object "main" {
    code {
        // Arguments to ``datasize`` and ``dataoffset`` need to be
        // literals. We cannot simplify their arguments, but we can
        // simplify them as a full expression.
        // ``datacopy`` does not have this restriction.
        let r := "abc"
        let a := datasize("abc")
        let x := dataoffset("abc")
        // should be replaced by a
        let y := datasize("abc")
        datacopy("abc", x, y)
        mstore(a, x)
    }
    data "abc" "Hello, World!"
}
// ----
// step: commonSubexpressionEliminator
//
// object "main" {
//     code {
//         let r := "abc"
//         let a := datasize("abc")
//         let x := dataoffset("abc")
//         let y := a
//         datacopy(r, x, a)
//         mstore(a, x)
//     }
//     data "abc" hex"48656c6c6f2c20576f726c6421"
// }