When a function returns multiple values in go, what's the memory representation of those multiple values when returned?
What it sounds like you're looking for is the stack frame design of Go. I'm not going into the details here, but you may find it helpful to read about it here.
In general the compiler can place multiple returns on the out space for the function call. Think an array as a result. The compiler then knows how to access the space on the stack for the subsequent caller.