Optimized IR:
/*******************************************************
 *                       WARNING                       *
 *  Solidity to Yul compilation is still EXPERIMENTAL  *
 *       It can result in LOSS OF FUNDS or worse       *
 *                !USE AT YOUR OWN RISK!               *
 *******************************************************/

object "C_2" {
    code {
        {
            mstore(64, 128)
            if callvalue() { revert(0, 0) }
            let _1 := datasize("C_2_deployed")
            codecopy(0, dataoffset("C_2_deployed"), _1)
            return(0, _1)
        }
    }
    object "C_2_deployed" {
        code {
            {
                mstore(64, 128)
                if iszero(lt(calldatasize(), 4))
                {
                    mstore(0, 0)
                    calldatacopy(28, 0, 4)
                }
                revert(0, 0)
            }
        }
    }
}

Optimized IR:
/*******************************************************
 *                       WARNING                       *
 *  Solidity to Yul compilation is still EXPERIMENTAL  *
 *       It can result in LOSS OF FUNDS or worse       *
 *                !USE AT YOUR OWN RISK!               *
 *******************************************************/

object "D_13" {
    code {
        {
            mstore(64, 128)
            if callvalue() { revert(0, 0) }
            let _1 := datasize("D_13_deployed")
            codecopy(0, dataoffset("D_13_deployed"), _1)
            return(0, _1)
        }
    }
    object "D_13_deployed" {
        code {
            {
                mstore(64, 128)
                if iszero(lt(calldatasize(), 4))
                {
                    let _1 := 0
                    mstore(_1, _1)
                    calldatacopy(28, _1, 4)
                    if eq(0x26121ff0, mload(_1))
                    {
                        if callvalue() { revert(_1, _1) }
                        if slt(add(calldatasize(), not(3)), _1) { revert(_1, _1) }
                        let _2 := mload(64)
                        let _3 := datasize("C_2")
                        let _4 := add(_2, _3)
                        if or(gt(_4, 0xffffffffffffffff), lt(_4, _2)) { revert(_1, _1) }
                        datacopy(_2, dataoffset("C_2"), _3)
                        pop(create(_1, _2, sub(_4, _2)))
                        return(allocateMemory(_1), _1)
                    }
                }
                revert(0, 0)
            }
            function allocateMemory(size) -> memPtr
            {
                memPtr := mload(64)
                let newFreePtr := add(memPtr, size)
                if or(gt(newFreePtr, 0xffffffffffffffff), lt(newFreePtr, memPtr)) { revert(0, 0) }
                mstore(64, newFreePtr)
            }
        }
        object "C_2" {
            code {
                {
                    mstore(64, 128)
                    if callvalue() { revert(0, 0) }
                    let _1 := datasize("C_2_deployed")
                    codecopy(0, dataoffset("C_2_deployed"), _1)
                    return(0, _1)
                }
            }
            object "C_2_deployed" {
                code {
                    {
                        mstore(64, 128)
                        if iszero(lt(calldatasize(), 4))
                        {
                            mstore(0, 0)
                            calldatacopy(28, 0, 4)
                        }
                        revert(0, 0)
                    }
                }
            }
        }
    }
}