You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: vm_tape_cuda.go
    path of file: ./repos/gorgonia
    
    the code of the file until where you have to start completion: // +build cuda

package gorgonia

import (
	"github.com/pkg/errors"
	"gorgonia.org/cu"
	"gorgonia.org/tensor"
)

func finalizeTapeMachine(m *tapeMachine) {
	cudaLogf("Finalizing tape machine %p", m)
	m.cleanup()
	m.initFail() // not really a failure. Just call t
    
func (m *tapeMachine) init() {
	var initCUDA bool
	cudaLogf("instructions %v", len(m.p.instructions))
	for _, instr := range m.p.instructions {
		if eo, ok := instr.(*execOp); ok {
			if _, ok := eo.op.(CUDADoer); ok {
				initCUDA = true
				break
			}
		}
	}

	// don't bother initializing contexts if no instructions were CUDA based
	if !initCUDA {
		cudaLogf("No CUDA ops")
		return
	}

	if err := m.ExternMetadata.init(m.p.gpumem); err != nil {
		m.ExternMetadata.initFail()
		panic(err)
	}
	m.loadStdLib()

}