llvm::ArrayRef<Value>(init_values), reduction_dimensions,
        TypeRange({input_element_type, index_element_type}));
    auto direction = Derived::GetDirection();
    BuildArgMinMaxReductionBody(input_element_type, index_element_type,
                                direction, &reduction.getBody(), &rewriter);

    rewriter.replaceOp(op, {reduction.getResult(1)});
    return success();
  }
};

		// For 2, we need to ensure that if there might be partial overlap,
		// then we can't use OpMove; we must use memmove instead.
		// (memmove handles partial overlap by copying in the correct
		// direction. OpMove does not.)
		//
		// Note that we have to be careful here not to introduce a call when
		// we're marshaling arguments to a call or unmarshaling results from a call.