pos := run[0].pos
			s.done.Append(ir.NewLabelStmt(pos, label))
			stringSearch(s.exprname, run, &s.done)
			s.done.Append(ir.NewBranchStmt(pos, ir.OGOTO, endLabel))

			// Add length case to outer switch.
			cas := ir.NewInt(pos, runLen(run))
			jmp := ir.NewBranchStmt(pos, ir.OGOTO, label)
			outer.Add(pos, cas, nil, jmp)
		}
		s.done.Append(ir.NewLabelStmt(s.pos, outerLabel))
		outer.Emit(&s.done)