The pattern was common over all the transformers

Use a fresh variable in the following code,
so it does not hide the "unusedness".

Inline optimization can now handle compound arguments and return values.
This includes the new array types.

The only user is unreachable (ignore_runtime is false).

now the frontend is only responsible to mangle the ld_name, entity
creation is left to libfirm which now also caches the entities.

In general, handle array types like compound types.
Since we skip the if-condition for compound types,
we also need to do it for array types in this case.

structs are bad in a library API. We provide setter functions for the
fields now.

You should specify the pinned attribute when calling new_ir_op and not
change it later.