Like to know more about iTunes Match

I've looked around and didn't really get my question answered, so I have decided to ask the support community. I want to know if the Match will get the music off of my iPad and iTouch I had from my old PC? Not knowing enough about the system, I had hoped to transfer the music via the iDevices when I upgraded. Now I don't have much hope that I will be able to retrieve that music from the devices using the iTunes Match, but I still have some hope.