// This is the usual case, but consider falling back to old approach
  // if transposing string tensors becomes needed while folding.
  if (!input_tensor.getElementType().isIntOrIndexOrFloat()) return nullptr;
  SmallVector<int64_t> perms;
  SmallVector<int64_t> output_shape;
  ArrayRef<int64_t> input_shape = input_tensor.getType().getShape();
  auto attr_iter = perm_tensor.getValues<IntegerAttr>();