Changes

We do not generate code for blocks that are just visited for effect (as
there is none). Example would be just a line like
["this does nothing as we do not store it nor assign it" |temp| temp :=
1].
But this is not a good idea as the compiler creates meta data that we
need to access temps and map to the bytecode.
This PR thus enables compiling code for blocks visited for effect only.

We do not generate code for blocks that are just visited for effect (as
there is none). Example would be just a line like
["this does nothing as we do not store it nor assign it" |temp| temp :=
1].
But this is not a good idea as the compiler creates meta data that we
need to access temps and map to the bytecode.
This PR thus enables compiling code for blocks visited for effect only.