t         *abi.Type
	framePool *sync.Pool
	abid      abiDesc
}

var layoutCache sync.Map // map[layoutKey]layoutType

// funcLayout computes a struct type representing the layout of the
// stack-assigned function arguments and return values for the function
// type t.
// If rcvr != nil, rcvr specifies the type of the receiver.
// The returned type exists only for GC, so we only fill out GC relevant info.