Constructing Unions via the LLVM C++ Api

Question

I'm using LLVM to insert a function where of the arguments is a union, and I'm really struggling to work out how to create the union argument. I can't find anything about defining union types in the LLVM api (the union type is actually defined already in a separate file, but I can't even get the type builder to use this to create the correct type). How do I proceed.

Answer 1

Unions do not exist on the LLVM type level. You must do all requisite casting, byte blitting and such yourself.