// Extract out all the constant indices' attributes and verify that data
    // types are static.
    SmallVector<DenseIntElementsAttr, 4> indices;
    indices.reserve(op.getN());
    for (auto it : llvm::zip(op.getIndices(), op.getData())) {
      Value index = std::get<0>(it);
      Value data = std::get<1>(it);

      DenseIntElementsAttr index_attr;
      if (!matchPattern(index, m_Constant(&index_attr))) return failure();