The easiest way to move an offset

[Serg046]

As answered here, the lib takes care about br instructions so that they point to the right places. For example, I have the following

IL_0001 br IL_0003
...
IL_0003 call ...

and use InsertBefore(IL_0003) to put two additional instructions:

IL_0001 br IL_0003
...
IL_0000 nop
IL_0000 nop
IL_0003 call ...

So br still points to ret. Usually this is what you want but in my case I need to point to the first nop because it is additional work to configure a valid state for call. Of course, I can just look for all br-like related instructions and update them but maybe you know a better way that you can advise here. E.g. I can imagine using of Replace(...) so that I have something like that

IL_0001 br IL_0003
...
IL_0003 nop #replaced using Replace(...)
IL_0000 nop
IL_0000 call ...

But it is not convenient too.

[ltrzesniewski]

I suppose the easiest way would be to convert the call instruction into a nop by changing the opcode on the Instruction instance and clearing its operand, then inserting the second nop and a call instruction created from scratch afterwards. That way existing references would be preserved, but would now point to the first nop.

Maybe that's not very intuitive, but at least it won't require you to update the references (which is a bit tricky to get right).

[Serg046]

Hmm, thank you! I think it is convenient enough 👍