : e->inputs()) { Val* new_input = getOrDefault(replacement_map, input); if (new_input != nullptr) { mutator.registerMutation(input, new_input); } } for (auto* output : e->outputs()) { Val* new_output = getOrDefault(replacement_map, output); if (new_output != nullptr) { mutator.registerMutation(output, new_output); } }