// This function is less efficient because the optimizer currently fails to
// remove the bounds checks in array access.

function sumSolidity(uint[] _data) returns (uint o_sum) {
    for (uint i = 0; i < _data.length; ++i)
        o_sum += _data[i];
}

// We know that we only access the array in bounds, so we can avoid the check.
// 0x20 needs to be added to an array because the first slot contains the
// array length.

function sumAsm(uint[] _data) returns (uint o_sum) {
    for (uint i = 0; i < _data.length; ++i) {
        assembly {
            o_sum := add(o_sum, mload(add(add(_data, 0x20), mul(i, 0x20))))
        }
    }
}

struct MyStruct {
    uint256 var_1;
    uint256 var_2;
    address addr_1;
}