mload_in_function.yul

{
        function foo(x) {
                for {} x { x := mload(0) mstore(0, 0)} {}
        }
        mstore(0, 1337)
        foo(42)
        sstore(0, mload(0))
}
// ----
// : can loop, writes storage, writes memory
// foo: can loop, writes memory