Optimized IR:
/// @use-src 0:"optimizer_array_sload/input.sol"
object "Arraysum_34" {
    code {
        {
            /// @src 0:80:429  "contract Arraysum {..."
            let _1 := memoryguard(0x80)
            mstore(64, _1)
            if callvalue() { revert(0, 0) }
            let _2 := datasize("Arraysum_34_deployed")
            codecopy(_1, dataoffset("Arraysum_34_deployed"), _2)
            return(_1, _2)
        }
    }
    /// @use-src 0:"optimizer_array_sload/input.sol"
    object "Arraysum_34_deployed" {
        code {
            {
                /// @src 0:80:429  "contract Arraysum {..."
                mstore(64, memoryguard(0x80))
                let _1 := 4
                if iszero(lt(calldatasize(), 4))
                {
                    if eq(0x81d73423, shr(224, calldataload(0)))
                    {
                        if callvalue() { revert(0, 0) }
                        if slt(add(calldatasize(), not(3)), 0) { revert(0, 0) }
                        let var_sum := 0
                        /// @src 0:368:378  "uint i = 0"
                        let var_i := /** @src 0:80:429  "contract Arraysum {..." */ 0
                        let _2 := sload(0)
                        /// @src 0:364:423  "for(uint i = 0; i < values.length; i++)..."
                        for { }
                        /** @src 0:380:397  "i < values.length" */ lt(var_i, _2)
                        /// @src 0:368:378  "uint i = 0"
                        {
                            /// @src 0:80:429  "contract Arraysum {..."
                            if eq(var_i, not(0))
                            {
                                mstore(0, shl(224, 0x4e487b71))
                                mstore(_1, 0x11)
                                revert(0, 0x24)
                            }
                            /// @src 0:399:402  "i++"
                            var_i := /** @src 0:80:429  "contract Arraysum {..." */ add(var_i, 1)
                        }
                        /// @src 0:399:402  "i++"
                        {
                            /// @src 0:80:429  "contract Arraysum {..."
                            mstore(0, 0)
                            let sum := add(var_sum, sload(add(18569430475105882587588266137607568536673111973893317399460219858819262702947, var_i)))
                            if gt(var_sum, sum)
                            {
                                mstore(0, shl(224, 0x4e487b71))
                                mstore(_1, 0x11)
                                revert(0, 0x24)
                            }
                            /// @src 0:407:423  "sum += values[i]"
                            var_sum := sum
                        }
                        /// @src 0:80:429  "contract Arraysum {..."
                        let memPos := mload(64)
                        mstore(memPos, var_sum)
                        return(memPos, 32)
                    }
                }
                revert(0, 0)
            }
        }
        data ".metadata" hex"<BYTECODE REMOVED>"
    }
}