bool use_multiple_streams, std::shared_ptr<se::Event> definition_event) {
  xla::ShapeIndex output_index = input_output_alias.shape().IsTuple()
                                     ? xla::ShapeIndex({output_num})
                                     : xla::ShapeIndex({});
  CHECK(input_output_alias.shape().IsTuple() || output_num == 0);
  if (std::optional<xla::HloInputOutputAliasConfig::Alias> alias =

      // If the representation is a tuple, we also must wait for the tuple index
      // buffers to be available on the destination host to device transfer
      // stream.
      if (xla_output->shaped_buffer().on_device_shape().IsTuple()) {
        TF_RETURN_IF_ERROR(dst_xla_context->host_to_device_stream()->WaitFor(
            dst_compute_stream));
      }
    }

    for (const auto& leaf : xla_input->shaped_buffer().buffers().leaves()) {

      compilation_result->computation->GetProgramShape();
  TF_RET_CHECK(program_shape_or_status.ok());

  xla::ProgramShape& program_shape = program_shape_or_status.value();
  if (!program_shape.result().IsTuple())
    return errors::Internal("Expect result to have tuple shape");

  xla::HloInputOutputAliasConfig config(program_shape.result());
  for (auto alias : output_to_input_alias) {
    if (use_tuple_args) {

			sort.Sort(bySourcePos(order[start:]))
		}
	}

	return order
}

// isFlagOp reports if v is an OP with the flag type.
func (v *Value) isFlagOp() bool {
	if v.Type.IsFlags() || v.Type.IsTuple() && v.Type.FieldType(1).IsFlags() {
		return true
	}
	// PPC64 carry generators put their carry in a non-flag-typed register
	// in their output.
	switch v.Op {

			}
		}
	}

	memCheck(f)
}

func memCheck(f *Func) {
	// Check that if a tuple has a memory type, it is second.
	for _, b := range f.Blocks {
		for _, v := range b.Values {
			if v.Type.IsTuple() && v.Type.FieldType(0).IsMemory() {
				f.Fatalf("memory is first in a tuple: %s\n", v.LongString())
			}
		}
	}

	// Single live memory checks.
	// These checks only work if there are no memory copies.

			return true
		}
	}
	return false
}
func (t *Type) IsFlags() bool   { return t == TypeFlags }
func (t *Type) IsVoid() bool    { return t == TypeVoid }
func (t *Type) IsTuple() bool   { return t.kind == TTUPLE }
func (t *Type) IsResults() bool { return t.kind == TRESULTS }

// IsUntyped reports whether t is an untyped type.
func (t *Type) IsUntyped() bool {
	if t == nil {

		}
		if v.Op == OpPhi {
			// A Phi implies we have reached the top of the block.
			// The memory phi, if it exists, is always
			// the first logical store in the block.
			continue
		}
		if v.Type.IsTuple() && v.Type.FieldType(1).IsMemory() {
			// We could handle this situation however it is likely
			// to be very rare.
			return false
		}
		if v.Op.SymEffect()&SymAddr != 0 {