}
    return WalkResult::advance();
  });
  return tpu_compile_successor;
}

// Get all the Blocks underneath `top` that are "in the scope" of `bottom`,
// i.e., are ancestors.
llvm::DenseSet<Block*> GetAllBlocksBetween(Operation* bottom, Operation* top) {
  llvm::DenseSet<Block*> blocks;
  Operation* op = bottom;
  while (op && op != top) {
    blocks.insert(op->getBlock());
    op = op->getParentOp();
  }
  return blocks;