case ir.OADDR:
		n := n.(*ir.AddrExpr)
		return s.addr(n.X)

	case ir.ORESULT:
		n := n.(*ir.ResultExpr)
		if s.prevCall == nil || s.prevCall.Op != ssa.OpStaticLECall && s.prevCall.Op != ssa.OpInterLECall && s.prevCall.Op != ssa.OpClosureLECall {
			panic("Expected to see a previous call")
		}
		which := n.Index
		if which == -1 {
			panic(fmt.Errorf("ORESULT %v does not match call %s", n, s.prevCall))
		}