lab.target = s.f.NewBlock(ssa.BlockPlain)
		}

		b := s.endBlock()
		b.Pos = s.lastPos.WithIsStmt() // Do this even if b is an empty block.
		b.AddEdgeTo(lab.target)

	case ir.OAS:
		n := n.(*ir.AssignStmt)
		if n.X == n.Y && n.X.Op() == ir.ONAME {
			// An x=x assignment. No point in doing anything
			// here. In addition, skipping this assignment
			// prevents generating: